Dean RWA Series User manual

SERIES RWA
Fan Cooled Hot Water Pumps
Instruction Manual MC 1.4.44
DO NOT INSTALL, OPERATE, OR
SERVICE THIS PUMP
BEFORE READING THE ENTIRE MANUAL

INDEX
Product Inspection and Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Receiving Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Mechanical Design Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Application and Reapplication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Pump Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Baseplate Mounting and Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Suction and Discharge Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Pump and Driver Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Allowable Piping Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Small Piping Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Pump Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Mechanical Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Starting the Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Pump Start-Up Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Ordering SpareParts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Pump Section Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Disassembly and Reassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
1

2
The Products of Dean Pump Division are subject to thorough and
rigorous quality control and inspection procedures throughout the
whole of the manufacturing process to assure proper operation in
full conformity with established performance standards. On
completion of inspection, each unit is sprayed internally with rust
inhibitor (if material is subject to atmospheric corrosion),
sealed against the entrance of dirt, and tagged with a signed
certificate of inspection prior to shipment. Each pump when shipped
is ready to perform the service for which it was designed
with minimum maintenance and expense if properly installed and
operated in accordance with the instructions furnished.
PRODUCT INSPECTION AND TEST
Read the instruction manual completely before installing, filling,
operating, or maintaining this equipment.
Obtain, read and heed the MSDS (Material Safety Data Sheet) for
the fluids being handled before attempting to fill, operate or main-
tain this equipment. Obtain instructions from the Safety Engineer
responsible for your facility before performing any work on the
pumping equipment and systems.
Proper storage while not in use and proper installation and startup
are essential for successful pump operation. Misuse or improper
storage, installation or operation of pumps may result in serious loss
or damage. Dean Pump Division is not responsible for any loss or
damage resulting from causes beyond its control, and is not liable
for charges for work performed or materials furnished to repair such
loss or damage.
All installation, operation, and maintenance must be done by thor-
oughly qualified personnel in strict accordance with this manual and
must comply with all local, state and Federal codes. Only Dean
authorized service parts must be used in the repair of these pumps.
RECEIVING PUMP
When the pump is received from the transportation company it
should be promptly inspected for damage and such damage noted
on the bill of lading before it is signed. Claims for shipping damage
must be filed against the carrier.
Care must be exercised in unloading and handling the pump.
STORAGE
Pumps must be properly covered and protected against moisture,
dirt, and physical damage during storage prior to installation.
If prolonged storage is anticipated, do the following:
1) Remove the vapor eliminator from the pipe tee into which it
is mounted. Wrap and box the vapor eliminator and store it
in a clean dry place.
2) Seal the suction opening of the pump with a blind flange,
gasket, and bolts.
3) Fill through the discharge opening of the pump with a
corrosion inhibiting liquid that is also compatible with the
liquid that will later be pumped. Evaluation of compatibility
must include consideration of the temperatureat which the
system will later operate. Fill the pump until the liquid flows
from the pipe tee from which the vapor eliminator was
removed. Plug the top of the pipe tee with a NPT pipe plug.
4) Continue filling through the discharge opening until the
pump is completely filled.
5) Seal the discharge opening with a blind flange, gasket,
and bolts.
6) Remove the pumpage leak detection pipe from the bottom of
the bearing housing. Apply pipe sealant to a 3/8” NPT pipe
plug, and tighten it into this opening. Save the pipe that was
removed, so that it may be re-installed when the pump is
placed into service.
7) Remove the gland vent plug from the top of the bearing
housing and fill the gland cavity, through this opening, with
astandard SAE 10 weight oil. When full, replace the 3/8”
NPT pipe plug.
8) Remove the bearing end cover (28) and fill the center
pocket of the end cover with the grease described under
“PUMP LUBRICATION”. Replace and securethe end cover.
9) Apply a heavy protective coating to all exposed machined
surfaces. A rust preventive must be used to protect all steel
and iron parts.
10) Rotate the pump shaft “by hand” each month. Wear heavy
gloves when rotating the shaft to protect your hands.
When you are ready to place the pump in service;
1) Remove the bearing end cover (28). Remove and discard
about one half of the grease that is in the end cover. Replace
and securethe end cover (see assembly instructions). Be sure
to comply with all government regulations in the disposal of
the grease.
2) Remove the plug that was installed into the pumpage leak
detection connection. Drain and discardthe storage liquid.
Re-install the leak detection pipe. Be sure to comply with all
governmental regulations in disposal of the storage liquid.
3) Remove and discard the discharge bolts, nuts, blind flange,
and gasket. Remove the casing drain plug. Remove and
discard, the NPT plug from the top connection of the pipe tee
(into which the vapor eliminator mounts). Drain and discard
the storage liquid. Remove and discard the suction bolts,
blind flange, and gasket. Stand the pump up on its
suction flange to allow residual liquid to drain. Flush all
remains of the storage liquid from the pump. Use a flush
liquid that is compatible with the pumpage, as any flush
liquid remaining in the pump when it is placed in operation,
will be exposed to the operating temperatures and pressures.
Vapor pressure is “one” of the critical properties to be
considered. Be sureto comply with all governmental
regulations in disposal of the storage liquid, flush liquid,
and gaskets.
WARNING
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.

