Flowserve CPXS User Manual

USER INSTRUCTIONS

CPXS, CPXNS and CPXPS

Installation

Operation

Frame mounted, modular design, centrifugal, chemical
process pumps with magnetic drive

PCN=71569250 07-11 (E) (Based on C957KH025 and
C957KH049.) Original instructions.

Maintenance

These instructions must be read prior to installing,

operating, using and maintaining this equipment.

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

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 ........................ 9

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........................................................ 11

2.5 Recycling and end of product life................ 11

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

3.1 Configurations.............................................12

3.2 Name nomenclature....................................12

3.3 Design of major parts..................................12

3.4 Performance and operating limits...............12

4 INSTALLATION................................................ 13

4.1 Location ......................................................13

4.2 Part assemblies ..........................................13

4.3 Foundation..................................................13

4.4 Grouting ......................................................13

4.5 Initial alignment...........................................13

4.6 Piping..........................................................14

4.7 Electrical connections .................................18

4.8 Final shaft alignment check ........................18

4.9 Protection systems......................................18

5 COMMISSIONING, START-UP, OPERATION

AND SHUTDOWN ...........................................19

5.1 Pre-commissioning procedure....................19

5.2 Pump lubricants ..........................................20

5.3 Open impeller clearance.............................21

5.4 Direction of rotation.....................................21

5.5 Guarding .....................................................21

5.6 Priming and auxiliary supplies....................21

5.7 Starting the pump........................................21

5.8 Running the pump.......................................22

5.9 Stopping and shutdown ..............................23

5.10 Hydraulic, mechanical and electrical duty ..23

6 MAINTENANCE............................................... 23

6.1 General.......................................................23

6.2 Maintenance schedule................................ 24

6.3 Spare parts.................................................. 25

6.4 Recommended spares................................ 25

6.5 Tools required ............................................. 25

6.6 Fastener torques......................................... 26

6.7 Setting impeller clearance .......................... 26

6.8 Disassembly ............................................... 26

6.9 Examination of parts...................................28

6.10 Magnets......................................................29

6.11 Assembly .................................................... 29

7 FAULTS; CAUSES AND REMEDIES .............. 32

8 PARTS LISTS AND DRAWINGS..................... 34

8.1 CPXS – frame mounted – coated shaft –

PEEK shell.................................................. 34

8.2 CPXS – frame mounted – sleeved shaft –

PEEK shell.................................................. 35

8.3 CPXS – frame mounted – coated shaft –

dual containment ........................................ 36

8.4 CPXS – frame mounted – sleeved shaft –

dual containment ........................................ 37

8.5 CPXS – frame mounted – coated shaft –

metal shell................................................... 38

8.6 CPXS – frame mounted – sleeved shaft –

metal shell................................................... 39

8.7 CPXPS – frame mounted – coated shaft –

PEEK shell.................................................. 40

8.8 CPXPS – frame mounted – sleeved shaft –

PEEK shell.................................................. 41

8.9 CPXPS - auxiliary connection points..........42

8.10 CPXS - parts interchangeability.................. 43

8.11 General arrangement drawing.................... 44

9 CERTIFICATION ............................................. 44

10 OTHER RELEVANT DOCUMENTATION AND

MANUALS ....................................................... 44

10.1 Supplementary User Instruction manuals... 44

10.2 Change notes ............................................. 44

10.3 Additional sources of information ............... 44

Page

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

INDEX

Page

Additional sources (10.3).........................................44

Alignment of shafting (4.3, 4.5 and 4.7)

Assembly (6.11).......................................................29

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

Bearing sizes and capacities (5.2)...........................20

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

Certification (9) ........................................................44

Change notes (10.2)................................................44

Clearances, impeller (6.7) .......................................26

Commissioning and operation (5)............................19

Compliance, ATEX (1.6.4.1)......................................6

Configurations (3.1) .................................................12

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

Design of major parts (3.3)......................................12

Direction of rotation (5.4) .........................................21

Disassembly (6.8)....................................................26

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

Dismantling (6.8, Disassembly)...............................26

Drawings (8) ............................................................34

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

Electrical connections (4.7) .....................................18

End of product life (2.5) ...........................................11

Examination of parts (6.9) .......................................28

Fastener torques (6.6) .............................................26

Faults; causes and remedies (7).............................32

Foundation (4.3) ......................................................13

General arrangement drawing (8.11) ...................... 44

General assembly drawings (8)...............................34

Grouting (4.4)........................................................... 13

Guarding (5.5).......................................................... 21

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

Hydraulic, mechanical and electrical duty (5.10).....23

Impeller clearance (5.3 and 6.7)

