Ceco Environmental DEAN PUMP DL200 Series Instruction manual

Inline Centrifugal Pr cess Pumps
Instructi n Manual MC 1.2.21.5 DO NOT OPERATE PUMP BEFORE READING THIS MANUAL
6040 Gui n R ad • Indianap lis, IN 46254
[phone] • FAX: [phone]
E-mail: inf @deanpump.c m • Web Site: www.deanpump.c m
MET-PRO
A Met-Pro Fluid Handling Technologies Business
Combining the Resources of Dean Pump, Fybroc & Sethco
Global Pump Solutions
Rea the instruction manual completely, before installing, filling, operating, or maintaining this equipment.
Obtain, rea , an hee the MSDS (Material Safety Data Sheet) for the flui s being han le before attempting to
fill, operate or maintain this equipment.
Obtain instructions from the Safety Engineer responsible for your facility before performing any work on the pump-
ing equipment an systems.
APPLICATION AND REAPPLICATION - At the time of installation, the equipment receive shoul have alrea y been
selecte for the service require . You must rea the paperwork for the installation an check serial number of the
pump to assure that you are installing the correct pump into the service for which it was selecte .
Many pumps look i entical from the outsi e but can be ma e of ifferent materials an /or be constructe ifferently
insi e. Personal injury, eath, equipment amage, pro uct (pumpage) amage, an /or pro uct loss coul occur if the
incorrect pump is installe .
Do not transfer an existing pump to any other service con itions until you have thoroughly reviewe the pump
construction, materials, sizing, sealing, pressure containing capability, hea /capacity capability, an
temperature capability with respect to the require service. Consult your DEAN PUMP sales engineer with all the
service requirements an a full escription of the existing pump (inclu ing the serial number), seal, an sub-systems
so that we can assist you in a successful reapplication.
INSTALLATION - Always wear the appropriate protective apparel when working on or aroun the pumping equipment.
Safety glasses with si e shiel s, heavy work gloves (use insulate work gloves when han ling hot items), steel toe
shoes, har hat, an any other protective gear as nee e for protection. One example of other gear woul be
breathing apparatus when working near toxic materials.
Use lifting evices, manufacture expressly for the purpose of lifting, to move the pumping machinery. Do not attempt
to lift the assembly or its components manually. Use only evices with lifting capabilities in excess of the weight of
the unit being lifte . Inspect straps,chains, hooks, etc. for amage an lifting capability before use. Lift only at the
center of gravity.
Personal injury, eath, an /or equipment amage coul occur if goo lifting practices are not use .
Install the equipment on a properly esigne an built foun ation. Assure that the river (motor, turbine,or engine)
shaft is properly aligne to the pump shaft.
Connect the suction an ischarge piping without forcing the piping into position. The pipe flanges must line up
with the pump flanges “freely”. Strain cause by “forcing” an /or misalignment may cause failure of the pumping
unit, flanges, an /or the piping resulting in flui (pumpage) release. This coul cause personal injury, eath an /or
amage to this an /or other equipment.
Install a “new” bolt, of the correct size per ASME/ANSI B16.5 an the correct material per ASME/ANSI B16.5,
in every bolt hole. Tighten all bolts evenly. Use only new uncorro e fasteners.
Improper flange bolting may cause failure of the pumping unit, flanges, piping, an /or flui (pumpage) release
which coul cause personal injury, eath, an /or amage to this an /or other equipment.
Connect all other (auxiliary) piping necessary for safe an successful operation of the equipment in the specific ser-
vice con itions of the application. Make sure that all piping is installe into it’s correct connection. Installation of a
pipe into an incorrect location coul result in an explosion an personal injury or eath as well as amage to this
an /or other equipment.
Install pressure relief valves in any cavities that coul be subjecte to pressures in excess of the allowable working
pressure of that cavity. Explosion, personal injury, eath, an /or amage to this an /or other equipment may occur
if pressure excee s allowable.
Recheck the alignment between the river (motor, turbine, or engine) an pump shafts. Installation of piping may have
force the pump out of alignment. If so, correct the piping to remove the istorting loa .
Check to be certain that the shaft coupling spacer is not installe , an then gently bump the motor starter to check
the rotational irection of the motor. If this is not in the irection of rotation require for the pump, make the neces-
sary corrections.
Lock-out the power to the river (motor, turbine, engine, etc.)
Install the shaft coupling spacer. Be sure that you install all the retaining evices an bolts an that they are tight.
Rea an comply with the coupling manufacturer’s instructions. Personal injury, eath, an /or equipment amage
coul occur if the coupling spacer is not properly installe . Remove all ebris an tools from the area near the shafts
an the shaft coupling. Do this to assure that nothing is caught an thrown by the rotating parts when the pump is
starte . Bolt the coupling guar securely to the baseplate, checking to assure that it is not contacting any parts that
will rotate when the pump is starte .
FILLING - Before filling the pump with liqui , check to see that all possible leak locations are seale . See that all of
the connections into the pressure containing cavity are seale or connecte to a relate piping system that also has
all possible leak paths seale . Do not plug unuse jacket cavities, as this coul evelop angerous pressure buil -
up. Use a wrench on all bolte joints to apply torque to assure that all gaskets are seale in a tight joint. Check to
see that all threa e pipe connections are also tight enough to seal the liqui pressure that will be applie when
the system is starte .
OPERATING - Before starting the unit, see that all personnel are a safe istance away from all possible hazar s,
that all sub-systems are connecte an operating, that all ebris has been remove , that the shaft coupling guar
is securely in place, an that the pump is full of liqui .
Do not operate this pump at shut-off (no flow) as an explosion may result. This can occur with any liqui , even “col
water”. Personal injury, eath, equipment amage, an /or loss of pro uct (pumpage) is likely to occur. If your sys-
tem is operate where it is possible for all outlets for the ischarge from the pump to be close while the pump is
still operating, a mo ification of the system nee s to be ma e to assure a continual flow of pumpage through the
pump. Note that some people have a belief that a bypass line from the ischarge si e of the pump to the suction
si e of the pump will relieve this problem, this is “NOT TRUE”; DO NOT ATTEMPT THIS.
MAINTENANCE, DISASSEMBLY AND REPAIR - Work must be performe only by thoroughly traine an qualifie
personnel to assure quality repair an to re uce the possibilities of injury to personnel an /or amage to equip-
ment. If you o not have personnel who are capable of safe quality repair of this equipment, we a vise you to return
the equipment to DEAN PUMP to be repaire .
When it is necessary to open the pump an /or the pumping system, the flui will be expose to the atmosphere
an personnel in the area. For the safety of all involve , the risk of exposure of personnel to the hazar s of the
pumpage can be re uce by flushing the entire system with a compatible non-toxic, non-hazar ous,stable liqui
before opening the pump or the system. In all cases, where the system is flushe or not, use the utmost care aroun
the pumpage an the pumping system.
Always wear the appropriate protective apparel when working on or aroun the pumping equipment. Safety glass-
es with si e shiel s, heavy work gloves (use insulate work gloves when han ling hot items), steel-toe shoes, har
hat, an any other protective gear as nee e for protection. One example of other gear woul be breathing
apparatus when working near toxic materials.
Use only top quality tools.
Stop the pump. Turn off the power supply (electricity, steam, etc.) to the pump river (motor, turbine, engine, etc.)
an lock the switching evice so that it cannot be restarte . Tag the switching evice so that no one will attempt to
restart the unit.
Close the suction an ischarge valves completely to isolate the pump from the system. Lock the valves in the close
position an tag them so that no one will attempt to open them.
Turn off, lock out, an tag all sub-systems an auxiliary equipment an auxiliary supply lines to isolate the pump-
ing unit from any an all power, energy, an /or flui s.
Do not attempt to perform any work on the unit until you are confi ent that the pump an its contents have been
stabilize at ambient temperature, an atmospheric pressure.
Put on protective wear to protect human tissue from attack by the flui s containe in the pump an any sub-systems,
an from any vapors or fumes that coul possibly be release from these flui s. This coul mean breathing apparatus,
face shiel s, heavy long sleeve rubber gloves, rubber apron, hoo , an possibly more, epen ent of course on the
properties of the flui s involve an the installe rain an vent piping arrangement. Personal injury an /or eath
can occur if a equate precautions are not taken with regar to the flui , the installation, an the possibilities of the
release of flui , vapors, an /or fumes.
Remove the coupling guar . Remove the coupling spacer.
Drain all the flui s from the auxiliary sub-systems (lubrication, cooling, heating, seal barrier, etc.) that are connect-
e to the pump. Drain each flui into a separate container. Use caution require for each flui after rea ing the
MSDS (Material Safety Data Sheet) for each.
Flush each sub-system with a compatible, non-toxic, non-hazar ous, stable liqui . Drain into in ivi ual containers
for each flui . Disconnect an remove all auxiliary piping.
Carefully blee off any pressure remaining in the pump. Pressure remaining in the pump will be epen ent upon
the pressure in the system when the pump was stoppe ; the quality, type, an con ition of the isolation valves; the
thermal expansion valves of the flui an the pump material; an the change in the vapor pressure of the flui
between the temperature at the time the isolation valves were close an the ambient temperature. Blee ing must
be through a valve rain line pipe to a close container mounte lower than the pump. The container must be
arrange with a relief passage to some point where pressure an fumes will not be harmful to personnel. The
container must also have a level evice so that etermination can be ma e that sufficient flui has been raine to
empty the pump cavity an the volume of flui that was containe in the run of suction an ischarge pipe between
the isolation valves an the pump. After the initial rush of flui from the pump relieves the pressure, the rain valve
can be opene further to spee the raining operation. When flui quits running into the rain tank, gauge the
volume to see if it is sufficient to have fully raine the contents of the pump an the suction an ischarge pipes
between the isolation valves.
If the system was constructe without any rain connections, it will be necessary to consult the esigners of the system
for safe raining proce ures.
Now rain any small piping, that contains the flui pumpe , from all low points, into the same container use to rain
the pump. Do not rain any other flui s ( ifferent than the pumpage) into this container as they may not be
compatible. Personal injury, eath, an /or equipment amage coul occur.
Even though it might appear that, the cavity being raine has completely raine , be extremely careful about
opening the system an /or opening the pump. If something soli in the pumpage moves to the vicinity of the rain
connection, it coul seal-off the rain an maintain pressure in the cavity thought to have been raine . It is also
possible that the isolation valves are not sealing an therefore allowing liqui to flow from the system into the pump.
Personal injury, eath, an /or equipment amage may occur if intense caution is not exercise .
Because of the above possibility, when you loosen the gaskete joint at the back of the casing (5), loosen the bolts or
nuts only one full turn, an then use jack screws to break the gasket seal. If flui an /or pressure remains in the pump,
it will spray out now. Use extreme caution, wearing protective gear, to avoi injury. Do not procee with isas-
sembly until leakage ceases completely. If leakage oes not cease, the isolation valves may not be sealing. Note
that if the pump was purchase with out a rain, the pump will contain flui which will flow out at the time the bolts
are loosene an the gasket seal is broken.
When you open the pump, the flui will be expose to the atmosphere an personnel in the area. For the safety of
all involve , the risk of exposure can be re uce by flushing the cavity that was just raine , with a compatible non-
toxic, non-hazar ous, stable liqui , before isassembling the pump.
Remove the casing bolts or nuts an using mechanical lifting apparatus to support the weight, pull the rotating unit
from the casing.
Flush the wette parts now expose with compatible, non-toxic, non-hazar ous, stable liqui .
Remove the gasket from the face of the casing (5) or the bearing housing (26) epen ent on which one the gasket may
have a here to. The type of gasket an material of construction will vary with service requirements. Attack by prying
an then, if necessary, layering off the ol gasket with a sharp scraper, attempting to remove it in the largest possible
pieces. Wear heavy leather, long sleeve work gloves when using the scraper. Wet the gasket before an uring the
scraping operation to re uce the possibility of fibers becoming airborne. Wear a respirator uring this operation an
until all ebris has been ispose of in a plastic bag. Remove all of the gasket material own to clean metal surfaces
on both parts that contacte the gasket. Place all of the gasket resi ue in a plastic bag, seal the bag an ispose of it
in compliance with all government requirements.
The rotating assembly of the pump can now be move to a more convenient location for further isassembly. Use
only high quality tools. Flush parts as isassemble to remove hazar ous resi ue from the pumpage an /or
sub-system flui s.
Wear protective equipment as a vise at the beginning of these warnings.
Use mechanical lifting equipment to lift assemblies an components.
Do not apply heat to parts to assist in isassembly. Explosion coul occur causing personal injury, eath, an /or
amage to equipment.
Do not attempt to rill, saw, or otherwise cut parts to remove them. Explosion an /or fuming coul occur causing
personal injury, eath, an /or equipment amage.
Do not hammer on any parts. Personal injury an /or amage to equipment may occur.
Do not attempt to manufacture parts or mo ify Dean Pump parts in any manner. Death, personal injury, an /or
amage to equipment may occur.
One example of the above woul be overboring the seal chamber, which removes metal that is require to contain
flui s. Removal of this metal re uces the pressure containing capability of the part, an may create a leak path
through the part.
Replace all gaskets, seals, bearings, an lubricants. Replace all parts that have worn, corro e , ero e , or other-
wise eteriorate .
Use only Dean Pump Met-Pro Corporation parts.
HAZARDOUS SITUATIONS MAY OCCUR UNLESS THIS EQUIPMENT IS APPLIED, INSTALLED, OPERATED, AND MAINTAINED BY THOROUGHLY QUALIFIED PERSONNEL
IN STRICT ACCORDANCE WITH THE INSTRUCTION MANUAL AND ALL APPLICABLE DRAWINGS AND CODES.
READ WARNINGS
©COPYRIGHT 2012 MET-PRO CORPORATION, DEAN PUMP DEAN PUMP ®IS A REGISTERED TRADEMARK OF MET-PRO CORPORATION. 09-5923 512
DEAN PUMP® SERIES DL200/DL230

TABLE OF CONTENTS
Mechanical Design Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Pro uct Inspection an Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Pro uct Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Receiving Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Application an Reapplication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Pump Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..4
Suction an Discharge Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Pump Cooling Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Stuffing Box Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Cooling Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Cooling Water Flow Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Motor Bearing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Starting the Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Filling the Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Operating the Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Pump Start-Up Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Or ering Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
DL200 SERIES PUMPS
Pump Section Views, Type Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Explo e View an Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Disassembly an Assembly Proce ures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
DL230 SERIES PUMPS
Pump Section Views, Type Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Explo e View an Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Disassembly an Assembly Proce ures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
DL200 AND DL230
Installation an Maintenance of Stuffing Box Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Purpose of Lantern Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Internal Seal Connection to the Lantern Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
External Seal Connection to the Lantern Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Lantern Ring Not Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Packing Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Usual Causes of Packing Failure an Excessive Stuffing Box Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Installation of Stan ar Mechanical Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Single Insi e Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Single Outsi e Unbalance Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Double Insi e Unbalance Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
19
Referring to the mechanical seal rawing, etermine the proper
“D” (or setting) imension for the seal an pump type. Measure
carefully from the mark which you have ma e on the shaft
sleeve an make a new mark on the shaft sleeve, towar s the
bearing housing, exactly to this imension. Remove the burr if
necessary. This mark is the seal setting mark.
Some seals have measurable imensions that will allow setting
without using the shaft scribing metho . If such is the case, the
seal rawing will so in icate.
Put the mechanical seal rotary unit on the shaft an sli e it back
against the flinger. Assemble the seal insert gasket (326), the
mechanical seal insert (315), an seal insert gasket (325) to
the face of the stuffing box an , placing the glan (300) in
position, pull own the glan stu nuts evenly to approximately
20 foot poun s of torque. Make sure that the lappe face of
the seal insert is towar s the rotary unit. Reassemble the pump.
Now carefully sli e the rotary unit against the seal insert,
compress the rotary unit an set it to the mark on the shaft
sleeve an lock the rotary unit tightly in place with the set
screws. Be careful not to cock the rotary unit.
Before starting the pump, blee the air from the stuffing box.
The stuffing box must be full of liqui or the seal faces may
be amage by lack of lubrication when the pump is starte .
Occasionally a seal may leak very slightly when the pump is
first starte . If the leakage continues more than a few moments
the pump shoul be shut own an the seal remove to
iscover the cause.
INSTALLATION OF DOUBLE INSIDE
UNBALANCED SEALS
To make seal installation, with the pump partially assemble
as note above, scribe a mark on the shaft sleeve (10) exactly
in line with the face of the pump stuffing box. The impeller (3),
an backhea (22) are now remove from the pump. If this
marking or subsequent marking causes roughness on the shaft
sleeve remove the burr carefully with crocus cloth. Any rough-
ness on the shaft sleeve may amage the mechanical seal shaft
packing when the seal is assemble .
Referring to the mechanical seal rawing, etermine the two
“D” (or setting) imensions for the two rotary units. Be sure to
etermine those for the particular pump type. Measure careful-
ly from the mark which you have ma e on the shaft sleeve an
make two new marks on the shaft sleeve, towar s the pump
en , exactly to these imensions.
Double seal stationary inserts are of two types epen ing on the
service con itions of the pump. The insert may be of rectangular
cross section groove for an o-ring or the insert may be of
L-shape cross-section use with a Teflon mounting ring.
To position the o-ring mounte insert, lubricate the insi e of the
stuffing box an the insi e of the mechanical seal glan . Place
the o-rings in the grooves an carefully sli e the inserts into
position in the stuffing box an seal glan . Be most careful not
to amage the o-ring.
To position the Teflon mounte insert, lubricate the insi e of
the stuffing box an the insi e of the seal glan . Carefully
sli e the Teflon mounting rings into position an then sli e the
stationary inserts into place. The slots (or pins) in the stationary
inserts must in ex with the rive pins (or slots) in the glan
an stuffing box.
Put the mechanical seal glan with insert installe , on the
pump shaft sleeve an sli e it back against the flinger. Put the
seal glan gasket on the sleeve an sli e it back against the
glan . Sli e one seal rotary unit on the sleeve with the carbon
face towar s the bearing housing. Be careful not to amage
the seal shaft packing. Be sure that the shaft sleeve hook is
firmly against the shoul er on the shaft. Set the rotary unit
carefully to its setting mark on the shaft sleeve an lock it
tightly in place with the set screws. Sli e the secon rotary
unit onto the shaft sleeve with the carbon face away from the
bearing housing. Set it carefully to its setting mark an lock it
tightly in place. Recheck both rotary settings an correct if
necessary. Sli e the pump backhea very carefully in place
over the seals. Sli e the glan gasket an seal glan into
place an carefully an evenly tighten the glan stu nuts.
Do not cock the glan . The pump may now be reassemble .
Double seals require a liqui in the stuffing box between the
seal inserts to provi e lubrication. This barrier liqui must be
supplie at a pressure of 10 to 15 psi above stuffing box throat
pressure to activate the inboar seal. Before starting the pump,
be sure that the stuffing box is full of this lubrication an that all
supply lines for this liqui are in place an in operation.
Leakage from the outboar seal can be easily spotte . Leakage
through the inboar seal can be etecte only by the loss of
the barrier (lubricating) liqui from between the seals. If leak-
age occurs, the pump must be isassemble an the cause of
leakage etermine .
If you do not hav th corr ct m chanical s al drawing, writ to th Factory giving compl t information on pump siz , typ , and
s rial numb r and th corr ct s al drawing will b s nt to you.

