Goulds Pumps 3420 User manual

Installation, Operation,
and Maintenance Manual
Model 3420

Table of Contents
Model 3420 Installation, Operation, and Maintenance Manual 1
Table of Contents
Introduction and Safety .......................................................................................................... 4
Introduction ............................................................................................................................. 4
Safety ...................................................................................................................................... 5
Safety terminology and symbols ........................................................................................... 5
Environmental safety ............................................................................................................ 6
User safety ........................................................................................................................... 7
Ex-approved products .......................................................................................................... 8
Monitoring equipment ........................................................................................................... 9
Product warranty ..................................................................................................................... 9
Transportation and Storage ................................................................................................. 10
Inspect the delivery ............................................................................................................... 10
Inspect the package ........................................................................................................... 10
Inspect the unit ................................................................................................................... 10
Transportation guidelines ...................................................................................................... 10
Lifting methods ................................................................................................................... 10
Bare pump .......................................................................................................................... 11
Pump and base .................................................................................................................. 11
Pump, base, and motor ...................................................................................................... 11
Storage guidelines ................................................................................................................ 11
Pump storage requirements ............................................................................................... 11
Product Description .............................................................................................................. 13
General Description .............................................................................................................. 13
Pump group definitions ....................................................................................................... 14
Nameplate information .......................................................................................................... 14
Installation ............................................................................................................................. 18
Pre-installation ...................................................................................................................... 18
Pump location guidelines .................................................................................................... 18
Foundation requirements ................................................................................................... 19
Baseplate-mounting procedures ........................................................................................... 20
Prepare the baseplate for mounting ................................................................................... 20
Prepare the foundation for mounting .................................................................................. 20
Install and level the baseplate ............................................................................................ 21
Install the pump, driver, and coupling .................................................................................... 21
Pump-to-driver alignment ...................................................................................................... 22
Alignment checks ............................................................................................................... 22
Permitted indicator values for alignment checks ................................................................ 22
Alignment measurement guidelines ................................................................................... 23
Attach the dial indicators for alignment ............................................................................... 23
Perform angular alignment for a vertical correction ............................................................ 24
Perform angular alignment for a horizontal correction ........................................................ 24
Perform parallel alignment for a vertical correction ............................................................. 24
Perform parallel alignment for a horizontal correction ........................................................ 25
Perform complete alignment for a vertical correction .......................................................... 25
Perform complete alignment for a horizontal correction ..................................................... 26
Grout the baseplate .............................................................................................................. 26
Piping checklists ................................................................................................................... 27
General piping checklist ..................................................................................................... 27
Suction-piping checklist ...................................................................................................... 28
Final piping checklist .......................................................................................................... 29

