Flowserve CPX, CPXR, CPXN, CPXP, IDP CPX User Instructions

USER INSTRUCTIONS

CPX, CPXR, CPXN and CPXP

Installation

Operation

Single stage, end suction, centrifugal, chemical process
pumps

PCN=71569117 02-10 (E) (Based on C937KH013, C937KH054,
C961KH001 and C937KH067.) Original instructions.

Maintenance

These instructions must be read prior to installing,

operating, using and maintaining this equipment.

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

CONTENTS

Page

1 INTRODUCTION AND SAFETY............................ 4

1.1 General ...........................................................4

1.2 CE marking and approvals..............................4

1.3 Disclaimer .......................................................4

1.4 Copyright.........................................................4

1.5 Duty conditions................................................ 4

1.6 Safety..............................................................5

1.7 Nameplate and safety labels...........................8

1.8 Specific machine performance........................9

1.9 Noise level.......................................................9

2 TRANSPORT AND STORAGE............................10

2.1 Consignment receipt and unpacking.............10

2.2 Handling........................................................10

2.3 Lifting.............................................................10

2.4 Storage..........................................................10

2.5 Recycling and end of product life..................10

3 DESCRIPTION .................................................... 11

3.1 Configurations............................................... 11

3.2 Name nomenclature...................................... 11

3.3 Design of major parts.................................... 11

3.4 Performance and operating limits................. 11

4 INSTALLATION....................................................12

4.1 Location.........................................................12

4.2 Part assemblies.............................................12

4.3 Foundation ....................................................12

4.4 Grouting ........................................................12

4.5 Initial alignment .............................................12

4.6 Piping ............................................................13

4.7 Final shaft alignment check ..........................15

4.8 Electrical connections ...................................15

4.9 Protection systems........................................16

6 MAINTENANCE ...................................................21

6.1 General..........................................................21

6.2 Maintenance schedule...................................22

6.3 Spare parts.....................................................22

6.4 Recommended spares...................................23

6.5 Tools required ................................................23

6.6 Fastener torques............................................23

6.7 Setting impeller clearance .............................23

6.8 Disassembly ..................................................24

6.9 Examination of parts......................................25

6.10 Assembly .....................................................26

6.11 Sealing arrangements..................................28

7 FAULTS; CAUSES AND REMEDIES...................31

8 PARTS LISTS AND DRAWINGS .........................33

8.1 CPX and CPXN .............................................33

8.2 CPXR.............................................................35

8.3 CPXP.............................................................36

8.4 CPX, CPXR, CPXN and CPXP

9 CERTIFICATION..................................................41

10 OTHER RELEVANT DOCUMENTATION

additional details..........................................38

8.5 Parts interchangeability .................................39

8.6 General arrangement drawing.......................40

AND MANUALS................................................41

10.1 Supplementary User Instruction manuals....41

10.2 Change notes ..............................................41

10.3 Additional sources of information.................41

Page

5 COMMISSIONING, START-UP, OPERATION

AND SHUTDOWN ...........................................16

5.1 Pre-commissioning procedure...................... 16

5.2 Pump lubricants ............................................17

5.3 Open impeller clearance...............................18

5.4 Direction of rotation.......................................18

5.5 Guarding .......................................................18

5.6 Priming and auxiliary supplies ...................... 18

5.7 Starting the pump..........................................19

5.8 Running the pump.........................................19

5.9 Stopping and shutdown................................. 20

5.10 Hydraulic, mechanical and electrical duty...20

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CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

INDEX

Page

Additional sources (10.3).........................................41

Alignment of shafting (see 4.3, 4.5 and 4.7)

Assembly (6.10).......................................................26

ATEX marking (1.6.4.2) .............................................7

Bearing sizes and capacities (5.2.2)........................17

CE marking and approvals (1.2)................................4

Certification (9) ........................................................41

Change notes (10.2)................................................41

Clearances, impeller (6.7) .......................................23

Commissioning and operation (5)............................16

Compliance, ATEX (1.6.4.1)......................................7

Configurations (3.1) .................................................11

Copyright (1.4)...........................................................4

Design of major parts (3.3)......................................11

Direction of rotation (5.4) .........................................18

Disassembly (6.8)....................................................24

Disclaimer (1.3).......................................................... 4

Dismantling (6.8, Disassembly)...............................24

Drawings (8) ............................................................33

Duty conditions (1.5)..................................................4

Electrical connections (4.8) .....................................15

End of product life (2.5) ........................................... 10

Examination of parts (6.9) .......................................25

Fastener torques (6.6) .............................................23

Faults; causes and remedies (7)............................. 31

Foundation (4.3) ...................................................... 12

General arrangement drawing (8.6) ........................ 40

General assembly drawings (8)...............................33

Grouting (4.4)........................................................... 12

Guarding (5.5).......................................................... 18

Handling (2.2) ..........................................................10

Hydraulic, mechanical and electrical duty (5.10).....20

Impeller clearance (see 5.3 and 6.7)

Inspection (6.2.1 and 6.2.2).....................................22

Installation (4) ..........................................................12

Lifting (2.3)...............................................................10

Location (4.1)...........................................................12

Lubrication (see 5.1.1, 5.2 and 6.2.3)

Lubrication schedule (5.2.5).................................... 17

Maintenance (6).......................................................21

Maintenance schedule (6.2).................................... 22

Name nomenclature (3.2)........................................11

Nameplate (1.7.1)......................................................8

Operating limits (3.4.1) ............................................ 11

Ordering spare parts (6.3.1).................................... 22

Part assemblies (4.2)...............................................12

Parts interchangeability (8.5)...................................39

Parts lists (8)............................................................33

Performance (3.4)....................................................11

Piping (4.6) ..............................................................13

Pre-commissioning (5.1)..........................................16

Priming and auxiliary supplies (5.6).........................18

Protection systems (4.9)..........................................16

Page

Reassembly (6.10, Assembly) .................................26

Receipt and unpacking (2.1)....................................10

Recommended fill quantities (see 5.2.2)..................17

Recommended grease lubricants (5.2.3).................17

Recommended oil lubricants (5.2.1) ........................17

Recommended spares (6.4).....................................23

Recycling (2.5) .........................................................10

Replacement parts (6.3 and 6.4).........................22/23

Running the pump (5.8) ...........................................19

Safety action (1.6.3) ...................................................5

Safety labels (1.7.2) ...................................................8

Safety markings (1.6.1) ..............................................5

Safety, protection systems (see 1.6 and 4.9)

Sealing arrangements (6.11)....................................28

Sectional drawings (8)..............................................33

Setting impeller clearance (6.7) ...............................23

Sound pressure level (1.9, Noise level) .....................9

Sources, additional information (10.3) .....................41

Spare parts (6.3) ......................................................22

Specific machine performance (1.8) ..........................9

Starting the pump (5.7).............................................19

Stop/start frequency (5.8.5)......................................20

Stopping and shutdown (5.9)...................................20

Storage, pump (2.4) .................................................10

Storage, spare parts (6.3.2) .....................................23

Supplementary manuals or information sources......41

Supplementary User Instructions (10.1)...................41

Thermal expansion (4.5.1) .......................................12

Tools required (6.5)..................................................23

Torques for fasteners (6.6).......................................23

Trouble-shooting (see 7) ..........................................31

Vibration (5.8.4)........................................................20

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CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

1 INTRODUCTION AND SAFETY

1.1 General

These instructions must always be kept

close to the product's operating location or
directly with the product.

Flowserve products are designed, developed and
manufactured with state-of-the-art technologies in
modern facilities. The unit is produced with great
care and commitment to continuous quality control,
utilising sophisticated quality techniques and safety
requirements.

Flowserve is committed to continuous quality
improvement and being at service for any further
information about the product in its installation and
operation or about its support products, repair and
diagnostic services.

These instructions are intended to facilitate
familiarization with the product and its permitted use.
Operating the product in compliance with these
instructions is important to help ensure reliability in
service and avoid risks. The instructions may not
take into account local regulations; ensure such
regulations are observed by all, including those
installing the product. Always coordinate repair
activity with operations personnel, and follow all plant
safety requirements and applicable safety and health
laws and regulations.

These instructions must be read prior to
installing, operating, using and maintaining the
equipment in any region worldwide. The
equipment must not be put into service until all
the conditions relating to safety, noted in the
instructions, have been met. Failure to follow and
apply the present user instructions is considered
to be misuse. Personal injury, product damage,
delay or failure caused by misuse are not covered
by the Flowserve warranty.

1.2 CE marking and approvals

It is a legal requirement that machinery and equipment
put into service within certain regions of the world shall
conform with the applicable CE Marking Directives
covering Machinery and, where applicable, Low Voltage
Equipment, Electromagnetic Compatibility (EMC),
Pressure Equipment Directive (PED) and Equipment for
Potentially Explosive Atmospheres (ATEX).

Where applicable, the Directives and any additional
Approvals, cover important safety aspects relating to
machinery and equipment and the satisfactory provision
of technical documents and safety instructions. Where
applicable this document incorporates information
relevant to these Directives and Approvals.

To confirm the Approvals applying and if the product is
CE marked, check the serial number plate markings
and the Certification. (See section 9, Certification.)

1.3 Disclaimer

Information in these User Instructions is believed
to be reliable. In spite of all the efforts of
Flowserve Corporation to provide sound and all
necessary information the content of this manual
may appear insufficient and is not guaranteed by
Flowserve as to its completeness or accuracy.

Flowserve manufactures products to exacting
International Quality Management System Standards
as certified and audited by external Quality
Assurance organisations. Genuine parts and
accessories have been designed, tested and
incorporated into the products to help ensure their
continued product quality and performance in use.
As Flowserve cannot test parts and accessories
sourced from other vendors the incorrect
incorporation of such parts and accessories may
adversely affect the performance and safety features
of the products. The failure to properly select, install
or use authorised Flowserve parts and accessories is
considered to be misuse. Damage or failure caused
by misuse is not covered by the Flowserve warranty.
In addition, any modification of Flowserve products or
removal of original components may impair the safety
of these products in their use.

1.4 Copyright

All rights reserved. No part of these instructions may
be reproduced, stored in a retrieval system or
transmitted in any form or by any means without prior
permission of Flowserve Pump Division.

1.5 Duty conditions

This product has been selected to meet the
specifications of your purchaser order. The
acknowledgement of these conditions has been sent
separately to the Purchaser. A copy should be kept
with these instructions.

The product must not be operated beyond

the parameters specified for the application.
If there is any doubt as to the suitability of the
product for the application intended, contact
Flowserve for advice, quoting the serial number.

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CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

If the conditions of service on your purchase order are
going to be changed (for example liquid pumped,
temperature or duty) it is requested that the user seeks
the written agreement of Flowserve before start up.

1.6 Safety

1.6.1 Summary of safety markings

These User Instructions contain specific safety
markings where non-observance of an instruction would
cause hazards. The specific safety markings are:

This symbol indicates electrical safety
instructions where non-compliance will involve a high
risk to personal safety or the loss of life.

This symbol indicates safety instructions where
non-compliance would affect personal safety and could
result in loss of life.

This symbol indicates “hazardous and toxic fluid”
safety instructions where non-compliance would affect
personal safety and could result in loss of life.

This symbol indicates safety instructions
where non-compliance will involve some risk to safe
operation and personal safety and would damage the
equipment or property.

This symbol indicates explosive atmosphere zone
marking according to ATEX. It is used in safety
instructions where non-compliance in the hazardous
area would cause the risk of an explosion.

This symbol is used in safety instructions to
remind not to rub non-metallic surfaces with a dry
cloth; ensure the cloth is damp. It is used in safety
instructions where non-compliance in the hazardous
area would cause the risk of an explosion.

This sign is not a safety symbol but indicates

an important instruction in the assembly process.

1.6.2 Personnel qualification and training

All personnel involved in the operation, installation,
inspection and maintenance of the unit must be
qualified to carry out the work involved. If the personnel
in question do not already possess the necessary
knowledge and skill, appropriate training and instruction
must be provided. If required the operator may
commission the manufacturer/supplier to provide
applicable training.

Always coordinate repair activity with operations and
health and safety personnel, and follow all plant
safety requirements and applicable safety and health
laws and regulations.

1.6.3 Safety action

This is a summary of conditions and actions to help
prevent injury to personnel and damage to the
environment and to equipment. For products used
in potentially explosive atmospheres section 1.6.4
also applies.

NEVER DO MAINTENANCE WORK

WHEN THE UNIT IS CONNECTED TO POWER

GUARDS MUST NOT BE REMOVED WHILE

THE PUMP IS OPERATIONAL

DRAIN THE PUMP AND ISOLATE PIPEWORK
BEFORE DISMANTLING THE PUMP
The appropriate safety precautions should be taken
where the pumped liquids are hazardous.

FLUORO-ELASTOMERS (When fitted.)
When a pump has experienced temperatures over
250 ºC (482 ºF), partial decomposition of fluoro­elastomers (example: Viton) will occur. In this
condition these are extremely dangerous and skin
contact must be avoided.

HANDLING COMPONENTS
Many precision parts have sharp corners and the
wearing of appropriate safety gloves and equipment
is required when handling these components. To lift
heavy pieces above 25 kg (55 lb) use a crane
appropriate for the mass and in accordance with
current local regulations.

THERMAL SHOCK
Rapid changes in the temperature of the liquid within
the pump can cause thermal shock, which can result
in damage or breakage of components and should be
avoided.

NEVER APPLY HEAT TO REMOVE IMPELLER
Trapped lubricant or vapour could cause an explosion.

HOT (and cold) PARTS
If hot or freezing components or auxiliary heating
supplies can present a danger to operators and
persons entering the immediate area action must be
taken to avoid accidental contact. If complete
protection is not possible, the machine access must
be limited to maintenance staff only, with clear visual
warnings and indicators to those entering the
immediate area. Note: bearing housings must not be
insulated and drive motors and bearings may be hot.