INSTALLATION OF STANDARD MECHANICAL SEALS
FOR PUMP TYPES DL201, DL202, DL231 and DL232
Clean, careful, an correct installation of the mechanical seal
is essential to successful mechanical seal operation. Cleanliness
an accuracy of setting cannot be overemphasize .
For instructions on pump isassembly an assembly see the
instruction manual relating to the specific pump type.
A correct mechanical seal rawing is furnishe with each
pump an the mechanical seal setting imension is given on
this rawing.
Use the setting for the specific pump type in which the installa-
tion is being ma e.
The pump is first assemble accor ing to the applicable assem-
bly instructions through the step of proper impeller a justment.
The mechanical seal rotary unit must be properly locate in
relation to the face of the pump stuffing box in or er to estab-
lish the proper seal spring tension an resultant proper force
on the seal faces. An error in setting of more than several thou-
san ths may well cause seal failure by excessive or insufficient
seal face pressure.
INSTALLATION OF SINGLE INSIDE SEALS
To make seal installation, with the pump partially assemble as
note above, scribe a mark on the shaft sleeve (10) exactly in
line with the face of the pump stuffing box. (Note 1). The
impeller (3), an backhea (22) are now remove from the
pump. If the mark causes roughness on the shaft sleeve remove
the burr carefully with crocus cloth. Any roughness on the shaft
sleeve may amage the mechanical seal shaft packing when
the seal is assemble .
Referring to the mechanical seal rawing, etermine the proper
“D” (or setting) imension for the seal an pump type.
Measure carefully from the mark which you have ma e on the
shaft sleeve an make a new mark on the shaft sleeve, towar s
the pump en , exactly to this imension.
If the mechanical seal insert is of the clampe -in style, put the
mechanical seal glan (300) on the pump shaft an sli e it
back against the flinger. Put one mechanical seal glan insert
gasket (325), the glan insert (315) an the other glan insert
gasket (326) on the shaft. Make sure that the lappe face of
the glan insert is towar s the stuffing box.
Flexibly mounte inserts are of two types, epen ing on the
service of the pump. The insert may be of rectangular cross
section groove for an “O” ring or it may be of L-shape cross-
section use with a Teflon mounting ring.
To position the “O” ring mounte insert, lubricate the insi e of
the mechanical seal glan . Place the “O” ring in the groove of
the insert an carefully sli e the insert into position. Be careful
not to amage the “O” ring. Make sure that the lappe face of
the insert faces towar s the pump.
To position the Teflon mounte insert, lubricate the insi e of the
mechanical seal glan . Carefully sli e the Teflon mounting ring
into position in the glan an then sli e the insert into place.
The slot (or pin) in the stationary insert must in ex with the
rive pin (or slot) in the glan .
Put the mechanical seal glan an insert on the shaft an sli e
it back against the flinger. Be careful not to amage the insert
or its mounting. Put the glan gasket (324) on the shaft. Sli e
the seal rotary unit assembly carefully onto the shaft sleeve
being particularly careful not to amage the seal shaft packing
(345). Be sure that the shaft sleeve hook is firmly against the
shoul er on the shaft. Set the rotary unit carefully to the setting
mark you have ma e on the shaft sleeve an lock it tightly in
place with the set screws. Recheck the setting. Sli e the pump
backhea carefully into place an gui e the seal glan insert
an gaskets together with the glan carefully into position.
Reassemble the pump. Now tighten the glan stu nuts careful-
ly an evenly to avoi cocking the glan , making sure that the
glan insert an gaskets are in place.
Before starting the pump, blee the air from the stuffing box.
The stuffing box must be full of liqui or the seal faces may be
amage by lack of lubrication when the pump is starte .
Occasionally a seal may leak very slightly when the pump is
first starte . If the leakage continues more than a few moments
the pump shoul be shut own an the seal remove to iscov-
er the cause.
NOTE 1 — Pumps using a single insi e balance seal
(except metal bellows) are furnishe with a short shaft
sleeve. The mark is ma e on the shaft because the sleeve
oes not exten to this point. The secon mark (setting mark)
is ma e on the shaft sleeve an measure from the mark on
the shaft.
INSTALLATION OF SINGLE OUTSIDE
UNBALANCED SEALS
If the seal rotary unit is scribe with a setting mark, the shaft mark-
ing proce ure outline below may be omitte . The setting mark can
be foun on the outer shell of the rotary unit running circumferential-
ly between the four roun holes in the shell.
Visible through each hole is the e ge of the metal isc against
which the seal springs bear. To set the seal with the proper spring
pressure, first assemble the pump as note below with the seal
rotary unit sli back against the shaft flinger an left loose until the
entire bearing housing-impeller assembly is bolte in place in the
pump casing. Then sli e the seal rotary unit into place against the
stationary insert an compress the springs until the metal isc visible
through the holes is aligne with the setting mark scribe on the
shell. Tighten the set screws an check through each hole to eter-
mine that the seal rotary unit is correctly compresse an not
cocke .
If the seal rotary unit is not marke with a setting line, a setting
mark must be ma e on the shaft sleeve. To make the seal installa-
tion, with the pump partially assemble as note above, scribe a
mark on the shaft sleeve (10) exactly in line with the face of the
pump stuffing box. The impeller (3), an backhea (22) are now
remove from the pump. If the mark causes roughness on the shaft
sleeve remove the burr carefully with crocus cloth. Any roughness
on the shaft sleeve may amage the mechanical seal shaft packing
when the seal is assemble .
MECHANICAL DESIGN SPECIFICATIONS
Direction of Rotation from Motor En . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CW
Bearings in Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Ball Type
Bearing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Grease
Casing Thickness, Minimum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5/16"
Flanges — ASME/ANSI Rating:
Ductile Iron (CL 22), 316 S/S (CL 50) . . . . . . . . . . . . . . . . . . .Class 150
Facing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .FF
Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125 Ra
Impeller Balance . . . . . . . . . . . . . . . . . . . . . . . .Single Plane Dynamic Balance
Allowable Pump Suction Pressure (2 year min. thrust bearing life) . . . . .100 psig
Stuffing Box Jacket Pressure, Maximum . . . . . . . . . . . . . . . . . . . . . . .125 psig
STANDARD MATERIALS OF CONSTRUCTION
Part No. Part Nam Class 22 Class 50
3 Impeller C.I. (1) 316 S/S (10)
5 Casing D.I. (5) 316 S/S (10)
* 5D Casing Cap Screw Steel (11)
7 A apter Cra le Cast Iron (1)
7G A apter Cra le Cap Screw Steel (4)
* 10† Shaft Sleeve 316 S/S (2)
* 10A Shaft Packing Stan ar Sets
* 10K † Shaft Sleeve Key (DL231, DL232 only) Steel (4) 316 S/S (2)
* 13 † Glan Steel (3) 316 S/S (10)
* Denotes DL200 Series parts interchangeable with pH200 Series Pumps, an DL230 Series parts interchangeable with pH230 Series Pumps.
† Denotes part interchangeable within DL200 Series Pumps, or within DL230 Series Pumps.
NOTE: MECHANICAL SEAL MATERIALS: Please refer to specific seal rawing.
MATERIAL SPECIFICATIONS
(1) Cast Iron (4) AISI 1020 (9) TM E.I. u Pont e Nemours & Co.
(2) AISI 316 S/S (5) Ductile Iron ASTM A395 (10) 316 S/S – ASTM #A744, Gra e CF-8M
(3) Cast Steel – ASTM #216, (6) ASTM A193, Gra e B7 (11) ASTM A449
Gra e WCB (7) ASTM A194, Gra e 2
Specifications are subject to change without notice
Part No. Part Nam Class 22 Class 50
* 14 † Glan Stu AISI 304
* 15 † Glan Stu Nut AISI 304
17 † Lantern Ring Teflon (9)
* 18 † Splash Collar Ca mium Plate Steel
* 22 Backhea Steel (3) 316 S/S (10)
* 22A † Backhea In exing Cap Screw Steel (4)
* 37 † Clearance Shim Steel
* 77 † Casing Gasket Teflon (9)
* 77A † Impeller Gasket Teflon (9)
DL201 DL231
DL202 DL232
Horsepower Rating — max. rate
Driver HP not to excee @ 1750 rpm 71
/2HP 50 HP
@ 3500 rpm 15 HP 100 HP
Max. Hy rostatic Test Pressure
Ductile Iron (CL 22), an 316 S/S (CL 50) 430 psig 430 psig
Shaft Packing
Size (square) 5/16"3/8"
Rings with Lantern Ring 55
Spacing 2-R-3 2-R-3
Rings without Lantern Ring 67
Stuffing Box Dimensions
Length ( epth) 21
/8"2
3/4"
Insi e Diameter (bore ia.) 15/8"2
1
/2"
Shaft Sleeve Diameter 1" 13/4"
Lantern Glan Wi th 7/16"5/8"
Distance Lantern Glan to Open En 13/8"1
3/4"
of Stuffing Box
STANDARD, INLINE, SINGLE STAGE, OPEN IMPELLER, CENTRIFUGAL PROCESS PUMPS
TYPES DL201, DL202; DL231, DL232
SERIES DL200/DL230
CENTRIFUGAL PROCESS PUMPS
ALLOWABLE WORKING PRESSURE
VS. PUMPING TEMPERATURE
All mechanically seale pumps contain a seal face flushing connection in the
glan an internal seal circulating piping as stan ar .
All mechanically seale DL202 an DL232 pumps use with cooling jackets
require a Min-Flo Bushing.
1 18
[phone] • E-mail:[email protected]
A

PACKING INSTALLATION
These instructions apply to the conventional woven, brai e ,
fol e , an wrappe packings. Packings of multifilament
Teflon, brai e carbon filament, compresse carbon sheet,
an other special types or materials may require special
installation techniques.
The way in which the packing is installe in the stuffing box is
important to the goo service life of the packing an the shaft
sleeve. Incorrect installation will lea to excessive leakage an
may cause high power requirements.
The use of a packing tamper (split bushing) is recommen e
to properly seat the packing rings. Such a tool is easily ma e
from woo or metal in the form of a hollow cylin er. The
insi e iameter must be slightly larger than the shaft sleeve
an the outsi e slightly smaller than the stuffing box bore. split
the piece lengthwise to allow insertion in the stuffing box.
More than one length of packing tamper may be necessary.
Suit the lengths to the particular pump.
All packing rings furnishe by Dean Pump Division are
ie-mol e to fit the stuffing box. To place a ring on the shaft
sleeve, open the ring at the split at a right angle to the plane
of the ring. This will best retain the mol e form an avoi
istortion. Successive rings shoul be installe with the joints
at 90° intervals.
Foil wrappe packings must be installe with the foil laps run-
ning in the irection of shaft sleeve rotation on the insi e of the
ring. Metallic packing shoul be lubricate , on the wearing
face only, with a ry graphite lubricant before insertion.
Foil wrappe packing sets are furnishe with soft rings of
packing which are place between the har metallic rings in
the locations shown in the iagrams. These rings help to fur-
nish lubrication uring run-in perio . Being soft, they are more
sensitive to compression loa s an care must be taken uring
the a justment perio .
Follow these steps:
1) With the packing glan sli back against the flinger,
or remove if it is a two piece glan , place a ring of
packing on the shaft sleeve an enter it carefully into
the stuffing box. Insert the halves of the packing tamper
an push the packing ring to the bottom of the stuffing
box. Sli e the packing glan up against the en of the
packing tamper with the glan stu s in exe in the
glan holes, put on the glan stu nuts an tighten them
firmly an evenly to seat the packing ring.
2) Back off the glan , remove the packing tamper, an
insert a secon ring of packing, staggering the ring
joint 90° from that in the first ring. Repeat the seating
proce ure above.
3) If a lantern ring is to be use , check the pump
specifications to etermine its position in relation to
the number of rings between the bottom of the stuffing
box an the lantern ring. Insert packing rings as above
until the lantern ring position is reache an then
install the lantern ring.
4) If no lantern ring is to be use , or after the lantern ring is
put in place, continue to a packing rings, one at a
time, staggering joints at 90° intervals, until the stuffing
box is nearly full.
5) Put the packing glan in place an pull up the glan
stu nuts firmly. Back the glan stu nuts off to finger
tightness.
6) Rotate the pump shaft by han to be sure it is not locke .
7) Final adjustm nt of th packing compr ssion must b
mad with th pump running. Start an stop the pump
several times to begin the running-in perio . Allow
sufficient leakage to assume goo lubrication uring the
a justment. Pull up the glan stu nuts 1/8 turn at a
time. Allow a running-in perio between a justments.
Continue a justment until the esire leakage control is
reache . The minimum leakage rate epen s on a num-
ber of things: liqui pumpe , packing use , temperature,
stuffing box pressure, an the con ition of the pump. In
any case, some leakage is necessary to both lubricate
an cool the packing. Minimum rates may vary from a
few rops per minute to as much as 1/2 pint per minute.
8) As the packing wears in service, the glan shoul be
rea juste to maintain the minimum leakage.
9) After the glan has been taken up to full travel, an a i-
tional ring of packing may be place in the stuffing box.
When the glan has again been taken up to full travel
the stuffing box shoul be repacke completely.
USUAL CAUSES OF PACKING FAILURE AND
EXCESSIVE STUFFING BOX LEAKAGE
1) Packing has not been installe properly.
2) Packing use is not suitable for the temperature an
pressure involve or may be subject to attack by liqui
han le .
3) Inner rings are not thoroughly seate in the stuffing box
so that outer rings are carrying all the loa .
4) Dirt an foreign particles in stuffing box are causing
rapi scoring of shaft sleeve.
5) Stuffing box cooling water not turne on.
6) Packing glan pulle up too tight.
When or ering a itional packing sets, always refer to packing
set number an to pump serial number.
17 2
PRODUCT INSPECTION AND TEST
The Pro ucts of Dean Pump Division are subject to thorough an
rigorous quality control an inspection proce ures throughout the
whole of the manufacturing process to assure proper operation in
full conformity with establishe performance stan ar s. On
completion of inspection, each unit is oile , seale against the
entrance of irt, an tagge with a signe certificate of
inspection prior to shipment. Each pump when shippe is rea y
to perform the service for which it was esigne with minimum
maintenance an expense if properly installe an operate in
accor ance with the instructions furnishe .
DEAN PRODUCT WARRANTY
We warrant to the purchaser from us of Dean Pump pro ucts
an parts of our own manufacture (Dean Pro ucts) that the
Dean Pro ucts are free “un er rate use an service” from
efects in esign, material an workmanship for a perio of
one (1) year from the ate of installation, but not to excee
eighteen (18) months from the ate of shipment by us. This war-
ranty oes not cover (I) any loss or amage resulting from
wear, corrosion, abrasion or eterioration ue to normal use
in rate service; (II) replacement of service items such as shaft
packings, an mechanical seals; (III) pro ucts or parts
manufacture by others but furnishe by us which, if efective,
shall be repaire or replace only to the extent of the original
manufacturer‘s warranty; (IV) any loss or amage to or efects
in any Dean Pro ucts resulting from the misuse or improper
storage, installation, or operation thereof; or (V) any loss or
amages to or efects in any Dean Pro ucts resulting from any
alteration or mo ification thereof not expressly authorize an
approve by us in writing. We shall not be liable, irectly
or in irectly, un er any circumstances for consequential or
inci ental amages, inclu ing, but not limite , to: (I) any
loss of business or profits; an (II) labor, material or other
charges, claims, losses or amages incurre or suffere from,
in connection with or in consequence of the working upon,
alteration, or repair of any efective Dean Pro ucts by persons
or firms other than us. Our liability for breach of warranty
hereun er is limite solely to the repair in our factory or the
replacement F.O.B. our factory, as the case may be, of any
Dean Pro ucts which shall have been etermine by us, after
notice to us an inspection by us within the warranty perio ,
to be so efective when shippe by us.
THIS WARRANTY AND THE LIABILITY SET FORTH HEREIN ARE
EXCLUSIVE AND IN LIEU OF ALL OTHER LIABILITIES AND
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
PARTICULAR PURPOSE.
WARNING
Rea the instruction manual completely before installing, filling,
operating, or maintaining this equipment.
Obtain, rea an hee the MSDS (Material Safety Data Sheet)
for the flui s being han le before attempting to fill, operate or
maintain this equipment. Obtain instructions from the Safety
Engineer responsible for your facility before performing any
work on the pumping equipment an systems.
Proper storage while not in use an proper installation an
start-up are essential for successful pump operation. Misuse or
improper storage, installation or operation of pumps may result
in serious loss or amage. Dean Pump Division is not responsible
for any loss or amage resulting from causes beyon its
control, an is not liable for charges for work performe or
materials furnishe to repair such loss or amage.
All installation, op ration, and maint nanc must b don by
thoroughly qualifi d p rsonn l in strict accordanc with this
manual and must comply with all local, stat and F d ral
cod s. Only D an authoriz d s rvic parts must b us d in
th r pair of th s pumps.
RECEIVING PUMP
Wh n th pump is r c iv d from th transportation company,
it should b promptly insp ct d for damag and such damag
not d on th bill of lading b for it is sign d. Claims for
shipping damag must b fil d against th carri r.
Car must b x rcis d in unloading and handling th pump.
STORAGE
Pumps must be properly covere an protecte against
moisture, irt, an physical amage uring storage prior to
installation an operation.
If prolonge storage is anticipate , o the following:
1) Seal the suction opening of the pump with a blin flange,
gasket, an bolts.
2) Position the pump on its si e so that the motor shaft is hori-
zontal, the suction flange is own, an the ischarge
flange is up.
3) Fill through the ischarge opening of the pump a corrosion
inhibiting liqui that is also compatible with the liqui that
will later be pumpe . Evaluation of compatibility must
inclu e consi eration of the temperature at which the sys-
tem will later operate. Be sure to also vent air from any
auxiliary piping connection to the pump an fill it with the
same inhibitor.
HAZARDOUS SITUATIONS MAY OCCUR UNLESS THIS EQUIPMENT IS APPLIED, INSTALLED, OPERATED, AND MAINTAINED BY THOR-
OUGHLY QUALIFIED PERSONNEL IN STRICT ACCORDANCE WITH THE INSTRUCTION MANUAL AND ALL APPLICABLE DRAWINGS
AND CODES.

