Goulds Pumps API3171 User manual

Installation, Operation,
and Maintenance Manual
Model API3171 with Oil Lubricated Bearing
Frame

Table of Contents
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual 1
Table of Contents
Introduction ............................................................................................................................. 4
Safety ........................................................................................................................................ 5
Safety terminology and symbols ............................................................................................. 5
Environmental safety .............................................................................................................. 6
User safety .............................................................................................................................. 7
Precautions before work ....................................................................................................... 7
Ex-approved products ............................................................................................................. 8
Product warranty ..................................................................................................................... 9
Transportation and Storage ................................................................................................. 10
Inspect the delivery ............................................................................................................... 10
Inspect the package ........................................................................................................... 10
Inspect the unit ................................................................................................................... 10
Transportation guidelines ...................................................................................................... 10
Pump handling ................................................................................................................... 10
Lifting methods ................................................................................................................... 10
Storage guidelines .............................................................................................................. 11
General description ............................................................................................................... 13
Enclosed lineshaft ................................................................................................................. 14
General description i-ALERT®2 Equipment Condition Monitor ......................................... 16
Nameplate information ......................................................................................................... 17
Permissible temperatures .................................................................................................... 19
Installation ............................................................................................................................. 20
Pre-installation ...................................................................................................................... 20
Inspect the pump ................................................................................................................ 20
Pump location guidelines .................................................................................................... 21
Concrete foundation requirements ..................................................................................... 21
Support plate installation ....................................................................................................... 22
Install the support plate with a pit cover .............................................................................. 22
Install the support plate without a pit cover ......................................................................... 22
Motor support and seal cover installation .............................................................................. 23
Install the packed stuffing box ............................................................................................... 24
Install the pump, driver, and coupling .................................................................................... 25
Motor installation and coupling alignment ............................................................................. 25
Install the motor .................................................................................................................. 26
Alignment checks ............................................................................................................... 26
Permitted indicator values for alignment checks ................................................................ 26
Align the coupling ............................................................................................................... 27
Float control installation ........................................................................................................ 27
Install the Square D 9036 simplex and 9038 duplex float controls ........................................ 28
Piping checklists ................................................................................................................... 30
General piping checklist ..................................................................................................... 30
Suction piping for optional dry pit, outside tank mount, and tailpipe applications ............... 31
Steam lines ......................................................................................................................... 31
Final piping checklist .......................................................................................................... 32

Table of Contents
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual2
Commissioning, Startup, Operation, and Shutdown ......................................................... 33
Preparation for startup .......................................................................................................... 33
Check the rotation ................................................................................................................. 34
Lubricate bearings ................................................................................................................ 34
Thrust bearing lubrication ................................................................................................... 34
Flood oil lubrication ............................................................................................................. 34
Pure oil-mist lubrication ......................................................................................................... 37
Flush the steady bearings ..................................................................................................... 37
Sealed bearings .................................................................................................................... 38
Lubricate the sealed bearings with grease cups ................................................................... 38
Fill the housing ...................................................................................................................... 39
Adjust the flow (preferred method) ........................................................................................ 39
Adjust the flow (alternate method) ........................................................................................ 39
Shaft sealing with a mechanical seal .................................................................................... 40
Steam jacket pumps (molten sulfur construction) ................................................................. 40
Impeller-clearance setting ..................................................................................................... 40
Set the impeller clearance - Dial indicator method ............................................................. 41
Set the impeller clearance – EZ Adjust method .................................................................. 43
Pump priming ........................................................................................................................ 45
Install the coupling guard ...................................................................................................... 45
Start the pump ...................................................................................................................... 46
Pump operation precautions ................................................................................................. 47
i-ALERT®2 Equipment Health Monitor .................................................................................. 48
Shut down the pump ............................................................................................................. 48
Make the final alignment of the pump and driver ................................................................... 49
Maintenance ........................................................................................................................... 50
Maintenance schedule .......................................................................................................... 50
Bearing maintenance ............................................................................................................ 51
Thrust bearings .................................................................................................................. 51
Lubricate the bearings after a shutdown period .................................................................. 51
Lubricating oil requirements ............................................................................................... 51
Steady bearings ................................................................................................................. 51
Shaft-seal maintenance ........................................................................................................ 51
Removal and installation of Mechanical seal ...................................................................... 51
Mechanical-seal maintenance ............................................................................................ 53
Packed stuffing-box maintenance ...................................................................................... 53
Disassembly .......................................................................................................................... 55
Disassembly precautions ...................................................................................................... 55
Tools required ....................................................................................................................... 55
Drain the pump ..................................................................................................................... 56
Remove the pump from the sump ......................................................................................... 57
Remove the impeller ............................................................................................................. 58
Disassemble bearing frame .................................................................................................. 59
Disassemble the column ....................................................................................................... 60
Preassembly inspections ..................................................................................................... 62
Replacement guidelines ........................................................................................................ 62
Shaft replacement guidelines ................................................................................................ 63
Bearings inspection ............................................................................................................... 64
Bearing Frame inspection ..................................................................................................... 64
Bearing carrier inspection ..................................................................................................... 65
Bearing fits and tolerances .................................................................................................... 66
Reassembly ........................................................................................................................... 68
Assembly of Motor Support to Mounting Plate ...................................................................... 68
Assemble Seal cover in Motor support ............................................................................... 68

