ITT Goulds Pumps 3500 Manual

Installation, Operation and
Maintenance Instructions
Model 3500 Medium Consistency Pump System

Table of Contents
1 Safety..................................................................................................................................................................3
1.1 Important Safety Notice............................................................................................................................. 3
1.2 Safety Warnings ........................................................................................................................................3
1.3 Safety ........................................................................................................................................................ 4
1.4 General precautions .................................................................................................................................. 5
1.5 .................................................................................................................................................................8
1.6 Parts .......................................................................................................................................................... 9
2 Pump Description............................................................................................................................................10
2.1 Introduction.............................................................................................................................................. 10
2.2 Design concept........................................................................................................................................ 10
2.3 Construction details................................................................................................................................. 11
3 Installation........................................................................................................................................................13
3.1 Site / foundation ......................................................................................................................................13
3.2 Level baseplate ....................................................................................................................................... 14
3.3 Alignment and alignment procedure........................................................................................................ 15
3.3.1
Alignment checks.............................................................................................................................15
3.3.2 Alignment criteria ..........................................................................................................................15
3.4 Set up ...................................................................................................................................................... 16
3.5 Measurement ..........................................................................................................................................16
3.5.1 Angular alignment .........................................................................................................................16
3.5.2
Parallel alignment ............................................................................................................................17
3.5.3 Complete alignment ......................................................................................................................19
3.6 Grout baseplate....................................................................................................................................... 19
3.6.1 Alignment check............................................................................................................................20
3.7 PIPING .................................................................................................................................................... 20
3.7.1 General ......................................................................................................................................... 20
4 Preparation for Startup ...................................................................................................................................21
4.1 Check rotation ......................................................................................................................................... 21
4.1.1 Check impeller axial clearance ..................................................................................................... 21
4.2 Couple pump and driver .......................................................................................................................... 21
4.2.1 Lubricating bearings......................................................................................................................21
4.2.2 Shaft sealing ................................................................................................................................. 21
5 Operation and Controls ..................................................................................................................................22
5.1 Air removal system (Refer to Figure 14) .................................................................................................22
5.2 Level control - typical .............................................................................................................................. 22
5.3 Dilution system – typical ......................................................................................................................... 23
5.4 Seal/vacuum flush ................................................................................................................................... 24
5.5 Standpipe steam heating......................................................................................................................... 25
5.6 Pumping water or low consistency stock................................................................................................. 25
5.7 Pumping with stock - start up procedure ................................................................................................. 25
5.8 Shutdown procedure ............................................................................................................................... 26
5.9 Operation without a vacuum pump.......................................................................................................... 26
5.10 Monitoring during operation................................................................................................................... 26
Table of Contents
Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions 1

6 Maintenance.....................................................................................................................................................29
6.1 Lubrication............................................................................................................................................... 29
6.2 Impeller clearance adjustment ................................................................................................................29
6.3 Disassembly ............................................................................................................................................ 30
6.4 Inspection and overhaul .......................................................................................................................... 34
6.5 Reassembly of pump............................................................................................................................... 35
6.6 How to order............................................................................................................................................ 38
6.7 Emergency service.................................................................................................................................. 38
Table of Contents
2 Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions

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
Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions 3

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 http://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 the 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 Hazard:
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
4 Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions

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 trap-
ped 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
1.4 General precautions
Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions 5

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.
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. Failure 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 misalign-
ment between pump and driver. Pipe strain will adversely effect the operation
of the pump resulting in physical injury 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 fasten-
ers.
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 clearance 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 certi-
fied and must be constructed from a non-sparking material.
WARNING Never operate a pump without coupling guard properly installed. Personal in-
jury will occur if pump is run without coupling guard.
1.4 General precautions
6 Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions

WARNING Make sure to properly lubricate the bearings. Failure to do so may result in ex-
cess heat generation, sparks, and / or premature failure.
CAUTION The mechanical seal used in an ATEX classified environment must be proper-
ly certified. Prior to start up, ensure all points of potential leakage of process
fluid to the work environment are closed.
CAUTION Never operate the pump without liquid supplied to mechanical seal. Running a
mechanical 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 dis-
charge valve closed. These conditions may create an explosive hazard due to
vaporization of pumpage and can quickly lead to pump failure and physical in-
jury.
WARNING Ensure pump is isolated from system and pressure is relieved before disas-
sembling pump, removing plugs, opening vent or drain valves, or disconnect-
ing 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 decon-
tamination procedures. Proper personal protective equipment should be worn.
Precautions must be taken to prevent physical injury. Pumpage must be han-
dled and disposed of in conformance with applicable environmental regula-
tions.
WARNING Operator must be aware of pumpage and safety precautions to prevent physi-
cal 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 pre-
vent physical 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 properly 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 explo-
sion due to trapped fluid, resulting in severe physical injury and property dam-
age.
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.
1.4 General precautions
Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions 7

WARNING Noise:
Sound pressure levels may exceed 80 dbA in operating process plants. Clear
visual warnings or other indicators should be available to those entering an
area with unsafe noise levels. Personnel should wear appropriate hearing pro-
tection when working on or around any equipment, including pumps. Consider
limiting personnel’s exposure time to noise or, where possible, enclosing
equipment to reduce noise. Local law may provide specific guidance regard-
ing exposure of personnel to noise and when noise exposure reduction is re-
quired.
WARNING Temperature:
Equipment and piping surfaces may exceed 130ºF (54ºC) in operating proc-
ess plants. Clear visual warnings or other indicators should alert personnel to
surfaces that may reach a potentially unsafe temperature. Do not touch hot
surfaces. Allow pumps operating at a high temperature to cool sufficiently be-
fore performing maintenance. If touching a hot surface cannot be avoided,
personnel should wear appropriate gloves, clothing, and other protective gear
as necessary. Local law may provide specific guidance regarding exposure of
personnel to unsafe temperatures.
WARNING This product contains Carbon Black a chemical known to the State of Califor-
nia to cause cancer. For more information go to www.P65Warnings.ca.gov
1.5
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:
Description of Ex-Directives
The Ex-directives are a specification enforced in Europe and the United Kingdom for electrical and non-
electrical equipment installed in those locations. Ex-directives deal with the control of potentially explo-
sive atmospheres and the standards of equipment and protective systems used within these atmos-
pheres. The relevance of the Ex-requirements is not limited to Europe or the UK. You can apply these
guidelines to equipment installed in any potentially explosive atmosphere.
Guidelines for compliance
Compliance is fulfilled only when you operate the unit within its intended use. Do not change the condi-
tions of the service without the approval of an ITT representative. When you install or maintain explosion
proof products, always comply with the directive and applicable standards (for example, IEC/EN
60079-14).
1. Monitoring the liquid end temperature.
2. Maintaining proper bearing lubrication.
3. Ensuring that the pump is operated in the intended hydraulic range.
The Ex conformance is only applicable when the pump unit is operated within its intended use. Operat-
ing, 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 in-
cludes 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.
1.5
8 Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions

Current IOMs are available at https://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 Ex classified
environment, are identified by an Ex tag secured to the pump or the baseplate on which it is mounted. A
typical tag would look like this:
If applicable, your pump may have either a CE Ex (ATEX) tag or UKCA Ex tag affixed to the pump. See
the Safety section for a description of the symbols and codes. Typical nameplate only shown below, the
actual area classification may be different.
Figure 1: Typical Ex pump nameplate
Table 2: Temperature class definitions
Code Maximum permissible
pumpage temperature in °C | °F
Minimum permissible pumpage 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.
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
Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions 9