Table of Contents
Model 3420 Installation, Operation, and Maintenance Manual2
Commissioning, Startup, Operation, and Shutdown ......................................................... 30
Preparation for startup .......................................................................................................... 30
Check the rotation - Frame Mounted .................................................................................. 31
Couple the pump and driver ............................................................................................... 31
Install the coupling guard .................................................................................................... 32
Bearing lubrication ................................................................................................................ 37
Oil settings .......................................................................................................................... 37
Lubricating-oil requirements ............................................................................................... 37
Acceptable oil for lubricating bearings ................................................................................ 38
Lubricate the bearings with oil ............................................................................................ 38
Lubricate the bearings with pure or purge-oil mist (optional) .............................................. 39
Lubricating-grease requirements ........................................................................................ 39
Regrease the grease-lubricated bearings .......................................................................... 40
Shaft-sealing options ............................................................................................................ 40
Connection of sealing liquid for mechanical seals .............................................................. 40
Packed stuffing box option ................................................................................................. 41
Connection of sealing liquid for a packed stuffing box ........................................................ 41
Seal the shaft with a packed stuffing box ............................................................................ 41
Pump priming ........................................................................................................................ 42
Prime with the suction supply above the pump ................................................................... 42
Prime with the suction supply below the pump ................................................................... 43
Prime with an ejector .......................................................................................................... 45
Start the pump ...................................................................................................................... 45
Pump operation precautions ................................................................................................. 46
Shut down the pump ............................................................................................................. 47
Make the final alignment of the pump and driver ................................................................... 48
Maintenance ........................................................................................................................... 49
Maintenance schedule .......................................................................................................... 49
Bearing maintenance ............................................................................................................ 50
Bearing and oil requirements .............................................................................................. 50
Acceptable oil for lubricating bearings ................................................................................ 50
Lubricate the bearings with oil ............................................................................................ 50
Lubricating-grease requirements ........................................................................................ 52
Regrease the grease-lubricated bearings .......................................................................... 52
Remove the ball bearings ................................................................................................... 52
Remove the roller bearings ................................................................................................ 53
Mechanical-seal maintenance .............................................................................................. 53
Packed stuffing-box maintenance ......................................................................................... 54
Disassembly ......................................................................................................................... 55
Disassembly precautions ................................................................................................... 55
Drain the pump ................................................................................................................... 55
Remove the coupling guard ................................................................................................ 56
Remove the casing ............................................................................................................. 57
Bearing housing and bearings removal .............................................................................. 59
Disassemble the rotating element ...................................................................................... 66
Pre-assembly inspections ..................................................................................................... 67
Replacement guidelines ..................................................................................................... 67
Bearings inspection ............................................................................................................ 68
Shaft inspection .................................................................................................................. 68
Shaft replacement guidelines ............................................................................................. 69
Parting gasket inspection and replacement ........................................................................ 69
Replace the impeller wear rings ......................................................................................... 70
Reassembly .......................................................................................................................... 71
Install the impeller ............................................................................................................... 71
Bearing housing and bearings installation .......................................................................... 72
Install the rotating element ................................................................................................. 75

Table of Contents
Model 3420 Installation, Operation, and Maintenance Manual 3
Assembly references .......................................................................................................... 77
Troubleshooting .................................................................................................................... 96
Alignment troubleshooting .................................................................................................... 96
Operation troubleshooting ..................................................................................................... 96
Parts Listings and Cross-Sectionals ................................................................................... 98
SX and MX group parts list .................................................................................................... 98
M, M-modified, and 20x24-28 group parts list ....................................................................... 99
Standard group parts list (18x20-24) ................................................................................... 100
L group parts list .................................................................................................................. 101
LDS group parts list ............................................................................................................. 103
XL and XXL group parts list ................................................................................................. 104
Construction details ............................................................................................................ 106
Impeller description ............................................................................................................. 108
Cross-sectional drawings .................................................................................................... 110
Other Relevant Documentation or Manuals ...................................................................... 116

Introduction and Safety
Model 3420 Installation, Operation, and Maintenance Manual4
Introduction and Safety
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.
Requesting other information
Special versions can be supplied with supplementary instruction leaflets. See the sales
contract for any modifications or special version characteristics. For instructions, situations, or
events that are not considered in this manual or in the sales documents, please contact the
nearest ITT representative.
Always specify the exact product type and identification code when requesting technical
information or spare parts.

Introduction and Safety
Model 3420 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.
• 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.
• 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.
• 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.
• Never operate the pump with the suction valve closed.
• Precautions must be taken to prevent physical injury. The pump may handle hazardous
and/or toxic fluids. Proper personal protective equipment should be worn. Pumpage must
be handled and disposed of in conformance with applicable environmental regulations.
• 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.
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.
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.
NOTICE:
Save this manual for future reference and keep it readily available.
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

Introduction and Safety
Model 3420 Installation, Operation, and Maintenance Manual6
Hazard levels
Hazard level Indication
DANGER: A hazardous situation which, if not avoided, will
result in death or serious injury
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.

Introduction and Safety
Model 3420 Installation, Operation, and Maintenance Manual 7
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.
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.

Introduction and Safety
Model 3420 Installation, Operation, and Maintenance Manual8
• 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:
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.