Inspection (6.2.1 and 6.2.2).....................................24

Installation (4) ..........................................................13

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

Location (4.1)...........................................................13

Lubrication (5.1.1, 5.2 and 6.2.3)

Lubrication schedule (5.2.3)....................................20

Magnets (6.10)......................................................... 29

Maintenance (6).......................................................23

Maintenance schedule (6.2)....................................24

Name nomenclature (3.2)........................................12

Nameplate (1.7.1)......................................................9

Operating limits (3.4.1) ............................................12

Ordering spare parts (6.3.1)....................................25

Page

Part assemblies (4.2)............................................... 13

Parts lists (8)............................................................ 34

Performance (3.4).................................................... 12

Piping (4.6) .............................................................. 14

Pre-commissioning (5.1) ......................................... 19

Priming and auxiliary supplies (5.6) ........................ 21

Protection systems (4.9).......................................... 18

Reassembly (6.11, Assembly)................................. 29

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

Recommended fill quantities (5.2.2)........................ 20

Recommended oil lubricants (5.2.1)........................ 20

Recommended spares (6.4).................................... 25

Recycling (2.5)......................................................... 11

Replacement parts (6.3 and 6.4)............................. 25

Running the pump (5.8)........................................... 22

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

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

Safety, protection systems (1.6 and 4.9)

Sectional drawings (8).............................................34

Setting impeller clearance (6.7)............................... 26

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

Sources, additional information (10.3)..................... 44

Spare parts (6.3)...................................................... 25

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

Starting the pump (5.7)............................................ 21

Stop/start frequency (5.8.3).....................................22

Stopping and shutdown (5.9) .................................. 23

Storage, pump (2.4)................................................. 11

Storage, spare parts (6.3.2) .................................... 25

Supplementary manuals or information sources.....44

Supplementary User Instructions (10.1).................. 44

Thermal expansion (4.5.1) ...................................... 13

Tools required (6.5) ................................................. 25

Torques for fasteners (6.6)......................................26

Trouble-shooting (7) ................................................ 32

Vibration (5.8.2).......................................................22

Safety labels (1.7.2)................................................... 9

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

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,
utilisng 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 mustread 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 complete and reliable. However, in spite of
all of the efforts of Flowserve Corporation to
provide comprehensive instructions, good
engineering and safety practice should always be
used.

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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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

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 seek
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 “strong magnetic
field” safety instructions where non-compliance would
affect personal safety, pacemakers, instruments, or
stored data sensitive to magnetic fields.

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

NEVER OPERATE THE PUMP WITHOUT
THE COUPLING GUARD AND ALL OTHER
SAFETY DEVICES CORRECTLY INSTALLED

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.

HIGH MAGNETIC FIELDS
Great care should be taken when assembling/
dismantling magnetic rotors, where fitted, because
of the very high forces which can be created by the
magnets.

Persons with pacemakers and any instrumentation
etc sensitive to magnetic fields should be kept well
away from the magnetic drive unit during
dismantling.

THERMAL SHOCK
Rapid changes in the temperature of the liquid within
the pump can cause thermal shock, which can result

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

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.

bearing housings must not be insulated and

drive motors and bearings may be hot.

If the temperature is greater than 80 ºC (175ºF) 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.

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 SPACER
PIECE REMOVED
Starting in reverse direction of rotation will damage the
pump.

NEVER EXCEED THE MAXIMUM
DESIGN PRESSURE (MDP) AT THE WORKING
TEMPERATURE OF THE PUMP NAMEPLATE

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.

DO NOT RUN THE PUMP AT
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.

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Temperature class

Temperature class

Where Flowserve has supplied only the bare shaft
pump, the Ex rating applies only to the pump. The party
responsible for assembling the ATEX 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. On
pumps sets controlled by 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.

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
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 temperature class and must not exceed the
values in the table that follows.