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CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

If the temperature is greater than 80 ºC (175 ºF) or
below -5 ºC (23 ºF) in a restricted zone, or exceeds
local regulations, action as above shall be taken.

HAZARDOUS LIQUIDS
When the pump is handling hazardous liquids care
must be taken to avoid exposure to the liquid by
appropriate siting of the pump, limiting personnel
access and by operator training. If the liquid is
flammable and or explosive, strict safety procedures
must be applied.

Gland packing must not be used when pumping
hazardous liquids.

PREVENT EXCESSIVE EXTERNAL
PIPE LOAD
Do not use pump as a support for piping. Do not mount
expansion joints, unless allowed by Flowserve in writing,
so that their force, due to internal pressure, acts on the
pump flange.

NEVER RUN THE PUMP DRY

ENSURE CORRECT LUBRICATION
(See section 5, Commissioning, startup, operation and
shutdown.)

ONLY CHECK DIRECTION OF
MOTOR ROTATION WITH COUPLING ELEMENT/
PINS REMOVED
Starting in reverse direction of rotation will damage the
pump.

START THE PUMP WITH OUTLET
VALVE PART OPENED
(Unless otherwise instructed at a specific point in the
User Instructions.)
This is recommended to minimize the risk of
overloading and damaging the pump or motor at full or
zero flow. Pumps may be started with the valve further
open only on installations where this situation cannot
occur. The pump outlet control valve may need to be
adjusted to comply with the duty following the run-up
process. (See section 5, Commissioning start-up,
operation and shutdown.)

INLET VALVES TO BE FULLY OPEN
WHEN PUMP IS RUNNING
Running the pump at zero flow or below the
recommended minimum flow continuously will cause
damage to the pump and mechanical seal.

ABNORMALLY HIGH OR LOW FLOW RATES
Operating at a flow rate higher than normal or at a flow
rate with no back pressure on the pump may overload
the motor and cause cavitation. Low flow rates may
cause a reduction in pump/bearing life, overheating of
the pump, instability and cavitation/vibration.

1.6.4 Products used in potentially explosive
atmospheres

Measures are required to:

• Avoid excess temperature

• Prevent build up of explosive mixtures

• Prevent the generation of sparks

• Prevent leakages

• Maintain the pump to avoid hazard

The following instructions for pumps and pump units
when installed in potentially explosive atmospheres
must be followed to help ensure explosion protection.
For ATEX, both electrical and non-electrical equipment
must meet the requirements of European Directive
94/9/EC. Always observe the regional legal Ex
requirements eg Ex electrical items outside the EU may
be required certified to other than ATEX eg IECEx, UL.

1.6.4.1 Scope of compliance

Use equipment only in the zone for which it is
appropriate. Always check that the driver, drive
coupling assembly, seal and pump equipment are
suitably rated and/or certified for the classification of the
specific atmosphere in which they are to be installed.

Where Flowserve has supplied only the bare shaft
pump, the Ex rating applies only to the pump. The
party responsible for assembling the ATEX pump set
shall select the coupling, driver and any additional
equipment, with the necessary CE Certificate/
Declaration of Conformity establishing it is suitable for
the area in which it is to be installed.

The output from a variable frequency drive (VFD) can
cause additional heating effects in the motor and so,
for pumps sets with a VFD, the ATEX Certification for
the motor must state that it is covers the situation
where electrical supply is from the VFD. This
particular requirement still applies even if the VFD is
in a safe area.

DO NOT RUN THE PUMP AT

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CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

Temperature

1.6.4.2 Marking

An example of ATEX equipment marking is shown
below. The actual classification of the pump will be
engraved on the nameplate.

II 2 GD c IIC 135 ºC (T4)

Equipment Group
I = Mining
II = Non-mining

Category
2 or M2 = high level protection
3 = normal level of protection

Gas and/or dust
G = Gas
D = Dust

c = Constructional safety

(in accordance with EN13463-5)

Gas Group (Equipment Category 2 only)
IIA – Propane (typical)
IIB – Ethylene (typical)
IIC – Hydrogen (typical)

Maximum surface temperature (Temperature Class)
(see section 1.6.4.3.)

1.6.4.3 Avoiding excessive surface temperatures

ENSURE THE EQUIPMENT TEMPERATURE

CLASS IS SUITABLE FOR THE HAZARD ZONE
Pumps have a temperature class as stated in the

ATEX Ex rating on the nameplate. These are based
on a maximum ambient of 40 ºC (104 ºF); refer to
Flowserve for higher ambient temperatures.

The surface temperature on the pump is influenced
by the temperature of the liquid handled. The
maximum permissible liquid temperature depends on
the ATEX temperature class and must not exceed the
values in the table that follows.

to EN13463-1

class

T6
T5
T4
T3
T2
T1

*The table only takes the ATEX temperature class into consideration. Pump
design or material, as well as component design or material, may further
limit the maximum working temperature of the liquid.

Maximum surface

temperature permitted

85 °C (185 °F)
100 °C (212 °F)
135 °C (275 °F)
200 °C (392 °F)
300 °C (572 °F)
450 °C (842 °F)

Temperature limit of

liquid handled

Consult Flowserve
Consult Flowserve

115 °C (239 °F) *
180 °C (356 °F) *
275 °C (527 °F) *
400 °C (752 °F) *

The temperature rise at the seals and bearings and
due to the minimum permitted flow rate is taken into
account in the temperatures stated.

The responsibility for compliance with the
specified maximum liquid temperature is with the
plant operator.

Temperature classification “Tx” is used when the liquid
temperature varies and when the pump is required to be
used in differently classified potentially explosive
atmospheres. In this case the user is responsible for
ensuring that the pump surface temperature does not
exceed that permitted in its actual installed location.

Avoid mechanical, hydraulic or electrical overload by
using motor overload trips, temperature monitors or a
power monitor and make routine vibration monitoring
checks.

In dirty or dusty environments, make regular checks
and remove dirt from areas around close clearances,
bearing housings and motors.

Where there is any risk of the pump being run against a
closed valve generating high liquid and casing external
surface temperatures fit an external surface
temperature protection device.

Pumps with threaded on impellers only

Do not attempt to check the direction of rotation with the
coupling element/pins fitted due to the risk of severe
contact between rotating and stationary components.

Pumps with key drive impellers only

If an explosive atmosphere exists during the
installation, do not attempt to check the direction of
rotation by starting the pump unfilled. Even a short
run time may give a high temperature resulting from
contact between rotating and stationary components.

Additional requirements for CPXP pumps only

Where the system operation does not ensure control of
priming, as defined in these User Instructions, and the
maximum permitted surface temperature of the T Class
could be exceeded, fit an external surface temperature
protection device.

1.6.4.4 Preventing the build up of explosive
mixtures

ENSURE THE PUMP IS PROPERLY FILLED

AND VENTED AND DOES NOT RUN DRY
Ensure the pump and relevant suction and discharge

pipeline system is totally filled with liquid at all times
during the pump operation, so that an explosive
atmosphere is prevented.

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CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

In addition it is essential to make sure that seal
chambers, auxiliary shaft seal systems and any
heating and cooling systems are properly filled.

If the operation of the system cannot avoid this
condition, fit an appropriate dry run protection device
(for example liquid detection or a power monitor).

To avoid potential hazards from fugitive emissions of
vapour or gas to atmosphere the surrounding area
must be well ventilated.

1.6.4.5 Preventing sparks

To prevent a potential hazard from mechanical

contact, the coupling guard must be non-sparking.
To avoid the potential hazard from random induced

current generating a spark, the baseplate must be
properly grounded.

Avoid electrostatic charge: do not rub non-metallic

surfaces with a dry cloth; ensure cloth is damp.
For ATEX the coupling must be selected to comply

with 94/9/EC. Correct coupling alignment must be
maintained.

Additional requirement for metallic pumps on
non-metallic baseplates

When metallic components are fitted on a non­metallic baseplate they must be individually earthed.

1.6.4.6 Preventing leakage

The pump must only be used to handle liquids
for which it has been approved to have the correct
corrosion resistance.

Avoid entrapment of liquid in the pump and associated
piping due to closing of suction and discharge valves,
which could cause dangerous excessive pressures to
occur if there is heat input to the liquid. This can occur if
the pump is stationary or running.

Bursting of liquid containing parts due to freezing
must be avoided by draining or protecting the pump
and ancillary systems.

Where there is the potential hazard of a loss of a seal
barrier fluid or external flush, the fluid must be monitored.

If leakage of liquid to atmosphere can result in a
hazard, install a liquid detection .

1.6.4.7 Maintenance to avoid the hazard

CORRECT MAINTENANCE IS REQUIRED TO
AVOID POTENTIAL HAZARDS WHICH GIVE A
RISK OF EXPLOSION

The responsibility for compliance with maintenance
instructions is with the plant operator.

To avoid potential explosion hazards during
maintenance, the tools, cleaning and painting
materials used must not give rise to sparking or
adversely affect the ambient conditions. Where there
is a risk from such tools or materials, maintenance
must be conducted in a safe area.

It is recommended that a maintenance plan and
schedule is adopted. (See section 6, Maintenance.)

1.7 Nameplate and safety labels

1.7.1 Nameplate

For details of nameplate, see the Declaration of
Conformity, or separate documentation included with

these User Instructions.

1.7.2 Safety labels

Oil lubricated units only:

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CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

1.8 Specific machine performance

For performance parameters see section 1.5, Duty
conditions. Where performance data has been supplied

separately to the purchaser these should be obtained
and retained with these User Instructions.

1.9 Noise level

Attention must be given to the exposure of personnel
to the noise, and local legislation will define when
guidance to personnel on noise limitation is required,
and when noise exposure reduction is mandatory.
This is typically 80 to 85 dBA.

The usual approach is to control the exposure time to
the noise or to enclose the machine to reduce emitted
sound. You may have already specified a limiting
noise level when the equipment was ordered,
however if no noise requirements were defined, then
attention is drawn to the following table to give an
indication of equipment noise level so that you can
take the appropriate action in your plant.

Pump noise level is dependent on a number of
operational factors, flow rate, pipework design and
acoustic characteristics of the building, and so the

values given are subject to a 3 dBA tolerance and
cannot be guaranteed.

Similarly the motor noise assumed in the “pump and
motor” noise is that typically expected from standard
and high efficiency motors when on load directly driving
the pump. Note that a motor driven by an inverter may
show an increased noise at some speeds.

If a pump unit only has been purchased for fitting with
your own driver then the “pump only” noise levels in the
table should be combined with the level for the driver
obtained from the supplier. Consult Flowserve or a
noise specialist if assistance is required in combining
the values.

It is recommended that where exposure approaches
the prescribed limit, then site noise measurements
should be made.

The values are in sound pressure level LpA at 1 m
(3.3 ft) from the machine, for “free field conditions
over a reflecting plane”.

For estimating sound power level LWA (re 1 pW) then
add 14 dBA to the sound pressure value.

Motor size
and speed

kW (hp)

<0.55(<0.75) 72 72 64 65 62 64 62 64

0.75 (1) 72 72 64 66 62 64 62 64

1.1 (1.5) 74 74 66 67 64 64 62 63

1.5 (2) 74 74 66 71 64 64 62 63

2.2 (3) 75 76 68 72 65 66 63 64
3 (4) 75 76 70 73 65 66 63 64
4 (5) 75 76 71 73 65 66 63 64

5.5 (7.5) 76 77 72 75 66 67 64 65

7.5 (10) 76 77 72 75 66 67 64 65
11(15) 80 81 76 78 70 71 68 69

15 (20) 80 81 76 78 70 71 68 69

18.5 (25) 81 81 77 78 71 71 69 71
22 (30) 81 81 77 79 71 71 69 71
30 (40) 83 83 79 81 73 73 71 73
37 (50) 83 83 79 81 73 73 71 73
45 (60) 86 86 82 84 76 76 74 76
55 (75) 86 86 82 84 76 76 74 76

75 (100) 87 87 83 85 77 77 75 77

90 (120) 87 88 83 85 77 78 75 78
110 (150) 89 90 85 87 79 80 77 80
150 (200) 89 90 85 87 79 80 77 80
200 (270)
300 (400) – 87

1

The noise level of machines in this range will most likely be of values which require noise exposure control, but typical values are inappropriate.

Note: for 1 180 and 960 r/min reduce 1 450 r/min values by 2 dBA. For 880 and 720 r/min reduce 1 450 r/min values by 3 dBA.

3 550 r/min 2 900 r/min 1 750 r/min 1 450 r/min

Pump

only

1 1

Pump and

Typical sound pressure level LpA at 1 m reference 20 µPa, dBA

motor

Pump

only

1

Pump and

motor

1

Pump

only

85

Pump and

motor

87 83
90 85

Pump

only

Pump and

motor

85
86

Page 9 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

2 TRANSPORT AND STORAGE

2.1 Consignment receipt and unpacking

Immediately after receipt of the equipment it must be
checked against the delivery/shipping documents for
its completeness and that there has been no damage
in transportation. Any shortage and/or damage must
be reported immediately to Flowserve Pump Division
and must be received in writing within one month of
receipt of the equipment. Later claims cannot be
accepted.

Check any crate, boxes or wrappings for any
accessories or spare parts that may be packed
separately with the equipment or attached to side
walls of the box or equipment.

Each product has a unique serial number. Check
that this number corresponds with that advised and
always quote this number in correspondence as well
as when ordering spare parts or further accessories.

2.2 Handling

Boxes, crates, pallets or cartons may be unloaded
using fork lift vehicles or slings dependent on their
size and construction.