3 16
INSTALLATION AND MAINTENANCE OF STUFFING BOX PACKING
The proper installation an maintenance of packing to seal a
pump shaft is not ifficult but must be properly one to provi e
goo packing an pump shaft sleeve life. All packing must be
allowe to leak. This leakage is the only lubrication for the
packing an a itionally provi es cooling to remove part of
the frictional heat built up between the shaft sleeve an the
packing. Failure to allow sufficient leakage will result in short
packing an shaft sleeve life an increase power consump-
tion of the pumping unit. It is entirely possible to stall a
centrifugal pump by clamping the packing glan own.
Most Dean pumps are shippe from the factory without
packing in the stuffing box. A complete set of ie mol e
packing specifie for the service is shippe with the pump
in a separately labele carton. The pump stuffing box must
be properly packe before the pump is put into service.
The stuffing box may be packe either with or without a
lantern ring (also known as a seal cage or lantern glan ) as
the service of the pump ictates. When the pump suction
pressure is above 100 psig a lantern ring is not recommen e .
PURPOSE OF LANTERN RING
Lantern rings are ma e of Teflon or suitable metal as the ser-
vice eman s. They are of split construction an may be easily
installe or remove without isassembling the pump. A lantern
ring is use in the stuffing box with packing for these reasons:
1) To permit the intro uction of a sealing liqui into the
stuffing box to prevent leakage of air into the pump
through the packing when the pump suction pressure is
less than atmospheric pressure. The sealing liqui may
be from an internal seal connection or from an external
source.
2) To permit intro uction of grease, oil, or other suitable
lubricant to the packing to provi e lubrication or cooling.
INTERNAL SEAL CONNECTION
TO THE LANTERN RING
An internal seal connection is use to inject pumpage from
the pump casing into the lantern ring through the lantern ring
connection of the stuffing box to seal the pump against air
leakage as note above. It can be use only when the pumpe
liqui is clean an non-abrasive.
Th pump d liquid introduc d through th int rnal s al conn ction
to th lant rn ring will not s al th pump against air l akag
through th packing wh n th pump is idl or on stand-by s rvic .
EXTERNAL SEAL CONNECTION
TO THE LANTERN RING
The sealing liqui intro uce to the lantern ring may be from a
source external to the pump. It must be intro uce at a pres-
sure above stuffing box pressure an must be non-corrosive,
non-abrasive an a equately cool. The connection is ma e to
the lantern ring connection on the pump stuffing box.
The lantern ring connection on the pump stuffing box is also
use to intro uce grease, oil, or other suitable lubricants to the
lantern ring.
LANTERN RING NOT USED
When the pump suction pressure is above atmospheric pres-
sure or the stuffing box is pressure seale (no impeller balance
holes) an neither internal nor external liqui or lubricant is
require to the packing, the lantern ring is not use an the
stuffing box is packe full with rings of packing.
PACKED STUFFING BOX WITHOUT LANTERN RING
PACKED STUFFING BOX WITH LANTERN RING
4) When the pump is completely fille , seal the ischarge
opening with a blin flange, gasket, an bolts.
5) Apply a heavy protective coating to any expose metal
surfaces. A rust preventative must be use to protect all
steel an iron parts.
6) Rotate the motor shaft “by han ” each month. Wear heavy
gloves when rotating the shaft, to protect your han s. It
will most likely be necessary to remove the motor fan
cover to gain access to the motor fan to rotate the shaft.
When you are rea y to place the pump in service:
1) Drain the storage liqui from the pump an any auxiliary
piping. Draining can be through the casing rain connec-
tion, the auxiliary piping, the suction flange connection,
an the ischarge flange connection.
2) Remove an iscar the blin suction flange, gasket, an
bolts. Remove an iscar the blin ischarge flange,
gasket, an bolts.
3) Flush all remains of the storage liqui from the pump an
the auxiliary piping. Use a flush liqui that is compatible
with the liqui to be pumpe . Evaluation of compatibility
must inclu e consi eration of the temperature at which the
system will later operate.
4) Discar the storage liqui an the flush liqui . Be sure to
comply with governmental regulations in any isposal.
WARNING:
B sur that th r is nothing r maining in th pump or piping
that could r act with th liquid that will b pump d or that
would hav an xc ssiv vapor pr ssur at th syst m op rat-
ing t mp ratur . For xampl , solv nt r sidu l ft in th pump,
wh n xpos d to th op rating t mp ratur of th syst m,
could cr at a vapor pr ssur in xc ss of th capability of th
syst m to r tain it, th r for causing an xplosion that could
prov fatal.
5) Replace all pipe plugs an tighten them. Tighten any an all
auxiliary piping connections that may have been loosene .
6) Remove the “storage” protective coatings from the external
surfaces of the pump.
Pumps must also be protecte from moisture, irt, an physical
amage, uring an after installation while the system is being
complete . Pumps “store ” as installe in the piping system
must be completely checke for proper installation prior to
start-up.

Always wear the appropriate protective apparel when working
on or aroun the pumping equipment. Safety glasses with si e
shiel s, heavy work gloves (use insulate work gloves when
han ling hot items), steel-toe shoes, har hat, an any other
protective gear as nee e for protection. One example of
other gear woul be breathing apparatus when working near
toxic materials. Use lifting evices, manufacture expressly for
the purpose of lifting, to move the pumping machinery. Do not
attempt to lift the assembly or its components manually. Use
only evices with lifting capabilities in excess of the weight of
the unit being lifte . Inspect straps, chains, hooks, etc. for
amage an lifting capability before use. Lift only at the center
of gravity.
Personal injury, eath, an /or equipment amage coul occur
if goo lifting practices are not use .
APPLICATION AND REAPPLICATION
At the time of installation, the equipment receive shoul have
alrea y been selecte for the service require . You must rea
the paperwork for the installation an check the serial number
of the pump to assure that you are installing the correct pump
into the service for which it was selecte .
Many pumps look i entical from the outsi e but can be ma e
of ifferent materials an /or be constructe ifferently insi e.
Personal injury, eath, equipment amage, pro uct (pumpage)
amage, an /or pro uct loss coul occur if the incorrect pump
is installe .
Do not transfer an existing pump to any other service con itions
until you have thoroughly reviewe the pump construction, materi-
als, sizing, sealing, pressure containing capability, hea /capacity
capability, an temperature capability with respect to the require
service. Consult your Dean Pump sales engineer with all the ser-
vice requirements an a full escription of the existing pump
(inclu ing the serial number), seal, an sub-systems so that we can
assist you in a successful reapplication.
PUMP MOUNTING
It is recommen e that DL200 Series an DL230 Series pumps
be mounte with the motor vertically upright. Other positions
are possible if a equate support is provi e .
A pump support base for vertically upright mounting is
require in accor ance with this tabulation:
Pump Siz Us Bas Abov HP
1 x 11/2x 6 DL200 Series Base not require
11/2x 3 x 6 DL200 Series Base not require
All DL230 Series 15
When a pump support base is not use , a equate pipe sup-
ports must be provi e for the piping at locations close on
either si e of the pump.
The foun ation for the pump support base nee not be elabo-
rate. Four hol own bolt holes are provi e in each base an
the foun ation shoul inclu e four stu s to match these holes.
The support base shoul be seate in a thin layer of grout to
assure even support.
SUCTION AND DISCHARGE PIPING
Suction an ischarge nozzle sizes of Dean pumps are select-
e for proper performance of the pumping unit an are not
inten e to etermine the suction an ischarge pipe sizes.
Pipe sizes must be etermine by the user base on the system
requirements.
Suction piping shoul have a minimum friction loss an thus
shoul be as short an straight as possible with a pipe iame-
ter as large as economically feasible for the flow rate han le .
Suction piping shoul never be smaller in iameter than the
suction nozzle size. When the suction piping is larger than the
suction nozzle size an eccentric re ucer is require at the
suction flange an must be installe with the taper locate on
the un ersi e to eliminate air or vapor pockets. The section of
piping attache to the suction flange of the pump shoul be
straight for a length of eight pipe iameters or more.
Discharge piping may be the same size as, larger, or smaller
than the ischarge nozzle as the system flow may eman .
In new installations or rebuilt systems, irt, pipe scale, wel ing
slag an general construction ebris may get into the piping. It
is important to prevent this material from entering the pump
an amaging pump parts, mechanical seal faces, or stuffing
box packing. Mechanical seal parts are especially subject to
amage even by very small particles. To prevent amage, a
strainer or filter installe in the suction line is recommen e .
Commercially available strainers or filters as recommen e by
their manufacturers can o an excellent job. In a ition,
special filtering an mechanical seal flushing guar s may be
require . Consult your Dean representative. Suction line
screens or strainers may usually be remove when, after
several ays of use, no irt has been collecte an the system
is clean.
Remember that screens an filters in the suction line are restrict-
ing evices which re uce the net positive suction hea (NPSH)
available to the pump an shoul be consi ere at the time the
system is esigne .
Install “new” gaskets, of the correct material for the service,
an the correct size per ASME B16.20 or ASME B16.21 at
the suction an the ischarge flanges of the pump. Use only
new gaskets. Connect the suction an ischarge piping without
forcing the piping into position. The pipe flanges must line up
with the pump flanges ”freely”.
INSTALLATION
TYPICAL PUMP PIPING
15 4
cra le (7). A new set of clearance shims together with the
new impeller an casing gaskets shoul be on han to use
as nee e in the reassembly. Tighten the a apter cra le cap
screws (7G) to the following torque value.
1/2" cap screws - torque to 45 ft. lb.
5/8" cap screws - torque to 70 ft. lb.
Using a feeler gauge, check the clearance between the
impeller (3) an the backhea (22). This clearance shoul
be 0.009" to 0.013", if not, a or remove shims to obtain
this clearance.
f) If the pump is to be fitte with a mechanical seal, see
”Installation of Stan ar Mechanical Seals,“ page 18, for
etaile instructions.
g) If the pump is to be fitte with stuffing box packing, remove
the impeller (3) an backhea (22). Sli e the glan (13)
over the shaft an back against the splash collar (18).
h) Put the backhea (22) in place an secure with the back-
hea in exing cap screws (22A). Tighten the cap screws to
20 ft. lb.
i) Clean the impeller (3) threa s an the shaft threa s thor-
oughly. Spray the insi e threa s of the impeller an the shaft
threa s with Loctite Primer T an allow the primer to ry.
See instructions on the primer can. Apply Loctite Gra e AA
compoun to the insi e threa s of the impeller only until all
parts of the threa s are wet. Avoi getting the compoun on
the gasket recess in the impeller. Install the impeller gasket
Screw the impeller in place an tighten to 60 ft. lb.
Curing time of the Loctite Gra e AA compoun when use
with Loctite Primer T is about 30 minutes.
j) Rotate the motor shaft by turning the impeller (3) by han
(wear heavy gloves) to be certain that there is no internal
interference.
k) If the pump is to be packe , see “Installation an
Maintenance of Stuffing Box Packing” for proper proce ure.
l) The rotating assembly is now rea y to be returne to the
installation site for final assembly.
m) Place a new casing gasket (77) into the recess in the casing
(5). Use a mechanical lifting apparatus to lower the rotating
assembly into the casing (5). Install the casing cap screws
(5D) an tighten them to the following values.
1/2" cap screws - torque to 50 ft. lb.
5/8" cap screws - torque to 75 ft. lb.
n) Remove the motor fan cover an rotate the motor shaft by
turning the motor fan by han (wear heavy gloves) to be
certain that there is no internal interference. Replace the
motor fan cover an fasten it securely in place.
o) Reinstall all auxiliary piping, systems an equipment.
p) Check to see that all openings have been seale before
filling the pump with liqui .
q) Reconnect the electrical wiring an con uit.
r) Follow the instructions un er ”STARTING THE PUMP“ an
”PUMP START-UP CHECKLIST“.

Pumps may be furnishe with optional stuffing box jacket
an /or jackete mechanical seal glan , accor ing to the
pump service.
STUFFING BOX COOLING
Cooling is generally recommen e un er these con itions:
1) With a mechanical seal when the pumping temperature
is above 350°F. In ivi ual plant specifications may
require cooling above 250°F. Sp cific applications (such
as wat r) may r quir cooling at low r t mp ratur s.
2) With a mechanical seal when pumping liqui s of 0.75
specific gravity or less when the pumping temperature
permits further cooling.
3) With packing at temperatures above 250°F.
PUMP COOLING REQUIREMENTS
5 14
WARNING:
Strain caus d by “forcing”, improp r flang bolting, and/or
misalignm nt may caus failur of th pumping unit, flang s,
piping and/or fluid (pumpag ) r l as which could caus p rson-
al injury, d ath, and/or damag to this and/or oth r quipm nt.
Install a “new” bolt, of the correct size per ASME/ANSI B16.5
an the correct material per ASME/ANSI B16.5, in every bolt
hole. Tighten all bolts evenly. Use only new uncorro e fasteners.
Connect all other (auxiliary) piping necessary for safe an
successful operation of the equipment in the specific service
con itions of the application.
WARNING:
Mak sur that all piping is install into its corr ct conn ction.
Installation of a pip into an incorr ct location could r sult in an
xplosion and p rsonal injury or d ath as w ll as damag to this
and/or oth r quipm nt.
Install pr ssur r li f valv s in any caviti s that could b subj ct d
to pr ssur s in xc ss of th allowabl working pr ssur .
Explosion, p rsonal injury, d ath, and/or damag to this and/or
oth r quipm nt may occur if pr ssur xc ds allowabl .
JACKETED BACKHEAD CONNECTIONS - DL200 SERIES PUMPS JACKETED BACKHEAD CONNECTIONS - DL230 SERIES PUMPS
WARNING: Improper connection of cooling and or seal connection piping may
be dangerous and may seriously damage pump and system.
COOLING WATER PIPING
No cooling water piping is furnishe with the pump. The
customer must provi e the piping. The cooling inlet piping will
probably inclu e an isolation valve. The cooling outlet piping
must have a flow control valve an a pressure relief valve. The
pressure relief value must be installe between the pump an
the flow control (or isolation) valve. The pressure relief valve
must not be set any higher than 135 PSIG. The outlet piping
shoul lea to an open sight rain or through a suitable flow
metering evice.
COOLING WATER FLOW RATES
Stuffing box jacket cooling water flow rates are relate to
pumping temperature. A rate of 2 to 5 GPM is a visable, the
higher rate at the higher pumping temperature.
WARNING — EXTREME HAZARD TO PERSONNEL: Improp r
conn ction of cooling wat r piping may r sult in th inj ction
of cooling wat r into th pump stuffing box and into th
pumpag . D p nding on t mp ratur this may caus a viol nt
st am xplosion in th pump, piping, or associat d quipm nt
with xtr m hazard to p rsonn l. It may also caus s rious
contamination of th pumpag and h avy corrosion of pump
or quipm nt parts.
WARNING — EXTREME HAZARD TO PERSONNEL: Wh n
cooling wat r is us d to cool th pump, it is mandatory that
th cooling wat r b allow d to flow at any tim th pump is
running. Closing th inl t and/or outl t valv s und r running
conditions may r sult in th wat r in th jack ts r aching high
pr ssur which may l ad to th ruptur of a wat r jack t with
xtr m hazard to p rsonn l.
WARNING: Improper connection of cooling and or seal connection piping may
be dangerous and may seriously damage pump and system.
i) Remove the casing cap screws (5D) an using a mechanical
lifting apparatus lift the rotating unit from the casing (5).
j) Flush the wette parts, now expose , with a compatible,
non-toxic, non-hazar ous, stable liqui .
k) Remove the gasket from the face of the casing (5) or the cas-
ing back cover (22) epen ent on which one the gasket
may have a here to. Exercise care not to amage the
pump sealing surfaces. The type of gasket an material of
construction will vary with service requirements. Attack by
prying an then, if necessary, layering off the ol gasket
with a sharp scraper, attempting to remove it in the largest
possible pieces. Wear heavy leather, long sleeve work
gloves when using the scraper. Wet the gasket before an
uring the scraping operation to re uce the possibility of
fibers becoming airborne. Wear a respirator uring this
operation an until all ebris has been ispose of in a
plastic bag. Remove all of the gasket material own to clean
metal surfaces on both parts that contacte the gasket. Place
all of the gasket resi ue in a plastic bag, seal the bag an
ispose.
l) The casing back cover-impeller-motor assembly of the pump
can now be move to a more convenient location for further
isassembly. Use mechanical lifting equipment to move
assemblies an components.
DISASSEMBLY PROCEDURE
To further ismantle the pump, perform the following steps in the
sequence shown:
WARNING: Us only high quality tools.
Flush parts as disass mbl d to r mov hazardous r sidu from th
pumpag and/or sub-syst m fluids.
W ar prot ctiv quipm nt as advis d at th b ginning of this s ction.
Us m chanical lifting quipm nt to lift ass mbli s and compon nts.
Do not apply h at to parts to assist in disass mbly. Explosion could
occur causing p rsonal injury, d ath, and/or damag to quipm nt.
Do not att mpt to drill, saw or oth rwis cut parts to r mov th m.
Explosion and/or fuming could occur causing p rsonal injury,
d ath, and/or quipm nt damag .
Do not hamm r on any parts. P rsonal injury and/or damag to
quipm nt may occur.
The unit may be turne over an set on the motor to affor easy
access.
a) The shaft has two flats just in front of the flinger (18). Using
a wrench, the shaft shoul be hel as the impeller is
unscrewe . The impeller has a hex boss which may be fitte
with a wrench to ai in removal. The impeller threa is right
han e .
WARNING: H at is not to b appli d to th imp ll r (3) to
loos n it from th shaft (29). This is a pot ntially
hazardous proc dur and is to b avoid d.
b) Remove the glan stu nuts (15) an lower the glan
against the shaft flinger (18).
c) Remove packing from stuffing box if pump is packe .
) Remove the two backhea to spacer cra le cap screws
(22A) an lift out the backhea (22).
e) If the pump is fitte with a mechanical seal, loosen the set
screws an remove the seal rotary unit. Remove the seal sta-
tionary insert an the glan (13).
f) Remove the impeller gasket (77A) an shaft sleeve (10),
an shaft sleeve key (10K), from the pump shaft.
g) Take out the four cap screws (7G) securing the a apter
cra le to the motor an lift off the a apter cra le (7). The
impeller clearance a justing shims (37) shoul be save .
h) The splash collar (18) may be carefully prie off from its
press fit on the shaft.
i) Clean an inspect all parts.
The pump has now been isassemble to the components parts.
REASSEMBLY PROCEDURE
WARNING: Us only high quality tools.
W ar prot ctiv quipm nt as advis d at th b ginning of this s ction.
Us m chanical lifting quipm nt to lift ass mbli s and compon nts.
Do not hamm r on any parts. P rsonal injury and/or damag to
quipm nt may occur.
Do not att mpt to manufactur parts or modify D an Pump parts in
any mann r. D ath, p rsonal injury, and/or damag to quipm nt
may occur. R plac all gask ts, s als, b arings, and lubricants. Motor
b arings must b r plac d by a motor s rvic shop. R plac all parts
that hav worn, corrod d, rod d, or oth rwis d t riorat d.
Us only D an Pump Division of M t-Pro Corporation parts.
Reassemble the pump by reversing the steps escribe above. In
assembling the pump, using ol or new parts, be sure that no
foreign material, irt, or grime is left on the parts.
a) Clean all parts thoroughly.
b) Replace the splash collar (18) on the shaft an a just to a
close, no interference fit to the motor face.
c) Replace the a apter cra le (7) an screw the a apter
cra le cap screws (7G) into place, finger tight. Be sure no
irt or grit is between the faces.
) To etermine the impeller clearance an the thickness of the
shims (37) necessary in the reassembly, sli e the shaft sleeve
(10) an sleeve key (10K) into place. Put the backhea (22)
into position. Be sure no irt is between the mating faces.
Screw the impeller (3) on to the shaft firmly against the hook
en of the sleeve. With a feeler gauge, carefully measure
the minimum istance between the back of the impeller
vanes an the face of the backhea . Subtract .010 inches
from this measurement. The remain er is the thickness of the
a justing shims (37) require .
e) Loosen the four a apter cra le cap screws (7G) an insert
the necessary thickness of shims at each cap screw an
between the face of the motor an the back of the a apter