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

to EN13463-1

T6
T5
T4
T3
T2

Maximum surface

temperature permitted

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

Temperature limit of

liquid handled

Consult Flowserve
Consult Flowserve

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

Maximum permitted liquid temperature for
pumps with self priming casing

to EN13463-1

T6
T5
T4
T3
T2

* 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)

Temperature limit of

liquid handled

Consult Flowserve
Consult Flowserve

110 °C (230 °F) *
175 °C (347 °F) *
270 °C (518 °F) *

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.

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

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

Additional requirements for CPXPS pumps only

Where the system operation does not ensure control of
priming, as defined in the User Instructions, and the
maximum permitted surface temperature of the T Class
could be exceeded, the user shall 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. In addition it is essential to
make sure that 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 fro
category 2 equipment.

To avoid the potential hazard from random induced
current generating a spark, the baseplate must be
properly grounded.

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 an
external flush, the fluid must be monitored.

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

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.)

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.

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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

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.

Oil lubricated units only:

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 if required.

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.

For units driven by equipment other than
electric motors or units contained within enclosures,
see the accompanying information sheets and
manuals.

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.

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

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

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

Pump and

2 TRANSPORT AND STORAGE

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

motor

Pump

only

Pump and

motor

Pump

only

Pump and

2.3 Lifting

motor

Pump

only

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

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.

Slings, ropes and other lifting gear should be
positioned where they cannot slip and where a
balanced lift is obtained. The angle between two
load carrying slings or ropes must not exceed 60°

2.3.1 Bare pump

The bare pump should be lifted as shown:

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.

Pump and

motor

Page 10 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

2.3.2 Pump and folded steel, or polycrete
baseplate set

Where the baseplate is folded steel or polycrete
there are no specific lifting points provided for the
complete machine set. Any lifting points that can be
seen are provided only for dismantling parts for
servicing.

The pump and folded steel, or polycrete, baseplate
set should be lifted as shown. With a sling around
the pump discharge nozzle, and around the
outboard end of the motor frame using choker
hitches pulled tight. The sling should be positioned
so the weight is not carried through the motor fan
housing. Make sure the completion of the choker
hitch on the discharge nozzle is toward the
coupling end of the pump.

2.3.3 Pump and cast iron, or fabricated,
baseplate set

The pump and cast iron, or fabricated, baseplate
set which has specific lifting points, should be lifted
as shown:

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.

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

Page 11 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

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. For ultimate safety
the pump has been fitted with a magnetic drive.
(See 3.2 and 3.3 below.)

3.2 Name nomenclature

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

80-50CPXS200

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

guide to the CPXS 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 [1100] is designed with a
horizontal centreline end inlet and a vertical
centreline top outlet which makes it self venting.

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 CPXS and CPXPS the casing feet pads are
underneath the casing. On the CPXNS they are on
the shaft centreline.

In addition, the CPXPS pump casing [1100] is
designed with a self priming action which works on
the reflux principle for suction lifts up to 7 m (23 ft).

3.3.2 Impeller

An open impeller is fitted.

3.3.3 Shaft

The large diameter stiff shaft, mounted on
bearings, has a keyed drive end. The pump shaft
is fitted with a magnetic rotor and product
lubricated bearings.

3.3.4 Bearing housing

For oil lubricated bearings, a sight glass enables
the oil level to be viewed. Additional lubrication and
cooling options may be fitted.

3.3.5 Pump bearings and lubrication

The ball bearings fitted in the bearing housing may
be oil or grease lubricated. The magnetic drive
journal bearings may be lubricated by product or
from an external source.

3.3.6 Shaft seal

The magnetic drive design utilizes the shell
between the magnets to prevent leakage of the
pumped fluid.

3.3.7 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.

3.3.8 Accessories

Accessories may be fitted when specified by the
customer.

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 and
materials may influence this data. If required, a
definitive statement for your particular application
can be obtained from Flowserve.

3.4.1 Temperature limits

The pump materials and construction have been
selected for your application, however, the following
fundamental limits should not be exceeded:

Neodymium magnets -40 to +120 ºC
(-40 to +248 ºF)
Samarium cobalt magnets -40 to +250 ºC

(-40 to +482 ºF)

PEEK shell (depending on pressure)-40 to +120 ºC
(-40 to +248 ºF)

3.4.2 Ambient temperature

These pumps are generally fitted with TEFC motors
with an ambient temperature limit of +40 ºC
(104 ºF).
Specific pumps may be fitted with motors to suit
client's requirements with other ambient
temperature limits - see motor nameplate for
details.