2.3 Lifting

A crane must be used for all pump sets in
excess of 25 kg (55 lb). Fully trained personnel must
carry out lifting, in accordance with local regulations.

The pump and cast iron baseplate set should be lifted
as shown:

Where the baseplate is folded steel there are no
specific lifting points provided for this complete
machine set (unless so identified). Any lifting points
that can be seen are provided only for dismantling
parts for servicing. Slings, ropes and other lifting
gear should be positioned where they cannot slip and
where a balanced lift is obtained.

Before lifting the driver alone, refer to the
manufacturer’s instructions.

2.4 Storage

Store the pump in a clean, dry location
away from vibration. Leave piping connection covers
in place to keep dirt and other foreign material out of
pump casing. Turn pump at intervals to prevent
brinelling of the bearings and the seal faces, if fitted,
from sticking.

The pump may be stored as above for up to 6
months. Consult Flowserve for preservative actions
when a longer storage period is needed.

2.5 Recycling and end of product life

At the end of the service life of the product or its
parts, the relevant materials and parts should be
recycled or disposed of using an environmentally
acceptable method and local requirements. If the
product contains substances that are harmful to the
environment, these should be removed and disposed
of in accordance with current regulations. This also
includes the liquids and/or gases that may be used in
the "seal system" or other utilities.

Make sure that hazardous substances are
disposed of safely and that the correct personal
protective equipment is used. The safety
specifications must be in accordance with the current
regulations at all times.

Page 10 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

3 DESCRIPTION

3.1 Configurations

The pump is a modular designed centrifugal pump
that can be built to achieve almost all chemical liquid
pumping requirements. (See 3.2 and 3.3 below.)

3.2 Name nomenclature

The pump size will be engraved on the nameplate
typically as below:

80-50CPX200

Nominal suction size in mm
Nominal discharge size in mm
Configuration – see 3.3.1 and 3.3.2 below
Nominal ISO 2858 maximum impeller diameter
The typical nomenclature above is the general guide

to the CPX configuration description. Identify the
actual pump size and serial number from the pump
nameplate. Check that this agrees with the
applicable certification provided.

3.3 Design of major parts

3.3.1 Pump casing

The pump casing is designed with a horizontal
centreline end inlet and a vertical centreline top outlet
which makes it self venting.

In addition, the CPXP pump casing is designed with a
self priming action which works on the reflux principle
for suction lifts up to 7 m (23 ft).

For ease of maintenance, the pump is constructed so
that pipe connectors do not have to be disturbed
when internal maintenance is required.

On the CPX, CPXR and CPXP the casing feet pads
are underneath the casing. On the CPXN they are on
the shaft centreline.

3.3.2 Impeller

An open impeller is fitted. (On the CPXR the impeller
is recessed into the back of the casing.)

3.3.3 Shaft

The large diameter stiff shaft, mounted on bearings,
has a keyed drive end.

3.3.4 Bearing housing

The bearing housing enables adjustment of impeller
face clearance via the bearing carrier jacking screws.

3.3.5 Pump bearings and lubrication

The pump is fitted with ball and or roller type bearings
which may be configured differently dependent on
use. The bearings may be oil or grease lubricated.

3.3.6 Cover

The cover has spigots between the pump casing and
bearing housing for optimum concentricity.

A fully confined gasket forms the seal between the
pump casing and the cover.

The covers designs provide improved performance of
mechanical seals.

The design enables one of a number of sealing
options to be fitted.

3.3.7 Shaft seal

The mechanical seal(s) attached to the drive shaft
seals the pumped liquid from the environment. Gland
packing may be fitted as an option on the CPX, CPXR
and CPXN.

3.3.8 Driver

The driver is normally an electric motor. Different drive
configurations may be fitted such as internal combustion
engines, turbines, hydraulic motors etc driving via
couplings, belts, gearboxes, drive shafts etc.

3.3.9 Accessories

Accessories may be fitted when specified by the
customer.

Fan cooling is available for high temperature operation.
(This is a fan fitted within the coupling guard to blow
cooling air over the bearing housing and shaft.)

3.4 Performance and operating limits

This product has been selected to meet the
specifications of the purchase order. See section 1.5.

The following data is included as additional
information to help with your installation. It is typical,
and factors such as temperature, materials, and seal
type may influence this data. If required, a definitive
statement for your particular application can be
obtained from Flowserve.

3.4.1 Operating limits

Normal maximum ambient temp. +40 ºC (104 ºF).
Maximum pump speed: refer to the nameplate.

Page 11 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

4 INSTALLATION

Equipment operated in hazardous locations
must comply with the relevant explosion protection
regulations. See section 1.6.4, Products used in

potentially explosive atmospheres.

4.1 Location

The pump should be located to allow room for access,
ventilation, maintenance and inspection with ample
headroom for lifting and should be as close as
practicable to the supply of liquid to be pumped. Refer
to the general arrangement drawing for the pump set.

4.2 Part assemblies

On baseplated pump sets the coupling elements are
supplied loose. It is the responsibility of the installer
to ensure that the pump set is finally lined up as
detailed in section 4.5.2, Alignment methods.

4.3 Foundation

There are many methods of installing
pump units to their foundations. The correct method
depends on the size of the pump unit, its location and
noise and vibration limitations. Non-compliance with
the provision of correct foundation and installation
may lead to failure of the pump and, as such, would
be outside the terms of the warranty.

Ensure the following are met:
a) The baseplate should be mounted onto a firm

foundation, either an appropriate thickness of
quality concrete or sturdy steel framework. (It
should NOT be distorted or pulled down onto the
surface of the foundation, but should be
supported to maintain the original alignment.)

b) Install the baseplate onto packing pieces evenly

spaced and adjacent to foundation bolts.

c) Level with shims between baseplate and packing

pieces.

d) The pump and driver have been aligned before

dispatch however the alignment of pump and motor
half coupling must be checked. If this is incorrect, it
indicates that the baseplate has become twisted
and should be corrected by re-shimming.

e) If not supplied, guarding shall be fitted as necessary

to meet the requirements of ISO 12100 and EN953.

4.4 Grouting

Where applicable, grout in the foundation bolts.
After adding pipework connections and rechecking the

coupling alignment, the baseplate should then be
grouted in accordance with good engineering practice.
If in any doubt, please contact your nearest service
centre for advice.

Grouting provides solid contact between the pump unit
and foundation, prevents lateral movement of vibrating
equipment and dampens resonant vibrations.

Foundation bolts should only be fully tightened when
the grout has cured.

4.5 Initial alignment

4.5.1 Thermal expansion

The pump and motor will normally
have to be aligned at ambient temperature with an
allowance for thermal expansion at operating
temperature. In pump installations involving high
liquid temperatures, the unit should be run at the
actual operating temperature, shut down and the
alignment checked immediately.

4.5.2 Alignment methods

Pump and driver must be isolated

electrically and the half couplings disconnected.

The alignment MUST be checked.
Although the pump will have been aligned at the factory

it is most likely that this alignment will have been
disturbed during transportation or handling. If
necessary, align the motor to the pump, not the pump to
the motor.

Alignment is achieved by adding or removing shims
under the motor feet and also moving the motor
horizontally as required. In some cases where the
alignment cannot be achieved it will be necessary to
move the pump before recommencing the above
procedure.

For couplings with narrow flanges use a dial indicator
as shown. The alignment values are maximums for
continuous service.

Page 12 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

Parallel

Angular

Permissible misalignment limits at working temperature:

• Parallel alignment

- 0.25 mm (0.010 in.) TIR maximum

• Angular alignment

- 0.3 mm (0.012 in.) TIR maximum for couplings
not exceeding 100 mm (4 in.) flange diameter

- 0.5 mm (0.020 in.) TIR maximum for couplings
over 100 mm (4 in.) diameter

When checking parallel alignment, the total indicator
read-out (TIR) shown is twice the value of the actual
shaft displacement.

Align in the vertical plane first, then horizontally by
moving motor. Maximum pump reliability is obtained by
near perfect alignment of 0.05 - 0.075 mm (0.002 -

0.003 in.) parallel and 0.05 mm (0.002 in.) per 100 mm
(4 in.) of coupling flange diameter as angular
misalignment.

4.5.3 Check for soft foot

Complete piping as below and see sections 4.7,
Final shaft alignment check up to and including section
5, Commissioning, startup, operation and shutdown,
before connecting driver and checking actual rotation.

4.6 Piping

Protective covers are fitted to the pipe
connections to prevent foreign bodies entering during
transportation and installation. Ensure that these
covers are removed from the pump before connecting
any pipes.

4.6.1 Suction and discharge pipework

Never use pump as a support for piping.
Maximum forces and moments allowed on the pump

flanges vary with the pump size and type. To minimize
these forces and moments that may, if excessive, cause
misalignment, hot bearings, worn couplings, vibration
and the possible failure of the pump casing, the
following points should be strictly followed:

• Prevent excessive external pipe load

• Never draw piping into place by applying force to

pump flange connections

• Do not mount expansion joints so that their force,

due to internal pressure, acts on the pump flange

Ensure piping and fittings are flushed
before use.

This is a check to ensure that there is no undue
stress on the driver holding down bolts; due to non­level baseplate or twisting. To check, remove all
shims and clean surfaces and tighten down driver to
the baseplate. Set a dial indicator as shown in sketch
and loosen off the holding down bolt while noting any
deflection reading on the dial test Indicator - a
maximum of 0.05 mm (0.002 in.) is considered
acceptable but any more will have to be corrected by
adding shims. For example, if the dial test indicator
shows the foot lifting 0.15 mm (0.006 in.) then this is
the thickness of shim to be placed under that foot.
Tighten down and repeat the same procedure on all
other feet until all are within tolerance.

Take into account the available NPSH
which must be higher than the required NPSH of the
pump.

Ensure piping for hazardous liquids is arranged

to allow pump flushing before removal of the pump.

4.6.1.1 CPX, CPXR and CPXN only

In order to minimize friction losses and hydraulic
noise in the pipework it is good practice to choose
pipework that is one or two sizes larger than the
pump suction and discharge. Typically main
pipework velocities should not exceed 2 m/s (6 ft/sec)
suction and 3 m/s (9 ft/sec) on the discharge.

4.6.1.2 CPXP self primer only

The delivery pipework must permit priming air to
escape unhindered from the pump during the priming
cycle, without back pressure and prevent excessive
run-back of liquid on shutdown to minimise syphoning.

Priming air may be vented in one of the following ways:

Page 13 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

1) The discharge pipework regulating valve, if fitted,
may be partly opened during the priming cycle to
freely vent the air.

2) An automatic air release valve may be fitted to the
discharge pipework, between the pump and any
valves, providing that gases and vapours given off
are environmentally safe and acceptable for
release into the atmosphere.

3) An air bleed pipe may be run from the discharge
pipework, between the pump and any valves, back
to the suction tank or sump. This arrangement will
require a manual or automatic control during normal
operation to prevent continuous re-circulation of the
pumped liquid.

4.6.2 Suction piping

4.6.2.1 CPX, CPXR and CPXN suction piping

a) The inlet pipe should be one or two sizes larger

than the pump inlet bore and pipe bends should
be as large a radius as possible.

b) On suction lift the piping should be inclined up

towards the pump inlet with eccentric reducers
incorporated to prevent air locks.

c) On positive suction, the inlet piping must have a

constant fall towards the pump.

d) The pipe next to the pump should be the same

diameter as the pump suction and have a minimum
of two pipe diameters of straight section between
the elbow and the pump inlet flange. Where the
NPSH margin is not large, it is recommended that
the pipe straight is 5 to 10 pipe diameter. (See
section 10.3, Reference 1.) Inlet strainers, when
used, should have a net 'free area' of at least three
times the inlet pipe area.

e) Fitting isolation and non-return valves will allow

easier maintenance.

f) Never throttle pump on suction side and never

place a valve directly on the pump inlet nozzle.

4.6.2.2 CPXP suction piping

a) The inlet pipe should be as short as possible,

airtight and the smallest volume as practical for the
pump flow rate so as to be able to prime in quickly.
Where inlet pipe volume is large an inlet ball-foot
valve or flap valve will be required.

b) It is recommended that the pump inlet pipe is no

larger than the pump inlet bore or such that the
suction velocity is in the range of 3 to 5 m/sec
(10 to 16 ft/sec). The piping should slope down
towards the pump casing suction flange.

c) Allow a minimum of two pipe diameters of straight

section between the elbow and inlet flange.

d) Fitting an isolation valve will allow easier

maintenance.

e) Never throttle pump on suction side and never

place a valve directly on the pump inlet nozzle.

4.6.3 Discharge piping

4.6.3.1 CPX, CPXR and CPXN discharge piping

a) A non-return valve should be located in the

discharge pipework to protect the pump from
excessive back pressure and hence reverse
rotation when the unit is stopped.

b) Fitting an isolation valve will allow easier

maintenance.

4.6.3.2 CPXP discharge piping

a) In order to minimize friction losses and hydraulic

noise in the pipework it is good practice to choose
pipework that is one or two sizes larger than the
pump discharge. Typically main pipework velocities
should not exceed 3 m/s (9 ft/sec) on the discharge.
Pipework expanders should have a maximum angle
of divergence of 9 degrees.

b) If a non-return valve is located in the discharge

pipework then a vent/bleed pipe should be fitted
from the discharge pipe back to the sump or
source tank.

c) A regulating valve should be fitted in the discharge

pipework unless pump flow is controlled by the
delivery system design.

4.6.4 Auxiliary piping

The connections that are to be piped
up will have been fitted with protective metal or
plastic plugs which will need to be removed.

4.6.4.1 CPX, CPXR and CPXN pumps fitted with
packed glands

When suction pressure is below ambient pressure
and differential head is less than 10 m (32.8 ft), it may
be necessary to feed gland packing with liquid to
provide lubrication and prevent the ingress of air.