Introduction and Safety
Model 3420 Installation, Operation, and Maintenance Manual 9
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).
Monitoring equipment
For additional safety, use condition-monitoring devices. Condition-monitoring devices include
but are not limited to these devices:
• Pressure gauges
• Flow meters
• Level indicators
• Motor load readings
• Temperature detectors
• Bearing monitors
• Leak detectors
• PumpSmart control system
• Filter
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 3420 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
Precautions
WARNING:
• Stay clear of suspended loads.
• Observe accident prevention regulations in force.
Lifting methods
WARNING:
• 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.
• Do not use lugs on the top half of the casing in order to lift the pump.
Pump mounting Lifting method
Bare pump Hitch a nylon sling, chain, or wire rope around both bearing housings.
Pump and base Support the pump with a sling under the two bearing housings and a
sling under the motor end of the baseplate.
Pump, base, and motor Attach slings to the baseplate lifting lugs. Use a spreader bar so that
the pump is not damaged.

Transportation and Storage
Model 3420 Installation, Operation, and Maintenance Manual 11
Bare pump
Pump and base
Pump, base, and motor
Storage guidelines
Pump storage requirements
Storage requirements depend on the amount of time that you store the unit. The normal
packaging is designed only to protect the unit during shipping.

Transportation and Storage
Model 3420 Installation, Operation, and Maintenance Manual12
Length of time in storage Storage requirements
Upon receipt/short-term (less than six months) • Store in a covered and dry location.
• Store the unit free from dirt and vibrations.
Long-term (more than six months) • Store in a covered and dry location.
• Store the unit free from heat, dirt, and vibra-
tions.
• Rotate the shaft by hand several times at least
every three months.
Treat bearing and machined surfaces so that they are well preserved. Refer to drive unit and
coupling manufacturers for their long-term storage procedures.
You can purchase long-term storage treatment with the initial unit order or you can purchase it
and apply it after the units are already in the field. Contact your local ITT sales representative.

Product Description
Model 3420 Installation, Operation, and Maintenance Manual 13
Product Description
General Description
Product description
Model 3420 is a horizontal, centrifugal pump with these characteristics:
• Single stage
• Double suction
• Enclosed impeller
Model 3420 uses English dimensions.
Casing • The casing is horizontally split. The upper and lower halves are held together with studs
and nuts or capscrews.
• The upper half has a vent connection, a priming connection, and one or two stuffing-box
seal ring connections.
• The lower half has two drain connections, suction and discharge gauge connections,
and stuffing-box overflow connections.
• Flanged suction and discharge connections are located in the lower half of the casing and
conform to ANSI 16.1/16.5 class 125/150.
• The casing is supported by integrally cast feet.
• Separate bearing housings are attached directly to machined fits in each end of the casing
with capscrews or machined fits that are secured with bearing caps, studs, and nuts.
• All sizes have:
• Dual volute casings in order to reduce radial loads on the shaft
• Two jacking screws
• Two lifting lugs for the upper half
• Two tapered dowel pins for alignment
• Non-asbestos parting gasket, 0.030 or 0.016 in. (0.75 or 0.41 mm)
Impeller • Enclosed, double-suction design for axial hydraulic balance
• Fully machined exterior surfaces
• Receives a one- or two-plane spin balance
• Keyed to the shaft and held in place with shaft sleeves and sleeve nuts
Wear rings • Casing and impeller wear rings maintain proper running clearances and minimize leaks
between the suction and discharge chambers in the casing.
• Casing rings are held in place with a machined hook lock.
• Impeller rings are held in place with axial setscrews.
Shaft • Maximum shaft deflection of 0.002 in. (0.051 mm) at the stuffing-box face under the worst
operating conditions
• Completely dry with O-ring seals between the impeller and shaft sleeves, and between the
shaft sleeves and the sleeve nuts
• Made from AISI 4340 steel with an option for 316 stainless steel