13 6
Pump motor bearings are properly lubricate for nominal service
con itions when the unit is shippe from the factory. The bearings
are of stan ar regreasable type an inlet an outlet channels
close with pipe plugs are provi e . To regrease the motor
bearings, remove the two pipe plugs for each bearing an insert
a grease fitting in the inlet hole. Use a low pressure grease gun
to inject the proper gra e of new grease. The grease cavity
shoul be fille no more than three fourths (3/4) full. Over-
lubrication may cause early bearing failure. Run the motor
until it has warme up an then remove the grease fitting an
replace the pipe plugs.
The proper grease lubricant epen s on the ambient temperature,
the pumping temperature, an the atmospheric contamination at
each pump installation. Specific lubricants, lubrication sche ule,
an lubrication instructions must be obtaine by the customer
from his local lubrication specialist.
In general, for reasonable ambient an contamination free
atmospheres, a high quality lithium #2 grease will usually give
satisfactory performance up to a pumping temperature of 350°F.
Above this, a high quality high temperature grease will be
require . The lubrication sche ule must be suite to the
particular installation.
MOTOR BEARING LUBRICATION
A centrifugal pump shoul be starte with the suction valve open
an the ischarge valve opene a slight amount.
It is important that a pump shoul never be subjecte to thermal or
pressure shock. The liqui shoul therefore be allowe to flow into
the casing slowly. A centrifugal pump shoul never be starte until
all the parts are up to the temperature of the liqui to be pumpe .
FILLING THE PUMP
WARNING: B for filling th pump with liquid, ch ck to s that all
possibl l ak locations ar s al d. S that th point wh r th
pump shaft nt rs th pr ssur containing cavity is s al d. This
s aling is accomplish d with a m chanical fac s al. S that all of
th conn ctions into th pr ssur containing cavity ar s al d or
conn ct d to a r lat d piping syst m that also has all possibl l ak
paths s al d. Us a wr nch on all bolt d joints to apply torqu to
assur that all gask ts ar s al d in a tight joint. Ch ck to s that
all thr ad d pip conn ctions ar also tight nough to s al th
liquid pr ssur that will b appli d wh n th syst m is start d.
When the source of liqui supplie to the pump is below atmos-
pheric pressure or locate below the pump, the pump must be
prime prior to start-up. The priming may be accomplishe in any
of several ways, three of which are liste .
1) An exhauster may be connecte to the ischarge piping
between the pump an the ischarge shut-off valve. With the
ischarge shut-off valve close an the suction valve open,
the air can be exhauste from the pump an piping.
2) With a foot valve installe in the suction piping, the pump
may be fille with liqui intro uce somewhere above the
pump in the ischarge line. The stuffing box shoul be
vente to allow complete filling. A foot valve may create
extensive losses an shoul be taken into consi eration in
calculating the available NPSH.
3) A vacuum pump (preferably a wet vacuum pump) may be
use for evacuating air from the pump an piping. The
vacuum pump shoul be connecte as is the exhauster
covere in No. 1.
When the source of liqui supplie to the pump is above atmos-
pheric pressure or above the pump centerline, the pump may be
fille by venting through a blee off line to atmosphere or back to
the pump suction source.
If the pump is equippe with cooling water piping this shoul be
turne on before filling the pump.
It is most important to ch ck th dir ction of rotation of th pump
b for allowing th pump to com up to sp d. To check rotation
irection, push the starting button an instantly push the stop button.
This will allow the motor to turn over a few revolutions an the
irection of the rotation to be observe . A irection of rotation
arrow is shown on the si e of the pump casing. If rotation is incor-
rect, change the wiring connections an recheck rotation.
Op rating
th pump in r v rs rotation will caus xt nsiv damag .
OPERATING THE PUMP
WARNING: B for starting th unit, s that all p rsonn l ar a saf
distanc away from all possibl hazards, that all sub-syst ms ar con-
n ct d and op rating, that all d bris has b n r mov d, and that th
pump is full of liquid.
Do not op rat this pump at shut-off (no-flow) as an xplosion may
r sult. This can occur with any liquid, v n “cold wat r”. P rsonal
injury, d ath, quipm nt damag , and/or loss of product (pumpag ) is
lik ly to occur. If your syst m is op rat d wh r it is possibl for all
outl ts of th discharg from th pump to b clos d whil th pump is
still op rating, a modification of th syst m n ds to b mad to
assur a continual flow of pumpag through th pump. NOTE: Som
p opl hav a b li f that a bypass lin from th discharg sid of th
pump to th suction sid of th pump will r li v this probl m, this is
“NOT TRUE”; DO NOT ATTEMPT THIS.
WARNING: Do not op rat a pump at a low flow condition, unl ss
provision has b n mad to pr v nt dang rous h at build up within
th pump casing. Th liquid in th pump will h at up and this may
r sult in high pr ssur in th pump in a short tim . Such pr ssur may
r sult in a ruptur of th pr ssur -containing parts and caus s v r
hazard to p rsonn l and/or damag to th syst m.
A c ntrifugal pump should n v r b run without liquid in th
casing. Ext nsiv damag may r sult, particularly to th
m chanical s al or stuffing box packing. V nt th pump s al
chamb r through th s al conn ction to provid lubrication to
th m chanical s al fac s.
When the pump is equippe with a mechanical seal, lubrication of
the mechanical seal faces must occur very quickly after start-up.
Unless special external flushing is employe or the pump is fitte
STARTING THE PUMP
WARNING: Work must b p rform d only by thoroughly train d
and qualifi d p rsonn l to assur quality r pair and to r duc th
possibiliti s of injury to p rsonn l and/or damag to quipm nt. If
you do not hav p rsonn l who ar capabl of saf quality r pair
of this quipm nt, w advis you to r turn th quipm nt to DEAN
PUMP to b r pair d.
Wh n it is n c ssary to op n th pump and/or th pumping
syst m, th fluid will b xpos d to th atmosph r and p rsonn l
in th ar a. For th saf ty of all involv d, th risk of xposur of
p rsonn l to th hazards of th pumpag can b r duc d by flush-
ing th ntir syst m with a compatibl , non-toxic, non-hazardous,
stabl liquid b for op ning th pump or th syst m. In all cas s,
wh r th syst m is flush d or not, us th utmost car around th
pumpag and th pumping syst m.
Always w ar th appropriat prot ctiv appar l wh n working on
or around th pumping quipm nt. Saf ty glass s with sid shi lds,
h avy work glov s (us insulat d work glov s wh n handling hot
it ms), st l-to d sho s, hard hat, and any oth r prot ctiv g ar as
n d d for prot ction. On xampl of oth r g ar would b br ath-
ing apparatus wh n working n ar toxic mat rials.
Us only top quality tools.
a) Stop the pump. Turn off the power supply (electricity, steam,
etc.) to the pump river (motor, turbine, engine, etc.) an
lock the switching evice so that it can not be restarte . Tag
the switching evice so that no one will attempt to restart the
unit.
b) Disconnect the electrical wiring an the con uit from the
electric motor at the con uit box of the motor. We strongly
suggest that you mark the motor lea s an the power supply
lea s to assure that they will be reconnecte in the same
way so that the motor rotation will be correct when the
pump is restarte .
c) Close the suction an ischarge valves completely to isolate
the pump from the system. Lock the valves in the close posi-
tion an tag them so that no one will attempt to open them.
) Turn off, lock out, an tag all sub-systems an auxiliary
equipment an auxiliary supply lines to isolate the pumping
unit from any an all power, energy, an /or flui s.
WARNING: Do not att mpt to p rform any work on th unit until
you ar confid nt that th pump and its cont nts hav b n
stabiliz d at ambi nt t mp ratur , and atmosph ric pr ssur .
Put on prot ctiv w ar to prot ct human tissu from attack by th
fluids contain d in th pump any sub-syst ms, and from any vapors
or fum s that could possibly b r l as d from th s fluids. This
could m an br athing apparatus fac shi lds, h avy long sl v
rubb r glov s, rubb r apron, hood, and possibly mor , d p nd nt,
of cours , on th prop rti s of th fluids involv d and th install d
drain and v nt piping arrang m nt. P rsonal injury and/or d ath
can occur if ad quat pr cautions ar not tak n with r gard to th
fluid, th installation and th possibiliti s of th r l as of fluid,
vapors, and/or fum s.
e) Carefully blee -off any pressure remaining in the pump.
Pressure remaining in the pump will be epen ent upon the
pressure in the system when the pump was stoppe ; the
quality, type, an con ition of the isolation valves; the ther-
mal expansion values of the liqui an the pump material;
an the change in the vapor pressure of the flui between
the temperature at the time the isolation valves were close
an the ambient temperature. Blee ing must be through a
valve rain line pipe to a close container mounte lower
than the pump. The container must be arrange with a relief
passage to some point where pressure an fumes will not
be harmful to personnel. The container must also have a
level evice so that etermination can be ma e that suffi-
cient flui has been raine to empty the pump cavity an
the volume of flui that was containe in the run of suction
an ischarge pipe between the isolation valves an the
pump. After the initial rush of flui from the pump relieves
the pressure, the rain valve can be opene further to spee
the raining operation. When flui quits running into the
rain tank, gauge the volume to see if it is sufficient to have
fully raine the contents of the pump an the suction an
ischarge pipes between the isolation valves.
f) Now rain any small piping, that contains the flui pumpe ,
from all low points into the same container use to rain the
pump. Do not rain any other flui s ( ifferent than the
pumpage) into this container as they may not be compati-
ble. Personal injury, eath, an /or equipment amage
coul occur.
WARNING: Ev n though it might app ar that th cavity b ing
drain d has compl t ly drain d, b xtr m ly car ful about op n-
ing th syst m and/or op ning th pump. If som thing solid in th
pumpag mov s to th vicinity of th drain conn ction, it could
s al-off th drain and maintain pr ssur in th cavity thought to
hav b n drain d. It is also possibl that th isolation valv s ar
not s aling and th r for allowing liquid to flow from th syst m
into th pump. P rsonal injury, d ath and/or quipm nt damag
may occur if gr at caution is not x rcis d.
g) Because of the above possibility, when you loosen the
gaskete joint at the back of the casing (5), loosen the
casing cap screws (5D) only one full turn, an then use jack
screws in the flange of the a apter cra le (7) to break the
gasket seal. If flui an /or pressure remains in the pump it
will spray out now. Use extreme caution, wearing protective
gear, to avoi injury. Do not procee with isassembly until
leakage ceases completely. If leakage oes not cease, the
isolation valves may not be sealing.
WARNING: Wh n you op n th pump, th fluid will b xpos d to
th atmosph r and p rsonn l in th ar a. For th saf ty of all
involv d, th risk of xposur can b r duc d by flushing th cavity
that was just drain d with a compatibl , non-toxic, non-hazardous,
stabl liquid, b for disass mbling th pump.
h) Remove any auxiliary piping that is attache to the pump.
DL230 SERIES PUMPS — DISASSEMBLY AND ASSEMBLY PROCEDURES
TYPES DL231 and DL232

7 12
with a ouble mechanical seal, a seal circulation line is furnishe .
When the pump is properly fille an starte , pumpage will flush
the seal faces an will also expel any air or vapors from the seal
chamber.
It is important that a pump shoul never be subjecte to thermal or
pressure shock. The liqui shoul therefore be allowe to flow into
the casing slowly. A centrifugal pump shoul never be starte until
all the parts are up to the temperature of the liqui to be pumpe .
A centrifugal pump shoul be starte with the suction valve open
an the ischarge valve opene a slight amount.
If rotation irection is correct an the pump properly fille with liq-
ui , it may now be starte .
After the pump is up to spee , the ischarge valve must be opene
slowly. A centrifugal pump shoul not be operate for any appre-
ciable time against a close ischarge valve since the liqui in the
casing will begin to heat up. During the first several minutes of
operating watch the pump carefully for overheating, vibration, an
other abnormal con itions. If trouble evelops, stop pump at once
an correct the problem.
Check these points carefully after pump installation an before
starting up the pump.
1) Rea instruction manual thoroughly an un erstan it.
2) Review pump or er or er acknowle gment sheet for the
service rating of the pump an any special features.
3) Check all piping connections, making certain that
connections are to the correct openings an that all
connections are tight.
4) If a pump support base is being use , make sure that it has
been installe properly.
5) Lock out, an tag, the electrical supply to the motor. Remove
the motor fan cover. Rotate the motor shaft, by han , to be
sure that there is no bin ing or rubbing within the pump or
the motor. Correct any ifficulties at once. Replace an
secure the motor fan cover.
6) Check to see that the motor bearings have been properly
lubricate .
7) Check the electrical connections to the motor. Unlock an
remove tag from the electrical supply to the motor.
8) If pump stuffing box is packe , check to be sure that glan
stu nuts are pulle up only finger tight an that the glan is
not cocke .
9) “Bump” the motor starting button to check motor rotation.
Operating the pump in reverse rotation may cause extensive
amage. If the rotation is not correct, lock out an tag the
electrical supply. Reconnect the wiring for proper rotation.
Unlock an remove tag from the electrical supply to the
motor. Go through the above proce ure again to check the
motor rotation.
10) Remove all irt, waste, tools, an construction ebris from
the area.
PUMP START-UP CHECKLIST
To avoi prolonge own time an facilitate rapi repair of
amage pump parts, Dean recommen s the pump user maintain
a minimum stock of spare parts. If the pump service is critical or the
pump parts are of special materials, a spare parts stock is even
more important to the user. Such a spares inventory may exten
from a spare mechanical seal or seal parts through complete back-
hea -impeller-motor assembly prepare for imme iate insertion into
the pump casing. Consult your Dean representative who will assist
you in selecting your spares stock.
ORDERING SPARE PARTS
Spare part or ers will be han le with a minimum elay if the
following information is furnishe by the customer with the or er:
1) Give the pump serial number an size. These may be foun
on the pump name plate. The serial number is also stampe
on the suction flange of the pump.
2) Give the part name, part number an material of part. These
shoul agree with the stan ar parts list nomenclature.
3) Give the quantity of each part require .
4) Give complete shipping instructions.
SPARE PARTS
h) Put the backhea (22) in place an secure with the back-
hea in exing cap screws (22A). Make sure that the shims
(37) are in place. Tighten the cap screws to 20 ft. lb of
torque.
i) Clean the impeller (3) threa s an the shaft threa s thor-
oughly. Spray the insi e threa s of the impeller an the shaft
threa s with Loctite Primer T an allow the primer to ry.
See instructions on the primer can. Apply Loctite Gra e AA
compoun to the insi e threa s of the impeller only until all
parts of the threa s are wet. Avoi getting the compoun on
the gasket recess in the impeller or on the face of the
impeller. Install the impeller gasket (77A). Screw the impeller
onto the shaft an tighten to 50 ft. lb. Using a feeler gauge,
check the clearance between the impeller (3) an the back-
hea (22). This clearance shoul be 0.009" to 0.013". If
not, a or remove shims to obtain this clearance.
Curing time of the Loctite Gra e AA compoun when use
with Loctite Primer T is about 30 minutes.
j) Rotate the motor shaft by turning the impeller (3) by han
(wear heavy gloves) to be certain that there is no internal
interference.
k) If the pump is to be packe , see ”Installation an
Maintenance of Stuffing Box Packing“ for proper proce ure.
l) The rotating assembly is now rea y to be returne to the
installation site for final assembly.
m) Place a new casing gasket (77) into the recess in the casing
(5). Use a mechanical lifting apparatus to lower the rotating
assembly into the casing (5). Install the casing cap screws
(5D) an tighten them to 50 ft. lb.
n) Remove the motor fan cover an rotate the motor shaft by
turning the motor fan by han (wear heavy gloves) to be
certain that there is no internal interference. Replace the
motor fan cover an fasten it securely in place.
o) Reinstall all auxiliary piping, systems an equipment.
p) Check to see that all openings have been seale before fill-
ing the pump with liqui .
q) Reconnect the electrical wiring an con uit.
r) Follow the instructions un er ”STARTING THE PUMP“ an
”PUMP START-UP CHECKLIST“.

11 8
Part # Part Nam
10* Shaft Sleeve
10K* Shaft Sleeve Key
13* Packing Glan
14* Stuffing Box Glan Stu
15* Stuffing Box Glan Stu Nut
Part # Part Nam
17* Lantern Ring
18* Splash Collar
22* Backhea
22A Backhea Cap Screw
37* Clearance Shim
Part # Part Nam
3* Impeller
5 Casing
5D* Casing Cap Screw
7 Cra le Spacer
7G Cra le Spacer Cap Screw
* Denotes parts interchangeable in DL230 an pH230 series pumps in matching sizes.
DL200-DL230 SERIES PUMPS
Part # Part Nam
56 Base (Optional)
77* Casing Gasket
77A* Impeller Gasket
95A* Stationary Seal Element
95B* Rotating Seal Face
may have a here to. Exercise care not to amage the
pump sealing surfaces. The type of gasket an material of
construction will vary with service requirements. Attack by
prying an then, if necessary, layering off the ol gasket
with a sharp scraper, attempting to remove it in the largest
possible pieces. Wear heavy leather, long sleeve work
gloves when using the scraper. Wet the gasket before an
uring the scraping operation to re uce the possibility of
fibers becoming airborne. Wear a respirator uring this
operation an until all ebris has been ispose of in a
plastic bag. Remove all of the gasket material own to clean
metal surfaces on both parts that contacte the gasket. Place
all of the gasket resi ue in a plastic bag, seal the bag an
ispose.
l) The casing back cover-impeller-motor assembly of the pump
can now be move to a more convenient location for further
isassembly. Use mechanical lifting equipment to move
assemblies an components.
DISASSEMBLY PROCEDURE
To further ismantle the pump, perform the following steps in the
sequence shown:
WARNING: Us only high quality tools.
Flush parts as disass mbl d to r mov hazardous r sidu from th
pumpag and/or sub-syst m fluids.
W ar prot ctiv quipm nt as advis d at th b ginning of this s ction.
Us m chanical lifting quipm nt to lift ass mbli s and compon nts.
Do not apply h at to parts to assist in disass mbly. Explosion could
occur causing p rsonal injury, d ath, and/or damag to quipm nt.
Do not att mpt to drill, saw or oth rwis cut parts to r mov th m.
Explosion and/or fuming could occur causing p rsonal injury,
d ath, and/or quipm nt damag .
Do not hamm r on any parts. P rsonal injury and/or damag to
quipm nt may occur.
The unit may be turne over an set on the motor to affor easy
access.
a) The shaft has two flats just in front of the flinger (18). Using
a wrench, the shaft shoul be hel as the impeller is
unscrewe . The impeller has a hex boss which may be fitte
with a wrench to ai in removal. The impeller threa is right
han e .
WARNING: H at is not to b appli d to th imp ll r (3) to
loos n it from th shaft (29). This is a pot ntially
hazardous proc dur and is to b avoid d.
b) Remove the glan stu nuts (15) an lower the glan
against the shaft flinger (18).
c) Remove packing from stuffing box if pump is packe .
) Remove the two backhea to spacer cra le cap screws
(22A) an lift out the backhea (22). Remove the clearance
shims (37) an save them.
e) If the pump is fitte with a mechanical seal, loosen the set
screws an remove the seal rotary unit. Remove the seal sta-
tionary insert an the glan (13).
f) Remove the impeller gasket (77A) an shaft sleeve (10),
from the pump shaft.
g) Take out the four cap screws (7G) securing the a apter
cra le to the motor an lift off the a apter cra le (7).
h) The splash collar (18) may be carefully prie off from its
press fit on the shaft.
i) Clean an inspect all parts.
The pump has now been isassemble to the components parts.
REASSEMBLY PROCEDURE
WARNING: Us only high quality tools.
W ar prot ctiv quipm nt as advis d at th b ginning of this s ction.
Us m chanical lifting quipm nt to lift ass mbli s and compon nts.
Do not hamm r on any parts. P rsonal injury and/or damag to
quipm nt may occur.
Do not att mpt to manufactur parts or modify D an Pump parts in
any mann r. D ath, p rsonal injury, and/or damag to quipm nt
may occur. R plac all gask ts, s als, b arings, and lubricants. Motor
b arings must b r plac d by a motor s rvic shop. R plac all parts
that hav worn, corrod d, rod d, or oth rwis d t riorat d.
Us only D an Pump/M t-Pro Corporation parts.
Reassemble the pump by reversing the steps escribe above. In
assembling the pump, using ol or new parts, be sure that no
foreign material, irt, or grime is left on the parts.
a) Clean all parts thoroughly.
b) Replace the splash collar (18) on the shaft an a just to a
close, no interference fit to the motor face.
c) Place the a apter cra le (7) onto the motor pilot fit after
assuring that the fits are clean. Replace the a apter cra le
cap screws (7G) an tighten them to the following torque
value.
3/8" cap screws - torque to 20 ft. lb.
1/2" cap screws - torque to 45 ft. lb.
) To etermine the impeller clearance an the thickness of the
shims (37) necessary in the reassembly, sli e the shaft sleeve
(10) into place. Put the backhea (22) into position. Be sure
no irt is between the mating faces. Screw the impeller (3)
on to the shaft firmly against the hook en of the sleeve.
With a feeler gauge, carefully measure the minimum is-
tance between the back of the impeller vanes an the face
of the backhea . Subtract .010 inches from this measure-
ment. The remain er is the thickness of the a justing shims
(37) require .
e) Remove the impeller (3), an the backhea (22) an insert
the clearance shim. A new set of clearance shims together
with the new impeller an casing gaskets shoul be on
han to use as nee e in the reassembly.
f) If the pump is to be fitte with a mechanical seal, see
“Installation of Stan ar Mechanical Seals,” page 18, for
etaile instructions.
g) If the pump is to be fitte with stuffing box packing, sli e the
glan (13) over the shaft an back against the splash collar.