4.6.4.2 Pumps fitted with mechanical seals

The conical design of the cover provides excellent
liquid circulation around the seal and will not normally
require a separate flush for single internal seals.

Single seals requiring re-circulation will normally be
provided with the auxiliary piping from pump casing
already fitted.

Page 14 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

Flowserve seal connections are designated as follows:
Q - quench
F - flush
D - drain outlet
BI - barrier fluid in (double seals)
BO - barrier fluid out (double seals)
H - heating jacket
C - cooling jacket

Covers having an auxiliary quench connection,
require connection to a suitable source of liquid flow,
low pressure steam or static pressure from a header
tank. Recommended pressure is 0.35 bar (5 psi) or
less. Check General arrangement drawing.

Dual seals, both pressurised and unpressurised,
require a barrier liquid between the seals, compatible
with the pumped liquid.

With back-to-back double seals, the barrier liquid
should be at a minimum pressure of 1 bar (14.5 psi)
above the maximum pressure on the pump side of
the inner seal. (See chart.) The barrier liquid
pressure must not exceed limitations of the seal on
the atmospheric side. For toxic service the barrier
liquid supply and discharge must be handled safely
and in line with local legislation.

Special seals may require modification to auxiliary
piping described above. Consult Flowserve if unsure
of correct method or arrangement.

For pumping hot liquids, to avoid seal damage, it is
recommended that any external flush/cooling supply
be continued after stopping the pump.

4.6.4.3 Pumps fitted with heating/cooling jackets

Connect the heating/cooling pipes from the site
supply. The top connection should be used as the
outlet to ensure complete filling/venting of the
annulus with heating/cooling liquids; steam is usually
in at the top, out at the bottom.

4.6.5 Final checks

Check the tightness of all bolts in the suction and
discharge pipework. Check also the tightness of all
foundation bolts.

4.7 Final shaft alignment check

After connecting piping to the pump, rotate the shaft
several times by hand to ensure there is no binding
and all parts are free. Recheck the coupling
alignment, as previously described, to ensure no pipe
strain. If pipe strain exists, correct piping.

4.8 Electrical connections

Notes:

a) Total seal pressure is equal to pressure at seal plus suction

pressure.

b) For pumped liquid viscosities greater than 440 Centistokes

multiply the differential pressure by 1.25 for 125, 160 and 200
size pumps and by 2.0 for larger sizes.

c) Differential pressure in bar equals head in metres multiplied by

specific gravity all divided by 10.19.

d) Ensure to check the seal minimum and maximum pressure

limits are not exceeded and the pressure is agreed with
Flowserve.

Electrical connections must be made
by a qualified Electrician in accordance with relevant
local national and international regulations.

It is important to be aware of the EUROPEAN
DIRECTIVE on potentially explosive areas where
compliance with IEC60079-14 is an additional
requirement for making electrical connections.

It is important to be aware of the EUROPEAN
DIRECTIVE on electromagnetic compatibility when
wiring up and installing equipment on site. Attention
must be paid to ensure that the techniques used during
wiring/installation do not increase electromagnetic
emissions or decrease the electromagnetic immunity of
the equipment, wiring or any connected devices. If in
any doubt contact Flowserve for advice.

The motor must be wired up in
accordance with the motor manufacturer's
instructions (normally supplied within the terminal
box) including any temperature, earth leakage,
current and other protective devices as appropriate.
The identification nameplate should be checked to
ensure the power supply is appropriate.

Page 15 of 44 flowserve.com

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A device to provide emergency stopping must

be fitted.
If not supplied pre-wired to the pump unit, the

controller/starter electrical details will also be supplied
within the controller/starter.

For electrical details on pump sets with controllers
see the separate wiring diagram.

See section 5.4, Direction of rotation

before connecting the motor to the electrical supply.

4.9 Protection systems

The following protection systems are
recommended particularly if the pump is installed in a
potentially explosive area or is handling a hazardous
liquid. If in any doubt consult Flowserve.

If there is any possibility of the system allowing the
pump to run against a closed valve or below
minimum continuous safe flow a protection device
should be installed to ensure the temperature of the
liquid does not rise to an unsafe level.

If there are any circumstances in which the system
can allow the pump to run dry, or start up empty, a
power monitor should be fitted to stop the pump or
prevent it from being started. This is particularly
relevant if the pump is handling a flammable liquid.

If leakage of product from the pump or its associated
sealing system can cause a hazard it is
recommended that an appropriate leakage detection
system is installed.

To prevent excessive surface temperatures at
bearings it is recommended that temperature or
vibration monitoring is carried out.

5 COMMISSIONING, START-UP,
OPERATION AND SHUTDOWN

These operations must be carried

out by fully qualified personnel.

5.1 Pre-commissioning procedure

5.1.1 Lubrication

Determine the mode of lubrication of the pump set,
eg grease, oil etc.

For oil lubricated pumps, fill the
bearing housing with correct grade of oil to the
correct level, ie sight glass [3856] or constant level
oiler bottle [3855].

When fitted with a constant level oiler, the bearing
housing should be filled by unscrewing or hinging back
the transparent bottle and filling it with oil. Where an
adjustable body Denco oiler is fitted this should be set to
the height shown in the following diagram:

The oil filled bottle should then be refitted so as to
return it to the upright position. Filling should be
repeated until oil remains visible within the bottle.

Approximate oil volumes are shown in section 5.2.2,
Bearing sizes and capacities.

Grease lubricated pumps and electric motors are
supplied pre-greased.

Where the ambient temperature is very low special
lubricants are required. Where oil lubrication is
utilized and the ambient is less than -5 °C (23 °F)
ensure the oil’s pour point is at least 15 °C (27 °F)
below the ambient temperature or use oil class SAE
5W-50 or API-SJ and ensure the upper operating
range of the oil is then not exceeded.

Other drivers and gearboxes, if appropriate, should
be lubricated in accordance with their manuals.

Page 16 of 44 flowserve.com

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5.2 Pump lubricants

5.2.1 Recommended oil lubricants

Oil Splash / force feed / purge oil mist lubrication

Viscosity cSt

@ 40 ºC

Oil temperature range *

lubrication

Centrifugal pump

Oil companies and

* Note that it normally takes 2 hours for bearing temperature to stabilize and the final temperature will depend on the ambient, r/min, pumpage
temperature and pump size. Also some oils have a greater viscosity index than the minimum acceptable of 95 (eg Mobil DTE13M) which may
extend the minimum temperature capability of the oil. Always check the grade capability where the ambient is less than -5 ºC (23 ºF).

†

Use LSC for oil mist. Oil parameters provide flash point >166 ºC (331 ºF), density >0.87 @ 15 ºC (59 ºF), pour point of -10 ºC (14 ºF) or lower.

Designation to ISO 3448

and DIN51524 part 2

BP Castrol †

ESSO †

ELF/Total †

LSC (for oil mist)

ExxonMobil †

lubricants

Wintershall (BASF Group) †

Q8 †

Shell †

Chevron Texaco †

Fuchs †

Energol HLP-HM 32 Energol HLP-HM 46 Energol HLP-HM 68

LSO 32 (Synthetic oil) LSO 46 (Synthetic oil) LSO 68 (Synthetic oil)

5.2.2 Bearing sizes and capacities

Frame

size

1
2
3
4

* Nilos ring fitted into bearing locknut [3712.2]

Frame

size

1
2
3
4

Note: the bearing sizes do not constitute a purchasing specification.

Grease lubricated

medium duty bearings

Pump end Drive end Pump end Drive end* Pump end Drive end

6207 Z C3
6309 Z C3

6311 Z C3

6313 Z C3

Oil lubricated

medium duty bearings

Pump end Drive end Pump end Drive end Pump end Drive end

6207 C3
6309 C3
6311 C3
6313 C3

3306 Z C3
3309 Z C3
3311 Z C3
3313 Z C3

3306 C3
3309 C3
3311 C3
3313 C3

Oil lubricated

heavy duty bearings

6207 C3
6309 C3
6311 C3
6313 C3

5.2.3 Recommended grease lubricants

Grease NLGI 2 * NLGI 3

Temp. range

Designation

acc. to DIN

BP
Elf

Fuchs

ESSO

Mobil

Q8

Shell

Texaco

SKF

* NLGI 2 is an alternative grease and is not to be mixed with other

grades.

** Standard pre-packed grease for fitted antifriction bearings.

-20 to +100 ºC
(-4 to +212 ºF)

KP2K-25 KP3K-20

Energrease LS-EP2 Energrease LS-EP3

Multis EP2 Multis EP3

RENOLIT EP2 RENOLIT EP3

Beacon EP2 Beacon EP3
Mobilux EP2 Mobilux EP3 **

Rembrandt EP2 Rembrandt EP3

Alvania EP2 Alvania EP2

Multifak EP2 Multifak EP3

LGEP 2

-20 to +100 ºC
(-4 to +212 ºF)

32 46 68

-5 to 65 ºC

(23 to 149 ºF)

ISO VG 32

32 HLP

NUTO HP 32 NUTO HP 46 NUTO HP 68

ELFOLNA DS 32

Azolla ZS 32

Mobil DTE 24 Mobil DTE 25 Mobil DTE 26

Q8 Haydn 32 Q8 Haydn 46 Q8 Haydn 68

Shell Tellus 32 Shell Tellus 46 Shell Tellus 68

Rando HD 32 Rando HD 46 Rando HD 68

Wiolan HS32 Wiolan HS46 Wiolan HS68

Renolin CL 32 Renolin CL 46 Renolin CL 68

Grease lubricated

heavy duty bearings

6207 Z C3
6309 Z C3
6311 Z C3
6313 Z C3

7306 pair back-to-back
7309 pair back-to-back
7311 pair back-to-back
7313 pair back-to-back

7306 pair back-to-back
7309 pair back-to-back
7311 pair back-to-back
7313 pair back-to-back

NUP 207 C3
NUP 309 C3

NUP 313 C3

-5 to 78 ºC

(23 to 172 ºF)

ISO VG 46

46 HLP

ELFOLNA DS 46

Azolla ZS 46

Oil lubricated optional

heavy duty bearings

7306 pair back-to-back

NUP 311 C3

7309 pair back-to-back
7311 pair back-to-back
7313 pair back-to-back

-5 to 80 ºC

(23 to 176 ºF)

ISO VG 68

68 HLP

ELFOLNA DS 68

Azolla ZS 68

Grease lubricated bearing

capacities g (oz.)

6 (0.2.)
13 (0.5)
18 (0.6)
20 (0.7)

14 (0.5)
25 (0.9)
35 (1.2)
46 (1.6)

Frame oil capacity

(approx.)

litre (fl.oz)

0.7 (23)

1.8 (61)

1.4 (47)

2.8 (95)

5.2.4 Recommended fill quantities

Refer to section 5.2.2, Bearing sizes and capacities.

5.2.5 Lubrication schedule

5.2.5.1 Oil lubricated bearings

Normal oil change intervals are 4 000 operating hours
or not more than 6 months. For pumps on hot service
or in severely damp or corrosive atmosphere, the oil
will require changing more frequently. Lubricant and
bearing temperature analysis can be useful in
optimizing lubricant change intervals.

The lubricating oil should be a high quality mineral oil
having foam inhibitors. Synthetic oils may also be
used if checks show that the rubber oil seals will not be
adversely affected.

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The bearing temperature may be allowed to rise to
50 ºC (90 ºF) above ambient, but should not exceed
82 ºC (180 ºF) (API 610 limit). A continuously rising
temperature, or an abrupt rise, indicates a fault.

Pumps which handle high temperature liquids may
require their bearings to be cooled to prevent bearing
temperatures exceeding their limits.

5.2.5.2 Grease lubricated bearings

When grease nipples are fitted, one charge between
grease changes is advisable for most operating
conditions; ie 2 000 hours interval. Normal intervals
between grease changes are 4 000 hours or not
more than 6 months.

The characteristics of the installation and severity of
service will determine the frequency of lubrication.
Lubricant and bearing temperature analysis can be
useful in optimizing lubricant change intervals.

The bearing temperature may be allowed to rise to
55 ºC (99 ºF) above ambient, but should not exceed
95 ºC (204 ºF). For most operating conditions, a
quality grease having a lithium soap base and NLGI
consistency of No 2 or No 3 is recommended. The
drop point should exceed 175 ºC (350 ºF).

Never mix greases containing different

bases, thickeners or additives.

5.3 Open impeller clearance

The impeller clearance is set in the factory. This may
require adjustment because of piping attachment or
increase in temperatures. For setting instructions see
section 6.7, Setting impeller clearance.

5.4 Direction of rotation

Serious damage can result if the pump

is started or run in the wrong direction of rotation.
The pump is shipped with the coupling element

removed. Ensure the direction of rotation of the motor is
correct before fitting the coupling element. Direction of
rotation must correspond to the direction arrow.

If maintenance work has been carried
out to the site's electricity supply, the direction of
rotation should be re-checked as above in case the
supply phasing has been altered.

5.5 Guarding

Guarding is supplied fitted to the pump set.

In member countries of the EU and EFTA, it is a legal
requirement that fasteners for guards must remain
captive in the guard to comply with the Machinery
Directive 2006/42/EC. When releasing such guards,
the fasteners must be unscrewed in an appropriate
way to ensure that the fasteners remain captive.

Whenever guarding is removed or disturbed ensure
that all the protective guards are securely refitted
prior to start-up.

5.6 Priming and auxiliary supplies

5.6.1 CPX, CPXR and CPXN filling and priming

Ensure inlet pipe and pump casing is
completely full of liquid before starting continuous
duty operation.

Priming may be carried out with an ejector, vacuum
pump interceptor or other equipment, or by flooding
from the inlet source.