Product Description
Model 3420 Installation, Operation, and Maintenance Manual14
Shaft sleeves • Standard on all pumps
• Keyed to the shaft at the impeller
• Held in place with sleeve nuts, which tighten against rotation and are secured in place with
setscrews
Stuffing box • Non-asbestos packing
• Contains a PTFE™ split lantern ring and renewable stuffing box throat bushings
• Tapped openings for water sealing from either the pump casing or an outside source
• Bypass piping, optional
• Two-piece machined split glands
Pump group definitions
These pumps are configured in several different groups that are based on bearing configurations and
hydraulic sizes:
Group Type of bearings Type of lube Bearing
attachment Type of seals Hydraulic sizes
SX Ball radial and du-
plex ball thrust bear-
ings
Flood oil lube with
constant level oiler,
optional grease lube
Bearing housings
bolted to the casing Non-metallic laby- rinth seals 12x14-15
16x18-17H
MX Ball radial and du-
plex ball thrust bear-
ings
Flood oil lube with
constant level oiler,
optional grease lube
Bearing housings
bolted to the casing Non-metallic laby- rinth seals 18x20-20
M Ball radial and du-
plex ball thrust bear-
ings
Ring oil lube with
constant level oiler,
optional grease lube
Bearing housing se-
cured with tongue
and groove fits and
a bearing cap with
studs and nuts
Metallic labyrinth
seals 16x18-30
18x20-30
20x24-24
20x24-30
M (modified) (Same as M group except the shaft is longer in order to accommodate a wider
pump.) 20x24-28
— Ball radial and du-
plex ball thrust bear-
ings
Ring oil lube with
constant level oiler,
optional grease lube
Bearing housing se-
cured with tongue
and groove fits and
a bearing cap with
studs and nuts
Metallic labyrinth
seals 18x20-24
L Double row roller
bearings, both thrust
and radial
Ring oil lube with
constant level oiler,
optional grease lube
Bearing housing se-
cured with tongue
and groove fits and
a bearing cap with
studs and nuts
Metallic labyrinth
seals 24x30-32
LDS Double row roller
bearings, both thrust
and radial
Ring oil lube with
constant level oiler,
optional grease lube
Bearing housing se-
cured with tongue
and groove fits and
a bearing cap with
studs and nuts
Metallic labyrinth
seals 30x30-31
30x30-38
XL Double row roller
bearings, both thrust
and radial
Ring oil lube with
constant level oiler,
optional grease lube
Bearing housing se-
cured with tongue
and groove fits and
a bearing cap with
studs and nuts
Metallic labyrinth
seals 30x36-42
20x30-42
XXL Double row roller
bearings, both thrust
and radial
Ring oil lube with
constant level oiler,
optional grease lube
Bearing housing se-
cured with tongue
and groove fits and
a bearing cap with
studs and nuts
Metallic labyrinth
seals 36x42-52
Nameplate information
Important information for ordering
Every pump has nameplates that provide information about the pump. The nameplates are
located on the casing and the bearing frame.

Product Description
Model 3420 Installation, Operation, and Maintenance Manual 15
When you order spare parts, identify this pump information:
• Model
• Size
• Serial number
• Item numbers of the required parts
Refer to the nameplate on the pump casing for most of the information. See Parts List for item
numbers.
Nameplate types
Nameplate Description
Pump casing Provides information about the hydraulic characteristics of the pump.
The formula for the pump size is: Discharge x Suction - Nominal Maximum Impeller
Diameter in inches.
(Example: 2x3-8)
Bearing frame Provides information about the lubrication system used.
ATEX If applicable, your pump unit might have an ATEX nameplate affixed to the pump, the
baseplate, or the discharge head. The nameplate provides information about the
ATEX specifications of this pump.
IECEx If applicable, your pump unit might have the following IECEx nameplate affixed to the
pump and/or baseplate. The nameplate provides information about the IECEx
specifications of this pump.
Nameplate on the pump casing using English units
Nameplate field Explanation
STD. NO. ANSI standard designation
MAT'L. CONST. Material of which the pump is constructed
IMPLR. DIA. Impeller diameter, in inches
MAX. DIA. Maximum impeller diameter, in inches
MODEL Pump model
SIZE Size of the pump
GPM Rated pump flow, in gallons per minute
FT. HD. Rated pump head, in feet
RPM Rated pump speed, revolutions per minute
SER. NO. Serial number of the pump
MAX. DSGN. PSI @ 100F Maximum pressure at 100ºF according to the pump
design
Nameplate on the pump casing using metric units