Page 12 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

3.4.3 Operating limits

Maximum pump speed: refer to the nameplate.

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 re­shimming.

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. Fabricated steel, folded steel and cast iron
baseplates can be filled with grout. Polycrete
baseplates can not be grouted,see their User
Instructions 71569284 (E) for installation and use. 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.

Page 13 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

Angular

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.

Parallel

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.

When the electric motor has sleeve bearings it is
necessary to ensure that the motor is aligned to run
on its magnetic centreline. Refer to the motor
manual for details. A button (screwed into one of
the shaft ends) is normally fitted between the motor
and pump shaft ends to fix the axial position.

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

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.

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

Page 14 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

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.

Ensure piping for hazardous liquids is
arranged to allow pump flushing before removal of
the pump.

4.6.1.1 CPXS and CPXNS only

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

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 CPXPS 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:

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 has a disadvantage in that manual/
automatic control will be necessary during
operation to prevent continuous re-circulation of
the pumped liquid.

4.6.2 Suction piping

4.6.2.1 CPXS and CPXNS 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.

g) The pump is fitted with silicon carbide bearings

therefore small non-abrasive solids less than

0.3 mm (0.012 in.) in diameter can be handled
providing they constitute no more than 2.5% by
volume of liquid handled.

h) Solids must be non-magnetic, must not have a

tendency to coagulate and must not be fibrous.
They should also be non-abrasive and must
not scale wetted surfaces. For services other
than above you are recommended to contact
Flowserve for advice.

4.6.2.2 CPXPS 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) Take the suction lift into account in the available

NPSH, which must be higher than the required
NPSH of the pump.

d) Allow a minimum of two pipe diameters of

straight section between the elbow and inlet
flange.

e) Fitting an isolation valve will allow easier

maintenance.

Page 15 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

f) Never throttle pump on suction side and never

place a valve directly on the pump inlet nozzle.

g) The pump is fitted with silicon carbide bearings

therefore small non-abrasive solids less than

0.3 mm (0.012 in.) in diameter can be handled
providing they constitute no more than 2.5% by
volume of liquid handled.

h) Solids must be non-magnetic, must not have a

tendency to coagulate and must not be fibrous.
They should also be non-abrasive and must
not scale wetted surfaces. For services other
than above you are recommended to contact
Flowserve for advice.

4.6.3 Discharge piping

4.6.3.1 CPXS and CPXNS discharge piping

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.

Fitting an isolation valve will allow easier
maintenance.

4.6.3.2 CPXPS 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 explanders 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 Allowable Nozzle loads

The pump complies with ISO 5199 shaft deflection
limits for the following flange loads. The values are
presented in the ISO 5199/ISO 13709 (API 610)
format. Please note that the values permitted may
be higher or lower than those in ISO 5199; see
those specified for the actual pump size.

The values permitted for the pump with nozzle
(50mm and above) meet ISO 13709 (API610)
Table 4 values with grouted metallic baseplates.
Individual forces and moments up to twice ISO
13709 (API610) Table 4 values may be permitted

but only when applied in accordance with the
conditions in ISO 13709 (API610) Annex F.

Values are presented in compliance with the ISO
1503 sign convention.

All individual values which are greater than the
following values must be referred to Flowserve for
approval.

The values in the table on next page must be
multiplied by the following factors.

Liquid Temperature °C (°F)

Casing Material

Nickel 0.5 0.475 0.45

Austentic DCI,

Alloy 20,

Titanium &

Titanium Pd

All other CPX

materials

-20 to 100
(-4 to 212)

0.8 0.76 0.72

1 0.95 0.9

101 to 200

(213 to 392)

201 to 250

(393 to 482)

Page 16 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

4.6.4.1 Allowable nozzle loads

Forces are in N (lbf) Moments are in Nm (lbfft)