ALLOWABLE WORKING PRESSURE VS. PUMPING TEMPERATURE
WARNING:
Be sure that there is nothing remaining in the pump that could
react with the liquid that will be pumped or that would have an
excessive vapor pressure at the system operating temperature.
4) Replace the vapor eliminator. Place pipe sealant onto
the threads of the pipe nipple, and tighten the vapor
eliminator onto the top of the piping rising from the vent
tee. Install the vapor exhaust tube into the connector on
top of the vapor eliminator.
5) Replace the casing drain plug.
6) Remove the “storage” protective coating from the external
surfaces of the pump.
Pumps must also be protected from moisture, dirt, and physical
damage, during and after installation while the system is
being completed. Pumps “stored” on their foundations must be
completely checked for proper installation prior to start-up.
Care in storage and installation will preserve the built-in
quality of each Dean Product.
RWA SERIES
FAN COOLED, HORIZONTAL, SINGLE STAGE, END SUCTION, ENCLOSED IMPELLER, CENTRIFUGAL, HOT WATER PUMPS. THESE PUMPS
ARE DESIGNED SPECIFICALLY FOR USE WITH HOT WATER, ETHYLENE GLYCOL, PROPYLENE GLYCOL AND TRIETHYLENE GLYCOL.
THESE PUMPS WILL NOT WORK ON OTHER LIQUIDS.
3
MECHANICAL DESIGN SPECIFICATIONS
PUMP TYPE
Seal chamber pressure equals pump suction pressure plus .06 x developed head.
Casing Thickness, Minimum
Corrosion Allowance
Impeller Balance –
Standard
Optional Extra
Flanges
ANSI Class
Facing
Finish
Suction Pressure, Maximum
Horsepower Rating, Maximum
@3500 RPM
@1750 RPM
@1150 RPM
Bearings:
Thrust Bearing, Ball Type, Grease Lubricated
Rarial Bearing, Sleeve Type, Pumpage Lubricated
Seal Chamber Dimensions
Length (Depth)
Inside Diameter (Bore Dia.)
Shaft Diameter
Pump Shaft Dimensions
Span Between Bearings
Span Between Radial Bearing Centerline
and Impeller Centerline
Diameter at Coupling
Diameter Between Bearings
Diameter at Impeller
L3/D4
Material Class
Maximum Working Pressure
Direction of Rotation (Viewed from Coupling End)
RWA 2096 RWA 4166 RWA 4206
CW CCW CCW
5/16"
1/8"
Single Plane
Dynamic
150
Flat Face
125 Ra
100 PSIG
Pumping Temperature
Minimum
35
15
10
5306 2RS
Double Row
Maximum Ambient Temperature
(temp. within 12” of the pump)
Hydrostatic Test Pressure
15/8"
21/16"
11/8"
811/16"
15/8"
7/8"
15/16"
3/4"
4.3
22
(Ductile Iron)
250 PSIG
@100°F
-20°F @
250 PSIG
320°F @
210 PSIG
Maximum
118°F
430 PSIG 700 PSIG 700 PSIG
118°F118°F
5/16"5/16"
1/8"1/8"
Single Plane
Dynamic Single Plane Dynamic
300
Raised Face
125 Ra
300
Raised Face
125 Ra
260 PSIG 260 PSIG
100
40
25
250
125
75
7308 BG
Angular
Contact Pair
7311 BG
Angular
Contact Pair
213/16"
31/8"
2"
37/8"
45/16"
21/2"
117/16"
25/16"
11/8"
19/16"
11/8"
145/8"
31/4"
15/8"
17/8"
11/2"
2.1 2.8
-20°F
400°F
-20°F
400°F
450 PSIG 450 PSIG
22
(Ductile Iron) 22 (Ductile Iron)
Part No. Part Name RWA 2096 RWA 4166 RWA 4206
Class 22 Class 22 Class 22
3 Impeller C.I. (1) C.I. (1) C.I. (1)
4 Impeller Key Steel (2) Steel (2) Steel (2)
5Casing D.I. (10) D.I. (10) D.I. (10)
5A Casing Drain Plug Steel (2) Steel (2) Steel (2)
5C Casing Stud Nut N.A. Steel (5) Steel (5)
5D Casing Stud/Cap Screw Steel (3) Screw Steel (4) Stud Steel (4) Stud
6A Casing Ring (only some sizes) N.A. Iron (7) Iron (7)
9 Bearing Housing Foot Steel (2) Steel (2) Steel (2)
*10 Shaft Sleeve N.A. 316 S/S 316 S/S
*12 Impeller Bolt/Nut Steel (2) Nut Steel (2) Bolt Steel (2) Bolt
*12A Impeller Washer Steel (2) Steel (2) Steel (2)
*13 Mechanical Seal Gland Steel (2) Steel (2) Steel (2)
*25A Shaft Bearing – Thrust – Ball Double Row Angular Angular
Contact Pair Contact Pair
26 Bearing Housing D.I. (10) D.I. (10) D.I. (10)
*28 Bearing End Cover C.I. (1) Steel (2) D.I. (9)
*29 Pump Shaft 11-13 S/S 11-13 S/S 11-13/316 S/S
(12) (12) S/S (8)
*31 Thrust Bearing Lock Nut N.A. Steel (2) Steel (2)
*31A Thrust Bearing Lock Washer N.A. Steel (2) Steel (2)
56 Casing Foot N.A. C.I. (1) C.I. (1)
*75 Snap Ring N.A. Steel (2) N.A.
*75A Snap Ring Steel (2) N.A. N.A.
*76 Grease Seal – Front Viton (13) Viton (13) Viton (13)
*76A Grease Seal – Rear N.A. Buna (14) Buna (14)
77 Casing Gasket Teflon (11) Teflon (11) Teflon (11)
*77A Sleeve Gasket N.A. Aflas) Aflas
*77B Bearing End Cover Gasket N.A. Buna (14) Buna (14)
*95A Mechanical Seal Stationary Silicon Carbide Silicon Carbide Silicon Carbide
&Aflas & Aflas & Aflas
*95B Mechanical Seal Rotary S/S, Carbon, S/S, Carbon, S/S, Carbon,
&Aflas &Aflas & Aflas
98 Coupling Guard Steel (2) Steel (2) Steel (2)
*120 Fan Aluminum Aluminum Aluminum
*121 Fan Collar N.A. Steel (2) Steel (2)
*122 Fan Clamp Ring Steel (2) Steel (2) Steel (2)
*180 Radial Bearing Cartridge Carbon & Carbon & Carbon &
Steel &Steel 416 S/S
*325 Seal Gland Gasket Aflas (13) Aflas (13) Aflas (13)
*370 Sleeve Set Screw N.A. 18-8 S/S 18-8 S/S
*375 Anti-Rotation Pin N.A. N.A. 316 S/S
MATERIAL SPECIFICATIONS (REFER TO NUMBERS IN PARENTHESES)
*Denotes parts interchangeability in all pump sizes of a given series.
STANDARD MATERIALS OF CONSTRUCTION
(1) Cast Iron (9) Ductile Iron – ASTM A536
(2) AISI 1020 (10) Ductile Iron – ASTM A395
(3) SAE Grade 5 or ASTM A449 Type 1 Steel (11) Teflon® Elastomer
(4) AISI 4140, ASTM A193-B7 Steel (12) ANSI 420 S/S
(5) ASTM A194 Grade 2 Steel (13) Viton® Elastomer
(7) Hardened Iron (14) Buna N Rubber
(8) ANSI 316 S/S with ANSI 416 S/S
at the sleeve bearing
Viton® is a registered Trademark of E. I. DuPont Co.
Teflon® is a registered Trademark of E. I. DuPont Co.

Obtain MSDS data sheets for all liquids (from the manufacturers of
those liquids) being used with the pump, and heed all cautions.
Always wear the appropriate protective apparel when working on
or around the pumping equipment. Safety glasses with side shields,
heavy work gloves (use insulated work gloves when handling hot
items), steel-toed shoes, hard hat, and any other protective gear as
needed for protection. One example of other gear would be
breathing apparatus when working near toxic materials. Use lifting
devices, manufactured expressly for the purpose of lifting, to move
the pumping machinery. Do not attempt to lift the assembly or its
components manually. Use only devices with lifting capabilities in
excess of the weight of the unit being lifted. Inspect straps, chains,
hooks, etc. for damage and lifting capability before use.
Personal injury, death, and/or equipment damage could occur if
good lifting practices are not used.
APPLICATION AND REAPPLICATION
At the time of installation, the equipment received should have
already been selected for the service required. You must read the
paperwork for the installation and check the serial number of the
pump to assure that you are installing the correct pump into the ser-
vice for which it was selected.
Many pumps look identical from the outside but can be made of dif-
ferent materials and/or be constructed differently inside. Personal
injury, death, equipment damage, product (pumpage) damage,
and/or product loss could occur if the incorrect pump is installed.
Do not transfer an existing pump to any other service conditions
until you have thoroughly reviewed the pump construction, materi-
als, sizing, sealing, pressure containing capability, head/capacity
capability,and temperature capability with respect to the required
service. Consult your Dean Pump sales engineer with all the service
requirements and a full description of the existing pump (including
the serial number), seal, and sub-systems so that we can assist you
in a successful reapplication.
PUMP FOUNDATION
The pump foundation provides rigid support to the baseplate and
maintains the exact alignment of the pumping unit. Baseplates are
designed to rigidly support the pump and driver without vibration
or distortion only when they are properly set, leveled, and secured
to the foundation.
The purchaser may elect to mount the pump without grouting the
baseplate. In any case the baseplate must be fully supported by the
customer’smounting means to prevent vibration and distortion.
BASEPLATE MOUNTING AND ALIGNMENT
The sequence of mounting which must be observed for proper base-
plate and pump mounting is:
1) Place baseplate, with pump and driver mounted thereon, on
the pump foundation.
2) Use wedges under the baseplate edges, at each foundation
bolt, to properly support and level the unit. Check this with
aspirit level. Pull down the baseplate mounting bolt nuts
tightly and recheck for level. Correct if necessary.
3) Align the driver to the pump. See “Pump and Driver
Alignment’’ on page 5.
4) Grout the baseplate. Do not grout the baseplate to the foun-
dation until the pump and driver are correctly aligned.
Channel type baseplates are made with open ends to allow
easy grouting and do not require grouting holes in the base-
plate. Fabricated structural steel baseplates are provided
with grouting holes. Fill the entire void under the baseplate
with grout and firmly embed the baseplate edges.
5) Install “new” gaskets, of the correct material for the service,
and the correct size per ASME B16.20, or ASME B16.21
at the suction and the discharge flanges of the pump. Use
only new gaskets.
Connect the suction and discharge piping without forcing
the piping into position. See “Suction and Discharge Piping”
on page 5. The pipe flanges must line up with the pump
flanges “freely”.
Install a “new” bolt, of the correct size per ASME/ANSI
B16.5, in every bolt hole. Tighten all bolts evenly. Use only
new uncorroded fasteners.
WARNING:
Strain caused by “forcing”, improper flange bolting, and/or mis-
alignment may cause failure of the pumping unit, flanges, piping
and/or fluid (pumpage) release which could cause personal injury,
death, and/or damage to this and/or other equipment.
WARNING:
Make sure that all piping is installed into its correct connection.
Installation of a pipe into an incorrect location could result in an
explosion and personal injury or death as well as damage to this
and/or other equipment.
Install pressure relief valves in any cavities that could be subjected
to pressures in excess of the allowable working pressure. Explosion,
personal injury, death, and/or damage to this and/or other equip-
ment may occur if pressure exceeds allowable.
6) Recheck the alignment between the driver (motor, turbine, or
engine) and pump shafts. Installation of piping may have
forced the pump out of alignment. If so, correct the piping to
remove the distorting load, and realign the pump and driver..
7) The pump and driver alignment must again be checked at
the operating temperatureand alignment corrected under
the hot condition.
8) After about two weeks of normal pump operation the pump
and driver alignment should again be checked under the hot
condition. If alignment is still correct, the driver feet may be
doweled to the baseplate. If the alignment has changed,
realign the unit and recheck after two weeks.
INSTALLATION
TYPICAL FOUNDATION LAYOUT
4