Table of Contents
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual 3
Assemble the column ............................................................................................................ 68
Assemble the impeller, suction cover, and strainer ............................................................... 69
Shaft sealing ......................................................................................................................... 69
Seal the shaft with a Labyrinth seal .................................................................................... 69
Seal the shaft with a packed stuffing box ............................................................................ 70
Seal the shaft with a cartridge mechanical seal .................................................................. 71
Assemble bearing frame ....................................................................................................... 72
Assemble Bearings on carrier ............................................................................................... 73
Assemble the bearing frame, bearing carrier and end cover ................................................. 75
Assemble the discharge elbow, pipe and auxiliary piping ..................................................... 77
Troubleshooting .................................................................................................................... 78
Operation troubleshooting ..................................................................................................... 78
Assembly troubleshooting ..................................................................................................... 79
i-ALERT®2 Equipment Health Monitor troubleshooting ......................................................... 79
Cross-sectional diagram ...................................................................................................... 80
Dimensional drawings .......................................................................................................... 81
Parts list ................................................................................................................................. 82
Other Relevant Documentation or Manuals ........................................................................ 84
Local ITT Contacts ................................................................................................................ 85
Regional offices .................................................................................................................... 85

Introduction
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual4
Introduction
Purpose of this manual
The purpose of this manual is to provide necessary information for:
• Installation
• Operation
• Maintenance
CAUTION:
Failure to observe the instructions contained in this manual could result in personal injury and
property damage, and may void the warranty. Read this manual carefully before installing and
using the product.
NOTICE:
Save this manual for future reference and keep it readily available.

Safety
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual 5
Safety WARNING:
• The operator must be aware of the pumpage and take appropriate safety precautions to
prevent physical injury.
• Risk of serious injury or death. If any pressure-containing device is over-pressurized, it can
explode, rupture, or discharge its contents. It is critical to take all necessary measures to
avoid over-pressurization.
• Risk of death, serious personal injury, and property damage. Installing, operating, or
maintaining the unit using any method not prescribed in this manual is prohibited.
Prohibited methods include any modification to the equipment or use of parts not provided
by ITT. If there is any uncertainty regarding the appropriate use of the equipment, please
contact an ITT representative before proceeding.
• Risk of serious personal injury. Applying heat to impellers, propellers, or their retaining
devices can cause trapped liquid to rapidly expand and result in a violent explosion. This
manual clearly identifies accepted methods for disassembling units. These methods must
be adhered to. Never apply heat to aid in their removal unless explicitly stated in this
manual.
• If the pump or motor is damaged or leaking, electric shock, fire, explosion, liberation of
toxic fumes, physical harm, or environmental damage may result. Do not operate the unit
until the problem has been corrected or repaired.
• Risk of serious personal injury or property damage. Dry running may cause rotating parts
within the pump to seize to non-moving parts. Do not run dry.
• Risk of death, serious personal injury, and property damage. Heat and pressure buildup
can cause explosion, rupture, and discharge of pumpage. Never operate the pump with
suction and/or discharge valves closed.
• Running a pump without safety devices exposes operators to risk of serious personal
injury or death. Never operate a unit unless appropriate safety devices (guards, etc.) are
properly installed. See specific information about safety devices in other sections of this
manual.
CAUTION:
Risk of injury and/or property damage. Operating a pump in an inappropriate application can
cause over pressurization, overheating, and/or unstable operation. Do not change the service
application without the approval of an authorized ITT representative.
Safety terminology and symbols
About safety messages
It is extremely important that you read, understand, and follow the safety messages and
regulations carefully before handling the product. They are published to help prevent these
hazards:
• Personal accidents and health problems
• Damage to the product
• Product malfunction
Hazard levels
Hazard level Indication
DANGER: A hazardous situation which, if not avoided, will
result in death or serious injury