When in service, pumps using inlet pipes with foot
valves may be primed by passing liquid back from the
outlet pipe through the pump.

5.6.2 CPXP filling and self priming

Fill the pump with liquid to be pumped,
or compatible liquid, via the filling plug [6569.4],
before starting continuous duty operation.

Pump housing
filling hole.

When the initial fill
reaches the suction
pipe, excess liquid will
flow out of the casing.

Pump size Initial fill litre (US gal.)

40-40CPXP125 2.5 (0.65)
80-80CPXP125 6.0 (1.50)
40-40CPXP160 3.0 (0.80)
80-80CPXP160 6.5 (1.75)
40-40CPXP200 5.0 (1.35)
65-65CPXP200 8.5 (2.25)

80-80CPXP250 12.0 (3.20)
100-100CPXP250 36.0 (9.50)
100-100CPXP315 14.8 (3.95)
150-150CPXP315 18.0 (4.80)

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The pump has self-priming action for which a separate
air pump is not normally required.

5.6.3 Auxiliary supplies

Ensure all electrical, hydraulic,
pneumatic, sealant and lubrication systems (as
applicable) are connected and operational.

5.7 Starting the pump

5.7.1 Starting the CPX, CPXR and CPXN

a) Ensure flushing and/or cooling/

heating liquid supplies are turned ON, before

starting pump.
b) CLOSE the outlet valve.
c) OPEN all inlet valves.
d) Prime the pump.
e) Start motor and check the outlet pressure.
f) If the pressure is satisfactory, SLOWLY open the

outlet valve.
g) Do not run the pump against a

closed valve for more than 30 seconds.
h) If the pump has to fill the system it may take a

short time before the outlet is pressurised.
i) If NO pressure, or LOW pressure, STOP the

pump. Refer to section 7, Faults; causes and

remedies for fault diagnosis.

5.7.2 Starting the CPXP pump

a) Ensure flushing and/or cooling/

heating liquid supplies are turned ON, before

starting pump.
b) CLOSE the outlet valve.
c) OPEN all inlet valves.

d) Prime the pump. (See section

5.6.2.) The pump casing MUST initially be filled

with compatible liquid before starting the unit.
e) Damage will occur if the pump is run dry or for

prolonged periods with no incoming liquid.
f) Subsequent filling should not be necessary unless

the pump has been emptied or drained of fluid.
g) Start the motor and, if no specific provision has

been made in the delivery pipework for evacuating

the primed air, open the delivery valve by

approximately 10% to allow priming air to escape.
h) When the pump has primed, check outlet

pressure.
i) If the pressure is satisfactory, SLOWLY open the

outlet valve.

j) It is recommended that the priming time is noted.

Priming times in excess of 5 minutes will indicate
a pump or system fault. Any noticeable
increases in priming time on subsequent starts
will also indicate a fault. Irregular use could lead
to the risk of 'evaporation' of the priming fluid.

k) Do not run the pump with the outlet

valve closed for a period longer than 30 seconds.

l) If the pump has to fill the system it may take a

short time before the outlet is pressurized.

m) If NO pressure, or LOW pressure, STOP the

pump. Refer to section 7, Faults; causes and
remedies for fault diagnosis.

5.8 Running the pump

5.8.1 Pumps fitted with packed gland

If the pump has a packed gland there must be some
leakage from the gland. Gland nuts should initially be
finger-tight only. Leakage should take place soon
after the stuffing box is pressurised.

The gland must be adjusted evenly to give
visible leakage and concentric alignment of the gland
ring to avoid excess temperature. If no leakage takes
place the packing will begin to overheat. If
overheating takes place the pump should be stopped
and allowed to cool before being re-started. When
the pump is re-started, check to ensure leakage is
taking place at the packed gland.

If hot liquids are being pumped it may be necessary to
slacken the gland nuts to achieve leakage.

The pump should be run for 30 minutes with steady
leakage and the gland nuts tightened by 10 degrees at a
time until leakage is reduced to an acceptable level,
normally 30 to 120 drops per minute. Bedding in of the
packing may take another 30 minutes.

Care must be taken when adjusting the gland

on an operating pump. Safety gloves are essential.
Loose clothing must not be worn to avoid being

caught up by the pump shaft. Shaft guards must be
replaced after the gland adjustment is complete.

Never run gland packing dry, even for

a short time.

5.8.2 Pumps fitted with mechanical seal

Mechanical seals require no adjustment. Any slight
initial leakage will stop when the seal is run in.

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Before pumping dirty liquids it is advisable, if possible, to
run the pump in using clean liquid to safeguard the seal
face.

External flush or quench should be
started before the pump is run and allowed to flow for a
period after the pump has stopped.

Never run a mechanical seal dry,
even for a short time.

5.8.3 Bearings

If the pumps are working in a potentially
explosive atmosphere temperature or vibration
monitoring at the bearings is recommended.

If bearing temperatures are to be monitored it is
essential that a benchmark temperature is recorded
at the commissioning stage and after the bearing
temperature has stabilized.

• Record the bearing temperature (t) and the

ambient temperature (ta)

• Estimate the likely maximum ambient

temperature (tb)

• Set the alarm at (t+tb-ta+5) ºC (t+tb-ta+10) ºF

and the trip at 100 ºC (212 ºF) for oil lubrication
and 105 ºC (220 ºF) for grease lubrication

It is important, particularly with grease lubrication, to
keep a check on bearing temperatures. After start up
the temperature rise should be gradual, reaching a
maximum after approximately 1.5 to 2 hours.

This temperature should then remain constant or
marginally reduce with time. Refer to section 5.2.5
for further information.

5.8.4 Normal vibration levels, alarm and trip

For guidance, pumps generally fall under a classification
for rigid support machines within the International
rotating machinery standards and the recommended
maximum levels below are based on those standards.

Alarm and trip values for installed
pumps should be based on the actual measurements
(N) taken on the pump in the fully commissioned as
new condition. Measuring vibration at regular
intervals will then show any deterioration in pump or
system operating conditions.

Vibration velocity –

unfiltered r.m.s.

Normal N
Alarm N x 1.25
Shutdown trip N x 2.0

Motor ≤≤≤≤ 15 kW

mm/sec (in./sec)

Horizontal pumps

Motor > 15 kW

mm/sec (in./sec)

≤ 3.0 (0.12) ≤ 4.5 (0.18)
≤ 3.8 (0.15) ≤ 5.6 (0.22)
≤ 6.0 (0.24) ≤ 9.0 (0.35)

Where a grease lubricated unit is utilized in a vertical
shaft configuration with a duck-foot bend onto the
pump suction, the following apply:

Vibration velocity

– unfiltered r.m.s

Normal N
Alarm N x 1.25
Shutdown trip N x 2.0

Vertical configurations

mm/sec (in./sec)

≤ 7.1 (0.28)
≤ 9.0 (0.35)

≤ 14.2 (0.56)

5.8.5 Stop/start frequency

Pump sets are normally suitable for the number of
equally spaced stop/starts per hour shown in the
table below. Check capability of the driver and
control/starting system before commissioning.

Motor rating kW (hp)

Up to 15 (20) 15

Between 15 (20) and 90 (120) 10

Above 90 (120) 6

Maximum stop/starts

per hour

Where duty and standby pumps are installed it is
recommended that they are run alternately every week.

5.9 Stopping and shutdown

a) Close the outlet valve, but ensure

that the pump runs in this condition for no more

than a few seconds.
b) Stop the pump.
c) Switch off flushing and/or cooling/heating liquid

supplies at a time appropriate to the process.
d) For prolonged shut-downs and

especially when ambient temperatures are likely

to drop below freezing point, the pump and any

cooling and flushing arrangements must be

drained or otherwise protected.

5.10 Hydraulic, mechanical and electrical
duty

This product has been supplied to meet the performance
specifications of your purchase order, however it is
understood that during the life of the product these may
change. The following notes may help the user decide
how to evaluate the implications of any change. If in
doubt contact your nearest Flowserve office.

5.10.1 Specific gravity (SG)

Pump capacity and total head in metres (feet) do not
change with SG, however pressure displayed on a
pressure gauge is directly proportional to SG. Power
absorbed is also directly proportional to SG. It is
therefore important to check that any change in SG
will not overload the pump driver or over-pressurize
the pump.

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5.10.2 Viscosity

For a given flow rate the total head reduces with
increased viscosity and increases with reduced
viscosity. Also for a given flow rate the power
absorbed increases with increased viscosity, and
reduces with reduced viscosity. It is important that
checks are made with your nearest Flowserve office if
changes in viscosity are planned.

5.10.3 Pump speed

Changing pump speed effects flow, total head, power
absorbed, NPSHR, noise and vibration. Flow varies in
direct proportion to pump speed, head varies as speed
ratio squared and power varies as speed ratio cubed.
The new duty, however, will also be dependent on the
system curve. If increasing the speed, it is important
therefore to ensure the maximum pump working
pressure is not exceeded, the driver is not overloaded,
NPSHA > NPSHR, and that noise and vibration are
within local requirements and regulations.

5.10.4 Net positive suction head (NPSHA)

NPSH available (NPSHA) is a measure of the head
available in the pumped liquid, above its vapour
pressure, at the pump suction branch.

NPSH required (NPSHR) is a measure of the head
required in the pumped liquid, above its vapour
pressure, to prevent the pump from cavitation. It is
important that NPSHA > NPSHR. The margin between
NPSHA > NPSHR should be as large as possible.

If any change in NPSHA is proposed, ensure these
margins are not significantly eroded. Refer to the
pump performance curve to determine exact
requirements particularly if flow has changed.

If in doubt please consult your nearest Flowserve
office for advice and details of the minimum allowable
margin for your application.

5.10.5 Pumped flow

Flow must not fall outside the minimum and
maximum continuous safe flow shown on the pump
performance curve and or data sheet.

6 MAINTENANCE

6.1 General

It is the plant operator's responsibility to ensure
that all maintenance, inspection and assembly work
is carried out by authorized and qualified personnel
who have adequately familiarized themselves with
the subject matter by studying this manual in detail.
(See also section 1.6.)

Any work on the machine must be performed when it
is at a standstill. It is imperative that the procedure
for shutting down the machine is followed, as
described in section 5.9.

Guard fasteners must remain captive during
dismantling of guards, as described in section 5.5.

On completion of work all guards and safety devices
must be re-installed and made operative again.

Before restarting the machine, the relevant
instructions listed in section 5, Commissioning, start
up, operation and shut down must be observed.

Oil and grease leaks may make the ground
slippery. Machine maintenance must always
begin and finish by cleaning the ground and the
exterior of the machine.

If platforms, stairs and guard rails are required for
maintenance, they must be placed for easy access to
areas where maintenance and inspection are to be
carried out. The positioning of these accessories
must not limit access or hinder the lifting of the part to
be serviced.

When air or compressed inert gas is used in the
maintenance process, the operator and anyone in the
vicinity must be careful and have the appropriate
protection.

Do not spray air or compressed inert gas on skin.
Do not direct an air or gas jet towards other people.

Never use air or compressed inert gas to clean
clothes.

Before working on the pump, take measures to
prevent an uncontrolled start. Put a warning board
on the starting device with the words:
"Machine under repair: do not start".

With electric drive equipment, lock the main switch
open and withdraw any fuses. Put a warning board
on the fuse box or main switch with the words:
"Machine under repair: do not connect".

Never clean equipment with inflammable solvents or
carbon tetrachloride. Protect yourself against toxic
fumes when using cleaning agents.

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6.2 Maintenance schedule

It is recommended that a maintenance plan and
schedule is adopted, in line with these User
Instructions, to include the following:
a) Any auxiliary systems installed must be monitored,

if necessary, to ensure they function correctly.

b) Gland packings must be adjusted correctly to

give visible leakage and concentric alignment of
the gland follower to prevent excessive
temperature of the packing or follower.

c) Check for any leaks from gaskets and seals.

The correct functioning of the shaft seal must be
checked regularly.

d) Check bearing lubricant level, and if the hours

run show a lubricant change is required.

e) Check that the duty condition is in the safe

operating range for the pump.

f) Check vibration, noise level and surface temperature

at the bearings to confirm satisfactory operation.

g) Check dirt and dust is removed from areas around

close clearances, bearing housings and motors.

h) Check coupling alignment and re-align if necessary.
Our specialist service personnel can help with

preventative maintenance records and provide
condition monitoring for temperature and vibration to
identify the onset of potential problems.

If any problems are found the following sequence of
actions should take place:
a) Refer to section 7, Faults; causes and remedies,

for fault diagnosis.

b) Ensure equipment complies with the

recommendations in this manual.

c) Contact Flowserve if the problem persists.

6.2.1 Routine inspection (daily/weekly)

The following checks should be made
and the appropriate action taken to remedy any
deviations:
a) Check operating behaviour. Ensure noise,

vibration and bearing temperatures are normal.

b) Check that there are no abnormal fluid or

lubricant leaks (static and dynamic seals) and
that any sealant systems (if fitted) are full and
operating normally.

c) Check that shaft seal leaks are within acceptable

limits.

d) Check the level and condition of oil lubricant. On

grease lubricated pumps, check running hours
since last recharge of grease or complete grease
change.

e) Check any auxiliary supplies eg heating/cooling

(if fitted) are functioning correctly.

Refer to the manuals of any associated

equipment for routine checks needed.

6.2.2 Periodic inspection (six monthly)

a) Check foundation bolts for

security of attachment and corrosion.

b) Check pump running records for hourly usage to

determine if bearing lubricant requires changing.

c) The coupling should be checked for correct

alignment and worn driving elements.

Refer to the manuals of any associated

equipment for periodic checks needed.

6.2.3 Re-lubrication

For general guidelines refer to section 5.2.5,

Lubrication schedule.