SUCTION AND DISCHARGE PIPING
Suction and discharge nozzle sizes of Dean pumps are selected for
proper performance of the pumping unit and are not intended to
determine the suction and discharge pipe sizes. Pipe sizes must be
determined by the user based on the system requirements.
Suction piping should have a minimum friction loss and thus should
beas short and straight as possible with a pipe diameter as large
aseconomically feasible for the flow rate handled.
Suction piping should never be smaller in diameter than the suction
nozzle size. When the suction piping is larger than the suction noz-
zle size an eccentric reducer is required at the suction flange and
must be installed with the taper located on the underside to elimi-
nate air or vapor pockets. The section of piping attached to the suc-
tion flange of the pump should be straight for a length of eight pipe
diameters or more.
Discharge piping may be the same size as, larger, or smaller than
the discharge nozzle as the system flow may demand.
In new installations or rebuilt systems, dirt, pipe scale, welding slag,
and general construction debris may get into the piping. It is impor-
tant to prevent this material from entering the pump and damaging
pump parts, bearings, mechanical seal faces, or lip seals. Bearings,
mechanical seals and lip seals are especially subject to damage
even by verysmall particles. Toprevent damage, a strainer or filter
installed in the suction line is recommended. Commercially avail-
able strainers or filters as recommended by their manufacturers can
do an excellent job.
experienced. Failure to properly align the unit will result in
vibration, short bearing life, and reduced mechanical seal life.
Pumps are not constructed to be used as pipe anchors. Both suction
and discharge piping must be supported independently of the
pumping unit and thermal expansion joints provided to guard
against expansion loads on the pump. Pipes should be anchored
between the expansion joint and the pump and as closely to the
pump as possible. Failure to provide proper piping support and
expansion joints may impose strains on the pumping unit which will
result in serious misalignment. Maximum allowable piping loads
are shown on page 7 in this manual.
No allowance for thermal expansion is made for motor driven units
in mounting the driver. Allowance for turbine mounting should be in
accordance with the turbine manufacturer’s recommendations.
Final alignment must always be checked and corrected at the
operating temperatures of the pump and driver.
Misalignment of the two shafts is of two kinds. The first of these is
angular misalignment where the axis of one shaft is at an angle
from the other. The other is offset alignment where the center of one
shaft is offset from the center of the other shaft. These effects usual-
ly occur together so that both angular and offset misalignment are
present.
Coincident alignment of the driver and pump shaft is measured at
the faces of the coupling hubs.
The pump was shipped with the coupling spacer not installed, to
allow alignment and motor rotation check. If, however, someone
has installed this spacer assembly, remove it at this time.
To one of the coupling hubs, either on the motor shaft or the pump
shaft, attach a dial indicator.Mount the indicator so that the
indicator button rides on the face of the other coupling hub near the
outside diameter of the hub. Reference the illustration “INDICATOR
SETUP TO READ ANGULAR MISALIGNMENT” below. Rotate the
shaft to which the dial indicator is clamped, allowing the indicator
button to ride on the face of the stationary hub. The indicator dial
movement will show the difference in the distance between the two
hubs. This indicates the amount of angular misalignment between
the hubs and therefore the shaft axes. Good practice suggest align-
ment to within 0.002" T.I.R. (Total Indicator Reading).
TYPICAL PUMP PIPING
Suction line screens or strainers may usually be removed when,
after several days of use, no dirt has been collected and the system
is clean.
Remember that screens and filters in the suction line are restricting
devices which reduce the net positive suction head (NPSH) avail-
able to the pump and should be considered at the time the system
is designed.
PUMP AND DRIVER ALIGNMENT
Proper running life of a pump and driver unit depends on the accu-
racy with which the axis of the driver shaft coincides with the axis
of the pump shaft when the unit is running. Although pumps and dri-
vers arecheck aligned at the factory,this is only to confirmthat the
unit can be aligned in the field as handling during shipment and
installation will cause the alignment to change.The pump and dri-
ver alignment must always be checked and corrected before the
baseplate is grouted to the foundation and again before the pump
is first started. If the baseplate mounting instructions have been
carefully followed, no difficulties in making the alignment should be
INDICATOR SETUP TO READ ANGULAR MISALIGNMENT
5

6
To check the offset alignment, mount the dial indicator as shown in
the illustration “INDICATOR SETUP TO READ OFFSET MISALIGN-
MENT” below, with the indicator button on the outside diameter of
the stationary hub, near the face of the hub closest to the end of the
shaft. Rotate the shaft, to which the dial indicator is clamped, allow-
ing the indicator button to ride on the outside diameter of the sta-
tionary coupling hub. The indicator dial movement will show the dif-
ference in the center locations of the two shafts. Good practice sug-
gest alignment to within 0.002" T.I.R.
Angular and offset alignment is adjusted by moving the motor side-
ways and up and down to bring the motor into exact alignment
with the bolted down pump. The motor is moved up and down by
adding and removing thin metal shims between the motor feet and
the baseplate. If misalignment is of major proportions, the base-
plate has been improperly installed on the foundation and must be
releveled before proceeding with alignment.
After each change, it is necessary to recheck both angular and off-
set alignment of the coupling. After the pump and driver are
aligned, tighten all hold-down bolts and then recheck alignment.
The closer the running alignment, the longer the running life will be.
INDICATOR SETUP TO READ OFFSET MISALIGNMENT

SMALL PIPING CONNECTIONS FOR “RWA” PUMPS
7
ALLOWABLE PIPING LOADS FOR RWA2096, RWA4166 AND RWA4206 PUMPS
MAXIMUM FORCES ON FLANGES
FOR SUCTION FLANGE
+/-Fx≤200 LBS./NOM.IN. ≤1.2W
+/-Fy≤130 LBS./NOM.IN. ≤0.6W
+/-Fz≤160 LBS./NOM.IN. ≤1.0W
Fr=(Fy2+ Fz2)1/2 ≤2000 LBS
FOR DISCHARGE FLANGE
+/-Fx≤160 LBS./NOM.IN. ≤1.3W
-Fy≤200 LBS./NOM.IN. ≤1.2W
+Fy≤100 LBS./NOM.IN. ≤0.5W
+/-Fz≤130 LBS./NOM.IN. ≤1.0W
Fr=(Fx2+ Fz2)1/2 ≤2000 LBS
WHERE
F=FORCE IN POUNDS
Fr=RESULTANT FORCE
W=WEIGHT OF PUMP ONLY, IN POUNDS
Wt.-Lbs. MXMYMZ
Pump Size Pump Only lb. ft. lb. ft. lb. ft.
RWA2096 1X11/2X6 105 278 192 91
RWA2096 11/2X3X6 115 277 265 91
RWA2096 1X11/2X8 125 278 132 91
RWA4166 1X3X81/2195 690 340 725
RWA4166 11/2X3 X81/2220 690 340 725
RWA4166 2X3X81/2245 690 340 725
RWA4166 3X4X81/2270 725 295 600
RWA4166 4X6X81/2310 785 320 600
RWA4166 11/2X3X10 240 760 310 600
RWA4166 2X3X10 275 760 310 600
RWA4166 3X4X10 305 830 340 600
RWA4166 4X6 X10#2 345 950 340 600
RWA4206 4X6 X10#1 460 2300 1850 800
MAXIMUM MOMENTS APPLIED TO A PUMP ON A FULLY BOLTED AND GROUTED BASEPLATE. LOADS ARE TO BE
APPLIED ONLY THROUGH THE SUCTION AND DISCHARGE FLANGES.
Maximum allowable forces and moments
calculated from these force equations or the
tabulated moment tables are those resulting in
amaximum of .010 inch movement of the
shaft measured at the shaft coupling when the
pump is mounted on its baseplate and that
baseplate is fully bolted to a properly
designed foundation and is fully grouted in
place. For a full discussion see API Standard
610, 5thEdition.
DATASHEET #1198H
VAPOR EXHAUST
PUMPAGE LEAK
PROTECTION
VAPOR
ELIMINATOR
SEAL VENT PLUG
CASING DRAIN PLUG
GREASE RELIEF PLUG
(NOT ON RWA2096)
GLAND VENT PLUG
DISCHARGE
FLANGE
SUCTION
FLANGE
Fy
Fy
Fz
Fz
Fx
Fx
Mx
My
Mz