MAXIMUM FORCES AND MOMENTS ACTING SIMULTANEOUSLY

SIZE

40-25CPXS125

50-32CPXS125

65-40CPXS125

80-50CPXS125

32-20CPXS160

40-25CPXS160

50-32CPXS160

65-40CPXS160

80-50CPXS160

32-20CPXS200

40-25CPXS200

50-32CPXS200

65-40CPXS200

80-50CPXS200

100-65CPXS200

125-100CPXS200

40-25CPXS250

50-32CPXS250

65-40CPXS250

80-50CPXS250

100-65CPXS250

Mx My Mz Fx Fy Fz Mx My Mz Fx Fy Fz

840

(620)

930

(690)
1640

(1210)

1910

(1410)

470

(350)

840

(620)

930

(690)
1640

(1210)

1910

(1410)

470

(350)

840

(620)

930

(690)
1790

(1320)

1910

(1410)

2670

(1970)

4710

(3470)

840

(620)

930

(690)
1780

(1310)

1910

(1410)

2670

(1970)

450

(330)

470

(350)

820

(600)

960

(710)

240

(180)

450

(330)

460

(340)

820

(600)

960

(710)

340

(250)

450

(330)

470

(350)

860

(630)

960

(710)
1340

(990)
1560

(1150)

450

(330)

460

(340)

860

(630)

960

(710)
1340

(990)

Suction Discharge Suction Discharge

∑ M ∑ F ∑ M ∑ F

640

1800

1500

(470)

700

(520)
1230

(910)
1430

(1050)

350

(260)

640

(470)

700

(520)
1230

(910)
1430

(1050)

350

(260)

640

(470)

700

(520)
1220

(900)
1430

(1050)

2000

(1480)

3540

(2610)

640

(470)

700

(520)
1220

(900)
1430

(1050)

2000

(1480)

(400)
1780

(400)
2300

(520)
2680

(600)

890

(200)
1800

(400)
1800

(400)
2300

(520)
2680

(600)

890

(200)
1800

(400)
1800

(400)
2680

(600)
2680

(600)
3570

(800)
4140

(930)
1800

(400)
1800

(400)
2680

(600)
2680

(600)
3570

(800)

(340)
1430

(320)
1840

(410)
2140

(480)

710

(160)
1500

(340)
1500

(340)
1840

(410)
2140

(480)

710

(160)
1500

(340)
1500

(340)
2140

(480)
2140

(480)
2850

(640)
5020

(1130)

1500
(340)

1500
(340)

2140
(480)

2140
(480)

2850
(640)

1200

(270)

1160

(260)

1500

(340)

1740

(390)

(130)

1200

(270)

1200

(270)

1500

(340)

1740

(390)

(130)

1200

(270)

1200

(270)

1740

(390)

1740

(390)

2320

(520)

2690

(600)

1200

(270)

1200

(270)

1740

(390)

1740

(390)

2320

(520)

580

580

190

(140)

340

(250)

560

(410)

620

(460)

150

(110)

190

(140)

290

(210)

560

(410)

620

(460)

150

(110)

190

(140)

290

(210)

460

(340)

620

(460)
1210

(890)
2670

(1970)

190

(140)

290

(210)

500

(370)

720

(530)
1150

(850)

180

(130)

170

(130)

280

(210)

310

(230)

80

(60)
180

(130)

210

(150)

280

(210)

310

(230)

80

(60)
180

(130)

210

(150)

230

(170)

310

(230)

600

(440)

880

(650)

180

(130)

210

(150)

260

(190)

360

(270)

570

(420)

190

(140)

260

(190)

420

(310)

460

(340)

120
(90)

190

(140)

220

(160)

420

(310)

460

(340)

120
(90)

190

(140)

220

(160)

350

(260)

460

(340)

900

(660)
2000

(1480)

190

(140)

220

(160)

370

(270)

540

(400)

860

(630)

460

(100)

520

(120)

860

(190)

940

(210)

240
(50)

460

(100)

500

(110)

860

(190)

940

(210)

240
(50)

460

(100)

500

(110)

710

(160)

940

(210)
1350

(300)
1880

(420)

450

(100)

500

(110)

750

(170)
1100

(250)
1290

(290)

370
(80)

430

(100)

700

(160)

770

(170)

210
(50)

370
(80)

400
(90)

700

(160)

770

(170)

210
(50)

370
(80)

400
(90)

570

(130)

770

(170)
1100

(250)
2320

(520)

370
(80)

370
(80)

610

(140)

890

(200)
1040

(230)

580

(130)

660

(150)
1070

(240)
1150

(260)

