Goulds Pumps 3501 Manual

Installation, Operation, and
Maintenance Instructions
3501

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 .................................................................................................................................. 5
1.5 Parts .......................................................................................................................................................... 8
2 General Information ..........................................................................................................................................9
2.1 Mixer description ....................................................................................................................................... 9
2.2 Nameplate information .............................................................................................................................. 9
2.3 Receiving the mixer................................................................................................................................. 10
2.3.1 Storage Requirements ..................................................................................................................10
2.3.2 Handling ........................................................................................................................................ 11
3 Installation........................................................................................................................................................13
3.1 Site / foundation ...................................................................................................................................... 13
3.2 Level baseplate ....................................................................................................................................... 13
3.3 Alignment and alignment procedure........................................................................................................ 14
3.3.1 Alignment checks .......................................................................................................................... 15
3.3.2 Alignment criteria ..........................................................................................................................15
3.4 Set up ...................................................................................................................................................... 15
3.5 Measurement .......................................................................................................................................... 16
3.5.1 Angular alignment .........................................................................................................................16
3.5.2 Parallel alignment..........................................................................................................................17
3.5.3 Complete alignment ......................................................................................................................18
3.6 Grout baseplate....................................................................................................................................... 19
3.6.1 Alignment check............................................................................................................................20
3.7 Piping ...................................................................................................................................................... 20
3.7.1 General .........................................................................................................................................20
3.7.2 Inlet piping.....................................................................................................................................21
3.7.3 Outlet piping .................................................................................................................................. 21
3.7.4 Final piping check .........................................................................................................................21
3.8 Piping instructions ................................................................................................................................... 21
3.8.1 Liquid mixing .................................................................................................................................21
3.8.2 Gas mixing ....................................................................................................................................22
3.9 Spring mounted baseplates..................................................................................................................... 22
4 Operation..........................................................................................................................................................24
4.1 Preparation for start-up ........................................................................................................................... 24
4.2 Check rotation ......................................................................................................................................... 24
4.3 Couple mixer and driver .......................................................................................................................... 24
4.3.1 Check rotor axial clearance...........................................................................................................25
4.3.2 Lubricating bearings......................................................................................................................25
4.3.3 Shaft sealing .................................................................................................................................26
4.4 Starting mixer .......................................................................................................................................... 26
4.5 Operation................................................................................................................................................. 27
4.5.1 General considerations .................................................................................................................27
4.5.2 Operating at reduced capacity ......................................................................................................27
Table of Contents
3501 Installation, Operation, and Maintenance Instructions 1

4.5.3 Operating under freezing conditions .............................................................................................27
4.6 Shutdown ................................................................................................................................................ 27
4.7 Final alignment ........................................................................................................................................ 27
4.8 Interlocks ................................................................................................................................................. 28
5 Preventative Maintenance ..............................................................................................................................29
5.1 General comments .................................................................................................................................. 29
5.2 Maintenance schedule ............................................................................................................................ 29
5.3 Maintenance of bearings ......................................................................................................................... 29
5.3.1 Oil lubricated bearings ..................................................................................................................29
5.3.2 Grease lubricated bearings ........................................................................................................... 31
5.4 Maintenance of shaft seals...................................................................................................................... 33
5.4.1 Mechanical seals...........................................................................................................................33
5.5 Rotor axial clearance setting ................................................................................................................... 33
5.6 Dial indicator method............................................................................................................................... 34
5.7 Feeler gauge method .............................................................................................................................. 34
5.8 Mixer washdown...................................................................................................................................... 35
6 Disassembly and Reassembly .......................................................................................................................37
6.1 Required tools ......................................................................................................................................... 37
6.2 Preparation for disassembly.................................................................................................................... 37
6.3 Disassembly ............................................................................................................................................ 38
6.4 Removal of rotor...................................................................................................................................... 39
6.5 Removal of Taperbore™ PLUS seal chamber and mechanical seal....................................................... 40
6.6 Disassembly of bearing frame................................................................................................................. 41
6.7 Inspections .............................................................................................................................................. 42
6.8 Casing ..................................................................................................................................................... 42
6.9 Rotor........................................................................................................................................................ 42
6.10 Seal chamber ........................................................................................................................................ 42
6.11 Bearing frame ........................................................................................................................................ 43
6.12 Reassembly.......................................................................................................................................... 43
6.13 Reassembly of bearing frame ............................................................................................................... 45
6.14 Reassembly of taperbore™ plus seal chamber and mechanical seal................................................... 51
6.15 Installation of rotor................................................................................................................................. 51
6.16 Installation of casing foot and alignment pin ......................................................................................... 52
6.17 Installation of back pull-out assembly.................................................................................................... 53
7 Spare Parts ......................................................................................................................................................56
7.1 Recommended spare parts ..................................................................................................................... 56
7.1.1 Most desirable spare parts............................................................................................................56
7.1.2 Recommended spare parts...........................................................................................................56
7.1.3 Minimum recommended spare parts.............................................................................................56
7.2 3501 Mixer cross sectional and parts list with materials of construction ................................................. 57
7.3 How to order............................................................................................................................................ 58
7.4 Emergency service.................................................................................................................................. 58
Table of Contents
2 3501 Installation, Operation, and Maintenance Instructions