9 10
DL200 SERIES PUMPS — DISASSEMBLY AND ASSEMBLY PROCEDURES
TYPES DL201 and DL202
WARNING: Work must b p rform d only by thoroughly train d
and qualifi d p rsonn l to assur quality r pair and to r duc th
possibiliti s of injury to p rsonn l and/or damag to quipm nt. If
you do not hav p rsonn l who ar capabl of saf quality r pair
of this quipm nt, w advis you to r turn th quipm nt to DEAN
PUMP to b r pair d.
Wh n it is n c ssary to op n th pump and/or th pumping
syst m, th fluid will b xpos d to th atmosph r and p rsonn l
in th ar a. For th saf ty of all involv d, th risk of xposur of
p rsonn l to th hazards of th pumpag can b r duc d by flush-
ing th ntir syst m with a compatibl , non-toxic, non-hazardous,
stabl liquid b for op ning th pump or th syst m. In all cas s,
wh r th syst m is flush d or not, us th utmost car around th
pumpag and th pumping syst m.
Always w ar th appropriat prot ctiv appar l wh n working on
or around th pumping quipm nt. Saf ty glass s with sid shi lds,
h avy work glov s (us insulat d work glov s wh n handling hot
it ms), st l-to d sho s, hard hat, and any oth r prot ctiv g ar as
n d d for prot ction. On xampl of oth r g ar would b
br athing apparatus wh n working n ar toxic mat rials.
Us only top quality tools.
a) Stop the pump. Turn off the power supply (electricity, steam,
etc.) to the pump river (motor, turbine, engine, etc.) an
lock the switching evice so that it can not be restarte . Tag
the switching evice so that no one will attempt to restart the
unit.
b) Disconnect the electrical wiring an the con uit from the
electric motor at the con uit box of the motor. We strongly
suggest that you mark the motor lea s an the power supply
lea s to assure that they will be reconnecte in the same
way so that the motor rotation will be correct when the
pump is restarte .
c) Close the suction an ischarge valves completely to isolate
the pump from the system. Lock the valves in the close posi-
tion an tag them so that no one will attempt to open them.
) Turn off, lock out, an tag all sub-systems an auxiliary
equipment an auxiliary supply lines to isolate the pumping
unit from any an all power, energy, an /or flui s.
WARNING: Do not att mpt to p rform any work on th unit until
you ar confid nt that th pump and its cont nts hav b n
stabiliz d at ambi nt t mp ratur , and atmosph ric pr ssur .
Put on prot ctiv w ar to prot ct human tissu from attack by th
fluids contain d in th pump any sub-syst ms, and from any vapors
or fum s that could possibly b r l as d from th s fluids. This
could m an br athing apparatus fac shi lds, h avy long sl v
rubb r glov s, rubb r apron, hood, and possibly mor , d p nd nt,
of cours , on th prop rti s of th fluids involv d and th install d
drain and v nt piping arrang m nt. P rsonal injury and/or d ath
can occur if ad quat pr cautions ar not tak n with r gard to th
fluid, th installation and th possibiliti s of th r l as of fluid,
vapors, and/or fum s.
e) Carefully blee -off any pressure remaining in the pump.
Pressure remaining in the pump will be epen ent upon the
pressure in the system when the pump was stoppe ; the
quality, type, an con ition of the isolation valves; the ther-
mal expansion values of the liqui an the pump material;
an the change in the vapor pressure of the flui between
the temperature at the time the isolation valves were close
an the ambient temperature. Blee ing must be through a
valve rain line pipe to a close container mounte lower
than the pump. The container must be arrange with a relief
passage to some point where pressure an fumes will not
be harmful to personnel. The container must also have a
level evice so that etermination can be ma e that
sufficient flui has been raine to empty the pump cavity
an the volume of flui that was containe in the run of
suction an ischarge pipe between the isolation valves
an the pump. After the initial rush of flui from the pump
relieves the pressure, the rain valve can be opene further
to spee the raining operation. When flui quits running
into the rain tank, gauge the volume to see if it is sufficient
to have fully raine the contents of the pump an the
suction an ischarge pipes between the isolation valves.
f) Now rain any small piping, that contains the flui pumpe ,
from all low points into the same container use to rain the
pump. Do not rain any other flui s ( ifferent than the
pumpage) into this container as they may not be compati-
ble. Personal injury, eath, an /or equipment amage
coul occur.
WARNING: Ev n though it might app ar that th cavity b ing
drain d has compl t ly drain d, b xtr m ly car ful about op n-
ing th syst m and/or op ning th pump. If som thing solid in th
pumpag mov s to th vicinity of th drain conn ction, it could
s al-off th drain and maintain pr ssur in th cavity thought to
hav b n drain d. It is also possibl that th isolation valv s ar
not s aling and th r for allowing liquid to flow from th syst m
into th pump. P rsonal injury, d ath and/or quipm nt damag
may occur if gr at caution is not x rcis d.
g) Because of the above possibility, when you loosen the
gaskete joint at the back of the casing (5), loosen the
casing cap screws (5D) only one full turn, an then use jack
screws in the flange of the a apter cra le (7) to break the
gasket seal. If flui an /or pressure remains in the pump it
will spray out now. Use extreme caution, wearing protective
gear, to avoi injury. Do not procee with isassembly until
leakage ceases completely. If leakage oes not cease, the
isolation valves may not be sealing.
WARNING: Wh n you op n th pump, th fluid will b xpos d to
th atmosph r and p rsonn l in th ar a. For th saf ty of all
involv d, th risk of xposur can b r duc d by flushing th cavity
that was just drain d with a compatibl , non-toxic, non-hazardous,
stabl liquid, b for disass mbling th pump.
h) Remove any auxiliary piping that is attache to the pump.
i) Remove the casing cap screws (5D) an using a mechanical
lifting apparatus lift the rotating unit from the casing (5).
j) Flush the wette parts, now expose , with a compatible,
non-toxic, non-hazar ous, stable liqui .
k) Remove the gasket from the face of the casing (5) or the
casing back cover (22) epen ent on which one the gasket
Part # Part Nam
10A* Shaft Packing
10K* Shaft Sleeve Key
13* Packing Glan
14* Stuffing Box Glan Stu
15* Stuffing Box Glan Stu Nut
17* Lantern Ring
Part # Part Nam
18* Splash Collar
19 Internal Seal Circ. Piping
22* Backhea
22A Backhea Cap Screw
37* Clearance Shim
56 Baseplate
Part # Part Nam
3* Impeller
5 Casing
5D* Casing Cap Screw
7 Cra le Spacer
7G Cra le Spacer Cap Screw
10* Shaft Sleeve
* Denotes parts interchangeable in DL230 an pH230 series pumps in matching sizes.
EXPLODED VIEW AND PARTS LIST
Part # Part Nam
56A Baseplate Cap Screw
77* Casing Gasket
77A* Impeller Gasket
95A* Stationary Seal Element
95B* Rotating Seal Face
110-111* Min Flo Bushing

9 10
DL200 SERIES PUMPS — DISASSEMBLY AND ASSEMBLY PROCEDURES
TYPES DL201 and DL202
WARNING: Work must b p rform d only by thoroughly train d
and qualifi d p rsonn l to assur quality r pair and to r duc th
possibiliti s of injury to p rsonn l and/or damag to quipm nt. If
you do not hav p rsonn l who ar capabl of saf quality r pair
of this quipm nt, w advis you to r turn th quipm nt to DEAN
PUMP to b r pair d.
Wh n it is n c ssary to op n th pump and/or th pumping
syst m, th fluid will b xpos d to th atmosph r and p rsonn l
in th ar a. For th saf ty of all involv d, th risk of xposur of
p rsonn l to th hazards of th pumpag can b r duc d by flush-
ing th ntir syst m with a compatibl , non-toxic, non-hazardous,
stabl liquid b for op ning th pump or th syst m. In all cas s,
wh r th syst m is flush d or not, us th utmost car around th
pumpag and th pumping syst m.
Always w ar th appropriat prot ctiv appar l wh n working on
or around th pumping quipm nt. Saf ty glass s with sid shi lds,
h avy work glov s (us insulat d work glov s wh n handling hot
it ms), st l-to d sho s, hard hat, and any oth r prot ctiv g ar as
n d d for prot ction. On xampl of oth r g ar would b
br athing apparatus wh n working n ar toxic mat rials.
Us only top quality tools.
a) Stop the pump. Turn off the power supply (electricity, steam,
etc.) to the pump river (motor, turbine, engine, etc.) an
lock the switching evice so that it can not be restarte . Tag
the switching evice so that no one will attempt to restart the
unit.
b) Disconnect the electrical wiring an the con uit from the
electric motor at the con uit box of the motor. We strongly
suggest that you mark the motor lea s an the power supply
lea s to assure that they will be reconnecte in the same
way so that the motor rotation will be correct when the
pump is restarte .
c) Close the suction an ischarge valves completely to isolate
the pump from the system. Lock the valves in the close posi-
tion an tag them so that no one will attempt to open them.
) Turn off, lock out, an tag all sub-systems an auxiliary
equipment an auxiliary supply lines to isolate the pumping
unit from any an all power, energy, an /or flui s.
WARNING: Do not att mpt to p rform any work on th unit until
you ar confid nt that th pump and its cont nts hav b n
stabiliz d at ambi nt t mp ratur , and atmosph ric pr ssur .
Put on prot ctiv w ar to prot ct human tissu from attack by th
fluids contain d in th pump any sub-syst ms, and from any vapors
or fum s that could possibly b r l as d from th s fluids. This
could m an br athing apparatus fac shi lds, h avy long sl v
rubb r glov s, rubb r apron, hood, and possibly mor , d p nd nt,
of cours , on th prop rti s of th fluids involv d and th install d
drain and v nt piping arrang m nt. P rsonal injury and/or d ath
can occur if ad quat pr cautions ar not tak n with r gard to th
fluid, th installation and th possibiliti s of th r l as of fluid,
vapors, and/or fum s.
e) Carefully blee -off any pressure remaining in the pump.
Pressure remaining in the pump will be epen ent upon the
pressure in the system when the pump was stoppe ; the
quality, type, an con ition of the isolation valves; the ther-
mal expansion values of the liqui an the pump material;
an the change in the vapor pressure of the flui between
the temperature at the time the isolation valves were close
an the ambient temperature. Blee ing must be through a
valve rain line pipe to a close container mounte lower
than the pump. The container must be arrange with a relief
passage to some point where pressure an fumes will not
be harmful to personnel. The container must also have a
level evice so that etermination can be ma e that
sufficient flui has been raine to empty the pump cavity
an the volume of flui that was containe in the run of
suction an ischarge pipe between the isolation valves
an the pump. After the initial rush of flui from the pump
relieves the pressure, the rain valve can be opene further
to spee the raining operation. When flui quits running
into the rain tank, gauge the volume to see if it is sufficient
to have fully raine the contents of the pump an the
suction an ischarge pipes between the isolation valves.
f) Now rain any small piping, that contains the flui pumpe ,
from all low points into the same container use to rain the
pump. Do not rain any other flui s ( ifferent than the
pumpage) into this container as they may not be compati-
ble. Personal injury, eath, an /or equipment amage
coul occur.
WARNING: Ev n though it might app ar that th cavity b ing
drain d has compl t ly drain d, b xtr m ly car ful about op n-
ing th syst m and/or op ning th pump. If som thing solid in th
pumpag mov s to th vicinity of th drain conn ction, it could
s al-off th drain and maintain pr ssur in th cavity thought to
hav b n drain d. It is also possibl that th isolation valv s ar
not s aling and th r for allowing liquid to flow from th syst m
into th pump. P rsonal injury, d ath and/or quipm nt damag
may occur if gr at caution is not x rcis d.
g) Because of the above possibility, when you loosen the
gaskete joint at the back of the casing (5), loosen the
casing cap screws (5D) only one full turn, an then use jack
screws in the flange of the a apter cra le (7) to break the
gasket seal. If flui an /or pressure remains in the pump it
will spray out now. Use extreme caution, wearing protective
gear, to avoi injury. Do not procee with isassembly until
leakage ceases completely. If leakage oes not cease, the
isolation valves may not be sealing.
WARNING: Wh n you op n th pump, th fluid will b xpos d to
th atmosph r and p rsonn l in th ar a. For th saf ty of all
involv d, th risk of xposur can b r duc d by flushing th cavity
that was just drain d with a compatibl , non-toxic, non-hazardous,
stabl liquid, b for disass mbling th pump.
h) Remove any auxiliary piping that is attache to the pump.
i) Remove the casing cap screws (5D) an using a mechanical
lifting apparatus lift the rotating unit from the casing (5).
j) Flush the wette parts, now expose , with a compatible,
non-toxic, non-hazar ous, stable liqui .
k) Remove the gasket from the face of the casing (5) or the
casing back cover (22) epen ent on which one the gasket
Part # Part Nam
10A* Shaft Packing
10K* Shaft Sleeve Key
13* Packing Glan
14* Stuffing Box Glan Stu
15* Stuffing Box Glan Stu Nut
17* Lantern Ring
Part # Part Nam
18* Splash Collar
19 Internal Seal Circ. Piping
22* Backhea
22A Backhea Cap Screw
37* Clearance Shim
56 Baseplate
Part # Part Nam
3* Impeller
5 Casing
5D* Casing Cap Screw
7 Cra le Spacer
7G Cra le Spacer Cap Screw
10* Shaft Sleeve
* Denotes parts interchangeable in DL230 an pH230 series pumps in matching sizes.
EXPLODED VIEW AND PARTS LIST
Part # Part Nam
56A Baseplate Cap Screw
77* Casing Gasket
77A* Impeller Gasket
95A* Stationary Seal Element
95B* Rotating Seal Face
110-111* Min Flo Bushing