8
BEARINGS
The radial bearing (180) is lubricated by the liquid being pumped
and therefore needs no external lubrication.
The thrust bearing(s) (25A) are grease packed “for life” and require
no further lubrication until the pump is rebuilt.
The RWA2096 uses a “sealed for life” bearing that is packed with
grease by the ball bearing manufacturer.
The RWA4166 and RWA4206 have ball bearings that are hand
packed as an assembly procedure when the pump is assembled.
The grease is a lithium12-hydroxysterate soap-thickened grease
that has rust inhibitors and extreme pressure additives. This is a
NLGI, Grade 2, similar to:
Shell Oil Company’s “Alvania” Grease #EP2
or
Union Oil of California’s “Unoba EP” Grease Grade 2
Grease is also available from Dean Pump in individual containers.
one container is required for a RWA4166 pump. Two containers
are required for a RWA4206 pump. Order “RA3000” Grease #2
for bearing lubrication.
PUMP LUBRICATION
MECHANICAL SEAL
The “RWA” pumps are arranged with a mechanical face seal
(95A and 95B) that was specifically selected for sealing hot
water, hot solutions of ethylene glycol in water, hot solutions of
propylene glycol in water, and hot solutions of triethylene glycol
in water. The mechanical seal faces are lubricated by the liquid
being pumped – it is therefore necessary to have liquid at the
mechanical seal faces at all times. To accomplish this, the
mechanical seal cavity of the pump must be vented when
filling the pump with liquid (see FILLING below) to allow the seal
cavity to also fill with liquid.
When operating, these liquids may vaporize at the seal faces,
this vapor will be removed by the vapor eliminator mounted on
the top of the pump.
WARNING:
Vapor emitting from the vapor exhaust may be hot.
It is important that a pump should never be subjected to thermal or
pressureshock. The liquid should therefore be allowed to flow into
the casing slowly. A centrifugal pump should never be started until
all the parts are up to the temperature of the liquid to be pumped.
FILLING
The pump was shipped with the vapor eliminator and vapor
exhaust tube not installed. Do not install these until so directed.
WARNING:
Before filling the pump with liquid, check to see that all possible
leak locations aresealed. See that all of the connections into the
pressure containing cavity are sealed or connected to a related
piping system that also has all possible leak paths sealed. Do not
plug the pumpage leak detection connection, this must be left open.
Use a wrench on all bolted joints to apply torque to assure that all
gaskets are sealed in a tight joint. Check to see that all threaded
pipe connections are also tight enough to seal the liquid pressure
that will be applied when the system is started.
WARNING:
Filling directions below refer to venting of “air” to the atmosphere,
but dependent upon the physical properties of the liquid intended
to be pumped, temperature, pressure, and other variables related
to the system and its operational requirements, this may not be
allowed by federal or local regulations, or may not be acceptable
for whatever other reasons. Consult your plant or corporate safety
engineer for instruction on possible required procedures for the
specific liquid, operating conditions and legal requirements.
When the source of the liquid to be pumped is below atmospheric
pressure or located below the pump, the filling may be ac-
complished in any of several ways, three of which are listed below:
1) An exhauster may be connected to the discharge piping
between the pump and the discharge isolation valve. With the
discharge isolation valve closed and the suction valve open,
the air can be exhausted from the pump and the suction pip-
ing. When all the air has been removed, close the suction
valve, remove the exhauster, plug the access port where the
exhauster was connected, and then open the discharge valve.
Remove the pipe cap from the top of the pipe rising from the
pipe tee which also contains the seal vent plug, refer to the
“Small Piping Connections” drawing on page 7. Discard the
pipe cap. Allow the air to flow from this port until the pumpage
starts to flow. This could take considerable time as the radial
bearing clearance, through which the liquid must flow, is quite
small. Several minutes is not unusual although sometimes it
may vent in less than a minute. If the pump is a “RWA2096”,
use a funnel and fill the seal cavity through this connection with
clean pumpage. Install the vapor eliminator assembly into the
top of the pipe through which you wereventing. Install the
vapor exhaust tubing into the top of the vapor eliminator. Refer
to the “Small Piping Connections” drawing on page 7.
At any time in the future, when the system is drained and the
pump needs filling, follow the above procedure except remove
the seal vent plug to vent the seal cavity and leave the vapor
eliminator intact.
2) With a foot valve installed in the suction piping, the pump may
be filled with pumpage introduced somewhereabove the
pump in the discharge piping. A foot valve may create exten-
sive losses and therefore must be allowed for in calculation of
the available NPSH. When the pump is filled, plug the port
through which you were filling. Remove the pipe cap from the
top of the pipe rising from the pipe tee which also contains the
seal vent plug (refer to the “Small Piping Connections” draw-
ing on page 7). Discard the pipe cap. Allow the air to flow
from this port until the pumpage starts to flow. This could take
considerable time as the radial bearing clearance, through
which the liquid must flow, is quite small. Several minutes is not
unusual although sometimes it may vent in less than a minute.
If the pump is a “RWA2096”, use a funnel and fill the seal cav-
ity through this connection with clean pumpage. Install the
vapor eliminator assembly into the top of the pipe through
which you were venting. Install the vapor exhaust tubing into
the top of the vapor eliminator. Refer to the “Small Piping
Connections” drawing on page 7.
At any time in the future, when the system is drained and the
pump needs filling, follow the above procedureexcept remove
the seal vent plug to vent the seal cavity and leave the vapor
eliminator intact.
STARTING THE PUMP

9
3) A vacuum pump (preferably a wet vacuum pump) may be
used for evacuating air from the pump and piping. The vacu-
um pump should be connected, as is the exhauster covered in
No. 1 on page 8, and the procedure is the same.
When the source of the liquid to be pumped is above atmospheric
pressure or above the pumps discharge flange, the pump may be
filled by venting through a bleed-off line to the atmosphere. When
the source of the liquid is above the pump’s discharge flange, the
venting could be back to the suction source, instead of to the atmos-
phere. When all of the air has been expelled through the bleed-off,
seal it. Remove the pipe cap from the top of the pipe rising from the
pipe tee which also contains the seal vent plug (refer to the “Small
Piping Connections” drawing on page 7). Discard the pipe cap.
Allow the air to flow from this port until the pumpage starts to flow.
This could take considerable time as the radial bearing clearance,
through which the liquid must flow, is quite small. Several minutes
is not unusual, although sometimes it may vent in less than a minute.
If the pump is a “RWA2096”, use a funnel and fill the seal cavity
through this connection with clean pumpage. Install the vapor elim-
inator assembly into the top of the pipe through which you were
venting. Install the vapor exhaust tubing into the top of the vapor
eliminator. Refer to the “Small Piping Connections” drawing on
page 7.
At any time in the future, when the system is drained and the
pump needs filling, follow the above procedure except remove the
seal vent plug to vent the seal cavity and leave the vapor
eliminator intact.
It is most important to check the direction of rotation of the pump
before allowing the pump to come up to speed. The pump was
shipped with the coupling spacer not installed to allow alignment
and motor rotation direction check. If, however, someone installed
this spacer assembly, remove it at this time.To check rotation direc-
tion, push the starting button and instantly push the stop button. This
will allow the motor to turn over a few revolutions and the direction
of rotation to be observed. A direction of rotation arrow is shown
on the front of the pump casing. If rotation is incorrect, change the
wiring connections and recheck rotation. Operating the pump in
reverse rotation may cause extensive damage.
WARNING:
Lock-out the power to the driver (motor, turbine, engine, etc.) install
the shaft coupling spacer. Be sure that you install all the retaining
devices and bolts and that they are tight. Read and comply with the
coupling manufacturer’s instructions. Personal injury, death, and/or
equipment damage could occur if the coupling spacer is not prop-
erly installed. Remove all debris and tools from the area near the
shafts and the shaft coupling. Do this to assure that nothing is
caught and thrown by the rotating parts when the pump is started.
Bolt the coupling guard securely to the baseplate, checking to
assure that it is not contacting any parts that will rotate when the
pump is started.
OPERATING
WARNING:
Before starting the unit, see that all personnel are a safe distance
away from all possible hazards, that all sub-systems are connected
and operating, that all debris has been removed, that the shaft
coupling guard is securely in place, and that the pump is full
ofliquid.
Do not operate this pump at shut-off (no flow) as an explosion may
result. This can occur with any liquid, even “cold water”. Personal
injury, death, equipment damage, and/or loss of product
(pumpage) is likely to occur. If your system is operated where it is
possible for all outlets of the discharge from the pump to be closed
while the pump is still operating, a modification of the system needs
to be made to assure a continual flow of pumpage through the
pump. NOTE: Some people have a belief that a bypass line from the
discharge side of the pump to the suction side of the pump will
relieve this problem, this is “NOT TRUE”; DO NOT ATTEMPT THIS.
WARNING:
Do not operate a pump at a low flow condition, unless provision has
been made to prevent dangerous heat build up within the pump
casing. The liquid in the pump will heat up and this may result in
high pressure in the pump in a short time. Such pressure may result
in a rupture of the pressure-containing parts and cause severe haz-
ard to personnel and/or damage to the system.
Acentrifugal pump should never be run without liquid In the cas-
ing. Extensive damage may result, particularly to the bearing or the
mechanical seal. Vent or fill the pump seal chamber through the seal
vent connection to provide lubrication to the mechanical seal faces.
If the pump is a “RWA4166” or a “RWA4206”, remove the bear-
ing grease relief plug from the bottom of the bearing end cover
(28). Replace the coupling guard and securely fasten it in place.
Make surethat the coupling guardis installed with the expanded
metal section nearest the motor,as shown on the Sectional
Assembly drawings on page 11.
Acentrifugal pump should be started with the suction valve
fully open and the discharge valve opened a slight amount. Start
the pump.
As soon as the pump is up to speed, the discharge valve must be
opened slowly.Acentrifugal pump cannot be operated with the
discharge valve closed without heating up dangerously. During the
first several minutes of operating watch the pump carefully for over-
heating, vibration, and other abnormal conditions. If trouble
develops, stop the pump at once and correct the problem.
If the pump is a “RWA4166” or a “RWA4206”, stop the pump after
about thirty minutes of operation, replace the grease relief plug into
the bottom of the bearing end cover (28) and tighten to 7 ft. lb.
Replace the coupling guard and securely fasten it in place.
Make surethat the coupling guardis installed with the expanded
metal section nearest the motor, as shown on the Sectional
Assembly drawings on page 11.
Restart the pump.