Preface
This manual provides instructions for the Installation, Operation, and Maintenance of the Goulds Model
3501 Optimix™ Medium Consistency Mixer. This manual covers the standard product plus common op-
tions that are available. For special options, supplemental instructions are supplied. This manual must be
read and understood before installation and start-up.
The design, materials, and workmanship incorporated in the construction of Goulds mixers makes them
capable of giving trouble-free service. The life and satisfactory service of any mechanical unit, however,
is enhanced and extended by correct application, proper installation, periodic inspection, condition moni-
toring and careful maintenance. This instruction manual was prepared to assist operators in understand-
ing the construction and the correct methods of installing, operating, and maintaining these mixers.
ITT - Goulds Pumps shall not be liable for physical injury, damage or delays caused by a failure to ob-
serve the instructions for Installation, Operation, and Maintenance contained in this manual.
Warranty is valid only when genuine ITT - Goulds parts are used.
Use of the equipment on a service other than stated in the order will nullify the warranty, unless written
approval is obtained in advance from ITT - Goulds Pumps.
To assure proper installation, supervision from an authorized manufacturer's representative is recom-
mended.
Additional manuals can be obtained by contacting your local Goulds representative.
This manual explains:
• Proper Installation
• Start-Up Procedures
• Operation Procedures
• Routine Maintenance
• Mixer Overhaul
• Troubleshooting
• Ordering Spare or Repair Parts
Table of Contents
3501 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 3501 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 http://www.gouldspumps.com/literature.
1.3 Safety
Definitions
Throughout this manual the words Warning, Caution, and Electrical 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.
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.
1.3 Safety
3501 Installation, Operation, and Maintenance Instructions 5

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 equip-
ment damage. Lift equipment only at specifically identified lifting points or as
instructed in the current IOM. Current manuals are available at www.gould-
spumps.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:
1.4 General precautions
6 3501 Installation, Operation, and Maintenance Instructions

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 Never operate a pump without coupling guard properly installed. Personal in-
jury will occur if pump is run without coupling guard.
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 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 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.
1.4 General precautions
3501 Installation, Operation, and Maintenance Instructions 7

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.
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 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.
1.5 Parts
8 3501 Installation, Operation, and Maintenance Instructions