Lubricant and bearing temperature analysis can be
useful in optimizing lubricant change intervals.

6.2.4 Mechanical seals

When leakage becomes unacceptable the seal [4200]
will need replacement.

6.2.5 Gland packing

The stuffing box split gland [4120] can be completely
removed for re-packing or to enable the addition of extra
rings of packing. The stuffing box is normally supplied
with a lantern ring [4134] to enable a clean or
pressurised flush to the centre of the packing. If not
required, this can be replaced by an extra 2 rings of
packing.

6.3 Spare parts

6.3.1 Ordering of spares

Flowserve keeps records of all pumps that have been
supplied. When ordering spares the following
information should be quoted.

1) Pump serial number.

2) Pump size.

3) Part name – taken from section 8.

4) Part number – taken from section 8.

5) Number of parts required.

The pump size and serial number are shown on the
pump nameplate.

To ensure continued satisfactory operation,
replacement parts to the original design specification
should be obtained from Flowserve. Any change to
the original design specification (modification or use

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CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

of a non-standard part) will invalidate the pump’s
safety certification.

6.3.2 Storage of spares

Spares should be stored in a clean dry area away
from vibration. Inspection and re-treatment of
metallic surfaces (if necessary) with preservative is
recommended at 6 monthly intervals.

6.4 Recommended spares

For two years operation (as per VDMA 24296).

Part no. Designation

2200 Impeller 1 2 3 30%
2100 Shaft 1 2 3 30%

3712.1 Bearing locknut 1 2 3 4 50%
2400 Sleeve (if fitted) 2 3 4 50%
3011 Radial ball bearing 1 2 3 4 50%
3013 Thrust bearing 1 2 3 4 50%

4590.1 * Gasket 4 6 8 9 12 150%

4610.1 O-ring 4 6 8 9 12 150%

4610.2 O-ring 4 6 8 9 10 100%

2540.2 Flinger 1 2 3 30%
4130 Gland packing 2 3 4 40%
4134 Lantern ring 1 2 3 30%
4200 Mechanical seals 1 2 3 30%

- Power end - - - - - 1 2

* Note: for CPXR replace with the following part:

4590.1 Gasket 8 12 16 18 24 300%

Additional spares for keyed impeller option

2912.1 /

2912.2

4610.4

4610.5 O-ring 4 6 8 9 12 150%

6700.2 Key 1 2 3 30%

Impeller nut 1 2 3 30%
O-ring

(if sleeve fitted)

Number of pumps

(including stand-by)

2 3 4 5 6/7 8/9 10(+)

2 3 4 50%

6.5 Tools required

A typical range of tools that will be required to
maintain these pumps is listed below.

Readily available in standard tool kits, and dependent
on pump size:

• Open ended spanners (wrenches) to suit up to
M 24 screws/nuts

• Socket spanners (wrenches), up to M 24 screws

• Allen keys, up to 10 mm (A/F)

• Range of screwdrivers

• Soft mallet

More specialized equipment:

• Bearing pullers

• Bearing induction heater

• Dial test indicator

• C-spanner (wrench) - for removing shaft nut.

(If difficulties in sourcing are encountered, consult
Flowserve.)

• Coupling grip/shaft spanner

6.6 Fastener torques

Fastener Screw size Torque Nm (lbf ft)

All except where
otherwise stated

Impeller nut

M8
M10
M12
M16
M20

M12
M16
M22
M24

16 (12)
25 (18)
35 (26)
80 (59)
130 (96)

16 (12)
41 (31)
106 (79)

135 (100)

Non-metallic gaskets incur creep
relaxation - before commissioning the pump check
and retighten fasteners to tightening torques stated.

6.7 Setting impeller clearance

This procedure may be required after the pump has
been dismantled or a different clearance is required.

Before carrying out this procedure ensure that the
mechanical seal(s) [4200] fitted can tolerate a change
in their axial setting, otherwise it will be necessary to
dismantle the unit and reset the seal axial position
after adjusting the impeller clearance.

(*)150CPX400
(*)200CPX400
(*)150CPX500

1.0 (0.040)

1.0 (0.040)

1.1 (0.044)

1.2 (0.048)

1.3 (0.052)

Temp

ºC

(ºF)

50 (122)
100 (212)
150 (302)
200 (392)
250 (482)

Impellers

up to

210 mm

0.3 (0.012)

0.4 (0.016)

0.5 (0.020)

0.6 (0.024)

0.7 (0.028)

Clearance mm (in.)

Impellers

211 mm to

260 mm

0.4 (0.016)

0.5 (0.020)

0.6 (0.024)

0.7 (0.028)

0.8 (0.032)

Impellers

over 260 mm

(except *)

0.5 (0.020)

0.6 (0.024)

0.7 (0.028)

0.8 (0.032)

0.9 (0.036)

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a) Disconnect the coupling if it has limited axial

flexibility

b) Record the gap between the bearing carrier

[3240] and bearing housing [3200] using feeler
gauges.

c) Loosen the bearing carrier screws [6570.2] and

back off the bearing carrier 2 mm (0.08 in.) using

the jacking screws [6570.3].
For CPX, CPXN and CPXP
d) Tighten the bearing carrier screws [6570.2] evenly,

drawing the bearing carrier towards the bearing

housing, until the impeller [2200] contacts the pump

casing. [1100] Turn the shaft [2100], during this

procedure, until a detectable rub is obtained. This

is the zero clearance position.
e) Set a dial indicator to zero on the shaft end or

measure the bearing carrier to bearing housing

gap and record the measurement.
f) Slacken the bearing carrier screws [6570.2].
g) Tighten jacking screws [6570.3] evenly (about one

flat at a time) until the dial indicator or feeler gauge

shows the correct impeller clearance from the zero

clearance position. This clearance should be

between 0.3 and 2 mm (0.008 and 0.080 in.)

depending on the nature of the pumped fluid. (See

table above.)
h) Evenly tighten the bearing carrier screws [6570.2]

keeping the dial indicator or feeler gauges

reading the correct setting. Then tighten the hex

nuts [6580.1] to lock the jacking screws in

position.

For CPXR only

h) Tighten the jacking screws [6570.3] until they

contact the bearing carrier, keeping the dial
indicator or feeler gauges reading the correct
setting. Then tighten the hex nuts [6580.1] to
lock the jacking screws in position.

For all pump types

i) Compare the original and final gaps between the

bearing carrier and bearing housing to check if
the movement of the shaft has exceeded the seal
capability (over/under compression of seal).
Re-position the seal to correct this.

j) Check that the shaft [2100] can turn freely without

binding.

k) If a cartridge seal [4200] is fitted it should be

reset at this point.

l) Ensure the coupling distance between shaft ends

(DBSE) is correct. Reset/re-align if necessary.

6.8 Disassembly

Refer to Safety section before dismantling the

pump.

The impeller does not have a fine front
clearance setting and adjustment of the impeller
is not normally required.

d) Tighten the jacking screws [6570.3] evenly, pushing

the bearing carrier away from the bearing housing,
until the impeller [2200] contacts the cover. [1220]
Turn the shaft [2100], during this procedure, until a
detectable rub is obtained. This is the zero
clearance position.

e) Set a dial indicator to zero on the shaft end or

measure the bearing carrier to bearing housing
gap and record the measurement.

f) Slacken the jacking screws [6570.3].
g) Tighten bearing carrier screws [6570.2] evenly

(about one flat at a time) until the dial indicator or
feeler gauge shows the correct impeller clearance
from the zero clearance position. This clearance
should be 1.5 - 2 mm (0.06 - 0.08 in.) (See drawing.)

Page 24 of 44 flowserve.com

overhaul, ensure genuine Flowserve replacement
parts are available.

Refer to sectional drawings for part numbers and
identification. See section 8, Parts lists and drawings.

6.8.1 Bearing housing

To remove, proceed as follows:
a) Disconnect all auxiliary pipes and tubes where

applicable.
b) Remove coupling guard and disconnect coupling.
c) If oil lubricated frame, drain oil by removing drain

plug [6569.3].
d) Record the gap between the bearing carrier and

bearing housing so that this setting can be used

during workshop assembly.
e) Place hoist sling through bearing housing window.
f) Remove casing screws [6570.1] and support foot

to baseplate screws.

Before dismantling the pump for

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

g) Remove bearing housing assembly from pump

casing.

h) The two threaded holes in the bearing housing

flange can be used for jacking screws to assist
with removal.

i) Remove pump casing gasket [4590.1] and

discard. A replacement gasket will be required
for assembly.

j) Clean gasket mating surfaces.

On CPXP diffuser casing sizes it is not

normally necessary to remove the diffuser [1410,

4590.2 and 6570.5].

6.8.2 Impeller removal

NEVER APPLY HEAT TO REMOVE THE
IMPELLER. TRAPPED OIL OR LUBRICANT MAY
CAUSE AN EXPLOSION.

6.8.2.1 Impeller removal with threaded on impeller

a) Fit a chain wrench or bolt a bar to the holes in the

coupling half, or fit a keyed shaft wrench directly
to the shaft.

b) Using gloved hands, raise the wrench above the

work bench by turning the impeller [2200] clockwise
as viewed from the impeller end of the shaft.

c) Give the impeller a quick turn counter-clockwise

to strike the wrench handle against the work
bench surface or a wooden block. This will free
the impeller from the shaft.

d) The loosened impeller has an O-ring [4610.1]

that should be discarded. Use a new O-ring for
assembly.

6.8.2.2 Impeller removal with key drive impeller

a) Remove impeller nut [2912.1/2912.2] complete with

O-ring [4610.5], which should be discarded. (A new

O-ring will be required for assembly.)
b) Pull impeller off shaft.
c) Remove impeller key [6700.2].
d) Remove impeller sealing gasket [4590.4] and

discard. (A new sealing gasket will be required for

assembly.)

6.8.3 Cover [1220] and seal [4200]
The seal manufacturer's instructions should be followed
for dismantling and assembly, but the following
guidance should assist with most seal types:
a) Remove shaft guard.
b) Remove the seal gland nuts, if a separate seal

gland is fitted, and slide the seal gland away.
c) Remove the cover screws.
d) Loosen the grub screws (used in most

mechanical seals).

e) Carefully pull off the gland and mechanical seal

rotating element(s).
f) Remove the seal cover [1220].
g) Remove shaft sleeve [2400] (if fitted).
h) On non-cartridge seals the stationary seat

remains in the cover with its sealing member.

Remove only if damaged or worn out.
i) On pumps fitted with gland packing, the packing

and lantern ring should be removed only if the

packing is to be replaced.

6.8.4 Bearing housing

a) Pull off the pump half of the coupling and remove

the coupling key.
b) Remove support foot [3134] (if necessary).
c) Remove the pump side liquid flinger [2540.2] and/or

labyrinth seal rotary half (depending on option fitted).
d) Slacken the nuts and remove bearing carrier screws.
e) Tighten bearing carrier jacking screws evenly to

initiate bearing carrier release.
f) Remove bearing carrier and shaft assembly from the

bearing housing by pulling it towards the coupling end.
g) Remove bearing circlip (or bearing carrier locking

ring if paired angular contact bearings are fitted).

Bearing carrier locking rings are left-

hand thread.
h) Remove drive side liquid flinger and/or labyrinth

seal rotary half (depending on option fitted).
i) Remove bearing carrier.
j) Remove pump side bearing.
k) Release the self locking drive side bearing nut

and remove drive side bearing.
l) When pressing bearings off the shaft, use force

on the inner race only.

6.9 Examination of parts

Used parts must be inspected before
assembly to ensure the pump will subsequently run
properly. In particular, fault diagnosis is essential to
enhance pump and plant reliability.

6.9.1 Casing [1100], cover [1220] and impeller
[2200]
Inspect for excessive wear, pitting, corrosion, erosion
or damage and any sealing surface irregularities.
Replace as necessary.

6.9.2 Shaft and sleeve (if fitted) [2200, 2400]
Replace if grooved or pitted. With the bearing
mounting diameters (or bearing outer) supported by
V-blocks, check that the shaft runouts are within

0.025 mm (0.001 in.) at the coupling end and

0.050 mm (0.002 in.) at the impeller end.

Page 25 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

Grease

retainer

6.9.3 Gaskets and O-rings [4590, 4610]
After dismantling, discard and replace.

6.9.4 Bearings [3011,3013]
It is recommended that bearings are not re-used after
any removal from the shaft.

The bearings and lubricant are to be inspected for
contamination and damage. If oil bath lubrication is
utilized, these provide useful information on operating
conditions within the bearing housing.

If bearing damage is not due to
normal wear and the lubricant contains adverse
contaminants, the cause should be corrected before
the pump is returned to service.

6.9.5 Bearing labyrinths/isolators [4330]
Labyrinth seals and bearing isolators should be
inspected for damage but are normally non-wearing
parts and can be re-used.

Bearing seals are not totally leak free devices. Oil from
these may cause staining adjacent to the bearings.

6.9.6 Bearing housing and carrier [3200, 3240]
Inspect the bearing carrier circlip groove. Ensure it is
free from damage and that housing lubrication
passages are clear.

Replace grease nipples or the filter breather (where
fitted) if damaged or clogged. On oil lubricated
versions, the oil level sight glass [3856] should be
replaced if oil stained.

6.10 Assembly

To assemble the pump consult the sectional
drawings. See section 8, Parts lists and drawings.

Ensure threads, gasket and O-ring mating faces are
clean. Apply thread sealant to non-face sealing pipe
thread fittings.

6.10.1 Bearing housing and rotating element
assembly

a) Clean the inside of the bearing housing [3200],

bearing carrier [3240] and bores for bearings.
b) Attach bearing housing support foot.
c) The following methods are recommended for fitting

the bearings onto the shaft:

Method 1: Use a hotplate, hot bath, oven or

induction heater to heat the bearing race so it can

easily be placed in position then allowed to shrink

and grip the shaft. It is important that the

temperature is not raised above 100 ºC (212 ºF).