11 8
Part # Part Nam
10* Shaft Sleeve
10K* Shaft Sleeve Key
13* Packing Glan
14* Stuffing Box Glan Stu
15* Stuffing Box Glan Stu Nut
Part # Part Nam
17* Lantern Ring
18* Splash Collar
22* Backhea
22A Backhea Cap Screw
37* Clearance Shim
Part # Part Nam
3* Impeller
5 Casing
5D* Casing Cap Screw
7 Cra le Spacer
7G Cra le Spacer Cap Screw
* Denotes parts interchangeable in DL230 an pH230 series pumps in matching sizes.
DL200-DL230 SERIES PUMPS
Part # Part Nam
56 Base (Optional)
77* Casing Gasket
77A* Impeller Gasket
95A* Stationary Seal Element
95B* Rotating Seal Face
may have a here to. Exercise care not to amage the
pump sealing surfaces. The type of gasket an material of
construction will vary with service requirements. Attack by
prying an then, if necessary, layering off the ol gasket
with a sharp scraper, attempting to remove it in the largest
possible pieces. Wear heavy leather, long sleeve work
gloves when using the scraper. Wet the gasket before an
uring the scraping operation to re uce the possibility of
fibers becoming airborne. Wear a respirator uring this
operation an until all ebris has been ispose of in a
plastic bag. Remove all of the gasket material own to clean
metal surfaces on both parts that contacte the gasket. Place
all of the gasket resi ue in a plastic bag, seal the bag an
ispose.
l) The casing back cover-impeller-motor assembly of the pump
can now be move to a more convenient location for further
isassembly. Use mechanical lifting equipment to move
assemblies an components.
DISASSEMBLY PROCEDURE
To further ismantle the pump, perform the following steps in the
sequence shown:
WARNING: Us only high quality tools.
Flush parts as disass mbl d to r mov hazardous r sidu from th
pumpag and/or sub-syst m fluids.
W ar prot ctiv quipm nt as advis d at th b ginning of this s ction.
Us m chanical lifting quipm nt to lift ass mbli s and compon nts.
Do not apply h at to parts to assist in disass mbly. Explosion could
occur causing p rsonal injury, d ath, and/or damag to quipm nt.
Do not att mpt to drill, saw or oth rwis cut parts to r mov th m.
Explosion and/or fuming could occur causing p rsonal injury,
d ath, and/or quipm nt damag .
Do not hamm r on any parts. P rsonal injury and/or damag to
quipm nt may occur.
The unit may be turne over an set on the motor to affor easy
access.
a) The shaft has two flats just in front of the flinger (18). Using
a wrench, the shaft shoul be hel as the impeller is
unscrewe . The impeller has a hex boss which may be fitte
with a wrench to ai in removal. The impeller threa is right
han e .
WARNING: H at is not to b appli d to th imp ll r (3) to
loos n it from th shaft (29). This is a pot ntially
hazardous proc dur and is to b avoid d.
b) Remove the glan stu nuts (15) an lower the glan
against the shaft flinger (18).
c) Remove packing from stuffing box if pump is packe .
) Remove the two backhea to spacer cra le cap screws
(22A) an lift out the backhea (22). Remove the clearance
shims (37) an save them.
e) If the pump is fitte with a mechanical seal, loosen the set
screws an remove the seal rotary unit. Remove the seal sta-
tionary insert an the glan (13).
f) Remove the impeller gasket (77A) an shaft sleeve (10),
from the pump shaft.
g) Take out the four cap screws (7G) securing the a apter
cra le to the motor an lift off the a apter cra le (7).
h) The splash collar (18) may be carefully prie off from its
press fit on the shaft.
i) Clean an inspect all parts.
The pump has now been isassemble to the components parts.
REASSEMBLY PROCEDURE
WARNING: Us only high quality tools.
W ar prot ctiv quipm nt as advis d at th b ginning of this s ction.
Us m chanical lifting quipm nt to lift ass mbli s and compon nts.
Do not hamm r on any parts. P rsonal injury and/or damag to
quipm nt may occur.
Do not att mpt to manufactur parts or modify D an Pump parts in
any mann r. D ath, p rsonal injury, and/or damag to quipm nt
may occur. R plac all gask ts, s als, b arings, and lubricants. Motor
b arings must b r plac d by a motor s rvic shop. R plac all parts
that hav worn, corrod d, rod d, or oth rwis d t riorat d.
Us only D an Pump/M t-Pro Corporation parts.
Reassemble the pump by reversing the steps escribe above. In
assembling the pump, using ol or new parts, be sure that no
foreign material, irt, or grime is left on the parts.
a) Clean all parts thoroughly.
b) Replace the splash collar (18) on the shaft an a just to a
close, no interference fit to the motor face.
c) Place the a apter cra le (7) onto the motor pilot fit after
assuring that the fits are clean. Replace the a apter cra le
cap screws (7G) an tighten them to the following torque
value.
3/8" cap screws - torque to 20 ft. lb.
1/2" cap screws - torque to 45 ft. lb.
) To etermine the impeller clearance an the thickness of the
shims (37) necessary in the reassembly, sli e the shaft sleeve
(10) into place. Put the backhea (22) into position. Be sure
no irt is between the mating faces. Screw the impeller (3)
on to the shaft firmly against the hook en of the sleeve.
With a feeler gauge, carefully measure the minimum is-
tance between the back of the impeller vanes an the face
of the backhea . Subtract .010 inches from this measure-
ment. The remain er is the thickness of the a justing shims
(37) require .
e) Remove the impeller (3), an the backhea (22) an insert
the clearance shim. A new set of clearance shims together
with the new impeller an casing gaskets shoul be on
han to use as nee e in the reassembly.
f) If the pump is to be fitte with a mechanical seal, see
“Installation of Stan ar Mechanical Seals,” page 18, for
etaile instructions.
g) If the pump is to be fitte with stuffing box packing, sli e the
glan (13) over the shaft an back against the splash collar.

7 12
with a ouble mechanical seal, a seal circulation line is furnishe .
When the pump is properly fille an starte , pumpage will flush
the seal faces an will also expel any air or vapors from the seal
chamber.
It is important that a pump shoul never be subjecte to thermal or
pressure shock. The liqui shoul therefore be allowe to flow into
the casing slowly. A centrifugal pump shoul never be starte until
all the parts are up to the temperature of the liqui to be pumpe .
A centrifugal pump shoul be starte with the suction valve open
an the ischarge valve opene a slight amount.
If rotation irection is correct an the pump properly fille with liq-
ui , it may now be starte .
After the pump is up to spee , the ischarge valve must be opene
slowly. A centrifugal pump shoul not be operate for any appre-
ciable time against a close ischarge valve since the liqui in the
casing will begin to heat up. During the first several minutes of
operating watch the pump carefully for overheating, vibration, an
other abnormal con itions. If trouble evelops, stop pump at once
an correct the problem.
Check these points carefully after pump installation an before
starting up the pump.
1) Rea instruction manual thoroughly an un erstan it.
2) Review pump or er or er acknowle gment sheet for the
service rating of the pump an any special features.
3) Check all piping connections, making certain that
connections are to the correct openings an that all
connections are tight.
4) If a pump support base is being use , make sure that it has
been installe properly.
5) Lock out, an tag, the electrical supply to the motor. Remove
the motor fan cover. Rotate the motor shaft, by han , to be
sure that there is no bin ing or rubbing within the pump or
the motor. Correct any ifficulties at once. Replace an
secure the motor fan cover.
6) Check to see that the motor bearings have been properly
lubricate .
7) Check the electrical connections to the motor. Unlock an
remove tag from the electrical supply to the motor.
8) If pump stuffing box is packe , check to be sure that glan
stu nuts are pulle up only finger tight an that the glan is
not cocke .
9) “Bump” the motor starting button to check motor rotation.
Operating the pump in reverse rotation may cause extensive
amage. If the rotation is not correct, lock out an tag the
electrical supply. Reconnect the wiring for proper rotation.
Unlock an remove tag from the electrical supply to the
motor. Go through the above proce ure again to check the
motor rotation.
10) Remove all irt, waste, tools, an construction ebris from
the area.
PUMP START-UP CHECKLIST
To avoi prolonge own time an facilitate rapi repair of
amage pump parts, Dean recommen s the pump user maintain
a minimum stock of spare parts. If the pump service is critical or the
pump parts are of special materials, a spare parts stock is even
more important to the user. Such a spares inventory may exten
from a spare mechanical seal or seal parts through complete back-
hea -impeller-motor assembly prepare for imme iate insertion into
the pump casing. Consult your Dean representative who will assist
you in selecting your spares stock.
ORDERING SPARE PARTS
Spare part or ers will be han le with a minimum elay if the
following information is furnishe by the customer with the or er:
1) Give the pump serial number an size. These may be foun
on the pump name plate. The serial number is also stampe
on the suction flange of the pump.
2) Give the part name, part number an material of part. These
shoul agree with the stan ar parts list nomenclature.
3) Give the quantity of each part require .
4) Give complete shipping instructions.
SPARE PARTS
h) Put the backhea (22) in place an secure with the back-
hea in exing cap screws (22A). Make sure that the shims
(37) are in place. Tighten the cap screws to 20 ft. lb of
torque.
i) Clean the impeller (3) threa s an the shaft threa s thor-
oughly. Spray the insi e threa s of the impeller an the shaft
threa s with Loctite Primer T an allow the primer to ry.
See instructions on the primer can. Apply Loctite Gra e AA
compoun to the insi e threa s of the impeller only until all
parts of the threa s are wet. Avoi getting the compoun on
the gasket recess in the impeller or on the face of the
impeller. Install the impeller gasket (77A). Screw the impeller
onto the shaft an tighten to 50 ft. lb. Using a feeler gauge,
check the clearance between the impeller (3) an the back-
hea (22). This clearance shoul be 0.009" to 0.013". If
not, a or remove shims to obtain this clearance.
Curing time of the Loctite Gra e AA compoun when use
with Loctite Primer T is about 30 minutes.
j) Rotate the motor shaft by turning the impeller (3) by han
(wear heavy gloves) to be certain that there is no internal
interference.
k) If the pump is to be packe , see ”Installation an
Maintenance of Stuffing Box Packing“ for proper proce ure.
l) The rotating assembly is now rea y to be returne to the
installation site for final assembly.
m) Place a new casing gasket (77) into the recess in the casing
(5). Use a mechanical lifting apparatus to lower the rotating
assembly into the casing (5). Install the casing cap screws
(5D) an tighten them to 50 ft. lb.
n) Remove the motor fan cover an rotate the motor shaft by
turning the motor fan by han (wear heavy gloves) to be
certain that there is no internal interference. Replace the
motor fan cover an fasten it securely in place.
o) Reinstall all auxiliary piping, systems an equipment.
p) Check to see that all openings have been seale before fill-
ing the pump with liqui .
q) Reconnect the electrical wiring an con uit.
r) Follow the instructions un er ”STARTING THE PUMP“ an
”PUMP START-UP CHECKLIST“.

13 6
Pump motor bearings are properly lubricate for nominal service
con itions when the unit is shippe from the factory. The bearings
are of stan ar regreasable type an inlet an outlet channels
close with pipe plugs are provi e . To regrease the motor
bearings, remove the two pipe plugs for each bearing an insert
a grease fitting in the inlet hole. Use a low pressure grease gun
to inject the proper gra e of new grease. The grease cavity
shoul be fille no more than three fourths (3/4) full. Over-
lubrication may cause early bearing failure. Run the motor
until it has warme up an then remove the grease fitting an
replace the pipe plugs.
The proper grease lubricant epen s on the ambient temperature,
the pumping temperature, an the atmospheric contamination at
each pump installation. Specific lubricants, lubrication sche ule,
an lubrication instructions must be obtaine by the customer
from his local lubrication specialist.
In general, for reasonable ambient an contamination free
atmospheres, a high quality lithium #2 grease will usually give
satisfactory performance up to a pumping temperature of 350°F.
Above this, a high quality high temperature grease will be
require . The lubrication sche ule must be suite to the
particular installation.
MOTOR BEARING LUBRICATION
A centrifugal pump shoul be starte with the suction valve open
an the ischarge valve opene a slight amount.
It is important that a pump shoul never be subjecte to thermal or
pressure shock. The liqui shoul therefore be allowe to flow into
the casing slowly. A centrifugal pump shoul never be starte until
all the parts are up to the temperature of the liqui to be pumpe .
FILLING THE PUMP
WARNING: B for filling th pump with liquid, ch ck to s that all
possibl l ak locations ar s al d. S that th point wh r th
pump shaft nt rs th pr ssur containing cavity is s al d. This
s aling is accomplish d with a m chanical fac s al. S that all of
th conn ctions into th pr ssur containing cavity ar s al d or
conn ct d to a r lat d piping syst m that also has all possibl l ak
paths s al d. Us a wr nch on all bolt d joints to apply torqu to
assur that all gask ts ar s al d in a tight joint. Ch ck to s that
all thr ad d pip conn ctions ar also tight nough to s al th
liquid pr ssur that will b appli d wh n th syst m is start d.
When the source of liqui supplie to the pump is below atmos-
pheric pressure or locate below the pump, the pump must be
prime prior to start-up. The priming may be accomplishe in any
of several ways, three of which are liste .
1) An exhauster may be connecte to the ischarge piping
between the pump an the ischarge shut-off valve. With the
ischarge shut-off valve close an the suction valve open,
the air can be exhauste from the pump an piping.
2) With a foot valve installe in the suction piping, the pump
may be fille with liqui intro uce somewhere above the
pump in the ischarge line. The stuffing box shoul be
vente to allow complete filling. A foot valve may create
extensive losses an shoul be taken into consi eration in
calculating the available NPSH.
3) A vacuum pump (preferably a wet vacuum pump) may be
use for evacuating air from the pump an piping. The
vacuum pump shoul be connecte as is the exhauster
covere in No. 1.
When the source of liqui supplie to the pump is above atmos-
pheric pressure or above the pump centerline, the pump may be
fille by venting through a blee off line to atmosphere or back to
the pump suction source.
If the pump is equippe with cooling water piping this shoul be
turne on before filling the pump.
It is most important to ch ck th dir ction of rotation of th pump
b for allowing th pump to com up to sp d. To check rotation
irection, push the starting button an instantly push the stop button.
This will allow the motor to turn over a few revolutions an the
irection of the rotation to be observe . A irection of rotation
arrow is shown on the si e of the pump casing. If rotation is incor-
rect, change the wiring connections an recheck rotation.
Op rating
th pump in r v rs rotation will caus xt nsiv damag .
OPERATING THE PUMP
WARNING: B for starting th unit, s that all p rsonn l ar a saf
distanc away from all possibl hazards, that all sub-syst ms ar con-
n ct d and op rating, that all d bris has b n r mov d, and that th
pump is full of liquid.
Do not op rat this pump at shut-off (no-flow) as an xplosion may
r sult. This can occur with any liquid, v n “cold wat r”. P rsonal
injury, d ath, quipm nt damag , and/or loss of product (pumpag ) is
lik ly to occur. If your syst m is op rat d wh r it is possibl for all
outl ts of th discharg from th pump to b clos d whil th pump is
still op rating, a modification of th syst m n ds to b mad to
assur a continual flow of pumpag through th pump. NOTE: Som
p opl hav a b li f that a bypass lin from th discharg sid of th
pump to th suction sid of th pump will r li v this probl m, this is
“NOT TRUE”; DO NOT ATTEMPT THIS.
WARNING: Do not op rat a pump at a low flow condition, unl ss
provision has b n mad to pr v nt dang rous h at build up within
th pump casing. Th liquid in th pump will h at up and this may
r sult in high pr ssur in th pump in a short tim . Such pr ssur may
r sult in a ruptur of th pr ssur -containing parts and caus s v r
hazard to p rsonn l and/or damag to th syst m.
A c ntrifugal pump should n v r b run without liquid in th
casing. Ext nsiv damag may r sult, particularly to th
m chanical s al or stuffing box packing. V nt th pump s al
chamb r through th s al conn ction to provid lubrication to
th m chanical s al fac s.
When the pump is equippe with a mechanical seal, lubrication of
the mechanical seal faces must occur very quickly after start-up.
Unless special external flushing is employe or the pump is fitte
STARTING THE PUMP
WARNING: Work must b p rform d only by thoroughly train d
and qualifi d p rsonn l to assur quality r pair and to r duc th
possibiliti s of injury to p rsonn l and/or damag to quipm nt. If
you do not hav p rsonn l who ar capabl of saf quality r pair
of this quipm nt, w advis you to r turn th quipm nt to DEAN
PUMP to b r pair d.
Wh n it is n c ssary to op n th pump and/or th pumping
syst m, th fluid will b xpos d to th atmosph r and p rsonn l
in th ar a. For th saf ty of all involv d, th risk of xposur of
p rsonn l to th hazards of th pumpag can b r duc d by flush-
ing th ntir syst m with a compatibl , non-toxic, non-hazardous,
stabl liquid b for op ning th pump or th syst m. In all cas s,
wh r th syst m is flush d or not, us th utmost car around th
pumpag and th pumping syst m.
Always w ar th appropriat prot ctiv appar l wh n working on
or around th pumping quipm nt. Saf ty glass s with sid shi lds,
h avy work glov s (us insulat d work glov s wh n handling hot
it ms), st l-to d sho s, hard hat, and any oth r prot ctiv g ar as
n d d for prot ction. On xampl of oth r g ar would b br ath-
ing apparatus wh n working n ar toxic mat rials.
Us only top quality tools.
a) Stop the pump. Turn off the power supply (electricity, steam,
etc.) to the pump river (motor, turbine, engine, etc.) an
lock the switching evice so that it can not be restarte . Tag
the switching evice so that no one will attempt to restart the
unit.
b) Disconnect the electrical wiring an the con uit from the
electric motor at the con uit box of the motor. We strongly
suggest that you mark the motor lea s an the power supply
lea s to assure that they will be reconnecte in the same
way so that the motor rotation will be correct when the
pump is restarte .
c) Close the suction an ischarge valves completely to isolate
the pump from the system. Lock the valves in the close posi-
tion an tag them so that no one will attempt to open them.
) Turn off, lock out, an tag all sub-systems an auxiliary
equipment an auxiliary supply lines to isolate the pumping
unit from any an all power, energy, an /or flui s.
WARNING: Do not att mpt to p rform any work on th unit until
you ar confid nt that th pump and its cont nts hav b n
stabiliz d at ambi nt t mp ratur , and atmosph ric pr ssur .
Put on prot ctiv w ar to prot ct human tissu from attack by th
fluids contain d in th pump any sub-syst ms, and from any vapors
or fum s that could possibly b r l as d from th s fluids. This
could m an br athing apparatus fac shi lds, h avy long sl v
rubb r glov s, rubb r apron, hood, and possibly mor , d p nd nt,
of cours , on th prop rti s of th fluids involv d and th install d
drain and v nt piping arrang m nt. P rsonal injury and/or d ath
can occur if ad quat pr cautions ar not tak n with r gard to th
fluid, th installation and th possibiliti s of th r l as of fluid,
vapors, and/or fum s.
e) Carefully blee -off any pressure remaining in the pump.
Pressure remaining in the pump will be epen ent upon the
pressure in the system when the pump was stoppe ; the
quality, type, an con ition of the isolation valves; the ther-
mal expansion values of the liqui an the pump material;
an the change in the vapor pressure of the flui between
the temperature at the time the isolation valves were close
an the ambient temperature. Blee ing must be through a
valve rain line pipe to a close container mounte lower
than the pump. The container must be arrange with a relief
passage to some point where pressure an fumes will not
be harmful to personnel. The container must also have a
level evice so that etermination can be ma e that suffi-
cient flui has been raine to empty the pump cavity an
the volume of flui that was containe in the run of suction
an ischarge pipe between the isolation valves an the
pump. After the initial rush of flui from the pump relieves
the pressure, the rain valve can be opene further to spee
the raining operation. When flui quits running into the
rain tank, gauge the volume to see if it is sufficient to have
fully raine the contents of the pump an the suction an
ischarge pipes between the isolation valves.
f) Now rain any small piping, that contains the flui pumpe ,
from all low points into the same container use to rain the
pump. Do not rain any other flui s ( ifferent than the
pumpage) into this container as they may not be compati-
ble. Personal injury, eath, an /or equipment amage
coul occur.
WARNING: Ev n though it might app ar that th cavity b ing
drain d has compl t ly drain d, b xtr m ly car ful about op n-
ing th syst m and/or op ning th pump. If som thing solid in th
pumpag mov s to th vicinity of th drain conn ction, it could
s al-off th drain and maintain pr ssur in th cavity thought to
hav b n drain d. It is also possibl that th isolation valv s ar
not s aling and th r for allowing liquid to flow from th syst m
into th pump. P rsonal injury, d ath and/or quipm nt damag
may occur if gr at caution is not x rcis d.
g) Because of the above possibility, when you loosen the
gaskete joint at the back of the casing (5), loosen the
casing cap screws (5D) only one full turn, an then use jack
screws in the flange of the a apter cra le (7) to break the
gasket seal. If flui an /or pressure remains in the pump it
will spray out now. Use extreme caution, wearing protective
gear, to avoi injury. Do not procee with isassembly until
leakage ceases completely. If leakage oes not cease, the
isolation valves may not be sealing.
WARNING: Wh n you op n th pump, th fluid will b xpos d to
th atmosph r and p rsonn l in th ar a. For th saf ty of all
involv d, th risk of xposur can b r duc d by flushing th cavity
that was just drain d with a compatibl , non-toxic, non-hazardous,
stabl liquid, b for disass mbling th pump.
h) Remove any auxiliary piping that is attache to the pump.
DL230 SERIES PUMPS — DISASSEMBLY AND ASSEMBLY PROCEDURES
TYPES DL231 and DL232