10 1
These points must be checked after pump installation and before
starting up the pump.
1) Read instruction manual thoroughly and understand it.
2) Review pump order head sheet for the service rating of the
pump and any special features.
3) Check to see that the seal chamber has been vented.
4) Check all piping connections making certain that they are both
tight and in the proper places. All piping includes the small
piping described on page 7.
5) Make sure that the baseplate has been properly installed.
6) Check to see that the motor is of the fan cooled type. A
fan cooled motor is necessary for successful operation of
the pump.
7) Check the electrical connections to the driver.
8) Break the coupling by removing the coupling spacer and
bump the motor starting button to check motor rotation.
Operating the pump in reverse rotation may cause
extensive damage. If driver rotation is correct, replace the
coupling spacer. If not, connect the wiring for proper rotation
and recheck.
9) Check the coupling for proper alignment. Realign if necessary.
10) Check to be sure that the pumpage leak detection connection
is open for proper operation.
11) Rotate the pump shaft by hand to be sure that there is no
binding or rubbing within the pump or driver. Wear heavy
gloves to protect your hands. Correct any problems
before proceeding.
12) Remove the bearing grease relief plug, if the pump is a
RWA4166 or a RWA4206.
13) Remove all dirt, waste, tools, and construction debris from
the area.
14) Check to see that the coupling guard is fastened securely
in place.
PUMP START-UP CHECKLIST

11 1
To avoid prolonged down time and facilitate rapid repair of dam-
aged pump parts, Dean recommends that the pump user maintain
aminimum stock of spare parts. If the pump service is critical, a
spare parts stock is even more important to the user. Such spares
inventory may extend from a spare mechanical seal through com-
plete impeller-bearing housing assemblies prepared for immediate
insertion in the pump casing. Consult your Dean representative who
will assist you in selecting your spares stock.
ORDERING SPARE PARTS
Spare part orders will be handled with a minimum delay if the
following information is furnished by the customer with the order:
1) Give the pump serial number and size. These may be found on
the pump name plate. The serial number is also stamped on
the suction flange of the pump.
2) Give the part name, part number, and material of part. These
should agree with the standard parts list.
3) Give the quantity of each part required.
4) Give complete shipping instructions.
SPARE PARTS
Part # Part Name
26 Bearing Housing
28* Bearing End Cover
29* Pump Shaft
31* Thrust Bearing Lock Nut
(Only on RWA4166 & RWA4206)
31A* Thrust Bearing Lock Washer
(Only on RWA4166 & RWA4206)
56 Casing Foot
(Only on RWA4166 & RWA4206)
75* Snap Ring (Only on RWA4166)
75A* Snap Ring (Only on RWA2096)
76* Grease Seal – Front
76A* Grease Seal – Rear
(Only on RWA4166 & RWA4206)
77 Casing Gasket
Part # Part Name
77A* Sleeve Gasket
(Only on RWA4166 & RWA4206)
77B* Bearing End Cover Gasket
(Only on RWA4166 & RWA4206)
95A* Mechanical Seal Stationary
95B* Mechanical Seal Rotary
98 Coupling Guard
120* Fan
121* Fan Collar
(Only on RWA4166 & RWA4206)
122* Fan Clamp Ring
180* Radial Bearing Cartridge
325* Seal Gland Gasket
370* Sleeve Set Screw
(Only on RWA4166 & RWA4206)
375* Anti-Rotation Pin
(Only on RWA4206)
Part # Part Name
* Denotes parts interchangeablility in all pumps of the
same series (i.e. RWA2096, RWA4166, or RWA4206)
3Impeller
4*Impeller Key
5Casing
5ACasing Drain Plug
5C Casing Stud Nut (RWA4166 & RWA4206)
5D Casing Stud (RWA4166 & RWA4206)
Casing Capscrew (RWA2096)
Casing Ring (only some sizes)6A
Bearing Housing Foot9
Shaft Sleeve (RWA4166 & RWA4206)10*
Impeller Bolt (RWA4166 & RWA4206)
Impeller Nut (RWA2096)
12*
Impeller Washer12A*
Mechanical Seal Gland13*
Thrust Bearing
(Pair – RWA4166 & RWA4206)
(Double – RWA2096)
25A*
SECTIONAL ASSEMBLY DRAWING – 01968
RWA2096

11A
SECTIONAL ASSEMBLY DRAWING – 01964
RWA4166
SECTIONAL ASSEMBLY DRAWING – 01967
RWA4206

12 1
WARNING:
Work must be performed only by thoroughly trained and quali-
fied personnel to assure quality repair and to reduce the possi-
bilities of injury to personnel and/or damage to equipment. If
you do not have personnel who are capable of safe quality
repair of this equipment, we advise you to return the equipment
to DEAN PUMP to be repaired.
When it is necessary to open the pump and/or the pumping
system the fluid will be exposed to the atmosphere and
personnel in the area. For the safety of all involved, the risk of
exposure of personnel to the hazards of the pumpage can be
reduced by flushing the entire system with a compatible, non-
toxic, non-hazardous, stable fluid before opening the pump or
the system. In all cases, where the system is flushed or not, use
the utmost care around the pumpage and the pumping system.
Always wear the appropriate protective apparel when working
on or around the pumping equipment. Safety glasses with side
shields, heavy work gloves (use insulated work gloves when
handling hot items), steel-toed shoes, hard hat, and any other
protective gear as needed for protection. One example of
other gear would be breathing apparatus when working near
toxic materials.
Use only top quality tools.
a) Stop the pump. Turn off the power supply (electricity) to the
pump driver (motor) and lock the switching device so that it
can not be restarted. Tag the switching device so that no
one will attempt to restart the unit.
b) Close the suction and discharge valves completely to isolate
the pump from the system. Lock the valves in the closed posi-
tion and tag them so that no one will attempt to open them.
c) Turn off, lock out, and tag all sub-systems and auxiliary
equipment and auxiliarysupply lines to isolate the pumping
unit from any and all power,energy,and/or fluids.
WARNING:
Do not attempt to perform any work on the unit until you are
confident that the pump and its contents have been stabilized at
ambient temperature, and atmospheric pressure.
Put on protective wear to protect human tissue from attack by the
fluids contained in the pump and any sub-systems, and from any
vapors or fumes that could possibly be released from these flu-
ids. This could mean breathing apparatus, face shields, heavy
long sleeve rubber gloves, rubber apron, hood, and possibly
more, dependent, of course, on the properties of the fluids
involved and the installed drain and vent piping arrangement.
Personal injuryand/or death can occur if adequate precautions
arenot taken with regard to the fluid, the installation and the
possibilities of the release of fluid, vapors, and/or fumes.
d) Remove the coupling guard. Remove the coupling spacer.
Be careful to not bend the blades of the fan (120). If the
pump is a RWA2096, the removal of the spacer will also
loosen the fan (120) from the face of the coupling hub.
e) Drain all the fluids from all the auxiliary sub-systems
(lubrication, cooling, heating, etc.) that are connected to the
pump. Drain each fluid into a separate container.Use
caution required for each fluid after reading the MSDS
(Material Safety Data Sheet) for each.
f) Flush each sub-system with a compatible, non-toxic, non-
hazardous, stable liquid. Drain into individual containers
for each fluid.
g) Carefully bleed off any pressure remaining in the pump.
Pressure remaining in the pump will be dependent upon the
pressure in the system when the pump was stopped; the
quality, type, and condition of the isolation valves; the thermal
expansion values of the fluid and the pump material; and the
change in the vapor pressure of the fluid between the temper-
ature at the time the isolation valves were closed and the
ambient temperature. Bleeding must be through a valved drain
line piped to a closed container mounted lower than the pump.
The container must be arranged with a relief passage to some
point where pressure and fumes will not be harmful to person-
nel. The container must also have a Level device so that
determination can be made that sufficient fluid has been
drained to empty the pump cavity and the volume of fluid that
was contained in the run of suction and discharge pipe
between the isolation valves and the pump. After the initial rush
of fluid from the pump relieves the pressure, the drain valve can
be opened further to speed the draining operation. When fluid
quits running into the drain tank, gauge the volume to see if it
is sufficient to have fully drained the contents of the pump and
the suction and discharge pipes between the isolation valves.
If the system was constructed without any drain connections, it
will be necessary to consult the designers of the system for safe
draining procedures.
h) Now drain any small piping that contains the fluid pumped from
all low points into the same container used to drain the pump.
Do not drain any other fluids (different then the pumpage) into
this container as they may not be compatible. Personal injury,
death, and/or equipment damage could occur.
WARNING:
Even though it might appear that the cavity being drained has com-
pletely drained, be extremely careful about opening the system
and/or opening the pump. If something solid in the pumpage
moves to the vicinity of the drain connection, it could seal-off the
drain and maintain pressure in the cavity thought to have been
drained. It is also possible that the isolation valves arenot sealing
and therefore allowing liquid to flow from the system into the pump.
Personal injury, death and/or equipment damage may occur if
great caution is not exercised.
i) Remove the bolt(s) that retain the bearing housing foot (9) to
the baseplate. because of the above possibility, when you
loosen the gasketed joint at the back of the casing (5), loosen
the casing capscrews (5D) of the RWA2096 or the casing nuts
of the RWA4166 or the RWA4206, only one full turn. Then use
jackscrews (two, 180ºapart) through the flange of the bearing
housing (26) to “break” the gasket seal. The bearing housing
flange of the RWA2096 and RWA4166 pumps have tapped
holes for 1/2” - 13 UNC screws, the RWA4206 has 5/8”-11
UNC. If fluid and/or pressure remains in the pump, it will
spray out now. Use extreme caution, wearing protective gear,
to avoid injury. Do not proceed with disassembly until leakage
ceases completely.If leakage does not cease, the isolation
valves may not be sealing. Note that if the pump was
purchased without a drain, the pump will contain fluid which
will flow out at the time the nuts or capscrews are loosened and
the gasket seal is “broken”.
WARNING:
When you open the pump, the fluid will be exposed to the atmos-
phere and personnel in the area. For the safety of all involved, the
risk of exposure can be reduced by flushing the cavity that was just
drained with a compatible, non-toxic, non-hazardous, stable liquid,
before disassembling the pump.
DISASSEMBLY AND REASSEMBLY PROCEDURES