Method 2: Press the bearing onto the shaft using
equipment that can provide a steady, even load to
the inner race. Take care to avoid damaging the

bearing and shaft.
d) Fit the thrust ball bearing [3013] on to shaft [2100].
e) The double row thrust bearing will not normally

have a single filling slot, as such bearings are

limited to taking thrust in only one direction. If

such a bearing replacement is used, it must be

positioned on the shaft so that the bearing filling

slot faces the impeller end of the shaft.
f) If the pair of angular contact thrust bearings are to

be fitted, these must be mounted back-to-back, as

shown below:

[3864]

Grease retainer (clearance type) is only
fitted on grease lubricated option units

g) With bearings at ambient temperature, screw on

to the shaft the self-locking bearing locknut

[3712.1] (with its polyamide insert facing away

from the bearing) until tight.
h) With double row thrust bearings place the

bearing circlip [6544] over the shaft, with the

tapered face facing the impeller end.
i) With the pair of angular contact thrust bearing

option, the bearing locknut [3712.2] should be

placed placed on the shaft before fitting the pump

radial bearing having the larger diameter end

facing the impeller end.
j) Fit pump radial ball bearing [3011] onto the shaft

using Method 1 or 2 above.
k) With the NUP roller bearing option, the loose ring

should be against the shaft shoulder.
l) Fit O-ring [4610.2] on the bearing carrier. Lightly

lubricate the bearing carrier bore and O-ring.
m) Ensure the shaft keyway edges are free of burrs.

During installation, use tape or similar over the

keyway to avoid damaging the drive side bearing

seals.
n) Slide the bearing carrier [3240] onto the

shaft/bearing assembly and insert bearing circlip

[6544] into the carrier groove or screw up the

bearing locknut [3712.2].
o) On grease lubricated pumps, pump grease

through the grease nipple in the bearing carrier

[3240] until grease is visible in the bearing races.
p) Check shaft [2100] for free rotation.

Page 26 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

2100

6570.2

3240

6570.3 6580.1

3200

0.5 to 2 mm

q) Install the shaft assembly into the bearing housing

[3200] until the gap is approximately 5 mm
(0.2 in.).

r) Fit the bearing carrier screws [6570.2] but do not

tighten.

s) Fit the labyrinth ring [4330] (if used) into the

bearing housing ensuring the drain hole faces the
bearing and is at the 6 o'clock position.

t) Press drive side liquid flinger [2540.1] and pump

side liquid flinger [2540.2] onto shaft where
applicable. These should be set 0.5 to 2 mm
(0.02 to 0.08 in.) (light contact for elastomer type)
from the bearing carrier and bearing housing
respectively.

u) The pump side flinger [2540.2] (this feature is

integral with some proprietary labyrinth seals)
should only be set in its final position after setting
the shaft axial position.

v) Temporarily fit the cover [1220]. The shaft [2100]

may now be positioned in relation to the cover
face, as shown below:

(0.02 to 0.08 in.)

6.10.2 Cover and seal assembly

a) Extreme cleanliness is required. The sealing

faces and shaft or sleeve surface must be free

from scratches or other damage.
b) Refer to section 6.11, Seal arrangements for seal

diagrams.
c) Carefully press the stationary seat into the cover

[1220], ensuring that the seating ring is not

deformed. Where an anti-rotation pin is fitted

ensure that correct engagement with the slot is

achieved.
d) Place any separate seal gland over the shaft.
e) Refer to manufacturer's instructions to position

the mechanical seal rotating elements. Tighten

any drive screws in the seal drive collar. For

precise compression most cartridge seals should

be set after complete pump assembly.
f) Fit the cover [1220] into the bearing housing

[3200] and tighten all fasteners.

6.10.3 Gland packing assembly

a) Assemble the gland packing [4130] into the cover

[1220] before fitting on to the shaft [2100].
b) Stagger the joints in the gland packing by 90

degrees to each other.
c) The lantern ring halves [4134], if required, should

be positioned mid-way along the packing.
d) Position the gland [4120] squarely against the last

ring and tighten the gland nuts finger-tight only.

Install into bearing housing assembly and fit the

two screws to hold the cover in place.
e) Check that the shaft rotates freely.

Bearing housing Dia. X mm (in.) Z mm (in.)

Frame 1 24 (0.945) 9 (0.354)
Frame 2 32 (1.260) 17 (0.669)
Frame 3 42 (1.654) 9 (0.354)
Frame 4 48 (1.890) 22 (0.866)

x) The pump side flinger [2540.2] may then be

moved towards the bearing housing and set with
its clearance.

Page 27 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

6.10.4 Impeller assembly and setting

6.10.4.1 Impeller assembly and setting

a) Fit a new O-ring [4610.1] into the impeller [2200]

using a small amount of grease to hold it in place.
Apply anti-galling compound (which does not
contain copper) to the impeller thread to help

subsequent removal.
b) Assemble impeller onto the shaft.
c) Tighten the impeller. Use the same method as in

disassembly but rotating in opposite direction. A

few sharp strikes will tighten it to the correct level.

6.10.4.2 Impeller assembly with key drive impeller

a) Fit a new impeller sealing gasket [4590.4] against

shaft shoulder.
b) Fit impeller key [6700.2].
c) Assemble impeller onto the shaft.
d) Fit a new O-ring [4610.5] into the impeller nut

[2912.1/2912.2] groove.
e) Apply anti-galling compound (which does not

contain copper) to the impeller nut threads to help

any subsequent removal.
f) Fit impeller nut onto the shaft and torque up.

6.10.5 Assembly of bearing housing into casing

a) Fit a new gasket [4590] into the casing [1100].

On the CPXR a new gasket is required

each side of the distance ring [2510.2].
b) Install the bearing housing assembly into the

pump casing. Coat the screws [6570.1] with anti-

galling compound and tighten into casing.
c) Check impeller front clearance against original

setting or process requirement and adjust as

necessary. (See section 6.7, Setting impeller

clearance.)
d) Ensure that all other items have been re-attached

and all fasteners tightened, then follow the

instructions in the sections on Installation and

Commissioning.

6.11 Sealing arrangements

The following section shows details of the seal
arrangements. The dimensions provided are for non­step balanced mechanical seals conforming to EN
12757 L1K and L1N. Contact your nearest Flowserve
sales office or service centre if you require further
information, such as a mechanical seal dimensional
drawing, or are unsure of the specific arrangement
supplied. Refer also to section 4.6.4, Auxiliary piping.

6.11.1 Single seal types

6.11.1a Single stepped balanced seal

6.11.1b Single unbalanced (or inherently
balanced) seal

Bearing housing

Frame 1 23.5 11.0
Frame 2 34.0 19.0
Frame 3 33.5 11.0
Frame 4 51.5 24.0

Setting dimension (mm)

X Y

6.11.1c Single seal with external neck bush

Q - Rp ¼ in. quench

D - Rp ¼ in. drain
F - Rp ¼ in. flush

Bearing housing

Frame 1 23.5 11.0
Frame 2 34.0 19.0
Frame 3 33.5 11.0
Frame 4 51.5 24.0

Setting dimension (mm)

X Y

Page 28 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

6.11.1d Single seal with external lip seal

Q - Rp ¼ in. quench
D - Rp ¼ in. drain
F - Rp ¼ in. flush
Z - Position of lip seal hard sleeve

NB: Lever flange away after fitting hard sleeve to shaft.

Bearing housing

Frame 1 23.5 11.0
Frame 2 34.0 19.0
Frame 3 33.5 11.0
Frame 4 51.5 24.0

Pump size

125 41.5 - - ­160 41.5 49.0 - ­200 36.5 49.0 - -

250 - 44.0 45.0 -

315 - 44.0 45.0 65.0
400 - - 36.5 57.0
500 - 44.0 45.0 65.0

Frame 1 Frame 2 Frame 3 Frame 4

Setting dimension (mm)

X Y

Setting dimension Z (mm)

6.11.1e Single internal seal with internal and
external neck bush

Q - Rp ¼ in. quench
D - Rp ¼ in. drain
F - Rp ¼ in. flush

EN12757 L1N

6.11.2 Cartridge seal types

6.11.2a Cartridge seal in conical cover

6.11.2b Hooked sleeve cartridge seal

For S see seal supplier's instructions.

6.11.3 Tandem seal types

6.11.3a Tandem seal with Flowserve eccentric
pumping annulus circulation

EN12757 L1K

Pump

size

125 12.5 0 - - - - - ­160 12.5 0 5.5 -9.5 - - - ­200 17.5 5.0 5.5 -9.5 - - - ­250 - - 10.6 -4.4 18.3 -4.3 - ­315 - - 10.6 -4.4 18.3 -4.3 -4.7 -32.3
400 - - - - 27.0 4.3 3.5 -24.0
500 - - 10.6 -4.4 18.3 -4.3 -4.7 -32.3

Frame 1 Frame 2 Frame 3 Frame 4

X Y X Y X Y X Y

Setting dimensions (mm)

BI - Rp ¼ in. barrier liquid inlet
BO - Rp ¼ in. barrier liquid outlet
F - Rp ¼ in. flush

Pump

size

125 20.0 31.5 - - - - - ­160 20.0 31.5 28.0 41.5 - - - ­200 20.0 26.5 28.0 41.5 - - - ­250 - - 28.0 36.4 27.5 33.7 - ­315 - - 28.0 36.4 27.5 33.7 45.5 56.7
400 - - - - 27.5 25.3 45.5 48.3
500 - - 28.0 36.4 27.5 33.7 45.5 56.7

Frame 1 Frame 2 Frame 3 Frame 4

X Y X Y X Y X Y

Setting dimensions (mm)

Page 29 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

4120

4130

4134

6.11.4 Double seal types

6.11.4a Double back-to-back seal with Flowserve
eccentric pumping annulus circulation

BI - Rp ¼ in. barrier liquid inlet
BO - Rp ¼ in. barrier liquid outlet

Pump size

125 11.0 - - ­160 11.0 17.5 - ­200 6.0 17.5 - ­250 - 12.4 14.4 ­315 - 12.4 14.3 32.3
400 - - 5.7 24.0
500 - 12.4 14.3 32.3

Setting dimension X (mm)

Frame 1 Frame 2 Frame 3 Frame 4

6.11.5 External seal types

6.11.5a External seal

D - drain

6.11.6 Packed gland seal types

6.11.6a Packed gland with fibre packing

F - Rp ¼ in. flush

Page 30 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

7 FAULTS; CAUSES AND REMEDIES

FAULT SYMPTOM
Pump overheats and sei zes

Bearings have short life

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump vibrates or is nois y

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal has s hor t life

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓






















































 

Mechanical seal leaks excessivel y

Pump requires excessi ve power

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump l oses prime a fter starting

⇓⇓⇓⇓

⇓⇓⇓⇓

Insuffi cient pressure de veloped

⇓⇓⇓⇓

⇓⇓⇓⇓

Insuffi cient capaci ty del ivered

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump does not deliver li quid

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

PROBABLE CAUSES POSSIBLE REMEDIES



Pump not primed or filled with liquid. Check complete filling.



Pump or suction pipe not completely filled with

 

liquid. (Where not a CPXP self priming
arrangement.)

 

Suction lift too high or level too low.



Insufficient margin between suction pressure and

 

vapour pressure.
Excessive amount of air or gas in liquid. Check and purge pipes and system.

 

Air or vapour pocket in suction line. Check suction line design for vapour pockets.





Air leaks into suction line. Check suction pipe is airtight.



Air leaks into pump through mechanical seal,



sleeve joints, casing joint or pipe lugs.



Foot valve too small. Investigate replacing the foot valve.





Foot valve partially clogged. Clean foot valve.



 

Inlet of suction pipe insufficiently submerged. Check out system design.



Speed too low. CONSULT FLOWSERVE.
Speed too high. CONSULT FLOWSERVE.
Total head of system higher than differential head

of pump.
Total head of system lower than pump design head.
Specific gravity of liquid different from design.
Viscosity of liquid differs from that for which

designed.
Operation at very low capacity.

Operation at high capacity.























  
























  



  

 

A. System troubles

Vent and/or prime.

Check NPSHA > NPSHR, proper submergence,
losses at strainers and fittings.

Check and replace faulty parts.
CONSULT FLOWSERVE.

Check system losses.
Remedy or CONSULT FLOWSERVE.

Check and CONSULT FLOWSERVE.

Measure value and check minimum permitted.
Remedy or CONSULT FLOWSERVE.

Measure value and check maximum permitted.
Remedy or CONSULT FLOWSERVE.

B. Mechanical troubles

     



    

Misalignment due to pipe strain.

Improperly designed foundation.

Shaft bent.

Check the flange connections and eliminate strains
using elastic couplings or a method permitted.

Check setting of baseplate: tighten, adjust, grout
base as required.

Check shaft runouts are within acceptable values.
CONSULT FLOWSERVE.

Page 31 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

FAULT SYMPTOM
Pump overheats and sei zes

Bearings have short life

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump vibrates or is nois y

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal has s hor t life

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

  

    






    

    



  







 



  

  

  



 

 

 

 



 

 

 

Mechanical seal leaks excessivel y

Pump requires excessi ve power

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump l oses prime a fter starting

⇓⇓⇓⇓

⇓⇓⇓⇓

Insuffi cient pressure de veloped

⇓⇓⇓⇓

⇓⇓⇓⇓

Insuffi cient capaci ty del ivered

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump does not deliver li quid

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

PROBABLE CAUSES POSSIBLE REMEDIES















 



 

Rotating part rubbing on stationary part internally. Check and CONSULT FLOWSERVE, if necessary.
Bearings worn Replace bearings.
Wearing ring surfaces worn. Replace worn wear ring/surfaces.