Safety
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual6
Hazard level Indication
WARNING: A hazardous situation which, if not avoided, could result in death or serious injury
CAUTION: A hazardous situation which, if not avoided, could result in minor or moderate injury
NOTICE: • A potential situation which, if not avoided,
could result in undesirable conditions
• A practice not related to personal injury
Hazard categories Hazard categories can either fall under hazard levels or let specific symbols replace the
ordinary hazard level symbols.
Electrical hazards are indicated by the following specific symbol:
Electrical Hazard:
These are examples of other categories that can occur. They fall under the ordinary hazard
levels and may use complementing symbols:
• Crush hazard
• Cutting hazard
• Arc flash hazard
The Ex symbol
The Ex symbol indicates safety regulations for Ex-approved products when used in
atmospheres that are potentially explosive or flammable.
Environmental safety
The work area Always keep the station clean to avoid and/or discover emissions.
Waste and emissions regulations
Observe these safety regulations regarding waste and emissions:
• Appropriately dispose of all waste.
• Handle and dispose of the processed liquid in compliance with applicable environmental
regulations.
• Clean up all spills in accordance with safety and environmental procedures.
• Report all environmental emissions to the appropriate authorities.
WARNING:
If the product has been contaminated in any way, such as from toxic chemicals or nuclear
radiation, do NOT send the product to ITT unless it has been properly decontaminated.
Electrical installation
For electrical installation recycling requirements, consult your local electric utility.

Safety
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual 7
Recycling guidelines
Always follow local laws and regulations regarding recycling.
User safety
General safety rules
These safety rules apply:
• Always keep the work area clean.
• Pay attention to the risks presented by gas and vapors in the work area.
• Avoid all electrical dangers. Pay attention to the risks of electric shock or arc flash hazards.
• Always bear in mind the risk of drowning, electrical accidents, and burn injuries.
Safety equipment Use safety equipment according to the company regulations. Use this safety equipment within
the work area:
• Helmet
• Safety goggles, preferably with side shields
• Protective shoes
• Protective gloves
• Gas mask
• Hearing protection
• First-aid kit
• Safety devices
Electrical connections
Electrical connections must be made by certified electricians in compliance with all internation-
al, national, state, and local regulations. For more information about requirements, see sections
dealing specifically with electrical connections.
Precautions before work
Observe these safety precautions before you work with the product or are in connection with
the product:
• Provide a suitable barrier around the work area, for example, a guard rail.
• Make sure that all safety guards are in place and secure.
• Recognize the site emergency exits, eye wash stations, emergency showers and toilets.
• Allow all system and pump components to cool before you handle them.
• Make sure that you have a clear path of retreat.
• Make sure that the product cannot roll or fall over and injure people or damage property.
• Make sure that the lifting equipment is in good condition.
• Use a lifting harness, a safety line, and a breathing device as required.
• Make sure that the product is thoroughly clean.
• Make sure that there are no poisonous gases within the work area.
• Make sure that you have quick access to a first-aid kit.
• Disconnect and lock out power before servicing.
• Check the explosion risk before you weld or use electric hand tools.
Wash the skin and eyes
1. Follow these procedures for chemicals or hazardous fluids that have come into contact with
your eyes or your skin:

Safety
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual8
Condition Action
Chemicals or hazardous
fluids in eyes 1. Hold your eyelids apart forcibly with your fingers.
2. Rinse the eyes with eyewash or running water for at least 15 minutes.
3. Seek medical attention.
Chemicals or hazardous
fluids on skin 1. Remove contaminated clothing.
2. Wash the skin with soap and water for at least 1 minute.
3. Seek medical attention, if necessary.
Ex-approved products
Follow these special handling instructions if you have an Ex-approved unit.
Personnel requirements
These are the personnel requirements for Ex-approved products in potentially explosive
atmospheres:
• All work on the product must be carried out by certified electricians and ITT-authorized
mechanics. Special rules apply to installations in explosive atmospheres.
• All users must know about the risks of electric current and the chemical and physical
characteristics of the gas, the vapor, or both present in hazardous areas.
• Any maintenance for Ex-approved products must conform to international and national
standards (for example, IEC/EN 60079-17).
ITT disclaims all responsibility for work done by untrained and unauthorized personnel.
Product and product handling requirements
These are the product and product handling requirements for Ex-approved products in
potentially explosive atmospheres:
• Only use the product in accordance with the approved motor data.
• The Ex-approved product must never run dry during normal operation. Dry running during
service and inspection is only permitted outside the classified area.
• Before you start work on the product, make sure that the product and the control panel are
isolated from the power supply and the control circuit, so they cannot be energized.
• Do not open the product while it is energized or in an explosive gas atmosphere.
• Make sure that thermal contacts are connected to a protection circuit according to the
approval classification of the product, and that they are in use.
• Intrinsically safe circuits are normally required for the automatic level-control system by the
level regulator if mounted in zone 0.
• The yield stress of fasteners must be in accordance with the approval drawing and the
product specification.
• Do not modify the equipment without approval from an authorized ITT representative.
• Only use parts that are provided by an authorized ITT representative.
Description of ATEX
The ATEX directives are a specification enforced in Europe for electrical and non-electrical
equipment installed in Europe. ATEX deals with the control of potentially explosive atmos-
pheres and the standards of equipment and protective systems used within these atmos-
pheres. The relevance of the ATEX requirements is not limited to Europe. 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 conditions 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).

Product warranty
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual 9
Product warranty
Coverage ITT undertakes to remedy faults in products from ITT under these conditions:
• The faults are due to defects in design, materials, or workmanship.
• The faults are reported to an ITT representative within the warranty period.
• The product is used only under the conditions described in this manual.
• The monitoring equipment incorporated in the product is correctly connected and in use.
• All service and repair work is done by ITT-authorized personnel.
• Genuine ITT parts are used.
• Only Ex-approved spare parts and accessories authorized by ITT are used in Ex-approved
products.
Limitations The warranty does not cover faults caused by these situations:
• Deficient maintenance
• Improper installation
• Modifications or changes to the product and installation made without consulting ITT
• Incorrectly executed repair work
• Normal wear and tear
ITT assumes no liability for these situations:
• Bodily injuries
• Material damages
• Economic losses
Warranty claim ITT products are high-quality products with expected reliable operation and long life. However,
should the need arise for a warranty claim, then contact your ITT representative.

Transportation and Storage
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual10
Transportation and Storage
Inspect the delivery
Inspect the package
1. Inspect the package for damaged or missing items upon delivery.
2. Note any damaged or missing items on the receipt and freight bill.
3. File a claim with the shipping company if anything is out of order.
If the product has been picked up at a distributor, make a claim directly to the distributor.
Inspect the unit
1. Remove packing materials from the product.
Dispose of all packing materials in accordance with local regulations.
2. Inspect the product to determine if any parts have been damaged or are missing.
3. If applicable, unfasten the product by removing any screws, bolts, or straps.
For your personal safety, be careful when you handle nails and straps.
4. Contact your sales representative if anything is out of order.
Transportation guidelines
Pump handling
WARNING:
Dropping, rolling or tipping units, or applying other shock loads, can cause property damage
and personal injury. Ensure that the unit is properly supported and secure during lifting and
handling.
CAUTION:
Risk of injury or equipment damage from use of inadequate lifting devices. Ensure lifting
devices (such as chains, straps, forklifts, cranes, etc.) are rated to sufficient capacity.
Lifting methods
WARNING:
• Risk of serious personal injury or equipment damage. Proper lifting practices are critical to
safe transport of heavy equipment. Ensure that practices used are in compliance with all
applicable regulations and standards.
• Safe lifting points are specifically identified in this manual. It is critical to lift the equipment
only at these points. Integral lifting eyes or eye bolts on pump and motor components are
intended for use in lifting the individual components only.
• Lifting and handling heavy equipment poses a crush hazard. Use caution during lifting and
handling and wear appropriate Personal Protective Equipment (PPE, such as steel-toed
shoes, gloves, etc.) at all times. Seek assistance if necessary.
• Assembled units and their components are heavy. Failure to properly lift and support this
equipment can result in serious physical injury and/or equipment damage. Lift equipment
only at the specifically identified lifting points. Lifting devices such as swivel hoist rings,
shackles, slings and spreaders must be rated, selected, and used for the entire load being
lifted.
Use swivel hoist rings (available as an option) and suitable slings in order to lift the pump,
without motor, to a vertical position and then lower the unit into the sump. Then use the lifting
lugs on the motor and a suitable sling in order to hoist the motor into position. Use a tag line
attached to the casing end in order to prevent the pump from swinging.

