ITT Goulds Pumps 3405 Manual

Installation, Operation and
Maintenance Instructions
3405-3406-3416

Table of Contents
1 Safety..................................................................................................................................................................4
1.1 Important Safety Notice............................................................................................................................. 4
1.2 Safety warnings......................................................................................................................................... 4
1.3 Safety ........................................................................................................................................................5
1.4 General precautions .................................................................................................................................. 6
1.5 ATEX Considerations and Intended use ...................................................................................................8
1.6 Parts .......................................................................................................................................................... 9
2 Installation........................................................................................................................................................10
2.1 Location................................................................................................................................................... 10
2.2 Prepare the foundation............................................................................................................................ 10
2.3 Initial alignment ....................................................................................................................................... 11
2.4 Piping - general .......................................................................................................................................13
2.5 Install suction piping ................................................................................................................................ 14
2.6 Piping - discharge.................................................................................................................................... 18
2.7 Connection of piping................................................................................................................................ 18
2.8 Check rotation .........................................................................................................................................18
2.9 Connection of coupling............................................................................................................................ 18
2.10 Connection of bearing cooling water piping ..........................................................................................19
2.11 Connection of drain piping.....................................................................................................................19
3 Preparation for operation ...............................................................................................................................20
3.1 Pump bearings ........................................................................................................................................20
3.2 Driver bearings and coupling................................................................................................................... 21
3.3 Stuffing boxes.......................................................................................................................................... 21
3.4 Connection of water seal piping ..............................................................................................................23
3.5 Connection of piping to quenching gland ................................................................................................23
3.6 Connection of bearing cooling water piping ............................................................................................ 26
3.7 Connection of drain piping....................................................................................................................... 26
4 Starting pump ..................................................................................................................................................27
4.1 Priming ....................................................................................................................................................27
4.2 Regulation of cooling water flow.............................................................................................................. 30
4.3
Adjustment of stuffing box gland ............................................................................................................. 31
4.4 Alignment - final....................................................................................................................................... 31
4.5 Doweling.................................................................................................................................................. 31
5 Operation..........................................................................................................................................................32
5.1 Stuffing box .............................................................................................................................................32
5.2 Operating at reduced capacities.............................................................................................................. 32
5.3 Operating at reduced head...................................................................................................................... 33
5.4 Operating with surge conditions in line.................................................................................................... 33
5.5 Operating under freezing conditions ....................................................................................................... 33
6 Trouble check list ............................................................................................................................................34
6.1 No water delivered .................................................................................................................................. 34
6.2 Not enough water delivered .................................................................................................................... 34
Table of Contents
3405-3406-3416 Installation, Operation and Maintenance Instructions 1

6.3
Not enough pressure...............................................................................................................................34
6.4 Pump works awhile and then quits.......................................................................................................... 35
6.5 Pump takes too much power................................................................................................................... 35
6.6 Pump leaks excessively at stuffing box................................................................................................... 35
6.7 Pump is noisy .......................................................................................................................................... 35
7 Care and maintenance ....................................................................................................................................37
7.1 Lubrication - bearings.............................................................................................................................. 37
7.2 Repacking stuffing boxes ........................................................................................................................37
7.3 Sectional view ......................................................................................................................................... 39
7.4 Dismantling of pump................................................................................................................................ 45
7.5 Reassembly of pump............................................................................................................................... 46
7.6 Changing rotation of pump in field........................................................................................................... 54
7.7 Overhaul of pump.................................................................................................................................... 54
7.8 Emergency ball bearing replacement...................................................................................................... 55
7.9 Spare parts.............................................................................................................................................. 56
7.10 Instructions for ordering spare parts...................................................................................................... 57
Table of Contents
2 3405-3406-3416 Installation, Operation and Maintenance Instructions