j) Remove the vapor eliminator assembly (see “Small Piping
Connections” on page 7). First, loosen the tubing nut at the top
of the vapor eliminator and remove the vapor exhaust tube.
Next, remove the vapor eliminator by breaking the pipe joint
at the top connection of the pipe tee. There is no need to break
any of the other piping connections.
k) Remove the casing capscrews (5D) of the RWA2096 or the
casing nuts (5C) of the RWA4166 or the RWA4206, and
using a mechanical lifting apparatus to support the weight, pull
the rotating unit form the casing (5). Unscrew the two
jackscrews until they are not protruding through the “casing
side” of the bearing housing (26) flange.
l) Flush the wetted parts – now exposed – with a compatible,
non-toxic, non-hazardous, stable liquid.
m) Remove the gasket from the face of the casing (5) or the
bearing housing (26) dependent on which one the gasket may
have adhered to. The type of gasket and material of construc-
tion will vary with service requirements. Attack by prying and
then, if necessary, layering off the old 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 and during the scraping
operation to reduce the possibility of fibers becoming
airborne. Wear a respirator during this operation and until all
debris has been disposed of in a plastic bag. Remove all of
the gasket material down to clean metal surfaces on both parts
that contacted the gasket. Use care to not damage the metal
faces. Place all of the gasket residue in a plastic bag, seal the
bag and dispose.
n) Inspect the inside of the casing (5) for any signs of wear,
corrosion or any other damage. If the casing needs to be
removed, remove the bolts from the suction and discharge
flanges. Remove the bolts that hold the casing feet to the base-
plate. The casing can now be removed. Remove the suction
and discharge flange gaskets using the procedure as in
paragraph “m” above.
o) The rotating assembly of the pump can now be moved to a
more convenient location for further disassembly. Use mechan-
ical lifting equipment to move assemblies and components.
DISASSEMBLYPROCEDURE
To further dismantle the pump, perform the following steps in the
sequence shown:
WARNING:
Use only high quality tools.
Obtain MSDS data sheets for all liquids (from the manufacturers of
those liquids) being used with the pump, and heed all cautions.
Flush parts as disassembled to remove hazardous residue from
the pumpage and/or sub-system fluids.
Wear protective equipment as advised at the beginning of this
section.
Use mechanical lifting equipment to lift assemblies and components.
Do not apply heat to parts to assist in disassembly. Explosion
could occur causing personal injury, death, and/or damage to
equipment.
Do not attempt to drill, saw or otherwise cut parts to remove
them. Explosion and/or fuming could occur causing personal
injury, death, and/or equipment damage.
Do not hammer on any parts. Personal injury and/or damage to
equipment may occur.
a) Remove the impeller nuts (12) of the RWA2096 or the impeller
bolt (12) of the RWA4166 or the RWA4206 (all have right
hand threads) while holding the pump shaft (29) against
rotation with a wrench on the flats of the coupling hub. When
loosening the impeller nuts (12) of the RWA2096, be sure to
loosen the outer nut and remove it, before loosening the nut that
is closest to the impeller (3). Remove the impeller retaining
washer (12A). Slide the impeller (3) off of the shaft (29).
Remove the impeller key (4) from the shaft (29).
b) Remove the coupling hub from the pump shaft (29) by
loosening the set screws and using a gear puller to pull the hub
from the shaft. Do not hammer on the coupling hub or the shaft.
Remove the coupling key. Be careful to not bend the blades
of the fan (120).
c) Remove the fan (120) from the pump shaft (29). If the pump is
aRWA2096, slide the fan (120) and the fan clamp ring (122)
off the end of the pump shaft (29). If the pump is a RWA4166
or a RWA4206, loosen the radially positioned securing screw
in the side of the fan collar (121) and slide the fan (120), fan
collar (121), fan clamp ring (122) assembly off the end of the
pump shaft (29). If this assembly resists removal, loosen the two
axially positioned screws that hold these parts together.
WARNING:
Wear gloves when removing the fan (120) to protect your
hands as the fan is made of thin metal and could cut you.
d) Remove the bearing end cover (28) from the bearing housing.
Remove the bearing end cover gasket (77B), if the pump is a
RWA4166 or RWA4206.
e) Press the grease seal (76A) from the bearing end cover (28), if
the pump is a RWA4166 or a RWA4206.
f) Pull the pump shaft (29) from the bearing housing (26), using
care to keep the shaft in line with the bearing housing so as
not to damage any parts. Wear heavy work gloves.
Compression of the mechanical seal springs will be detected
during this operation.
g) Remove the mechanical seal rotary(95B) from the pump
shaft (29).
1) If the pump is a RWA2096, loosen the set screws that hold
the mechanical seal rotary (95B) to the shaft, at least two
full turns each. Use gloves to protect your hands and slide
the mechanical seal rotary (95B) from the shaft (29). It may
take a considerable amount of force to remove the rotary
(95B) as the “O” ring, between the rotary and the shaft
(29) may be tight.
2) If the pump is a RWA4166 or a RWA4206, loosen the set
screws (370), in the shaft sleeve (10), at least two full
revolutions each. Use gloves to protect your hands and slide
the shaft sleeve (10) and the mechanical seal rotary (95B),
as an assembly,from the pump shaft (29). It may take a
considerable amount of force to remove these parts as the
sleeve gasket (77A) is a “O” ring and may be tight on the
shaft (29). Loosen the set screws, that hold the mechanical
seal rotary (95B) to the sleeve (10), at least two full
revolutions each. Slide the seal rotary (95B) from the sleeve
(10). It may take a considerable amount of force to remove
the rotary (95B) as the “O” ring between the rotary and the
sleeve (10) may be tight.
h) Remove the mechanical seal gland (13) from the shaft. Remove
the seal gland gaskets (325) from the seal gland (13). Remove
the mechanical seal stationary(95A) from the mechanical seal
gland (13).
13