Impeller damaged or eroded.
Leakage under sleeve due to joint failure. Replace joint and check for damage.

Shaft sleeve worn or scored or running off centre. Check and renew defective parts.
Mechanical seal improperly installed.
Incorrect type of mechanical seal for operating

conditions.
Shaft running off centre because of worn bearings

or misalignment.
Impeller out of balance resulting in vibration.

Abrasive solids in liquid pumped.
Internal misalignment of parts preventing seal ring

and seat from mating properly.
Mechanical seal was run dry.

Internal misalignment due to improper repairs
causing impeller to rub.

Excessive thrust caused by a mechanical failure
inside the pump.

Excessive grease in ball bearings. Check method of regreasing.
Lack of lubrication for bearings.

Improper installation of bearings (damage during
assembly, incorrect assembly, wrong type of
bearing etc).

Damaged bearings due to contamination.

Replace or CONSULT FLOWSERVE for improved
material selection.

Check alignment of faces or damaged parts and
assembly method used.

CONSULT FLOWSERVE.
Check misalignment and correct if necessary. If

alignment satisfactory check bearings for excessive
wear.

Check and CONSULT FLOWSERVE.

Check mechanical seal condition and source of dry
running and repair.

Check method of assembly, possible damage or
state of cleanliness during assembly.
Remedy or CONSULT FLOWSERVE, if necessary.

Check wear condition of impeller, its clearances and
liquid passages.

Check hours run since last change of lubricant, the
schedule and its basis.

Check method of assembly, possible damage or
state of cleanliness during assembly and type of
bearing used. Remedy or CONSULT
FLOWSERVE, if necessary.

Check contamination source and replace damaged
bearings.

C. Motor electrical problems










 






 















Wrong direction of rotation. Reverse 2 phases at motor terminal box.



Motor running on 2 phases only. Check supply and fuses.





Motor running too slow. Check motor terminal box connections and voltage.



Page 32 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

8 PARTS LISTS AND DRAWINGS

8.1 CPX and CPXN

8.1.1 CPX sectional drawing

3013

6570.2

3240

3712.1

3855

6569.1

3856

3011

3200

6570.1

4590.1

1100

2510

2100

6700.1

2540.1

6570.3

6580.1

4610.2

6544

6570.4

3134

3712.2

8.1.2 CPX parts list

Item Description

1100 Casing
1220 Cover
2100 Shaft
2200 Impeller
2400 Sleeve *
2510 Distance ring

2540.1 Flinger (liquid)

2540.2 Flinger (liquid)
3011 Radial ball bearing
3013 Thrust ball bearing
3134 Support foot
3200 Bearing housing
3240 Bearing carrier

3712.1 Bearing locknut

3712.2 Bearing locknut
3855 Constant level oiler *
3856 Oil sight gauge
4200 Mechanical seal
4330 Labyrinth ring

6569.3

4330

2540.2

7450

4610.1

4200

2200

6569.2

4590.2

2400

1220

6580.2

6572

Drawing taken from B731/491, sheet 1, rev G

4590.1 Gasket

4590.2 Gasket *

4610.1 O-ring

4610.2 O-ring
6544 Circlip

6569.1 Plug (filler)

6569.2 Plug *

6569.3 Plug (magnetic)

6570.1 Screw

6570.2 Screw

6570.3 Screw

6570.4 Screw
6572 Stud

6580.1 Nut

6580.2 Nut

6700.1 Key
7450 Guard

Items not illustrated

3853.1 Grease nipples (grease lubrication only) *

3853.2 Grease nipples (grease lubrication only) *

* Standard option

Page 33 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

8.1.3 CPXN sectional drawing

8.1.4 CPXN parts list

Item Description

1100 Casing
1220 Cover
2100 Shaft
2200 Impeller

2540.1 Flinger (liquid)

2540.2 Flinger (liquid)
3011 Radial ball bearing
3013 Thrust ball bearing
3134 Support foot
3200 Bearing housing
3240 Bearing carrier

3712.1 Bearing locknut

3712.2 Bearing locknut
3855 Constant level oiler
3856 Oil sight gauge
4200 Mechanical seal

Drawing taken from C128/001, sheet 1, rev B

4330 Labyrinth ring
4590 Gasket

4610.1 O-ring

4610.2 O-ring
6544 Circlip

6569.1 Plug (filler)

6569.2 Plug (magnetic)

6570.1 Screw

6570.2 Screw

6570.3 Screw

6570.4 Screw
6572 Stud

6580.1 Nut

6580.2 Nut

6700.1 Key
7450 Guard

Items not illustrated

2400 Sleeve *

* Standard option

Page 34 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

Drawing taken from B731/724, rev E

8.2 CPXR

8.2.1 CPXR sectional drawing

6570.2

3013

3855

6569.1

3856

3011

3200

3240

3712.1

2100

6700.1

2540.1

6570.3

6580.1

4610.2

6544

6570.4

3134

6569.3

4330

7450

2540.2

6580.2

6752

2510.1

1220

6570.1

4590.1

2510.2

1100

4610.1

4200

2200

6569.2

4590.2

3712.2

8.2.2 CPXR parts list

Item Description

1100 Casing
1220 Cover
2100 Shaft
2200 Impeller

2510.1 Distance ring

2510.2 Distance ring

2540.1 Flinger (liquid)

2540.2 Flinger (liquid)
3011 Radial ball bearing
3013 Thrust ball bearing
3134 Support foot
3200 Bearing housing
3240 Bearing carrier

3712.1 Bearing locknut

3712.2 Bearing locknut
3855 Constant level oiler (oil lubrication only) *
3856 Oil sight gauge
4200 Mechanical seal
4330 Labyrinth ring

4590.1 Gasket

4590.2 Gasket *

4610.1 O-ring

4610.2 O-ring
6544 Circlip

6569.1 Plug (filler)

6569.2 Plug *

6569.3 Plug (magnetic)

6570.1 Screw

6570.2 Screw

6570.3 Screw

6570.4 Screw
6572 Stud

6580.1 Nut

6580.2 Nut

6700.1 Key
7450 Guard

Items not illustrated

2400 Sleeve *

3853.1 Grease nipples (grease lubrication only) *

3853.2 Grease nipples (grease lubrication only) *

* Standard option

Page 35 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

Drawing taken from C665/001, sheet 5, rev C

8.3 CPXP

8.3.1 CPXP sectional drawing

3011 3200

6569.4

6570.1

4590.1

1100

2510

6570.2

3240

3712.1

3013

3855

6569.1 3856

2100

6700.1

2540.1

6570.3

6580.1

4610.2

6544

6570.4

3712.2

3134

8.3.2 CPXP parts list

Item Description

1100 Casing
1220 Cover
2100 Shaft
2200 Impeller
2400 Sleeve *
2510 Distance ring

2540.1 Flinger (liquid)

2540.2 Flinger (liquid)
3011 Radial ball bearing
3013 Thrust ball bearing
3134 Support foot
3200 Bearing housing
3240 Bearing carrier
3712 Bearing locknut
3855 Constant level oiler *
3856 Oil sight gauge
4200 Mechanical seal
4330 Labyrinth ring

4590.1 Gasket

6569.3

4330

2540.2

7450

4610.1

4200

2200

6569.2

4590.2

24001220

6580.2

6572

4590.2 Gasket *

4610.1 O-ring

4610.2 O-ring
6544 Circlip

6569.1 Plug (filler)

6569.2 Plug *

6569.3 Plug (magnetic)

6569.4 Plug (filler)

6570.1 Screw

6570.2 Screw

6570.3 Screw

6570.4 Screw
6572 Stud

6580.1 Nut

6580.2 Nut

6700.1 Key
7450 Guard

Items not illustrated

3853.1 Grease nipples (grease lubrication only) *

3853.2 Grease nipples (grease lubrication only) *

* Standard option

Page 36 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

8.3.3 CPXP sizes with diffuser-casing

6570.5

1410

6570.1

4590.1

4590.3

6569.4

1100

8.3.4 CPXP diffuser casing parts list

Item Description

1100 Casing
1410 Diffuser

4590.1 Gasket

4590.2 Gasket

4590.3 Gasket

4610.3 O-ring

6569.2 Plug *

6569.4 Plug (filler)

6570.1 Screw

6570.5 Screw

* Standard option

4610.3

6569.2

4590.2

Drawing taken from C665/001, sheet 9, rev C

Page 37 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

8.4 CPX, CPXR, CPXN and CPXP
additional details

8.4.1 CPX, CPXR, CPXN and CPXP bearing
housing sealing details

Frame 1 and 2

8.4.2 CPX, CPXR, CPXN and CPXP key drive
impeller option

2100 2400 6700.2 2200 4610.5

4610.4

SLEEVED SHAFT
SHOWN ABOVE
CENTRE-LINE.

2912.1

(includes
heli-coil 6589)

SOLID SHAFT
SHOWN BELOW
CENTRE-LINE.

4590.4

Drawings taken from B731/1644, sheet 1, rev -

2912.2

6570.6

Frame 3 and 4

Frame 1 to 4 proprietary labyrinth/face seals (where fitted)

Key drive design for 304/316 stainless steel and

above, secure screw with PTFE sealant (Loctite 577)

Item Description

2100 Shaft
2200 Impeller
2400 Sleeve (if fitted)

2912.1 Impeller nut

2912.2 Impeller nut

4590.4 Gasket

4610.4 O-ring (if sleeve fitted)

4610.5 O-ring

6570.6 Screw

6700.2 Key

Page 38 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

8.5 Parts interchangeability

8.5.1 CPX parts interchangeability

Page 39 of 44 flowserve.com

CPX, CPXR, CPXN and CPXP USER INSTRUCTIONS ENGLISH 71569117 02-10

8.5.2 CPXP parts interchangeability

8.6 General arrangement drawing

The typical general arrangement drawing and any
specific drawings required by the contract will be sent
to the Purchaser separately unless the contract
specifically calls for these to be included into the User
Instructions. If required, copies of other drawings
sent separately to the Purchaser should be obtained
from the Purchaser and retained with these User
Instructions.

Page 40 of 44 flowserve.com

USER INSTRUCTIONS CPX, CPXR, CPXN and CPXP ENGLISH 71569117 10-09

9 CERTIFICATION

Certificates determined from the Contract requirements
are provided with these Instructions where applicable.
Examples are certificates for CE marking, ATEX
marking etc. If required, copies of other certificates sent
separately to the Purchaser should be obtained from
the Purchaser for retention with these User Instructions.

10 OTHER RELEVANT
DOCUMENTATION AND MANUALS

10.1 Supplementary User Instruction
manuals

Supplementary instruction determined from the contract
requirements for inclusion into User Instructions such as
for a driver, instrumentation, controller, sub-driver, seals,
sealant system, mounting component etc are included
under this section. If further copies of these are
required they should be obtained from the purchaser for
retention with these User Instructions.

Where any pre-printed set of User Instructions are
used, and satisfactory quality can be maintained only
by avoiding copying these, they are included at the
end of these User Instructions such as within a
standard clear polymer software protection envelope.

10.2 Change notes

If any changes, agreed with Flowserve Pump
Division, are made to the product after its supply, a
record of the details should be maintained with these
User Instructions.

10.3 Additional sources of information

Reference 1:

NPSH for Rotordynamic Pumps: a reference guide,
Europump Guide No. 1, Europump & World Pumps,
Elsevier Science, United Kingdom, 1999.

Reference 2:

Pumping Manual, 9th edition, T.C. Dickenson,
Elsevier Advanced Technology, United Kingdom, 1995.

Reference 3:
Pump Handbook, 2nd edition, Igor J. Karassik et al,
McGraw-Hill Inc., New York, 1993.

Reference 4:

ANSI/HI 1.1-1.5. Centrifugal Pumps - Nomenclature,
Definitions, Application and Operation.

Reference 5:

ANSI B31.3 - Process Piping.

Page 41 of 44 flowserve.com

Notes:

USER INSTRUCTIONS CPX, CPXR, CPXN and CPXP ENGLISH 71569117 10-09

Page 42 of 44 flowserve.com

Notes:

USER INSTRUCTIONS CPX, CPXR, CPXN and CPXP ENGLISH 71569117 10-09

Page 43 of 44 flowserve.com

USER INSTRUCTIONS CPX, CPXR, CPXN and CPXP ENGLISH 71569117 10-09

Your Flowserve factory contact:

Flowserve Pumps
Flowserve GB Limited
Lowfield Works, Balderton
Newark, Notts NG24 3BU
United Kingdom

Telephone (24 hours) [phone]
Sales & Admin Fax [phone]
Repair & Service Fax [phone]

Email [e-mail]

Your local Flowserve representative:

Flowserve Pompes
13 rue Maurice Trintignant
72234 Arnage Cedex
France

Telephone (24 hours) [phone]
Sales & Admin Fax [phone]
Repair & Service Fax [phone]

To find your local Flowserve representative please
use the Sales Support Locator System found at
www.flowserve.com

FLOWSERVE REGIONAL
SALES OFFICES:

USA and Canada

Flowserve Corporation
5215 North O’Connor Blvd.,
Suite 2300
Irving, Texas 75039-5421, USA
Telephone [phone]
Fax [phone]

Europe, Middle East, Africa

Worthing S.P.A.
Flowserve Corporation
Via Rossini 90/92
20033 Desio (Milan), Italy
Telephone [phone]
Fax [phone]

Latin America and Caribbean

Flowserve Corporation
6840 Wynnwood Lane
Houston, Texas 77008, USA
Telephone [phone]
Fax [phone]

Asia Pacific

Flowserve Pte. Ltd
10 Tuas Loop
Singapore 637345
Telephone [phone]
Fax [phone]