Foreword
The design, material and workmanship incorporated in the construction of Goulds Model 3405, 3406 and
3416 Double Suction Centrifugal Pumps makes them capable of giving long, trouble-free service. The life
and satisfactory service of any mechanical unit, however, is enhanced and extended by correct applica-
tion, proper installation, periodic inspection and maintenance. This instruction book was prepared so op-
erators will understand the construction and the correct methods for installing, operating and maintaining
these pumps.
Read thoroughly Sections 2 Installation on page 10, 3 Preparation for operation on page 20, 4 Starting
pump on page 27 and 5 Operation on page 32 and be sure to follow the instructions for installation
and operation. Sections 6 Trouble check list on page 34 and 7 Care and maintenance on page 37 are
answers to trouble and maintenance questions. Keep this instruction book handy for reference. Kindly
direct any questions or suggestions to the attention of the Engineering Application Div., Goulds Pumps,
Inc., Seneca Falls, New York.
Remember, the experience and recommendation of a Goulds representative are always available on any
pump application problem.
Table of Contents
3405-3406-3416 Installation, Operation and Maintenance Instructions 3

1 Safety
1.1 Important Safety Notice
To: Our Valued Customers:
User safety is a major focus in the design of our products. Following the precautions outlined in this man-
ual will minimize your risk of injury.
ITT Goulds pumps will provide safe, trouble-free service when properly installed, maintained, and operat-
ed.
Safe installation, operation, and maintenance of ITT Goulds Pumps equipment are an essential end user
responsibility. This Pump Safety Manual identifies specific safety risks that must be considered at all
times during product life. Understanding and adhering to these safety warnings is mandatory to ensure
personnel, property, and/or the environment will not be harmed. Adherence to these warnings alone,
however, is not sufficient — it is anticipated that the end user will also comply with industry and corporate
safety standards. Identifying and eliminating unsafe installation, operating and maintenance practices is
the responsibility of all individuals involved in the installation, operation, and maintenance of industrial
equipment.
Please take the time to review and understand the safe installation, operation, and maintenance guide-
lines outlined in this Pump Safety Manual and the Instruction, Operation, and Maintenance (IOM) man-
ual. Current manuals are available at https://www.gouldspumps.com/en-US/Tools-and-Resources/Litera-
ture/ or by contacting your nearest Goulds Pumps sales representative.
These manuals must be read and understood before installation and start-up.
For additional information, contact your nearest Goulds Pumps sales representative or visit our Web site
at https://www.gouldspumps.com
1.2 Safety warnings
Specific to pumping equipment, significant risks bear reinforcement above and beyond normal safety
precautions.
WARNING:
A pump is a pressure vessel with rotating parts that can be hazardous. Any pressure vessel
can explode, rupture, or discharge its contents if sufficiently over pressurized causing death,
personal injury, property damage, and/or damage to the environment. All necessary measures
must be taken to ensure over pressurization does not occur.
WARNING:
Operation of any pumping system with a blocked suction and discharge must be avoided in all
cases. Operation, even for a brief period under these conditions, can cause superheating of
enclosed pumpage and result in a violent explosion. All necessary measures must be taken by
the end user to ensure this condition is avoided.
WARNING:
The pump may handle hazardous and/or toxic fluids. Care must be taken to identify the con-
tents of the pump and eliminate the possibility of exposure, particularly if hazardous and/or tox-
ic. Potential hazards include, but are not limited to, high temperature, flammable, acidic, caus-
tic, explosive, and other risks.
1 Safety
4 3405-3406-3416 Installation, Operation and Maintenance Instructions