310
(70)

580

(130)

590

(130)
1070

(240)
1150

(260)

310
(70)

580

(130)

590

(130)

880

(200)
1150

(260)
1690

(380)
3570

(800)

540

(120)

590

(130)

940

(210)
1370

(310)
1610

(360)

1140
(840)

1250
(920)

2200

(1620)

2570

(1900)

630

(460)
1140

(840)
1250

(920)
2200

(1620)

2570

(1900)

670

(490)
1140

(840)
1250

(920)
2330

(1720)

2570

(1900)

3590

(2650)

6090

(4490)

1140
(840)

1250
(920)

2320

(1710)

2570

(1900)

3590

(2650)

2630
(590)

2560
(580)

3300
(740)

3840
(860)

1270
(290)

2630
(590)

2630
(590)

3300
(740)

3840
(860)

1270
(290)

2630
(590)

2630
(590)

3840
(860)

3840
(860)

5120

(1150)

7040

(1580)

2630
(590)

2630
(590)

3840
(860)

3840
(860)

5120

(1150)

4.6.5 Auxiliary piping

4.6.6 Final checks

Check the tightness of all bolts in the suction and

The connections that are to be

piped up will have been fitted with protective metal

discharge pipework. Check also the tightness of all
foundation bolts.

or plastic plugs which will need to be removed.

320

(240)

460

(340)

750

(550)

830

(610)

200

(150)

320

(240)

420

(310)

750

(550)

830

(610)

200

(150)

320

(240)

420

(310)

620

(460)

830

(610)
1620

(1190)

3450

(2540)

320

(240)

420

(310)

670

(490)

960

(710)
1540

(1140)

820

(180)

940

(210)

1540

(350)

1670

(380)

440

(100)

820

(180)

870

(200)

1540

(350)

1670

(380)

440

(100)

820

(180)

870

(200)

1260

(280)

1670

(380)

2420

(540)

4650

(1050)

790

(180)

850

(190)

1340

(300)

1960

(440)

2310

(520)

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

4.7 Electrical connections

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.

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.

4.8 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.

4.9 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 install a protection
device 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, fit
a power monitor 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 system can
cause a hazard an appropriate leakage detection
system shall be installed.

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

Magnetic drive pumps are inherently safe and
are ideal for toxic, corrosive and highly volatile
liquids. However if abused and allowed to run dry,
for example, the consequences can be expensive
to repair. A few minutes dry running will cause
severe damage to the magnetic drive.

The main potential risks of failure are:
Dry running due to blocking of lubrication ports with

solids in pumped liquid.

1. Dry running due to loss of liquid to pump

suction.

2. Dry running due to impeller seizing, caused by

debris in the pump casing.

Dry running due to solidification of liquid in the

shell, eg due to poor control of temperature.

If any of these conditions occur, the system
must be switched off within one minute and the
most universal way of achieving this, for all the
above conditions, is by using a power or current
monitor fitted into the starter.

One other potential problem that can be monitored
when pumping hazardous fluids is leakage from the
shell.

In this instance the drive should be fitted with dual
containment and monitoring of the space between
the two shells can be carried out using a pressure
switch connected to either motor starter or alarm.

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If required, temperature of the liquid in the drive
and the metal shell (when single containment) can
also be monitored from the tapping points shown.

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, product lubrication etc.

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

Where an adjustable body Denco oiler is fitted this
should be set to the height shown in the following
diagram:

As each system has its unique requirements it is
recommended that Flowserve is consulted when
advice is required.

Auxiliary connection (Rp)

A G ¼ Bearing housing drain (plugged when provided)

B G ½ Casing drain (plugged when provided)
C Rp ⅜ Leakage (plugged when provided)
F Rp ⅜ External flush connection (plugged when provided)
H Rp ¼ Discharge gauge connection (plugged when provided)
J Rp ¼ Suction gauge connection (plugged when provided)

K G ½ Sight glass (when fitted)
L Rp ¼ Constant level oiler (when fitted)
V Rp ⅜ Fluid temperature connection (plugged when provided)

W Rp ⅜ Bearing housing vent (when provided)

Y1 Rp ½ Shell temperature connection (plugged as standard)
Y2 Rp ¼

Z Rp ½ Assembly access (plugged as standard)

Dual containment pressure connection (plugged
when provided)

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.