2 General Information
2.1 Mixer description
Casing - Casings are side suction, side discharge, back pull-out designs, utilizing a spacer coupling to
allow for one craft maintenance. The alignment fit is protected from the pumpage with a confined gasket
between the casing and the seal chamber cover.
Rotor - The fully open multi-vane rotor is supplied on all mixers. It is engineered to effectively open and
loosen the fiber network to provide complete and efficient chemical or gas mixing. The rotors have been
designed to handle the tough medium consistency paper stock services. The rotor is keyed to the shaft
and held in position by a rotor locknut, sealed by a PTFE O-ring and secured with setscrews. The sleeve
side of the rotor is sealed by a PTFE O-ring for a dry shaft design.
Shaft Sleeves - The sleeve is a renewable hook type, positively driven by the rotor key. One end is free
to expand due to possible temperature variations. A PTFE O-ring prevents leakage under the sleeve.
Power End - The heavy duty bearing frame and housing are both constructed of cast iron. The frame is
bolted and rabbeted to the seal chamber. The inboard bearing (cylindrical roller) carries radial loads only
and is free to float axially within the bearing frame. The outboard bearing is 40° angular contact duplex
set mounted back-to-back, locked on the shaft by a threaded locknut and carries both radial and axial
loads. The frame is sealed with labyrinth seals as standard. Flood oil lubrication is standard. Grease lu-
brication is available as an option. No special parts are required to convert from grease to oil lubrication.
Bearing frame cooling can be supplied as an option with oil lubrication.
Seal Chamber - The seal chamber is especially designed for medium consistency mixing applications. Its
wide open design keeps the stock flowing without de-watering and binding the seal.
Hardware - All fasteners and tapped connections are metric.
Direction of Rotation - Clockwise (right hand) as viewed from the driver looking at the mixer shaft.
2.2 Nameplate information
Every mixer has two Goulds nameplates that provide information about the mixer. The tags are located
on the casing and bearing frame. When ordering spare parts you will need to identify the mixer model,
size, serial number, and the number of required parts.
Mixer Casing Tag - provides information about the mixer's hydraulic characteristics, see Figure 1: Mixer
casing tag - English on page 10 and Figure 2: Mixer casing tag - metric on page 10.
Bearing Frame Tag - provides recommended type of lubrication the mixer, see Figure 3: Bearing frame
tag on page 10.
2 General Information
3501 Installation, Operation, and Maintenance Instructions 9

Figure 1: Mixer casing tag - English
Figure 2: Mixer casing tag - metric
Figure 3: Bearing frame tag
2.3 Receiving the mixer
Inspect the mixer as soon as it is received. Carefully check that everything is in good order. Make notes
of damaged or missing items on the receipt and freight bill. File any claims with the transportation com-
pany as soon as possible.
2.3.1 Storage Requirements
Short Term: (Less than 6 months):
Goulds normal packaging procedure is designed to protect the mixer during shipping. Upon receipt store
in a covered and dry location.
2.3 Receiving the mixer
10 3501 Installation, Operation, and Maintenance Instructions

Long Term: (More than 6 months):
Requires special precautions. Preservative treatment of bearings and machined surfaces will be re-
quired. Rotate shaft several times every 3 months. Driver and coupling manufacturers should be contact-
ed for long term storage procedures.
NOTICE:
For pumps or back pull-outs supplied with cartridge mechanical seals, the centering tabs must
be in place and tightened, and the set screw collar loosened. Failure to take these steps could
result in damage to the mechanical seal or shaft sleeve.
2.3.2 Handling
Use care when moving mixers. Lifting equipment must be able to adequately support the entire assem-
bly. Hoist bare mixer using a suitable sling, under the suction and discharge flange and bearing frame.
Baseplate mounted units are moved with slings under the mixer casing flanges and driver. See Figure
4: Bare mixer on page 11, Figure 5: Baseplate mounted on page 12, and Figure 6: Baseplate and driv-
er on page 12, for examples of proper lifting techniques.
Figure 4: Bare mixer
2.3 Receiving the mixer
3501 Installation, Operation, and Maintenance Instructions 11

Figure 5: Baseplate mounted
Figure 6: Baseplate and driver
2.3 Receiving the mixer
12 3501 Installation, Operation, and Maintenance Instructions

3 Installation
3.1 Site / foundation
A mixer should have adequate space for operation, maintenance, and inspection.
Baseplate mounted mixers 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 mixing unit.
The location and size of the foundation bolts are shown on the outline assembly drawing provided with
the mixer data package.
Foundation bolts commonly used are sleeve type (Figure 7: Baseplate mounting using sleeve type bolts
on page 13) and J type (Figure 8: Baseplate mounting using J type bolts on page 13). Both designs
permit movement for final bolt adjustment.
Figure 7: Baseplate mounting using sleeve type bolts
Figure 8: Baseplate mounting using J type 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 (Figure 9: Shims
or wedges - side view on page 14 and Figure 10: Shims or wedges - top view on page 14).
2. Remove water and/or debris from anchor bolt holes/sleeves prior to grouting. If the sleeve type bolts
are being used, fill the sleeves with rags to prevent grout from entering.
3.
Carefully lower baseplate onto foundation bolts.
4. Level baseplate to within 3.2 mm (.125in.) over length of the baseplate and to within 1.5 mm (.060
in.) over the width of the base by adjusting wedges.
3 Installation
3501 Installation, Operation, and Maintenance Instructions 13