WARNING:
Pumping equipment Instruction, Operation, and Maintenance manuals clearly identify accepted
methods for disassembling pumping units. These methods must be adhered to. Specifically,
applying heat to impellers and/or impeller retaining devices to aid in their removal is strictly for-
bidden. Trapped liquid can rapidly expand and result in a violent explosion and injury.
ITT Goulds Pumps will not accept responsibility for physical injury, damage, or delays caused by a failure
to observe the instructions for installation, operation, and maintenance contained in this Pump Safety
Manual or the current IOM available at www.gouldspumps.com/literature.
1.3 Safety
Definitions
Throughout this manual the words WARNING, CAUTION, ELECTRICAL, and ATEX are used to indicate
where special operator attention is required.
Observe all Cautions and Warnings highlighted in this Pump Safety Manual and the IOM provided with
your equipment.
WARNING:
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
Example: Pump shall never be operated without coupling guard installed correctly.
CAUTION:
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
Example: Throttling flow from the suction side may cause cavitation and pump damage.
ELECTRICAL HAZZARD:
WARNING:
Indicates the possibility of electrical risks if directions are not followed.
Example: Lock out driver power to prevent electric shock, accidental start-up, and physical in-
jury.
ATEX:
WARNING:
When installed in potentially explosive atmospheres, the instructions that follow the Ex symbol
must be followed. Personal injury and/or equipment damage may occur if these instructions are
not followed. If there is any question regarding these requirements or if the equipment is to be
modified, please contact an ITT Goulds Pumps representative before proceeding.
Example: Improper impeller adjustment could cause contact between the rotating and station-
ary parts, resulting in a spark and heat generation.
1.3 Safety
3405-3406-3416 Installation, Operation and Maintenance Instructions 5

1.4 General precautions
WARNING:
A pump is a pressure vessel with rotating parts that can be hazardous. Hazardous fluids may
be contained by the pump including high temperature, flammable, acidic, caustic, explosive,
and other risks. Operators and maintenance personnel must realize this and follow safety
measures. Personal injuries will result if procedures outlined in this manual are not followed.
ITT Goulds Pumps will not accept responsibility for physical injury, damage or delays caused
by a failure to observe the instructions in this manual and the IOM provided with your equip-
ment.
Table 1: General Precautions
WARNING NEVER APPLY HEAT TO REMOVE IMPELLER. It may explode due to trapped liquid.
WARNING NEVER use heat to disassemble pump due to risk of explosion from tapped liquid.
WARNING NEVER operate pump without coupling guard correctly installed.
WARNING NEVER run pump below recommended minimum flow when dry, or without prime.
WARNING ALWAYS lock out power to the driver before performing pump maintenance.
WARNING NEVER operate pump without safety devices installed.
WARNING NEVER operate pump with discharge valve closed.
WARNING NEVER operate pump with suction valve closed.
WARNING DO NOT change service application without approval of an authorized ITT Goulds
Pumps representative.
WARNING Safety Apparel:
•Insulated work gloves when handling hot bearings or using bearing heater
• Heavy work gloves when handling parts with sharp edges, especially impellers
• Safety glasses (with side shields) for eye protection
• Steel-toed shoes for foot protection when handling parts, heavy tools, etc.
• Other personal protective equipment to protect against hazardous/toxic fluids
WARNING Receiving:
Assembled pumping units and their components are heavy. Failure to properly lift and
support equipment can result in serious physical injury and/or equipment damage. Lift
equipment only at specifically identified lifting points or as instructed in the current IOM.
Current manuals are available at www.gouldspumps.com/literature_ioms.html or from
your local ITT Goulds Pumps sales representative. Note: Lifting devices (eyebolts,
slings, spreaders, etc.) must be rated, selected, and used for the entire load being lifted.
1.4 General precautions
6 3405-3406-3416 Installation, Operation and Maintenance Instructions

WARNING Alignment:
Shaft alignment procedures must be followed to prevent catastrophic failure of drive
components or unintended contact of rotating parts. Follow coupling manufacturer's
coupling installation and operation procedures.
WARNING Before beginning any alignment procedure, make sure driver power is locked out. Fail-
ure to lock out driver power will result in serious physical injury.
CAUTION Piping:
Never draw piping into place by forcing at the flanged connections of the pump. This
may impose dangerous strains on the unit and cause misalignment between pump and
driver. Pipe strain will adversely effect the operation of the pump resulting in physical in-
jury and damage to the equipment.
WARNING Flanged Connections:
Use only fasteners of the proper size and material.
WARNING Replace all corroded fasteners.
WARNING Ensure all fasteners are properly tightened and there are no missing fasteners.
WARNING Startup and Operation:
When installing in a potentially explosive environment, please ensure that the motor is
properly certified.
WARNING Operating pump in reverse rotation may result in contact of metal parts, heat generation,
and breach of containment.
WARNING Lock out driver power to prevent accidental start-up and physical injury.
WARNING The impeller clearance setting procedure must be followed. Improperly setting the clear-
ance or not following any of the proper procedures can result in sparks, unexpected
heat generation and equipment damage.
WARNING If using a cartridge mechanical seal, the centering clips must be installed and set screws
loosened prior to setting impeller clearance. Failure to do so could result in sparks, heat
generation, and mechanical seal damage.
WARNING The coupling used in an ATEX classified environment must be properly certified and
must be constructed from a non-sparking material.
WARNING Never operate a pump without coupling guard properly installed. Personal injury will oc-
cur if pump is run without coupling guard.
WARNING Make sure to properly lubricate the bearings. Failure to do so may result in excess heat
generation, sparks, and / or premature failure.
CAUTION The mechanical seal used in an ATEX classified environment must be properly certified.
Prior to start up, ensure all points of potential leakage of process fluid to the work envi-
ronment are closed.
1.4 General precautions
3405-3406-3416 Installation, Operation and Maintenance Instructions 7