Transportation and Storage
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual 11
Examples
Figure 1: Example of lifting motor properly with
lifting lugs
Figure 2: Example of lifting pump properly with
sling
Storage guidelines
Pump storage requirements
Requirements Vertical pumps require proper preparation for storage and regular maintenance during storage.
The pump is considered in storage when it has been delivered to the job site and is awaiting
installation.
For specific requirements for storing motors, gearheads, and engines, contact the equipment
manufacturer.
Storage preparation
Condition Proper preparation
Indoor storage area (preferred) • Pave the area.
• Clean the area.
• Drain the area and keep it free from flooding.

Transportation and Storage
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual12
Condition Proper preparation
Outdoor storage area (when indoor
storage is not available) • Observe all indoor storage requirements.
• Use weather-proof coverings such as flame-resistant sheet-
ing or tarpaulins.
• Place coverings in a manner that maximizes drainage and
air circulation.
• Tie coverings down in order to protect the pump from wind
damage.
Placement of pumps and component
parts • Place the unit on skids, pallets, or shoring higher than 15
cm | 6 in. from the ground for good air circulation.
• Sort the parts in order to permit easy access for inspection
and/or maintenance without excessive handling.
Stacking of units or component parts • Make sure that racks, containers, or crates bear the full
weight of units or parts in order to prevent distortion.
• Keep identification markings readily visible.
• Immediately replace any cover you remove for internal
access.
Rotation of the pump • Rotate the shaft counterclockwise once a month, at a
minimum.
• Never leave the shaft in a previous position or in the
extreme raised or lowered lateral position.
• Make sure that the shaft rotates freely.
Controlled storage facilities • Maintain an even temperature of 6°C | 10°F or higher above
the dew point.
• Keep the relative humidity to less than 50%.
• Make sure that there is little or no dust.
Uncontrolled storage facilities that
have uneven temperatures, higher hu-
midity, and/or dusty conditions) • Inspect the unit periodically to make sure that all preserva-
tives are intact.
• Seal all pipe threads and flanged pipe covers with tape.
When pump is not in regular operation
If a pump has been installed, but is not in regular operation for an extended period of time, such
as during a seasonal shutdown, then operate it for at least 15 minutes every two weeks, if
possible.
Prepare the pump for long-term storage
For storage periods over six months, you must follow the pump storage requirements and this
procedure:
1. Inspect the lube-oil and seal-flush piping and either fill the piping with rust-preventative oil,
or recoat the piping periodically in order to prevent corrosion.
2. Place 4.5 kg | 10 lbs of moisture-absorbing desiccant or 2.3 kg | 5.0 lbs of vapor-phase
inhibitor crystals near the center of the pump.
3. If the unit is assembled, place an additional 0.5 kg | 1 lb in the discharge nozzle and
securely fasten the nozzle to the discharge elbow.
4. Install a moisture indicator near the perimeter of the unit.
5. Cover the unit with black polyethylene with a minimum thickness of 6.0 mil (0.15 mm), and
seal it with tape.
6. Provide a small ventilation hole approximately 12.0 mm | 0.5 in. diameter.
7. Provide a roof or shed shelter in order to protect the unit from direct exposure to the
elements.
8. If a vertical pump will be stored in a horizontal position, be sure to support the pump
sufficiently to avoid any deformation or bending of the pump.