If the pump is a RWA4206, remove the “mechanical seal sta-
tionary O ring” from the inside of the mechanical seal gland
(13) and inspect the anti-rotation pin (375). If the pin needs to
be replaced, pull it from the gland with a pair of pliers.
i) Remove the grease seal (76) from the seal gland (13). This can
beremoved by inserting a small drive pin punch into the open
side of the seal and driving it out of the seal gland.
j) If the pump is a RWA2096, remove the snap ring (75A) from
the pump shaft (29). If the pump is a RWA4166 or a
RWA4206, bend the tab of the bearing lock washer (31A) out
of the slot in the bearing lock nut (31). Remove the bearing
lock nut and the bearing lock washer from the pump shaft (29).
Press the thrust bearing(s) (25A) from the pump shaft. Exercise
care to push only on the inner race of the bearings. Do not
press on the shaft snap ring (75) of the RWA4166. Do not
hammer on the bearing(s) or the shaft in any manner as this
may result in damage to the shaft. Remove the snap ring (75)
from the pump shaft of the RWA4166, only if it is damaged.
k) Press or drive the bearing cartridge (180) from the bearing
housing (26).
1) RWA2096 procedure:
Use a 11/4”diameter bar, 12” long, cut square on the
ends. Insert the bar into the coupling end of the bearing
housing (26) until it stops against the bearing cartridge
(180). Use a hydraulic press to press the bearing cartridge
(180) from the bearing housing (26).
2) RWA4166 procedure:
The bearing cartridge (180) has two 3/8”-16 UNC tapped
holes that are acceptable from the impeller end of the
bearing housing. Securely bolt a 1/2”Class 300 flange to
the cartridge, using washers on the bolts. Use a 14” long
piece of 1” pipe (15/16””outside diameter), cut squareon
the ends, to reach down through the bearing housing (26
to press the bearing cartridge out.
3) RWA4206 procedure:
The bearing cartridge (180) has two 1/2”-13 UNC tapped
holes that are accessible from the impeller end of the
bearing housing. Securely bolt a 1” Class 300 flange to
the cartridge, using washers on the bolts. Use a 22” long
piece of 11/4”pipe (15/8”outside diameter), cut square on
the ends, to reach down through the bearing housing (26)
to press the bearing cartridge out.
l) If there is any reason to remove the bearing housing foot (9),
it is secured by two bolts and located by a dowel pin.
REASSEMBLY PROCEDURE
WARNING:
Use only high quality tools.
Wear protective equipment as advised at the beginning of this
section.
Use mechanical lifting equipment to lift assemblies and
components.
Do not hammer on any parts. Personal injury and/or damage to
equipment may occur.
Do not attempt to manufactureparts or modify Dean Pump parts in
any manner. Death, personal injury, and/or damage to
equipment may occur.
Replace all gaskets, seals, bearings, and lubricants. Replace all
parts that have worn, corroded, eroded, or otherwise deteriorated.
Use only Dean Pump Division of Met-Pro Corporation parts.
To reassemble the pump, perform the following steps:
a) Clean all parts, thoroughly inspect them, and replace where
necessary. If the pump shaft (29) has two lip contact wear pat-
terns (lip seal contact area) under the lip seal (76), replace the
shaft. If the shaft is scored under the bearing (180), replace the
shaft.
b) Press a new bearing cartridge (180) into the bearing housing
(26) until it seats firmly against the shoulder in the bearing hous-
ing. On the RWA2096 pump, install with the exposed carbon
bearing face facing outward (see the sectional assembly draw-
ing). On the RWA4166 and RWA4206 pumps, install with the
two tapped holes facing outward and the 1/8”diameter
“through hole” positioned at the top of the bearing housing
(see the sectional assembly drawing). Use a press and a pad
over the end of the bearing cartridge. Do not hammer on the
bearing cartridge; the bearing could be broken. If a press is
not available, the bearing cartridge could be pulled into the
bearing housing by using a piece of threaded rod through the
bearing housing with a large washer and a nut on each end.
c) If the pump is a RWA4166, install the snap ring (75) into
the pump shaft (29), insuring that it is securely into the snap
ring groove.
d) If you are reinstalling a previously used pump shaft (29),
inspect it for wear under the grease seal(s) as directed in para-
graphs g) and p) below. Also remove any scratches or burrs.
Press the thrust bearing(s) (25A) onto the pump shaft (29).
1) RWA2096 procedure:
Press the thrust bearing (25A) onto the pump shaft (29) and
firmly against the shaft shoulder. Do not hammer on the
bearing or shaft in any manner as this will cause damage.
2) RWA4166 procedure:
Press the thrust bearings (25A) onto the pump shaft (29) and
firmly against the snap ring (75). The thrust bearings are
angular-contact type, ground specifically for duplex
mounting and must be assembled back-to-back (see the
illustration below). Note the direction that the races of the
bearing are mounted. Do not hammer on the bearings or
shaft in any manner as this will cause damage.
3) RWA4206 procedure:
Press the thrust bearings (25A) onto the pump shaft (29) and
firmly against the shaft shoulder. The thrust bearings are
angular-contact type, ground specifically for duplex
mounting and must be assembled back-to-back (see the
illustration below). Note the direction that the races of the
bearing aremounted. Do not hammer on the bearings or
shaft in any manner as this will cause damage.
THRUST BEARING POSITION –RWA4166 & RWA4206
14 1

e) Secure the thrust bearing(s) (25A) to the pump shaft (29).
1) RWA2096 procedure:
Install the bearing retaining snap ring (75A) with the tapered
side away from the bearing (see the illustration below).
2) RWA4166 and RWA4206 procedure:
Install a new bearing lock nut washer (31A). Install the
bearing lock nut (31). Bend a tab of the bearing lock nut
washer (31A) into an aligned slot of the bearing lock
nut (31).
f) Thrust bearing lubrication:
1) RWA2096 procedure:
The thrust bearing (25A) of the RWA2096 is already
packed with grease and is sealed for life.
2) RWA4166 and RWA4206 procedure:
Pack the thrust bearings (25A) with grease.
The RWA4166 requires 2.9 cubic inches of grease.
The RWA4206 requires 6.8 cubic inches of grease.
Attempt to force all of the grease into the bearings.
The grease must be a lithium 12-hydroxysterate soap
thickened grease that has rust inhibitors and extreme
pressure additives and must be a NGL1, Grade 2, similar to:
Shell Oil Company’s“Alvania” Grease #EP
or
Union Oil of California’s “UNOBA #2” Grease Grade 2
Grease is also available from Dean Pump in individual
containers. Order “RA3000 Grease #2 for bearing
lubrication”. One container is required for each
RWA4166 pump. Two containers are required for each
RWA4206 pump.
g) Press a new grease seal (76) into the mechanical seal gland
(13). Remove and discard the garder spring from a new
grease seal (76). Install with the lip pointing towards the
impeller end of the pump as shown in the pump sectional
assembly drawing.
Inspect the shaft (29) when installing a used shaft (if the shaft
has been used before): determine if there is one or two grease
seal lip contact wear patterns (grease seal lip contact area).
If two contact areas are present, the pump shaft needs
replacing. If one contact area is present, stop pressing on the
seal when the outside face of the seal is 1/16”above the face
of the mechanical seal gland (13). If the pump shaft (29) is
new,press the seal into the mechanical seal gland (13) until it
is flush with the face of the mechanical seal gland.
If the pump is a RWA4206, and if the anti-rotation pin (375)
was removed, press a new anti-rotation pin into the seal gland
(13). The pin must be installed so that it protrudes from 3/32”to
1/8”from the face of the gland.
h) Install new seal gland gaskets (325) into the mechanical seal
gland (13). Lubricate the gaskets before installing, with a
Rubber Lubricant Emulsion (temporary lubricating agent). One
such product is “P-80”, which is available from International
Products Corp.
i) Install a new mechanical seal stationary seat (95A) into the
mechanical seal gland (13). If the pump is a RWA2096 or a
RWA4166, be sure that there is an “O” ring installed in the
groove in the outside diameter of the mechanical seal stationary
seat (95A). If the pump is a RWA4206, install the stationary
seat “O” ring (the “O” ring is furnished with the mechanical seal
stationary seat) into the groove in the bore of the mechanical
seal gland (13). Install the mechanical seal stationary seat (95A)
with the polished face away from the lip seal (76). Lubricate the
“O” ring before installing the mechanical seal stationary seat
into the groove in the bore of the mechanical seal gland (13).
Install the mechanical seal stationary seat (95A) into the seal
gland (13). Use the same Rubber Lubricant Emulsion used in
h) above.
If the pump is a RWA4206, align the slot in the seal stationary
seat (95A) with the anti-rotation pin (375) in the seal gland (13)
as you are installing the stationary seat.
j) Lubricate the lip of the lip seal (76) and the area of the pump
shaft (29) on which the lip seal will operate. Use the same
grease that was used to pack the bearings (25A). Carefully slide
the mechanical seal gland (13) assembly over the pump shaft,
so as not to damage the lip seal nor the mechanical seal
stationary(95A). Push the mechanical seal gland snugly against
the thrust bearing (25A).
k) If the pump is a RWA2096, go to step l). If the pump is a
RWA4166 or a RWA4206, lubricate the area of the shaft
sleeve (10), onto which the mechanical seal rotary (95B)
mounts, with the same Rubber Lubricant Emulsion used in h)
above. Carefully slide the mechanical seal rotary onto the sleeve
and firmly against the shoulder of the sleeve. Tighten the set
screws of the mechanical seal rotary onto the shaft sleeve.
Lubricate a new shaft sleeve gasket (O ring) (77A) with the same
lubricant, and install it into the sleeve.
l) Clean any grease from the pump shaft (29) that is there from the
seal gland (13) installation of step j).
1) RWA2096 procedure:
Lubricate the inside of the mechanical seal rotary (95B) and
the area of the pump shaft (29) over which the rotary will
slide. Use the same Rubber Lubricant Emulsion as in step
h) above.
Carefully slide the mechanical seal rotary (95B) over the
pump shaft (29) until it contacts the mechanical seal
stationary (95A). Do not damage the seal on any of the
shaft shoulders. Use a 9” to 11” piece of 1” PVC, schedule
40 pipe, with its ends cut square, to push against the seal
rotary (95B). This will allow you to push the rotary (com
pressing the springs of the mechanical seal rotary (95B))
firmly against the shoulder of the pump shaft. Hold the rotary
against the shaft shoulder and tighten the set screws that are
in the mechanical seal rotary (95B) against the pump shaft.
15
SNAP RING ORIENTATION –RWA2096