CAUTION Never operate the pump without liquid supplied to mechanical seal. Running a mechani-
cal seal dry, even for a few seconds, can cause seal damage and must be avoided.
Physical injury can occur if mechanical seal fails.
WARNING Never attempt to replace packing until the driver is properly locked out and the coupling
spacer is removed.
WARNING Dynamic seals are not allowed in an ATEX classified environment.
WARNING DO NOT operate pump below minimum rated flows or with suction and/or discharge
valve closed. These conditions may create an explosive hazard due to vaporization of
pumpage and can quickly lead to pump failure and physical injury
WARNING Ensure pump is isolated from system and pressure is relieved before disassembling
pump, removing plugs, opening vent or drain valves, or disconnecting piping.
WARNING Shutdown, Disassembly, and Reassembly:
Pump components can be heavy. Proper methods of lifting must be employed to avoid
physical injury and/or equipment damage. Steel toed shoes must be worn at all times.
WARNING The pump may handle hazardous and/or toxic fluids. Observe proper decontamination
procedures. Proper personal protective equipment should be worn. Precautions must be
taken to prevent physical injury. Pumpage must be handled and disposed of in conform-
ance with applicable environmental regulations.
WARNING Operator must be aware of pumpage and safety precautions to prevent physical injury.
WARNING Lock out driver power to prevent accidental startup and physical injury.
CAUTION Allow all system and pump components to cool before handling them to prevent physi-
cal injury.
CAUTION If pump is a Model NM3171, NM3196, 3198, 3298, V3298, SP3298, 4150, 4550, or
3107, there may be a risk of static electric discharge from plastic parts that are not prop-
erly grounded. If pumped fluid is non-conductive, pump should be drained and flushed
with a conductive fluid under conditions that will not allow for a spark to be released to
the atmosphere.
WARNING Never apply heat to remove an impeller. The use of heat may cause an explosion due to
trapped fluid, resulting in severe physical injury and property damage.
CAUTION Wear heavy work gloves when handling impellers as sharp edges may cause physical
injury.
CAUTION Wear insulated gloves when using a bearing heater. Bearings will get hot and can cause
physical injury.
1.5 ATEX Considerations and Intended use
Special care must be taken in potentially explosive environments to ensure that the equipment is proper-
ly maintained. This includes but is not limited to:
1. Monitoring the pump frame and liquid end temperature.
2. Maintaining proper bearing lubrication.
3. Ensuring that the pump is operated in the intended hydraulic range.
The ATEX conformance is only applicable when the pump unit is operated within its intended use. Oper-
ating, installing or maintaining the pump unit in any way that is not covered in the Instruction, Operation,
and Maintenance manual (IOM) can cause serious personal injury or damage to the equipment. This
1.5 ATEX Considerations and Intended use
8 3405-3406-3416 Installation, Operation and Maintenance Instructions