2 Pump Description
2.1 Introduction
The ITT Goulds Model 3500 heavy duty stock pump is a centrifugal pump designed to handle paper
stock up to approximately 16% O.D. consistency. The pump design incorporates special features to in-
duce flow into the pump suction and to remove air that is present in stock at higher consistencies.
2.2 Design concept
There are two major obstacles in pumping paper stock at consistencies above 8% with a centrifugal
pump: the formation of a fiber network that will not readily flow, and high air content which can cause air
binding of a standard centrifugal pump.
The Model 3500 pump is normally attached to a suction vessel or standpipe, and a constant level is
maintained above the suction centerline. An inducer mounted on the end of the pump shaft creates tur-
bulence in the suction standpipe (Fig. 2, Zone 1), breaking up the fiber network and separating air from
the pulp. The pulp is then induced to flow into the pump suction by the static head in the standpipe and
the pumping action of the inducer. The amount of turbulence required (minimum pump speed) as well as
the minimum standpipe level are a function of the stock type, quality, consistency and temperature of
each specific application.
Further air separation occurs due to the action of a centrifuge in Zone 2. The air collects in an annulus
around the shaft and then passes through balance holes in the impeller shroud. Any remaining paper
stock is separated from the air behind the impeller via a patented secondary separation device (U.S. Pat-
ent #5,087,171). The paper stock is pumped to the casing volute via large back pump-out vanes (Zone
3), and the air flows to atmosphere or to a vacuum source depending on operating conditions (Zone 5).
Pressure generation takes place in the impeller and casing volute in the normal manner once the air has
been removed (Zone 4).
2 Pump Description
10 Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions

Figure 2: Suction standpipe zones
2.3 Construction details
Casing - The casing is vertically split, top centerline discharge, providing a back pullout design for ease
of maintenance. A renewable sideplate is incorporated into the design to reduce maintenance costs. The
sideplate is sealed with an O-ring and gasket.
Impeller - The impeller is an open design with a full back shroud. It is designed for a matched close
clearance with the suction sideplate to provide optimum efficiency. The impeller has balance holes to al-
low air to pass through the back shroud. Remaining paper stock is returned to the casing volute via large
pump-out vanes.
The impeller is keyed to the shaft and sealed with PTFE O-rings.
Inducer - A rugged cast inducer breaks up the fiber network to promote entry of the stock into the pump
suction. The inducer threads onto the end of the pump shaft and is sealed with a PTFE O-ring.
Centrifuge - A centrifuge between the inducer and the impeller provides superior secondary air separa-
tion. The centrifuge is keyed to the shaft and sealed with PTFE O-rings.
Repeller - A patented (U.S. Patent # 5,087,171) repeller behind the impeller provides superior secondary
air separation. The repeller is keyed to the shaft and sealed with PTFE O-rings.
Stuffing Box Cover - The stuffing box cover contains a de-gasification nozzle through which excess air is
removed. Shaft sealing is accomplished with a mechanical seal as standard.
Shaft/Shaft Sleeve - The shaft is designed to minimize deflection in the seal area and at the impeller. It is
protected from the pumpage by a replaceable sleeve sealed with a PTFE O-ring.
2.3 Construction details
Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions 11

Power End - A heavy duty power end is provided for maximum reliability. It includes a duplex angular
contact thrust bearing and a cylindrical roller radial bearing for maximum load carrying ability. The bear-
ings are sized for a two year minimum L10 (14 year average) life under the worst operating conditions.
Oil lubrication is standard and the frame is sealed at both ends with labyrinth oil seals. An external axial
adjustment is provided to maintain the proper impeller clearance for optimum efficiency.
2.3 Construction details
12 Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions

3 Installation
3.1 Site / foundation
A pump should be located near the supply of liquid and have adequate space for operation, mainte-
nance, and inspection.
Baseplate mounted pumps are normally grouted on a concrete foundation, which has been poured on a
solid footing. The foundation must be able to absorb any vibration and to form a permanent, rigid support
for the pumping unit.
The location and size of the foundation bolts are shown on the outline assembly drawing, provided with
the pump data package.
Foundation bolts commonly used are sleeve type (Fig. 3) and J Type (Fig. 4). Both designs permit move-
ment for final bolt adjustment.
1
2
3
4
5
6
1. Baseplate
2. Shims
3. Foundation
4. Sleeve
5. Bolt
6. Dam
Figure 3: Sleeve type foundation bolts
3 Installation
Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions 13

1
2
3
4
1. Baseplate
2. Foundation
3. J bolt
4. Dam
Figure 4: J type foundation bolts
3.2 Level baseplate
1. Place two sets of wedges or shims on the foundation, one set on each side of every foundation bolt.
The wedges should extend 20 mm (.75 in) to 40 mm (1.5 in) above foundation, to allow for ade-
quate grouting. This will provide even support for the baseplate once it is grouted.
2. Remove water and/or debris from anchor bolt holes/sleeves prior to grouting. It the sleeve type bolts
are being used, fill the sleeves with rags to prevent grout from entering.
1
1. Shims or wedges
3.
Carefully lower baseplate onto foundation bolts.
4. Level baseplate to within 3.2 mm (.125 in) over length of the baseplate and to within 1.5 mm (0.875
in) over the width of the base by adjusting wedges.
5. Hand tighten bolts.
3.2 Level baseplate
14 Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions

1
1. Shims or wedges
3.3 Alignment and alignment procedure
The points at which alignment is checked and adjusted are:
•Initial Alignment is done prior to operation when the pump and the driver are at ambient tempera-
ture.
• Final Alignment is done after operation when the pump and driver are at operating temperature.
Alignment is achieved by adding or removing shims from under the feet of the driver and shifting equip-
ment horizontally as needed.
Accurate alignment of the equipment must be attained. Trouble-free operation can be accomplished by
following these procedures.
3.3.1
Alignment checks
Initial Alignment (Cold Alignment)
• Before Grouting Baseplate - To ensure alignment can be obtained.
• After Grouting Baseplate - To ensure no changes have occurred during grouting process.
• After Connecting Piping - To ensure pipe strains haven’t altered alignment. If changes have occur-
red, alter piping to remove pipe strains on pump flanges.
Final Alignment (Hot Alignment)
• After First Run - To obtain correct alignment when both pump and driver are at operating tempera-
ture. Thereafter, alignment should be checked periodically in accordance with plant operating pro-
cedures.
3.3.2 Alignment criteria
Good alignment is achieved when the dial indicator readings as specified in the alignment procedure
are .05 mm (.002 in.) Total Indicated Reading (T.I.R.) or less when the pump and driver are at operating
temperature (Final Alignment).
During the installation phase, however, it is necessary to set the parallel alignment in the vertical direc-
tion to a different criteria due to the differences in expansion rates of the pump and driver. Table 2 shows
recommended preliminary (cold) settings for electrical motor driven pumps based on different pumpage
3.3 Alignment and alignment procedure
Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions 15

temperatures. Driver manufacturers should be consulted for recommended cold settings for other types
of drivers (steam turbines, engines, etc.)
Table 3: Cold setting of parallel vertical alignment
Pumpage Temperature Set Driver Shaft
10° C (50° F) .05 mm (.002 in.) LOW
65° C (150° F) .03 mm (.001 in.) High
120° C (250° F) .12 mm (.005 in.) High
3.4 Set up
1. Mount two dial indicators on one of the coupling halves (X) so they contact the other coupling half
(Y) (Fig. 7).
Y - Motor end
X - Pump end
Figure 5: Dial indicator mounting
2. Check setting of indicators by rotating coupling half X to ensure indicators stay in contact with cou-
pling half Y but do not bottom out. Adjust indicators accordingly.
3.5 Measurement
1. To ensure accuracy of indicator readings, always rotate both coupling halves together so indicators
contact the same point on coupling half Y. This will eliminate any measurement problems due to
runout on coupling half Y.
2. Take indicator measurements with driver feet hold-down bolts tightened. Loosen hold down bolts
prior to making alignment corrections.
3. Take care not to damage indicators when moving driver during alignment corrections.
3.5.1 Angular alignment
A unit is in angular alignment when indicator A (Angular indicator) does not vary by more than .05 mm
(.002 in.) as measured at four points 90° apart.
Vertical Correction (Top-to-Bottom)
1. Zero indicator A at top dead center (12 o’clock) of coupling half Y.
2. Rotate indicators to bottom dead center (6 o’clock). Observe needle and record reading.
3.4 Set up
16 Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions

3. Negative Reading - The coupling halves are further apart at the bottom than at the top. Correct
by either raising the driver feet at the shaft end (add shims) or lowering feet at the other end (re-
move shims) (Fig. 8).
Figure 6:
1
Positive Reading - The coupling halves are closer at the bottom than at the top. Correct by either
lowering the driver feet at the shaft end (remove shims) or raising the driver feet at the other end
(add shims).
4. Repeat steps 1-3 until indicator A reads .05 mm (.002 in) or less.
Horizontal Correction (Side-to-Side)
1. Zero indicator A on left side of coupling half Y, 90° from top dead center (9 o’clock).
2. Rotate indicators through top dead center to the right side, 180° from the start (3 o’clock). Ob-
serve needle and record reading.
3. Negative Reading - The coupling halves are further apart on the right side than the left. Correct
by either sliding the shaft end of the driver to the left or the other end to the right.
Positive Reading - The coupling halves are closer together on the right side than the left. Correct
by either sliding the shaft end of the driver to the right or the other end to the left (Fig. 9).
Figure 7:
4. Repeat steps 1 through 3 until indicator A reads .005 mm (.002 in.) or less.
5. Re-check both horizontal and vertical readings to ensure adjustment of one did not disturb the
other. Correct as necessary.
3.5.2
Parallel alignment
A unit is in parallel alignment when indicator P (parallel indicator) does not vary by more than .005 mm
(.002 in.) as measured at four points 90° apart at operating temperature. Note the preliminary vertical
cold setting criteria, refer to Table 3: Cold setting of parallel vertical alignment on page 16.
3.5 Measurement
Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions 17

Vertical Correction (Top-to-Bottom)
1. Zero indicator P at top dead center of coupling (12 o’clock) half Y, see Figure 5: Dial indicator
mounting on page 16.
2. Rotate indicator to bottom dead center (6 o’clock). Observe needle and record reading.
3. Negative Reading - Coupling half X is lower than coupling half Y. Correct by removing shims of
thickness equal to half of the indicator reading under each driver foot.
Positive Reading - Coupling half X is higher than coupling half Y. Correct by adding shims of
thickness equal to half of the indicator reading from each driver foot (Fig. 10).
1
1. Shims
Figure 8:
NOTICE:
Equal amounts of shims must be added to or removed from each driver foot. Otherwise the
vertical angular alignment will be affected.
4. Repeat steps 1 through 3 until indicator reads within .05 mm (.002 in.) or less when hot, or per
Figure 5: Dial indicator mounting on page 16 when cold.
Horizontal Correction (Side-to-Side)
1. Zero indicator P on the left side of coupling half Y, 90° from top dead center (9 o’clock).
2. Rotate indicators through top dead center to the right side, 180° from the start (3 o’clock). Ob-
serve needle and record reading.
Negative Reading - Coupling half Y is to the left of coupling half X. Correct by sliding driver even-
ly in the appropriate direction (Fig. 11).
Figure 9:
Positive Reading - Coupling half Y is to the right of coupling half X. Correct by sliding driver even-
ly in the appropriate direction.
3.5 Measurement
18 Model 3500 Medium Consistency Pump System Installation, Operation and Maintenance Instructions