2) RWA4166 procedure:
Lubricate the inside of the shaft sleeve (10) and the pump
shaft (29), from the impeller (3) fit to the mechanical seal
gland (13). Use the same Rubber Lubricant Emulsion as in
step h) on page 15.
Carefully hold the shaft sleeve (10) centered with the pump
shaft (29), and slide it over the shaft, and into position.
Use an 11” to 13” piece of 11/2” PVC, schedule 40 pipe,
with its ends cut square, to push against the end of the shaft
sleeve. This will allow you to push the sleeve (compressing
the springs of the mechanical seal rotary (95B)) against the
shoulder of the pump shaft. Hold the sleeve tightly against the
shoulder and tighten the four sleeve set screws (370) against
the pump shaft.
3) RWA4206 procedure:
Lubricate the inside of the shaft sleeve (10) and the area of
the pump shaft (29) over which the sleeve will slide. Use the
same Rubber Lubricant Emulsion as in step h) on page 15.
Carefully slide the shaft sleeve (10) over the pump shaft
(29) and into position. Use an 13” to 15” piece of 2” PVC,
schedule 40 pipe, with its ends cut square, to push against
the end of the sleeve. This will allow you to push the sleeve
(compressing the springs of the mechanical seal rotary
(95B)) against the shoulder of the pump shaft. Hold the
sleeve tightly against the shoulder and tighten the four sleeve
set screws (370) against the pump shaft.
m) Use the same Rubber Lubricant Emulsion as used in step h) on
page 15. Lubricate the seal gland gaskets (325) and the bore
in the back of the bearing housing (26), so that the seal gland
gaskets will slide in without damage. Carefully slide the shaft
assembly (29) into the bearing housing (26) from the bearing
end cover end. Do not strike the carbon bearing (180) with the
end of the pump shaft (29). Guide the mechanical seal gland
(13) and the thrust bearings (25A) into the bearing housing
(26) as the shaft assembly (29) is installed.
n) If the pump is a RWA2096, go to step u)
o) Install a new end cover gasket (77B) over the thrust bearing
(25A) and against the bearing housing (26).
p) Remove the garter spring from a new lip seal (76A) and
discard it. Press the lip seal into the bearing end cover (28),
from the bearing side, and up against the shoulder at the
opposite side, when a new shaft is being used. If the pump
shaft is not new, stop pressing on the lip seal 1/16”before it
reaches the shoulder of the end cover,placing the sealing lip
at a new location on the pump shaft (29).
q) Lubricate the pump shaft (29) at the diameter where the lip seal
(76A) contacts. Apply any remaining grease from packing the
thrust bearings (25A) around the exposed face of the bearings
(25A). Place the end cover (28) carefully over the pump shaft
(29) and the thrust bearing (25A), with the plugged hole
towards the baseplate. Bolt the end cover (28) securely to the
bearing housing (26). Torque the end cover bolts to 20 lb. ft.
on the RWA4166 and to 35 lb. ft. on the RWA4206.
r) Mark (pencil or light scribe) a line on the pump shaft (29),
31/4”for the RWA4166 and 51/16”for the RWA4206, from
the coupling end. Place the fan collar (121), grooved face
first, onto the pump shaft and up to the “mark”. Refer to the
drawing above. Tighten the fan collar locking screw tightly.
Place the fan (120), with the concave side of the blades
towards the pump, over the end of the pump shaft (29) and
up against the fan collar (121). The concave side of the fan
blade was indicated with a label “PUMP SIDE” at the time it
was shipped from the factory. Rotate the fan until the holes in
the fan align with the tapped holes in the fan collar.
Place the fan clamp ring (122) over the end of the pump shaft
(29) and up against the fan (120). Align the holes in the fan
clamp ring with the holes in the fan and the holes in the fan
collar (121).
Insert the two socket head bolts, with lock washers, through
the fan clamp ring (122) and the fan (120), into the tapped
holes of the fan collar (121) and tighten them securely.
s) Insertthe coupling bolts through the lockwashers and the
pump coupling hub. Place the hub onto the pump shaft (29),
positioning the outer face of the hub flush with the end of the
pump shaft. Install the coupling key with the end of the key
flush with the end of the pump shaft and the face of the hub.
Tighten the hub set screw(s).
t) Go to step x).
u) Place the end cover (28) carefully over the pump shaft (29) and
bolt it securely into position against the bearing housing (26).
Torque the end cover bolts to 11 lb. ft.
v) Insert the four coupling bolts through the lockwashers and the
fan clamp ring (122) from the side opposite of the raised face.
The clamp ring is made to fit three different sizes of couplings,
so you must insert the bolts into the holes that match the
coupling hub that you are using. Slide the clamp ring onto the
pump shaft (29) with the raised face facing the motor.
Place the fan (120), with the concave side of the blades
towards the pump, over the end of the pump shaft, onto the
coupling bolts and up against the clamp ring. Refer to the
drawing on page 17. The concave side of the fan blade was
indicated with a label “PUMP SIDE” at the time it was shipped
from the factory.
RWA4166 & RWA4206 FANLOCATIONS
16

RWA2096 FANMOUNTING
w) Place the coupling hub over the end of the pump shaft (29) and
onto the coupling bolts, until the face of the hub is flush with the
end of the pump shaft. Install the coupling key, with the end of
the key flush with the end of the pump shaft and the face of the
hub. Tighten the hub set screw(s).
x) Place the impeller key (4) into the keyway of the pump shaft (29).
Carefully slide the impeller (3) onto the pump shaft (29).
1) If the pump is a RWA2096:
Slide the impeller washer (12A) over the pump shaft (29)
and against the impeller (3). Thread one of the impeller nuts
(12) onto the pump shaft (29) and tighten it to a torque of
40 lb. ft. Thread the second impeller nut (12) onto the end
of the pump shaft and tighten it to a torque of 40 lb. ft. Hold
the pump shaft against the tightening torque, by placing a
wrench on the flats of the coupling hub. Be careful not to
bend the blades of the fan (120).
2) If the pump is a RWA4166 or a RWA4206:
Place the impeller washer (12A) on to the impeller bolt (12)
and thread the impeller bolt (12) into the end of the pump
shaft (29). Tighten the impeller bolt to a torque of 60 lb. ft.
for the RWA4166 and 100 lb. ft. for the RWA4206. Hold
the pump shaft against the tightening torque by placing a
wrench on the flats of the coupling hub. Be careful to not
bend the blades of the fan (120).
y) If the pump has a casing ring (6A), press it into the casing (5).
z) Carefully insert the bearing housing (26) assembly into the
casing with a new casing gasket (77). Assure that the bearing
housing (26) assembly is fully into the casing (5) and that the
bearing housing foot (9) is in full contact with the baseplate.
Tighten the casing cap screws (5D) or the casing stud nuts (5C)
slowly and evenly so that the casing gasket will compress
evenly. Torque the casing cap screws (5D) of the RWA2096
pumps to 50 lb. ft. Torque the casing stud nuts (5C) of the
RWA4166 and RWA4206 pumps to 105 lb. ft. if the studs are
3/4”and to 165 lb. ft. if the studs are7/8”.
aa) Rotate the pump shaft (29) by hand to check for interference.
Wear heavy gloves when rotating the shaft, to protect your
hands. Correct if any rubbing is detected.
ab) If the casing (5) was removed from the baseplate, reattach it with
bolts through the casing feet to the baseplate. Reattach the
suction and discharge flanges, installing new gaskets.
ac) Bolt the bearing housing foot to the baseplate. Rotate the pump
shaft (29) again by hand to check for rubbing. Wear heavy
gloves when rotating the shaft to protect your hands. Correct if
any rubbing is detected.
ad) Realign the pump and driver per instructions under
“PUMP AND DRIVER ALIGNMENT”
ae) Follow the instructions under “PUMP LUBRICATION”,
“STARTING THE PUMP”, AND “PUMP START UP
CHECKLIST”.
af) Replace the vapor eliminator into the top of the pipe tee
after filling the pump and venting the seal chamber.
Reinstall the vapor exhaust tube.
17

Dean Pump Serial Number
Plant Property Number
Service
Location
Capacity ; T.D.H. ; Imp. Dia. ; Temp. ; RPM
Spare Parts in Plant Stock Room
Interchangeable with Dean Serial Numbers
CUSTOMER’SPLANT MAINTENANCE RECORD
18