includes any modification to the equipment or use of parts not provided by ITT Goulds Pumps. If there is
any question regarding the intended use of the equipment, please contact an ITT Goulds representative
before proceeding.
Current IOMs are available at www.gouldspumps.com/en-US/Tools-and-Resources/Literature/IOMs/ or
from your local ITT Goulds Pumps Sales representative.
All pumping unit (pump, seal, coupling, motor and pump accessories) certified for use in an ATEX classi-
fied environment, are identified by an ATEX tag secured to the pump or the baseplate on which it is
mounted. A typical tag would look like this:
The CE and the Ex designate the ATEX compliance. The code below reads as follows:
II = Group 2
2 = Category 2
G/D = Gas and Dust present
T4 = Temperature class, can be T1 to T6 (see following table)
Table 2: Temperature class definitions
Code Maximum permissible surface temperature in °C |
°F
Minimum permissible surface temperature in °C | °F
T1 450 | 842 372 | 700
T2 300 | 572 277 | 530
T3 200 | 392 177 | 350
T4 135 | 275 113 | 235
T5 100 | 212 Option not available
T6 85 | 185 Option not available
The code classification marked on the equipment must be in accordance with the specified area where
the equipment will be installed. If it is not, do not operate the equipment and contact your ITT Goulds
Pumps sales representative before proceeding.
1.6 Parts
The use of genuine Goulds parts will provide the safest and most
reliable operation of your pump. ITT Goulds Pumps ISO certifica-
tion and quality control procedures ensure the parts are manufac-
tured to the highest quality and safety levels.
Please contact your local Goulds representative for details on
genuine Goulds parts.
1.6 Parts
3405-3406-3416 Installation, Operation and Maintenance Instructions 9

2 Installation
2.1 Location
Pumping unit should be placed as close as practical to the source of supply. Always allow sufficient head
room to remove the upper half casing of the pump and the rotating element. Floor space allotted to the
pumping unit should be sufficient for inspection and maintenance.
2.2 Prepare the foundation
1. The foundation should be substantial in order to absorb any vibration and to form a permanent rigid
support for the bedplate. A concrete foundation poured on a solid footing, using a one-three-five
mix, of a liberal thickness to support the pumping unit is satisfactory.
2. Foundation Bolts:
a) The location and size of the foundation bolts is shown on the outline assembly drawing sup-
plied for the pumping unit.
b) Each bolt should be installed with a pipe sleeve around it - to allow for adjustment. The inside
sleeve diameter should be 2½ to 3 times the diameter of the bolt. Place a washer between bolt
head and sleeve to hold bolt in position. Stuff waste around foundation bolts to prevent con-
crete from entering between the bolt and pipe sleeve. See Figure 1: on page 10.
c) The foundation bolts should be of sufficient length so that they project through the nut approxi-
mately ¼" after allowance has been made for grouting (¾" to 1½"), the thickness of the bed-
plate, and the thickness of the foundation bolt nut. See Figure 1: on page 10.
Figure 1:
3. Preparing Foundation for Mounting:
Prior to setting unit upon the foundation, clean the top surface of concrete.
a) Put the pumping unit in place on the wedges. The wedges should be placed at four points, two
below the approximate center of the pump and two below the approximate center of the driver
(See Figure 2: on page 11). Some installations may require additional wedges near the mid-
dle of the bedplate.
b) Be sure that coupling is disconnected between pump and driver.
c) By adjustment of the wedges, bring the unit to an approximate level and provide for the proper
distance above the foundation for grouting (¾" to 1½"). Plumb the suction and discharge flang-
es. By further adjustment of the wedges, bring the coupling halves into reasonable alignment.
Check by method described in Section Alignment - initial, steps 4 through 6.
4. After the wedges have been adjusted, tighten foundation bolts evenly but only finger tight.
2 Installation
10 3405-3406-3416 Installation, Operation and Maintenance Instructions