General description
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual 13
General description
Product description
The Model API 3171 is a vertical submerged bearing sump and process pump that meets the
requirements of the 11th edition of API Standard 610 (ISO 13709).
This model is based on three bearing frames with 17 hydraulic sizes.
This table shows the number of hydraulic sizes available for each drive-unit size group. Note
that each pump has a choice of two different discharge pipes which results in four
combinations.
Drive-unit size group Number of hydraulic sizes
S/ST 9
M/MT 10
L 2
WARNING:
Use of equipment unsuitable for the environment can pose risks of ignition and/or explosion.
Ensure that the code classifications on the pump are compatible with the specific environment
in which the equipment is to be installed. If they are not compatible, do not operate the
equipment and contact an ITT representative before proceeding.
Casing The casing has these features:
• A tangential discharge
• Is self-venting
• Has an integral bearing retainer
• Is precision-bored in order to ensure permanent alignment between the column casing,
suction cover, and bearing
Impeller The impeller is fully open, keyed to the shaft, and held in place by a self-locking capscrew in
order to ensure positive locking and prevent damage from reverse rotation. Impellers are spin-
balanced (single plane) to ISO G2.5. The impeller is provided with back vanes in order to
reduce the axial thrust and prevent the entrance of solids.
The impellers on this pump do not meet the dimensional requirements for dynamic balancing.
Impeller clearance changes are accomplished by means of the EZ-Adjust (TM) bearing carrier
(Patent Pending).
Strainer The flat plate strainer is designed to maximize draw-down in a given sump depth. Openings are
sized to prevent the entrance of large solids that are commonly found in open sumps.
Discharge elbow The discharge elbow is designed to allow the pump to fit into the smallest possible opening. A
threaded connection to the discharge pipe allows the pipe to be changed without removing the
pump from the sump.
Column pipe The column pipe has flanged connections that are machined in order to ensure true parallelism
and to maintain steady bearings concentric with the shaft.

General description
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual14
Shaft The standard design uses a one-piece shaft in order to ensure accurate alignment. The shaft is
precision-ground, polished, and straightened to keep vibration and deflection to a minimum.
Standard bearing spans keep the shaft well below first critical speed for all sizes.
Bearings The thrust bearing is flood oil lubricated and consists of a pair of single-row, angular contact
ball bearings arranged back-to back. The bearing is shouldered and locked to the bearing
carrier and thrust bearing frame. This enables the bearing to carry all of the thrust loads and
some of the radial load. All fits are precision-machined to industry standards. The steady
bearings are press fit sleeve bearings. Fits are designed for optimum life under all operating
conditions.
Thrust Bearing Frame
• Flood-oil lubrication is standard.
• No machining is required to convert from oil to oil-mist lubrication.
• Oil-mist lubrication is optional.
• The oil level is checked through a sight glass.
• The power end is sealed with labyrinth seals.
• Carbon steel construction and precision-machined
• The power end is made in the following sizes:
• S
• M
• L
Seals
Seal type Description
Upper labyrinth seal This seal is used to exclude contaminants from the thrust
bearing.
Carbon PTFE casing collar This seal is installed immediately behind the impeller in the
casing in order to minimize recirculation back to the sump and
maximize hydraulic efficiency.
Motor support Motor supports are steel construction and precision-machined in order to maintain proper
alignment between the motor and pump shaft. Motor supports are designed for NEMA/IEC
vertical C-face as standard. It is also designed to keep the bearing frame elevated from the
mounting plate allowing air to circulate for increased cooling. It also facilitates removal of
bearing frame and mechanical seal without disturbing the motor.
Direction of rotation
The shaft rotates clockwise when you look down on the pump shaft.
Enclosed lineshaft
The enclosed lineshaft design lends itself well for applications where abrasives are present in
the pumped fluid, or when a bearing lubricant other than the pumped fluid is required.
Lubrication system
CAUTION:
The fluid must run continuously to ensure flow out of the column at all times. If the flush stops,
the fluid in the sump can back up into the column. This contaminates the bearings.