Product Description
Model 3420 Installation, Operation, and Maintenance Manual16
Nameplate field Explanation
STD. NO. ANSI standard designation
MAT'L. CONST. Material of which the pump is constructed
IMPLR. DIA. Impeller diameter
MAX. DIA. Maximum impeller diameter
MODEL Pump model
SIZE Size of the pump
M3/HR Rated pump flow, in cubic meters per hour
M HD. Rated pump head, in meters
RPM Rated pump speed, revolutions per minute
SER. NO. Serial number of the pump
MAX. DSGN KG/CM2@ 20°C Maximum pressure at 20ºC according to the pump
design
Nameplate on the bearing frame
Table 1: Explanation of the nameplate on the bearing frame
Nameplate field Explanation
MOD. Pump model
SIZE Size of the pump
SER. NO. Serial number of the pump
LUBE Lubricant, oil or grease
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
Table 2: Temperature class definitions
Code Maximum permissible surface
temperature in °F (°C) Minimum permissible surface temperature in °F (°C)
T1 842 (450) 700 (372)
T2 572 (300) 530 (277)
T3 392 (200) 350 (177)
T4 275 (135) 235 (113)
T5 212 (100) Option not available
T6 185 (85) Option not available

Product Description
Model 3420 Installation, Operation, and Maintenance Manual 17
NOTICE: Make sure that the code classifications on the pump are compatible with the specific
environment in which you plan to install the equipment. If they are not compatible, do not
operate the equipment and contact your ITT representative before you proceed.

Installation
Model 3420 Installation, Operation, and Maintenance Manual18
Installation
Pre-installation
Precautions
WARNING:
• When installing in a potentially explosive environment, ensure that the motor is
properly certified.
• All equipment being installed must be properly grounded to prevent unexpected
discharge. Discharge can cause equipment damage, electric shock, and result in serious
injury. Test the ground lead to verify it is connected correctly.
NOTICE:
• Electrical connections must be made by certified electricians in compliance with all
international, national, state and local regulations.
• Supervision by an authorized ITT representative is recommended to ensure proper
installation. Improper installation may result in equipment damage or decreased perfor-
mance.
Pump location guidelines
Guideline Explanation/comment
Keep the pump as close to the liquid source as
practically possible. This minimizes the friction loss and keeps the suction piping as short as possible.
Make sure that the space around the pump is suffi-
cient. This facilitates ventilation, inspection, mainte- nance, and service.
If you require lifting equipment such as a hoist or
tackle, make sure that there is enough space above
the pump.
This makes it easier to properly use the lifting
equipment and safely remove and relocate the
components to a safe location.
Be sure to allow space for removing the upper half of
the casing and a crane or hoist. Refer to height requirements for removing the upper half of the casing. See Remove the casing
in the Maintenance chapter.
Protect the unit from weather and water damage due
to rain, flooding, and freezing temperatures.
If the possibility of freezing exists during a shutdown
period, then drain the pump completely and use
compressed air to blow out all passages and pockets
where liquid might collect.
This is applicable if nothing else is specified.
Do not install and operate the equipment in closed
systems unless the system is constructed with proper-
ly-sized safety devices and control devices.
Acceptable devices:
• Pressure relief valves
• Compression tanks
• Pressure controls
• Temperature controls
• Flow controls
If the system does not include these devices,
consult the engineer or architect in charge before
you operate the pump.
Take into consideration the occurrence of unwanted
noise and vibration. The best pump location for noise and vibration absorption is on a concrete floor with subsoil
underneath.
Make sure there is a suitable power source available
for the pump driver. If the pump is motor-driven, then the electrical characteristics of the power source should be
identical to those shown on motor data plate.