NOTICE:
Final tightening of foundation bolts is done after grout has set 48 hours.
Figure 2:
5. Mounting Unit on Foundation:
a) Build wood dam around foundation as shown in Figure 1: on page 10. Wet top surface of con-
crete foundation thoroughly.
b) Pour grout in hole provided in the top of the bedplate. Use of a non-shrink grout is recommend-
ed. The grout should be thin enough to flow out under the bedplate. A mixture of one part Port-
land cement to three parts sharp sand may also be used. Cement grout should not be so thin
that the cement will separate from the sand.
c) The grout should be puddled continuously as it is poured to expel the air and completely fill the
space under the bedplate, to the level of the grout hole in the top of the bedplate.
d) With a trowel, strike along the top of the wood dam to give a neat, finished appearance at this
point.
e) Allow grout to harden at least 48 hours.
2.3 Initial alignment
Alignment of the pump and driver through the flexible coupling is of extreme importance for trouble-free
mechanical operation.
If the driver was mounted at the factory, the unit was in alignment before it left our assembly department.
However, in transit and subsequent handling, this factory alignment was probably destroyed; and, it is
now necessary to reestablish the alignment. As directed in Operating at reduced head only approximate
alignment was obtained by wedging under bedplate before grouting.
2.3 Initial alignment
3405-3406-3416 Installation, Operation and Maintenance Instructions 11

The following are suggested steps to establish the initial alignment of the pumping unit.
NOTICE:
This is an initial alignment. The final alignment is done after the unit has been run under actual
operating conditions. The final alignment procedure is outlined in Section Alignment - final and
must be followed.
1. Be sure coupling halves are disconnected.
2. Tighten foundation bolts.
3. Tighten pump and driver hold-down bolts.
4. Any coupling manufacturer's instruction sheets sent with the pump should be studied and used
when installing, aligning, or servicing coupling. Align coupling, following manufacturer's instructions.
If instructions are not available, the following procedure (Steps 5 and 6) may be used.
5. Check angular misalignment - shaft axes concentric but not parallel - by inserting a taper gauge or
feeler at four points on the circumference of coupling halves at 90° intervals. See Figure 3: on page
12. The unit will be in angular alignment when the measurements show the coupling faces are the
same distance apart at all points. The "gap" between the coupling halves should be checked at this
time. This depends on the type of coupling used and this information will be found in the instructions
for the specific make of coupling furnished. It is normally 1/8-1/4" for most applications. Adjust an-
gular alignment and "gap" by loosening the driver hold-down bolts and shifting or shimming driver
as required. Tighten driver hold-down bolts after angular alignment and correct "gap" are secured.
Figure 3:
NOTICE:
Pumps and drivers are bedplated so that when coupling faces are positioned in accordance
with the manufacturer's recommended gap, there is an overhang of approximately 1/8" from
shaft ends to coupling hub faces.
2.3 Initial alignment
12 3405-3406-3416 Installation, Operation and Maintenance Instructions

6. Check parallel misalignment - shaft axes parallel but not concentric-by laying straight edge across
both coupling rims at top, bottom and both sides. See Figure 4: on page 13.
Figure 4:
The unit will be in horizontal parallel alignment when the straight edge rests evenly on both halves
of the coupling at each side.
In order to secure vertical parallel alignment under actual operating conditions, the driver shaft must
be set 0.002-0.004"higher or lower than the pump shaft to compensate for vertical expansion.
Thin shim stock should be used under the driver feet to establish parallel alignment. (In some in-
stances, shims may be required under the pump feet.)
A suggested approximate cold setting for motor driven pumps is outlined below:
a) When pumping cold liquids, set the motor shaft .006" below the pump shaft.
b) When pumping hot liquids (200°F and over) set the motor and pump shafts at the same height.
Thin shim stock should be used under the driver feet to establish parallel alignment. (In some in-
stances, shims may be required under the pump feet).
7. Bear in mind always that alignment in one direction may alter the alignment in another. Check
through each alignment procedure after making any alignment alteration.
2.4 Piping - general
1. All piping must be supported independently of the pump. The piping should always "lineup" natu-
rally with the pump flanges. Never draw the piping into place by use of force at the flanged suc-
tion and discharge connections of the pump.
2. The piping, both suction and discharge, should be as short and direct as possible. Avoid all un-
necessary elbows, bends and fittings, as they increase the friction losses in the piping. The size
of pipe and fittings should be carefully selected and of sufficient size to keep the friction losses as
low as practical.
2.4 Piping - general
3405-3406-3416 Installation, Operation and Maintenance Instructions 13