Oil lubricated units are supplied
without oil and must be filled to the marked level
before starting the pump.

To fill the bearing housing with oil, unscrew the oil
filler/breather and fill through the orifice.
Approximate oil volumes are shown in section

5.2.2, Bearing sizes and capacities.
Grease lubricated pumps and electric motors are

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

Where the ambient is very low special lubricants
are required. Refer to Flowserve when outside the
lubricant temperature range -5 to 82 ºC
(23 to 179 ºF). Where oil lubrication is utilized and
the ambient is less than -5 °C (23 °F) ensure the o il
pour point is at least 15 °C (27 °F) lower than the
ambient or use oil class SAE 5W-50 or API-SJ and
ensure the upper operating range of the oil is then
not exceeded. IS0 VG 46 oil is generally selected
for an initial lubrication schedule.

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.

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

5.2 Pump lubricants

5.2.1 Recommended oil lubricants

Oil Splash / force feed 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 very low pour point and good viscosity index which extend the minimum temperature
capability of the oil. Always check the grade capability where the ambient is less than -5 ºC (23 ºF).

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

LSO 32 (Synthetic oil)

32

-5 to 65 ºC

(23 to 149 ºF)

ISO VG 32

32 HLP

Energol HLP-HM 46

NUTO HP 32

ELFOLNA DS 32

Azolla ZS 32

LSO 46 (Synthetic oil)

Mobil DTE 24

Q8 Haydn 32

Shell Tellus 32

Rando HD 32

Wiolan HS32

Renolin CL 32

5.2.2 Bearing sizes and capacities

Model

80 6208C3 6208ZZ C3 0.235 (8.2)
100 6208C3 6208ZZ C3 0.235 (8.2)
150 6210C3 6210ZZ C3 0.430 (15.1)

Oil lubricated

bearings

Grease

lubricated

bearings

Oil capacity

(approx)

litres (fl. oz.)

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

Grease lubricated bearing housings are fitted with
"sealed for life" bearings.

5.2.3 Lubrication schedule

5.2.3.1 Oil lubricated bearings

Normal oil change intervals are 4 000 operating
hours or at least every 6 months. For pumps on hot
service or in severely damp or corrosive

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.

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.

5.2.3.2 Grease lubricated bearings

The bearings are sealed for life.

atmosphere, the oil will require changing more
frequently.

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

46

-5 to 78 ºC

(23 to 172 ºF)

ISO VG 46

46 HLP

NUTO HP 46

ELFOLNA DS 46

Azolla ZS 46

Mobil DTE 25
Q8 Haydn 46

Shell Tellus 46

Rando HD 46
Wiolan HS46

Renolin CL 46

68

-5 to 80 ºC

(23 to 176 ºF)

ISO VG 68

68 HLP

Energol HLP-HM 68

NUTO HP 68

ELFOLNA DS 68

Azolla ZS 68

LSO 68 (Synthetic oil)

Mobil DTE 26

Q8 Haydn 68

Shell Tellus 68

Rando HD 68

Wiolan HS68

Renolin CL 68

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

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 CPXS and CPXNS 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 CPXPS filling and self priming

Fill the pump with liquid to be
pumped, or compatible liquid, via the filling hole,
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.)

40-40CPXPS125 2.5 (0.65)
80-80CPXPS125 6.0 (1.60)
40-40CPXPS160 3.0 (0.80)
80-80CPXPS160 6.5 (1.75)
40-40CPXPS200 5.0 (1.30)
65-65CPXPS200 8.5 (2.25)
80-80CPXPS250 12.0 (3.20)

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 CPXS and CPXNS

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.

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g) Do not run the pump with the

outlet valve closed for a period longer than 30
seconds.

h) 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 CPXPS 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

5.6.1.) 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) 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 self prime 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 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 rise should then remain
constant or marginally reduce with time. Refer to
section 6.2.3.1 for further information.

5.8.2 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

Normal N
Alarm N x 1.25
Shutdown trip N x 2.0

Horizontal pumps

≤≤≤≤ 15 kW mm/sec

(in./sec) r.m.s.

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

5.8.3 Stop/start frequency

Pump sets are normally suitable for a number of
equally spaced stop/starts per hour. Generally six
stop/starts per hour may be satisfactory. Refer
frequent stop/starting to the motor manufacturer.