General description
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual 15
The main feature of this modified design is a positive lubrication system for all bearings. This
design requires a minimum of lubrication fluid due to the bushing located at the bottom of the
column adapter housing directly above the impeller.
Acceptable leak rates
Leaks (flows) across the bushing for certain pressure differentials are shown in this table.
Higher pressures will result in higher leaks.
Table 1: Bushing leak rate
Pressure differential (PSI) Approximate leak rate (GPM)
3.0 0.33
5.0 0.44
7.5 0.60
Standard materials of construction
• Floating bushings are 18-8 stainless steel housing and spring with a glass-filled PTFE
bushing.
• Flush tubing is steel.
Drawing Positive flow must be maintained at all times.
1. Flush Inlet connection 1/4 pressure = 3 PSI + "P" PSI
2. Maximum liquid level "P" PSI above suction
NOTICE:
Grease lubricated bearing frame used for illustration purposes

General description i-ALERT®2 Equipment Condition Monitor
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual16
General description i-ALERT®2 Equipment
Condition Monitor
Description The i-ALERT®2 Equipment Condition Monitor is a compact, battery-operated monitoring device
that continuously measures the vibration and temperature of the pump power end. The i-
ALERT®2 sensor uses blinking red LEDs and wireless notification to alert the pump operator
when the pump exceeds vibration and temperature limits. This allows the pump operator to
make changes to the process or the pump before a catastrophic failure occurs. The Condition
Monitor is also equipped with a single green LED to indicate when it is operational and has
sufficient battery life. (i-ALERT®2 Bluetooth Equipment Condition Monitor option available. The
i-ALERT®2 monitor allows customers to identify potential problems before they become costly
failures. It tracks vibration, temperature and run-time hours and wirelessly syncs the data with a
smart phone or tablet the i-ALERT®2 mobile app. More information available on
More information available on http://www.ittproservices.com/aftermarket-products/monitoring/i-
alert2/i-ALERT2.com

Nameplate information
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual 17
Nameplate information
Important information for ordering
Every pump has a nameplate that provides information about the pump. The nameplate is
located on the motor support.
When you order spare parts, identify this pump information:
• Model
• Size
• Serial number
• Item numbers of the required parts
Item numbers can be found in the spare parts list.
Refer to the nameplate on the pump casing for most of the information. See Parts List for item
numbers.
Nameplate on the pump casing using English units
Figure 3: Nameplate on the pump casing using English units
Table 2: Explanation of nameplate on the pump casing
Nameplate field Explanation
IMPLR. DIA. Impeller diameter, in inches
MAX. DIA. Maximum impeller diameter, in inches
GPM Rated pump flow, in gallons per minute
FT HD Rated pump head, in feet
RPM Rated pump speed, revolutions per minute
MOD. Pump model
SIZE Size of the pump
STD. NO. ANSI standard designation
MAT L. CONST. Material of which the pump is constructed
SER. NO. Serial number of the pump
MAX DSGN PSI @
100ºF Maximum pressure at 100ºF according to the pump design

Nameplate information
Model API3171 with Oil Lubricated Bearing Frame Installation, Operation, and Maintenance Manual18
Nameplate on the pump casing using metric units
Figure 4: Metric units - nameplate on pump casing
Table 3: Explanation of the nameplate on the pump casing
Nameplate field Explanation
IMPLR. DIA. Impeller diameter
MAX. DIA. Maximum impeller diameter
M3/HR Rated pump flow, in cubic meters per hour
M HD Rated pump head, in meters
RPM Rated pump speed, in revolutions per minute
MOD. Pump model
SIZE Size of the pump
STD. NO. ANSI standard designation
MAT L. CONST Material of which the pump is constructed
SER. NO. Serial number of the pump
MAX. DSGN KG/CM3@ 20°C Kilograms per cubic centimeter at 20°C
ATEX nameplate
Figure 5: ATEX nameplate
Nameplate field Explanation
II Group 2
2 Category 2
G/D Pump can be used when gas and dust are present
T4 Temperature class
WARNING:
Use of equipment unsuitable for the environment can pose risks of ignition and/or explosion.
Ensure that the code classifications on the pump are compatible with the specific environment
in which the equipment is to be installed. If they are not compatible, do not operate the
equipment and contact an ITT representative before proceeding.