3. Piping must not be connected to the pump until the grout has thoroughly hardened and the foun-
dation bolts as well as driver and pump hold-down bolts have been tightened. See Section
2.7 Connection of piping on page 18.
4. When handling liquids at elevated temperatures, arrangements must be made for expansion
loops or expansion joints so that the linear expansion of the pipe will not cause the pumping unit
to be drawn out of alignment.
2.5 Install suction piping
1. General - properly installed suction piping is of extreme importance for trouble-free centrifugal pump
operation.
a) The suction pipe should be as large or larger than the pump suction.
b) lncreasers, if used, should be eccentric and preferably at the pump suction flange, sloping side
down.
c) A centrifugal pump should never be throttled on the suction side for capacity adjustment.
d) When more than one pump is operating from the same source of supply, separate suction
lines, if possible, should be used. If not possible for separate lines, piping arrangement as
shown in Figure 7: on page 18 is recommended.
2.5 Install suction piping
14 3405-3406-3416 Installation, Operation and Maintenance Instructions

Figure 5:
2. Installations With Pump Above Source of Supply - Suction Lift:
a) Keep suction pipe free from air pockets. See Figure 5: on page 15.
• Piping should slope upwards from source of supply.
• No portion of piping should extend above
the pump suction nozzle.
b) All joints must be air tight.
c) The suction pipe should always be submerged into the source of supply as shown in Figure 6:
on page 17.
2.5 Install suction piping
3405-3406-3416 Installation, Operation and Maintenance Instructions 15

d) A foot valve should only be used if necessary for priming, or, if the pump is to be used on inter-
mittent service and is required to hold its prime.
e) Suction strainers when used should have a net free area of at least three times the suction pipe
area.
3. Installations With Pump Below Source of Supply - Suction Head or Flooded Suction:
a) A gate valve should be installed in the suction line to permit closing the line for pump inspection
and maintenance.
b) Keep suction pipe free from air pockets.
• Piping should be level or slope gradually downward from the source of supply.
• No portion of the piping should extend below the pump suction flange.
c) The size of entrance from the supply should be no smaller than the suction pipe.
d) The suction pipe should be below the liquid surface at the source of supply as shown in Figure
6: on page 17.
2.5 Install suction piping
16 3405-3406-3416 Installation, Operation and Maintenance Instructions

Figure 6:
2.5 Install suction piping
3405-3406-3416 Installation, Operation and Maintenance Instructions 17

Figure 7:
2.6 Piping - discharge
1. A gate valve and a check valve should be installed in the discharge line. The check valve should
be located between the gate valve and pump to permit inspection of the check valve. The gate
valve is required for priming, regulation of flow capacity and for inspection and maintenance of
the pump. See Figure 5: on page 15.
2. lncreasers, if used in discharge line, should be placed between the check valve and the pump.
2.7 Connection of piping
Connect suction and discharge piping. Rotate the pump shaft by hand several complete revolutions to be
sure that there is no binding and that all parts are free. Recheck alignment as described in Section Align-
ment - initial. If the connection of the piping causes unit to be out of alignment, correct piping to relieve
strain on the pump.
2.8 Check rotation
The direction of rotation is marked on the pump casing. Make sure that driver rotates in the same direc-
tion. On electric motors, jog starting switch to be sure wiring is connected for correct rotation. Be sure
that coupling is disconnected.
2.9 Connection of coupling
Connect coupling, following instructions for the particular make of coupling furnished. This data is sup-
plied separately, giving complete instructions for connection, lubrication, alignment and maintenance.
NOTICE:
Pumps and drivers are bedplated so that when coupling faces are positioned in accordance
with the manufacturer's recommended gap, there is an overhang of approximately 1/8" from
shaft ends to coupling hub faces.
1. Model 3405 - between 180ºF and 250ºF when bearing housings are not cooled and between
250º and 350ºF, in addition to bearing housing cooling.
2.6 Piping - discharge
18 3405-3406-3416 Installation, Operation and Maintenance Instructions