5. Hand tighten bolts.
Figure 9: Shims or wedges - side view
Figure 10: Shims or wedges - top view
3.3 Alignment and alignment procedure
WARNING:
Before beginning any alignment procedure, make sure driver power is locked out.
The points at which alignment is checked and adjusted are:
• Initial Alignment is done prior to operation when the mixer and the driver are at ambient tempera-
ture.
Final Alignment is done after operation when the mixer and driver are at operating temperature.
Alignment is achieved by adding or removing shims from under the feet of the driver and shifting
equipment horizontally as needed.
NOTICE:
Proper alignment is the responsibility of the installer and user of the unit.
Accurate alignment of the equipment must be attained. Trouble-free operation can be accomplished by
following these procedures.
3.3 Alignment and alignment procedure
14 3501 Installation, Operation, and Maintenance Instructions

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 mixer flanges
Final Alignment (Hot Alignment)
After First Run - To obtain correct alignment when both mixer and driver are at operating temperature.
Thereafter, alignment should be checked periodically in accordance with plant operating procedures.
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 mixer 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 differences in expansion rates of the mixer and driver. For Model 3501,
the Cold Setting of Parallel Vertical Alignment table shows recommended preliminary (cold) settings for
electric motor driven mixers based on different pumpage temperatures. Driver manufacturers should be
consulted for recommended cold settings for other types of drivers (steam turbines, engines, etc.).
Table 2: Cold Setting of Parallel Vertical Alignment
Cold Setting of Parallel Vertical Alignment
Fluid 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), see Figure 11: Dial indicator mounting on page 15.
Figure 11: Dial indicator mounting
3.4 Set up
3501 Installation, Operation, and Maintenance Instructions 15

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.
NOTICE:
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. 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 the driver feet at the other
end (remove shims), shown below.
Figure 12: Negative reading correction
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.
3.5 Measurement
16 3501 Installation, Operation, and Maintenance Instructions

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, shown below.
Figure 13: Positive reading correction
4. Repeat steps 1 through 3 until indicator A reads .05 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 .05 mm
(.002 in.) as measured at four points 90° apart at operating temperature. Note the preliminary vertical
cold setting criteria, refer to Table 2: Cold Setting of Parallel Vertical Alignment on page 15.
Vertical Correction (Top-to-Bottom)
1. Zero indicator P at top dead center of coupling (12 o’clock) half Y (see Figure 11: Dial indicator
mounting on page 15).
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, see below.
Figure 14: Positive reading correction
3.5 Measurement
3501 Installation, Operation, and Maintenance Instructions 17

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 P reads within .05 mm (.002 in.) or less when hot, or per
Table 2: Cold Setting of Parallel Vertical Alignment on page 15 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.
3. Negative Reading - Coupling half Y is to the left of coupling half X. Correct by sliding driver even-
ly in the appropriate direction.
Figure 15:
Positive Reading - Coupling half Y is to the right of coupling half X. Correct by sliding driver even-
ly in the appropriate direction.
NOTICE:
Failure to slide motor evenly will affect horizontal angular correction.
4. Repeat steps 1 through 3 until indicator P reads .05 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.
3.5.3 Complete alignment
A unit is in complete alignment when both indicators A (angular) and P (parallel) do not vary by more
than .05 mm (.002 in.) as measured at four points 90° apart.
Vertical Correction (Top-to-Bottom)
1. Zero indicators A and P at top dead center (12 o'clock) of coupling half Y.
2. Rotate indicator to bottom dead center (6 o'clock). Observe the needles and record the readings.
3. Make corrections as outlined previously.
Horizontal Correction (Side-to-Side)
1. Zero indicators A and 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 the needle, measure and record the reading.
3.5 Measurement
18 3501 Installation, Operation, and Maintenance Instructions