Pumps may be furnishe with optional stuffing box jacket
an /or jackete mechanical seal glan , accor ing to the
pump service.
STUFFING BOX COOLING
Cooling is generally recommen e un er these con itions:
1) With a mechanical seal when the pumping temperature
is above 350°F. In ivi ual plant specifications may
require cooling above 250°F. Sp cific applications (such
as wat r) may r quir cooling at low r t mp ratur s.
2) With a mechanical seal when pumping liqui s of 0.75
specific gravity or less when the pumping temperature
permits further cooling.
3) With packing at temperatures above 250°F.
PUMP COOLING REQUIREMENTS
5 14
WARNING:
Strain caus d by “forcing”, improp r flang bolting, and/or
misalignm nt may caus failur of th pumping unit, flang s,
piping and/or fluid (pumpag ) r l as which could caus p rson-
al injury, d ath, and/or damag to this and/or oth r quipm nt.
Install a “new” bolt, of the correct size per ASME/ANSI B16.5
an the correct material per ASME/ANSI B16.5, in every bolt
hole. Tighten all bolts evenly. Use only new uncorro e fasteners.
Connect all other (auxiliary) piping necessary for safe an
successful operation of the equipment in the specific service
con itions of the application.
WARNING:
Mak sur that all piping is install into its corr ct conn ction.
Installation of a pip into an incorr ct location could r sult in an
xplosion and p rsonal injury or d ath as w ll as damag to this
and/or oth r quipm nt.
Install pr ssur r li f valv s in any caviti s that could b subj ct d
to pr ssur s in xc ss of th allowabl working pr ssur .
Explosion, p rsonal injury, d ath, and/or damag to this and/or
oth r quipm nt may occur if pr ssur xc ds allowabl .
JACKETED BACKHEAD CONNECTIONS - DL200 SERIES PUMPS JACKETED BACKHEAD CONNECTIONS - DL230 SERIES PUMPS
WARNING: Improper connection of cooling and or seal connection piping may
be dangerous and may seriously damage pump and system.
COOLING WATER PIPING
No cooling water piping is furnishe with the pump. The
customer must provi e the piping. The cooling inlet piping will
probably inclu e an isolation valve. The cooling outlet piping
must have a flow control valve an a pressure relief valve. The
pressure relief value must be installe between the pump an
the flow control (or isolation) valve. The pressure relief valve
must not be set any higher than 135 PSIG. The outlet piping
shoul lea to an open sight rain or through a suitable flow
metering evice.
COOLING WATER FLOW RATES
Stuffing box jacket cooling water flow rates are relate to
pumping temperature. A rate of 2 to 5 GPM is a visable, the
higher rate at the higher pumping temperature.
WARNING — EXTREME HAZARD TO PERSONNEL: Improp r
conn ction of cooling wat r piping may r sult in th inj ction
of cooling wat r into th pump stuffing box and into th
pumpag . D p nding on t mp ratur this may caus a viol nt
st am xplosion in th pump, piping, or associat d quipm nt
with xtr m hazard to p rsonn l. It may also caus s rious
contamination of th pumpag and h avy corrosion of pump
or quipm nt parts.
WARNING — EXTREME HAZARD TO PERSONNEL: Wh n
cooling wat r is us d to cool th pump, it is mandatory that
th cooling wat r b allow d to flow at any tim th pump is
running. Closing th inl t and/or outl t valv s und r running
conditions may r sult in th wat r in th jack ts r aching high
pr ssur which may l ad to th ruptur of a wat r jack t with
xtr m hazard to p rsonn l.
WARNING: Improper connection of cooling and or seal connection piping may
be dangerous and may seriously damage pump and system.
i) Remove the casing cap screws (5D) an using a mechanical
lifting apparatus lift the rotating unit from the casing (5).
j) Flush the wette parts, now expose , with a compatible,
non-toxic, non-hazar ous, stable liqui .
k) Remove the gasket from the face of the casing (5) or the cas-
ing back cover (22) epen ent on which one the gasket
may have a here to. Exercise care not to amage the
pump sealing surfaces. The type of gasket an material of
construction will vary with service requirements. Attack by
prying an then, if necessary, layering off the ol gasket
with a sharp scraper, attempting to remove it in the largest
possible pieces. Wear heavy leather, long sleeve work
gloves when using the scraper. Wet the gasket before an
uring the scraping operation to re uce the possibility of
fibers becoming airborne. Wear a respirator uring this
operation an until all ebris has been ispose of in a
plastic bag. Remove all of the gasket material own to clean
metal surfaces on both parts that contacte the gasket. Place
all of the gasket resi ue in a plastic bag, seal the bag an
ispose.
l) The casing back cover-impeller-motor assembly of the pump
can now be move to a more convenient location for further
isassembly. Use mechanical lifting equipment to move
assemblies an components.
DISASSEMBLY PROCEDURE
To further ismantle the pump, perform the following steps in the
sequence shown:
WARNING: Us only high quality tools.
Flush parts as disass mbl d to r mov hazardous r sidu from th
pumpag and/or sub-syst m fluids.
W ar prot ctiv quipm nt as advis d at th b ginning of this s ction.
Us m chanical lifting quipm nt to lift ass mbli s and compon nts.
Do not apply h at to parts to assist in disass mbly. Explosion could
occur causing p rsonal injury, d ath, and/or damag to quipm nt.
Do not att mpt to drill, saw or oth rwis cut parts to r mov th m.
Explosion and/or fuming could occur causing p rsonal injury,
d ath, and/or quipm nt damag .
Do not hamm r on any parts. P rsonal injury and/or damag to
quipm nt may occur.
The unit may be turne over an set on the motor to affor easy
access.
a) The shaft has two flats just in front of the flinger (18). Using
a wrench, the shaft shoul be hel as the impeller is
unscrewe . The impeller has a hex boss which may be fitte
with a wrench to ai in removal. The impeller threa is right
han e .
WARNING: H at is not to b appli d to th imp ll r (3) to
loos n it from th shaft (29). This is a pot ntially
hazardous proc dur and is to b avoid d.
b) Remove the glan stu nuts (15) an lower the glan
against the shaft flinger (18).
c) Remove packing from stuffing box if pump is packe .
) Remove the two backhea to spacer cra le cap screws
(22A) an lift out the backhea (22).
e) If the pump is fitte with a mechanical seal, loosen the set
screws an remove the seal rotary unit. Remove the seal sta-
tionary insert an the glan (13).
f) Remove the impeller gasket (77A) an shaft sleeve (10),
an shaft sleeve key (10K), from the pump shaft.
g) Take out the four cap screws (7G) securing the a apter
cra le to the motor an lift off the a apter cra le (7). The
impeller clearance a justing shims (37) shoul be save .
h) The splash collar (18) may be carefully prie off from its
press fit on the shaft.
i) Clean an inspect all parts.
The pump has now been isassemble to the components parts.
REASSEMBLY PROCEDURE
WARNING: Us only high quality tools.
W ar prot ctiv quipm nt as advis d at th b ginning of this s ction.
Us m chanical lifting quipm nt to lift ass mbli s and compon nts.
Do not hamm r on any parts. P rsonal injury and/or damag to
quipm nt may occur.
Do not att mpt to manufactur parts or modify D an Pump parts in
any mann r. D ath, p rsonal injury, and/or damag to quipm nt
may occur. R plac all gask ts, s als, b arings, and lubricants. Motor
b arings must b r plac d by a motor s rvic shop. R plac all parts
that hav worn, corrod d, rod d, or oth rwis d t riorat d.
Us only D an Pump Division of M t-Pro Corporation parts.
Reassemble the pump by reversing the steps escribe above. In
assembling the pump, using ol or new parts, be sure that no
foreign material, irt, or grime is left on the parts.
a) Clean all parts thoroughly.
b) Replace the splash collar (18) on the shaft an a just to a
close, no interference fit to the motor face.
c) Replace the a apter cra le (7) an screw the a apter
cra le cap screws (7G) into place, finger tight. Be sure no
irt or grit is between the faces.
) To etermine the impeller clearance an the thickness of the
shims (37) necessary in the reassembly, sli e the shaft sleeve
(10) an sleeve key (10K) into place. Put the backhea (22)
into position. Be sure no irt is between the mating faces.
Screw the impeller (3) on to the shaft firmly against the hook
en of the sleeve. With a feeler gauge, carefully measure
the minimum istance between the back of the impeller
vanes an the face of the backhea . Subtract .010 inches
from this measurement. The remain er is the thickness of the
a justing shims (37) require .
e) Loosen the four a apter cra le cap screws (7G) an insert
the necessary thickness of shims at each cap screw an
between the face of the motor an the back of the a apter

Always wear the appropriate protective apparel when working
on or aroun the pumping equipment. Safety glasses with si e
shiel s, heavy work gloves (use insulate work gloves when
han ling hot items), steel-toe shoes, har hat, an any other
protective gear as nee e for protection. One example of
other gear woul be breathing apparatus when working near
toxic materials. Use lifting evices, manufacture expressly for
the purpose of lifting, to move the pumping machinery. Do not
attempt to lift the assembly or its components manually. Use
only evices with lifting capabilities in excess of the weight of
the unit being lifte . Inspect straps, chains, hooks, etc. for
amage an lifting capability before use. Lift only at the center
of gravity.
Personal injury, eath, an /or equipment amage coul occur
if goo lifting practices are not use .
APPLICATION AND REAPPLICATION
At the time of installation, the equipment receive shoul have
alrea y been selecte for the service require . You must rea
the paperwork for the installation an check the serial number
of the pump to assure that you are installing the correct pump
into the service for which it was selecte .
Many pumps look i entical from the outsi e but can be ma e
of ifferent materials an /or be constructe ifferently insi e.
Personal injury, eath, equipment amage, pro uct (pumpage)
amage, an /or pro uct loss coul occur if the incorrect pump
is installe .
Do not transfer an existing pump to any other service con itions
until you have thoroughly reviewe the pump construction, materi-
als, sizing, sealing, pressure containing capability, hea /capacity
capability, an temperature capability with respect to the require
service. Consult your Dean Pump sales engineer with all the ser-
vice requirements an a full escription of the existing pump
(inclu ing the serial number), seal, an sub-systems so that we can
assist you in a successful reapplication.
PUMP MOUNTING
It is recommen e that DL200 Series an DL230 Series pumps
be mounte with the motor vertically upright. Other positions
are possible if a equate support is provi e .
A pump support base for vertically upright mounting is
require in accor ance with this tabulation:
Pump Siz Us Bas Abov HP
1 x 11/2x 6 DL200 Series Base not require
11/2x 3 x 6 DL200 Series Base not require
All DL230 Series 15
When a pump support base is not use , a equate pipe sup-
ports must be provi e for the piping at locations close on
either si e of the pump.
The foun ation for the pump support base nee not be elabo-
rate. Four hol own bolt holes are provi e in each base an
the foun ation shoul inclu e four stu s to match these holes.
The support base shoul be seate in a thin layer of grout to
assure even support.
SUCTION AND DISCHARGE PIPING
Suction an ischarge nozzle sizes of Dean pumps are select-
e for proper performance of the pumping unit an are not
inten e to etermine the suction an ischarge pipe sizes.
Pipe sizes must be etermine by the user base on the system
requirements.
Suction piping shoul have a minimum friction loss an thus
shoul be as short an straight as possible with a pipe iame-
ter as large as economically feasible for the flow rate han le .
Suction piping shoul never be smaller in iameter than the
suction nozzle size. When the suction piping is larger than the
suction nozzle size an eccentric re ucer is require at the
suction flange an must be installe with the taper locate on
the un ersi e to eliminate air or vapor pockets. The section of
piping attache to the suction flange of the pump shoul be
straight for a length of eight pipe iameters or more.
Discharge piping may be the same size as, larger, or smaller
than the ischarge nozzle as the system flow may eman .
In new installations or rebuilt systems, irt, pipe scale, wel ing
slag an general construction ebris may get into the piping. It
is important to prevent this material from entering the pump
an amaging pump parts, mechanical seal faces, or stuffing
box packing. Mechanical seal parts are especially subject to
amage even by very small particles. To prevent amage, a
strainer or filter installe in the suction line is recommen e .
Commercially available strainers or filters as recommen e by
their manufacturers can o an excellent job. In a ition,
special filtering an mechanical seal flushing guar s may be
require . Consult your Dean representative. Suction line
screens or strainers may usually be remove when, after
several ays of use, no irt has been collecte an the system
is clean.
Remember that screens an filters in the suction line are restrict-
ing evices which re uce the net positive suction hea (NPSH)
available to the pump an shoul be consi ere at the time the
system is esigne .
Install “new” gaskets, of the correct material for the service,
an the correct size per ASME B16.20 or ASME B16.21 at
the suction an the ischarge flanges of the pump. Use only
new gaskets. Connect the suction an ischarge piping without
forcing the piping into position. The pipe flanges must line up
with the pump flanges ”freely”.
INSTALLATION
TYPICAL PUMP PIPING
15 4
cra le (7). A new set of clearance shims together with the
new impeller an casing gaskets shoul be on han to use
as nee e in the reassembly. Tighten the a apter cra le cap
screws (7G) to the following torque value.
1/2" cap screws - torque to 45 ft. lb.
5/8" cap screws - torque to 70 ft. lb.
Using a feeler gauge, check the clearance between the
impeller (3) an the backhea (22). This clearance shoul
be 0.009" to 0.013", if not, a or remove shims to obtain
this clearance.
f) If the pump is to be fitte with a mechanical seal, see
”Installation of Stan ar Mechanical Seals,“ page 18, for
etaile instructions.
g) If the pump is to be fitte with stuffing box packing, remove
the impeller (3) an backhea (22). Sli e the glan (13)
over the shaft an back against the splash collar (18).
h) Put the backhea (22) in place an secure with the back-
hea in exing cap screws (22A). Tighten the cap screws to
20 ft. lb.
i) Clean the impeller (3) threa s an the shaft threa s thor-
oughly. Spray the insi e threa s of the impeller an the shaft
threa s with Loctite Primer T an allow the primer to ry.
See instructions on the primer can. Apply Loctite Gra e AA
compoun to the insi e threa s of the impeller only until all
parts of the threa s are wet. Avoi getting the compoun on
the gasket recess in the impeller. Install the impeller gasket
Screw the impeller in place an tighten to 60 ft. lb.
Curing time of the Loctite Gra e AA compoun when use
with Loctite Primer T is about 30 minutes.
j) Rotate the motor shaft by turning the impeller (3) by han
(wear heavy gloves) to be certain that there is no internal
interference.
k) If the pump is to be packe , see “Installation an
Maintenance of Stuffing Box Packing” for proper proce ure.
l) The rotating assembly is now rea y to be returne to the
installation site for final assembly.
m) Place a new casing gasket (77) into the recess in the casing
(5). Use a mechanical lifting apparatus to lower the rotating
assembly into the casing (5). Install the casing cap screws
(5D) an tighten them to the following values.
1/2" cap screws - torque to 50 ft. lb.
5/8" cap screws - torque to 75 ft. lb.
n) Remove the motor fan cover an rotate the motor shaft by
turning the motor fan by han (wear heavy gloves) to be
certain that there is no internal interference. Replace the
motor fan cover an fasten it securely in place.
o) Reinstall all auxiliary piping, systems an equipment.
p) Check to see that all openings have been seale before
filling the pump with liqui .
q) Reconnect the electrical wiring an con uit.
r) Follow the instructions un er ”STARTING THE PUMP“ an
”PUMP START-UP CHECKLIST“.

3 16
INSTALLATION AND MAINTENANCE OF STUFFING BOX PACKING
The proper installation an maintenance of packing to seal a
pump shaft is not ifficult but must be properly one to provi e
goo packing an pump shaft sleeve life. All packing must be
allowe to leak. This leakage is the only lubrication for the
packing an a itionally provi es cooling to remove part of
the frictional heat built up between the shaft sleeve an the
packing. Failure to allow sufficient leakage will result in short
packing an shaft sleeve life an increase power consump-
tion of the pumping unit. It is entirely possible to stall a
centrifugal pump by clamping the packing glan own.
Most Dean pumps are shippe from the factory without
packing in the stuffing box. A complete set of ie mol e
packing specifie for the service is shippe with the pump
in a separately labele carton. The pump stuffing box must
be properly packe before the pump is put into service.
The stuffing box may be packe either with or without a
lantern ring (also known as a seal cage or lantern glan ) as
the service of the pump ictates. When the pump suction
pressure is above 100 psig a lantern ring is not recommen e .
PURPOSE OF LANTERN RING
Lantern rings are ma e of Teflon or suitable metal as the ser-
vice eman s. They are of split construction an may be easily
installe or remove without isassembling the pump. A lantern
ring is use in the stuffing box with packing for these reasons:
1) To permit the intro uction of a sealing liqui into the
stuffing box to prevent leakage of air into the pump
through the packing when the pump suction pressure is
less than atmospheric pressure. The sealing liqui may
be from an internal seal connection or from an external
source.
2) To permit intro uction of grease, oil, or other suitable
lubricant to the packing to provi e lubrication or cooling.
INTERNAL SEAL CONNECTION
TO THE LANTERN RING
An internal seal connection is use to inject pumpage from
the pump casing into the lantern ring through the lantern ring
connection of the stuffing box to seal the pump against air
leakage as note above. It can be use only when the pumpe
liqui is clean an non-abrasive.
Th pump d liquid introduc d through th int rnal s al conn ction
to th lant rn ring will not s al th pump against air l akag
through th packing wh n th pump is idl or on stand-by s rvic .
EXTERNAL SEAL CONNECTION
TO THE LANTERN RING
The sealing liqui intro uce to the lantern ring may be from a
source external to the pump. It must be intro uce at a pres-
sure above stuffing box pressure an must be non-corrosive,
non-abrasive an a equately cool. The connection is ma e to
the lantern ring connection on the pump stuffing box.
The lantern ring connection on the pump stuffing box is also
use to intro uce grease, oil, or other suitable lubricants to the
lantern ring.
LANTERN RING NOT USED
When the pump suction pressure is above atmospheric pres-
sure or the stuffing box is pressure seale (no impeller balance
holes) an neither internal nor external liqui or lubricant is
require to the packing, the lantern ring is not use an the
stuffing box is packe full with rings of packing.
PACKED STUFFING BOX WITHOUT LANTERN RING
PACKED STUFFING BOX WITH LANTERN RING
4) When the pump is completely fille , seal the ischarge
opening with a blin flange, gasket, an bolts.
5) Apply a heavy protective coating to any expose metal
surfaces. A rust preventative must be use to protect all
steel an iron parts.
6) Rotate the motor shaft “by han ” each month. Wear heavy
gloves when rotating the shaft, to protect your han s. It
will most likely be necessary to remove the motor fan
cover to gain access to the motor fan to rotate the shaft.
When you are rea y to place the pump in service:
1) Drain the storage liqui from the pump an any auxiliary
piping. Draining can be through the casing rain connec-
tion, the auxiliary piping, the suction flange connection,
an the ischarge flange connection.
2) Remove an iscar the blin suction flange, gasket, an
bolts. Remove an iscar the blin ischarge flange,
gasket, an bolts.
3) Flush all remains of the storage liqui from the pump an
the auxiliary piping. Use a flush liqui that is compatible
with the liqui to be pumpe . Evaluation of compatibility
must inclu e consi eration of the temperature at which the
system will later operate.
4) Discar the storage liqui an the flush liqui . Be sure to
comply with governmental regulations in any isposal.
WARNING:
B sur that th r is nothing r maining in th pump or piping
that could r act with th liquid that will b pump d or that
would hav an xc ssiv vapor pr ssur at th syst m op rat-
ing t mp ratur . For xampl , solv nt r sidu l ft in th pump,
wh n xpos d to th op rating t mp ratur of th syst m,
could cr at a vapor pr ssur in xc ss of th capability of th
syst m to r tain it, th r for causing an xplosion that could
prov fatal.
5) Replace all pipe plugs an tighten them. Tighten any an all
auxiliary piping connections that may have been loosene .
6) Remove the “storage” protective coatings from the external
surfaces of the pump.
Pumps must also be protecte from moisture, irt, an physical
amage, uring an after installation while the system is being
complete . Pumps “store ” as installe in the piping system
must be completely checke for proper installation prior to
start-up.

PACKING INSTALLATION
These instructions apply to the conventional woven, brai e ,
fol e , an wrappe packings. Packings of multifilament
Teflon, brai e carbon filament, compresse carbon sheet,
an other special types or materials may require special
installation techniques.
The way in which the packing is installe in the stuffing box is
important to the goo service life of the packing an the shaft
sleeve. Incorrect installation will lea to excessive leakage an
may cause high power requirements.
The use of a packing tamper (split bushing) is recommen e
to properly seat the packing rings. Such a tool is easily ma e
from woo or metal in the form of a hollow cylin er. The
insi e iameter must be slightly larger than the shaft sleeve
an the outsi e slightly smaller than the stuffing box bore. split
the piece lengthwise to allow insertion in the stuffing box.
More than one length of packing tamper may be necessary.
Suit the lengths to the particular pump.
All packing rings furnishe by Dean Pump Division are
ie-mol e to fit the stuffing box. To place a ring on the shaft
sleeve, open the ring at the split at a right angle to the plane
of the ring. This will best retain the mol e form an avoi
istortion. Successive rings shoul be installe with the joints
at 90° intervals.
Foil wrappe packings must be installe with the foil laps run-
ning in the irection of shaft sleeve rotation on the insi e of the
ring. Metallic packing shoul be lubricate , on the wearing
face only, with a ry graphite lubricant before insertion.
Foil wrappe packing sets are furnishe with soft rings of
packing which are place between the har metallic rings in
the locations shown in the iagrams. These rings help to fur-
nish lubrication uring run-in perio . Being soft, they are more
sensitive to compression loa s an care must be taken uring
the a justment perio .
Follow these steps:
1) With the packing glan sli back against the flinger,
or remove if it is a two piece glan , place a ring of
packing on the shaft sleeve an enter it carefully into
the stuffing box. Insert the halves of the packing tamper
an push the packing ring to the bottom of the stuffing
box. Sli e the packing glan up against the en of the
packing tamper with the glan stu s in exe in the
glan holes, put on the glan stu nuts an tighten them
firmly an evenly to seat the packing ring.
2) Back off the glan , remove the packing tamper, an
insert a secon ring of packing, staggering the ring
joint 90° from that in the first ring. Repeat the seating
proce ure above.
3) If a lantern ring is to be use , check the pump
specifications to etermine its position in relation to
the number of rings between the bottom of the stuffing
box an the lantern ring. Insert packing rings as above
until the lantern ring position is reache an then
install the lantern ring.
4) If no lantern ring is to be use , or after the lantern ring is
put in place, continue to a packing rings, one at a
time, staggering joints at 90° intervals, until the stuffing
box is nearly full.
5) Put the packing glan in place an pull up the glan
stu nuts firmly. Back the glan stu nuts off to finger
tightness.
6) Rotate the pump shaft by han to be sure it is not locke .
7) Final adjustm nt of th packing compr ssion must b
mad with th pump running. Start an stop the pump
several times to begin the running-in perio . Allow
sufficient leakage to assume goo lubrication uring the
a justment. Pull up the glan stu nuts 1/8 turn at a
time. Allow a running-in perio between a justments.
Continue a justment until the esire leakage control is
reache . The minimum leakage rate epen s on a num-
ber of things: liqui pumpe , packing use , temperature,
stuffing box pressure, an the con ition of the pump. In
any case, some leakage is necessary to both lubricate
an cool the packing. Minimum rates may vary from a
few rops per minute to as much as 1/2 pint per minute.
8) As the packing wears in service, the glan shoul be
rea juste to maintain the minimum leakage.
9) After the glan has been taken up to full travel, an a i-
tional ring of packing may be place in the stuffing box.
When the glan has again been taken up to full travel
the stuffing box shoul be repacke completely.
USUAL CAUSES OF PACKING FAILURE AND
EXCESSIVE STUFFING BOX LEAKAGE
1) Packing has not been installe properly.
2) Packing use is not suitable for the temperature an
pressure involve or may be subject to attack by liqui
han le .
3) Inner rings are not thoroughly seate in the stuffing box
so that outer rings are carrying all the loa .
4) Dirt an foreign particles in stuffing box are causing
rapi scoring of shaft sleeve.
5) Stuffing box cooling water not turne on.
6) Packing glan pulle up too tight.
When or ering a itional packing sets, always refer to packing
set number an to pump serial number.
17 2
PRODUCT INSPECTION AND TEST
The Pro ucts of Dean Pump Division are subject to thorough an
rigorous quality control an inspection proce ures throughout the
whole of the manufacturing process to assure proper operation in
full conformity with establishe performance stan ar s. On
completion of inspection, each unit is oile , seale against the
entrance of irt, an tagge with a signe certificate of
inspection prior to shipment. Each pump when shippe is rea y
to perform the service for which it was esigne with minimum
maintenance an expense if properly installe an operate in
accor ance with the instructions furnishe .
DEAN PRODUCT WARRANTY
We warrant to the purchaser from us of Dean Pump pro ucts
an parts of our own manufacture (Dean Pro ucts) that the
Dean Pro ucts are free “un er rate use an service” from
efects in esign, material an workmanship for a perio of
one (1) year from the ate of installation, but not to excee
eighteen (18) months from the ate of shipment by us. This war-
ranty oes not cover (I) any loss or amage resulting from
wear, corrosion, abrasion or eterioration ue to normal use
in rate service; (II) replacement of service items such as shaft
packings, an mechanical seals; (III) pro ucts or parts
manufacture by others but furnishe by us which, if efective,
shall be repaire or replace only to the extent of the original
manufacturer‘s warranty; (IV) any loss or amage to or efects
in any Dean Pro ucts resulting from the misuse or improper
storage, installation, or operation thereof; or (V) any loss or
amages to or efects in any Dean Pro ucts resulting from any
alteration or mo ification thereof not expressly authorize an
approve by us in writing. We shall not be liable, irectly
or in irectly, un er any circumstances for consequential or
inci ental amages, inclu ing, but not limite , to: (I) any
loss of business or profits; an (II) labor, material or other
charges, claims, losses or amages incurre or suffere from,
in connection with or in consequence of the working upon,
alteration, or repair of any efective Dean Pro ucts by persons
or firms other than us. Our liability for breach of warranty
hereun er is limite solely to the repair in our factory or the
replacement F.O.B. our factory, as the case may be, of any
Dean Pro ucts which shall have been etermine by us, after
notice to us an inspection by us within the warranty perio ,
to be so efective when shippe by us.
THIS WARRANTY AND THE LIABILITY SET FORTH HEREIN ARE
EXCLUSIVE AND IN LIEU OF ALL OTHER LIABILITIES AND
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
PARTICULAR PURPOSE.
WARNING
Rea the instruction manual completely before installing, filling,
operating, or maintaining this equipment.
Obtain, rea an hee the MSDS (Material Safety Data Sheet)
for the flui s being han le before attempting to fill, operate or
maintain this equipment. Obtain instructions from the Safety
Engineer responsible for your facility before performing any
work on the pumping equipment an systems.
Proper storage while not in use an proper installation an
start-up are essential for successful pump operation. Misuse or
improper storage, installation or operation of pumps may result
in serious loss or amage. Dean Pump Division is not responsible
for any loss or amage resulting from causes beyon its
control, an is not liable for charges for work performe or
materials furnishe to repair such loss or amage.
All installation, op ration, and maint nanc must b don by
thoroughly qualifi d p rsonn l in strict accordanc with this
manual and must comply with all local, stat and F d ral
cod s. Only D an authoriz d s rvic parts must b us d in
th r pair of th s pumps.
RECEIVING PUMP
Wh n th pump is r c iv d from th transportation company,
it should b promptly insp ct d for damag and such damag
not d on th bill of lading b for it is sign d. Claims for
shipping damag must b fil d against th carri r.
Car must b x rcis d in unloading and handling th pump.
STORAGE
Pumps must be properly covere an protecte against
moisture, irt, an physical amage uring storage prior to
installation an operation.
If prolonge storage is anticipate , o the following:
1) Seal the suction opening of the pump with a blin flange,
gasket, an bolts.
2) Position the pump on its si e so that the motor shaft is hori-
zontal, the suction flange is own, an the ischarge
flange is up.
3) Fill through the ischarge opening of the pump a corrosion
inhibiting liqui that is also compatible with the liqui that
will later be pumpe . Evaluation of compatibility must
inclu e consi eration of the temperature at which the sys-
tem will later operate. Be sure to also vent air from any
auxiliary piping connection to the pump an fill it with the
same inhibitor.
HAZARDOUS SITUATIONS MAY OCCUR UNLESS THIS EQUIPMENT IS APPLIED, INSTALLED, OPERATED, AND MAINTAINED BY THOR-
OUGHLY QUALIFIED PERSONNEL IN STRICT ACCORDANCE WITH THE INSTRUCTION MANUAL AND ALL APPLICABLE DRAWINGS
AND CODES.

INSTALLATION OF STANDARD MECHANICAL SEALS
FOR PUMP TYPES DL201, DL202, DL231 and DL232
Clean, careful, an correct installation of the mechanical seal
is essential to successful mechanical seal operation. Cleanliness
an accuracy of setting cannot be overemphasize .
For instructions on pump isassembly an assembly see the
instruction manual relating to the specific pump type.
A correct mechanical seal rawing is furnishe with each
pump an the mechanical seal setting imension is given on
this rawing.
Use the setting for the specific pump type in which the installa-
tion is being ma e.
The pump is first assemble accor ing to the applicable assem-
bly instructions through the step of proper impeller a justment.
The mechanical seal rotary unit must be properly locate in
relation to the face of the pump stuffing box in or er to estab-
lish the proper seal spring tension an resultant proper force
on the seal faces. An error in setting of more than several thou-
san ths may well cause seal failure by excessive or insufficient
seal face pressure.
INSTALLATION OF SINGLE INSIDE SEALS
To make seal installation, with the pump partially assemble as
note above, scribe a mark on the shaft sleeve (10) exactly in
line with the face of the pump stuffing box. (Note 1). The
impeller (3), an backhea (22) are now remove from the
pump. If the mark causes roughness on the shaft sleeve remove
the burr carefully with crocus cloth. Any roughness on the shaft
sleeve may amage the mechanical seal shaft packing when
the seal is assemble .
Referring to the mechanical seal rawing, etermine the proper
“D” (or setting) imension for the seal an pump type.
Measure carefully from the mark which you have ma e on the
shaft sleeve an make a new mark on the shaft sleeve, towar s
the pump en , exactly to this imension.
If the mechanical seal insert is of the clampe -in style, put the
mechanical seal glan (300) on the pump shaft an sli e it
back against the flinger. Put one mechanical seal glan insert
gasket (325), the glan insert (315) an the other glan insert
gasket (326) on the shaft. Make sure that the lappe face of
the glan insert is towar s the stuffing box.
Flexibly mounte inserts are of two types, epen ing on the
service of the pump. The insert may be of rectangular cross
section groove for an “O” ring or it may be of L-shape cross-
section use with a Teflon mounting ring.
To position the “O” ring mounte insert, lubricate the insi e of
the mechanical seal glan . Place the “O” ring in the groove of
the insert an carefully sli e the insert into position. Be careful
not to amage the “O” ring. Make sure that the lappe face of
the insert faces towar s the pump.
To position the Teflon mounte insert, lubricate the insi e of the
mechanical seal glan . Carefully sli e the Teflon mounting ring
into position in the glan an then sli e the insert into place.
The slot (or pin) in the stationary insert must in ex with the
rive pin (or slot) in the glan .
Put the mechanical seal glan an insert on the shaft an sli e
it back against the flinger. Be careful not to amage the insert
or its mounting. Put the glan gasket (324) on the shaft. Sli e
the seal rotary unit assembly carefully onto the shaft sleeve
being particularly careful not to amage the seal shaft packing
(345). Be sure that the shaft sleeve hook is firmly against the
shoul er on the shaft. Set the rotary unit carefully to the setting
mark you have ma e on the shaft sleeve an lock it tightly in
place with the set screws. Recheck the setting. Sli e the pump
backhea carefully into place an gui e the seal glan insert
an gaskets together with the glan carefully into position.
Reassemble the pump. Now tighten the glan stu nuts careful-
ly an evenly to avoi cocking the glan , making sure that the
glan insert an gaskets are in place.
Before starting the pump, blee the air from the stuffing box.
The stuffing box must be full of liqui or the seal faces may be
amage by lack of lubrication when the pump is starte .
Occasionally a seal may leak very slightly when the pump is
first starte . If the leakage continues more than a few moments
the pump shoul be shut own an the seal remove to iscov-
er the cause.
NOTE 1 — Pumps using a single insi e balance seal
(except metal bellows) are furnishe with a short shaft
sleeve. The mark is ma e on the shaft because the sleeve
oes not exten to this point. The secon mark (setting mark)
is ma e on the shaft sleeve an measure from the mark on
the shaft.
INSTALLATION OF SINGLE OUTSIDE
UNBALANCED SEALS
If the seal rotary unit is scribe with a setting mark, the shaft mark-
ing proce ure outline below may be omitte . The setting mark can
be foun on the outer shell of the rotary unit running circumferential-
ly between the four roun holes in the shell.
Visible through each hole is the e ge of the metal isc against
which the seal springs bear. To set the seal with the proper spring
pressure, first assemble the pump as note below with the seal
rotary unit sli back against the shaft flinger an left loose until the
entire bearing housing-impeller assembly is bolte in place in the
pump casing. Then sli e the seal rotary unit into place against the
stationary insert an compress the springs until the metal isc visible
through the holes is aligne with the setting mark scribe on the
shell. Tighten the set screws an check through each hole to eter-
mine that the seal rotary unit is correctly compresse an not
cocke .
If the seal rotary unit is not marke with a setting line, a setting
mark must be ma e on the shaft sleeve. To make the seal installa-
tion, with the pump partially assemble as note above, scribe a
mark on the shaft sleeve (10) exactly in line with the face of the
pump stuffing box. The impeller (3), an backhea (22) are now
remove from the pump. If the mark causes roughness on the shaft
sleeve remove the burr carefully with crocus cloth. Any roughness
on the shaft sleeve may amage the mechanical seal shaft packing
when the seal is assemble .
MECHANICAL DESIGN SPECIFICATIONS
Direction of Rotation from Motor En . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CW
Bearings in Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Ball Type
Bearing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Grease
Casing Thickness, Minimum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5/16"
Flanges — ASME/ANSI Rating:
Ductile Iron (CL 22), 316 S/S (CL 50) . . . . . . . . . . . . . . . . . . .Class 150
Facing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .FF
Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125 Ra
Impeller Balance . . . . . . . . . . . . . . . . . . . . . . . .Single Plane Dynamic Balance
Allowable Pump Suction Pressure (2 year min. thrust bearing life) . . . . .100 psig
Stuffing Box Jacket Pressure, Maximum . . . . . . . . . . . . . . . . . . . . . . .125 psig
STANDARD MATERIALS OF CONSTRUCTION
Part No. Part Nam Class 22 Class 50
3 Impeller C.I. (1) 316 S/S (10)
5 Casing D.I. (5) 316 S/S (10)
* 5D Casing Cap Screw Steel (11)
7 A apter Cra le Cast Iron (1)
7G A apter Cra le Cap Screw Steel (4)
* 10† Shaft Sleeve 316 S/S (2)
* 10A Shaft Packing Stan ar Sets
* 10K † Shaft Sleeve Key (DL231, DL232 only) Steel (4) 316 S/S (2)
* 13 † Glan Steel (3) 316 S/S (10)
* Denotes DL200 Series parts interchangeable with pH200 Series Pumps, an DL230 Series parts interchangeable with pH230 Series Pumps.
† Denotes part interchangeable within DL200 Series Pumps, or within DL230 Series Pumps.
NOTE: MECHANICAL SEAL MATERIALS: Please refer to specific seal rawing.
MATERIAL SPECIFICATIONS
(1) Cast Iron (4) AISI 1020 (9) TM E.I. u Pont e Nemours & Co.
(2) AISI 316 S/S (5) Ductile Iron ASTM A395 (10) 316 S/S – ASTM #A744, Gra e CF-8M
(3) Cast Steel – ASTM #216, (6) ASTM A193, Gra e B7 (11) ASTM A449
Gra e WCB (7) ASTM A194, Gra e 2
Specifications are subject to change without notice
Part No. Part Nam Class 22 Class 50
* 14 † Glan Stu AISI 304
* 15 † Glan Stu Nut AISI 304
17 † Lantern Ring Teflon (9)
* 18 † Splash Collar Ca mium Plate Steel
* 22 Backhea Steel (3) 316 S/S (10)
* 22A † Backhea In exing Cap Screw Steel (4)
* 37 † Clearance Shim Steel
* 77 † Casing Gasket Teflon (9)
* 77A † Impeller Gasket Teflon (9)
DL201 DL231
DL202 DL232
Horsepower Rating — max. rate
Driver HP not to excee @ 1750 rpm 71
/2HP 50 HP
@ 3500 rpm 15 HP 100 HP
Max. Hy rostatic Test Pressure
Ductile Iron (CL 22), an 316 S/S (CL 50) 430 psig 430 psig
Shaft Packing
Size (square) 5/16"3/8"
Rings with Lantern Ring 55
Spacing 2-R-3 2-R-3
Rings without Lantern Ring 67
Stuffing Box Dimensions
Length ( epth) 21
/8"2
3/4"
Insi e Diameter (bore ia.) 15/8"2
1
/2"
Shaft Sleeve Diameter 1" 13/4"
Lantern Glan Wi th 7/16"5/8"
Distance Lantern Glan to Open En 13/8"1
3/4"
of Stuffing Box
STANDARD, INLINE, SINGLE STAGE, OPEN IMPELLER, CENTRIFUGAL PROCESS PUMPS
TYPES DL201, DL202; DL231, DL232
SERIES DL200/DL230
CENTRIFUGAL PROCESS PUMPS
ALLOWABLE WORKING PRESSURE
VS. PUMPING TEMPERATURE
All mechanically seale pumps contain a seal face flushing connection in the
glan an internal seal circulating piping as stan ar .
All mechanically seale DL202 an DL232 pumps use with cooling jackets
require a Min-Flo Bushing.
1 18
[phone] • E-mail: inf @deanpump.c m
MET-PRO
A
Global Pump Solutions