> 15 kW

mm/sec (in./sec)

r.m.s.

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

Check capability of the driver and control/starting
system before commissioning.
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.

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 cavitating. 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.

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.

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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.

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) Check bearing lubricant level, and if the hours

run show a lubricant change is required.

c) Check that the duty condition is in the safe

operating range for the pump.

d) Check vibration, noise level and surface

temperature at the bearings to confirm satisfactory
operation.

e) Check dirt and dust is removed from areas

around close clearances, bearing housings and
motors.

f) 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 the level and condition of oil lubricant.

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

c) When "sealed for life" bearings are fitted it is

recommended that they are renewed every
12 000 hours running life or every 2 years,
whichever is the sooner.

d) Check any auxiliary supplies eg heating/cooling

(if fitted) are functioning correctly.

Refer to the manuals of any associated

equipment for routine checks needed.

e) Pumps having ferrous wetted

components may rust internally if stood for
periods longer than say 2 weeks. In such cases
it is recommended that the pump shaft be turned
a few revolutions at least once a week to break
any rust or algae that may have built up in the
clearances between rotating parts. On units
where the shaft is accessible it may be turned
by hand. In other cases a flick of the starter is
permissible after ensuring that the pump casing
is full of liquid to prevent bearings etc running
dry.

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.

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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

Lubricant and bearing temperature analysis can be
useful in optimizing lubricant change intervals. In
general however, the following is recommended.

6.2.3.1 Oil lubricated bearings

Normal oil change intervals are 4 000 operating
hours or at least every six 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 oil having oxidisation and foam
inhibitors, or synthetic oil.

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,
indicate a fault.

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

6.2.3.2 Grease lubricated bearings

The bearings are sealed for life. It is recommended
that they are renewed every 12 000 hours running
life or every 2 years, whichever is the sooner.

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 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%

2100.1 Pump shaft 1 2 3 30%

3300.1 Bearing bush -

3300.2 Bearing bush -

241.1 Tolerance ring 4 8 12 120%
3400 Sleeve (if fitted) 2 4 6 60%
3610 Thrust collar 2 4 6 60%

4590.5

2923
3126 Shim pack 1 2 3 30%

220 Inner rotor 1 2 3 30%
230 Outer rotor 1 2 3 30%

224.1 or

224.2
3011 Ball bearing 2 4 6 60%

4590.1 Casing gasket 4 6 8 9 10 100%

4590.2 &
4610

4590.3 and

4590.4
252 Skid ring (if

Note 1: [224.1] PEEK (polymer). [224.2] metallic.
Note 2: [4590.2] gasket. [4610] secondary O-ring (if fitted).

front

rear

Gasket - thrust
collar

Drive pin - thrust
collar

Shell
(see note 1)

Shell O-ring set
(see note 2)

Remaining
gasket set

fitted)

Number of pumps

(including stand-by)

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

1 2 3 30%

1 2 3 30%

4 8 12 120%

4 8 12 120%

1 2 3 30%

2 3 4 5 6 60%

1 2 3 30%

1 2 3 30%

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 48
screws

• Allen keys, up to 10 mm (A/F)

• Range of screwdrivers

• Soft mallet

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

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.) Order as follows:
Part no. N.919GZ172 for Model 80 units.
Part no. N.919GZ173 for Model 100 and 150
units.

6.6 Fastener torques

Screw size Torque Nm (lbf•ft)

M 6

M 8
M 10
M 12
M 16
M 20

Inner rotor locknut

[6580]

Model 80 70 (53)
Model 100 100 (74)
Model 150 150 (110)

11 (8)
16 (12)
25 (18)
35 (26)
80 (59)

130 (96)

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

Torque up bolts crosswise on all bolting

patterns, DO NOT torque in a circle

6.7 Setting impeller clearance

This procedure may be required after the pump has
been dismantled or a different clearance is
required.
a) Position the pump casing [1100] with the

suction flange facing down on the bench.

b) Install the casing gasket [4590.1] followed by

the inner rotor/casing cover assembly.
c) Tighten the casing bolts [6570.2].
d) Locate a dial indicator on top of the pump shaft

[2100.1] to enable its vertical movement to be

recorded.

e) Loosen inner rotor locknut [6580] and record

shaft drop when the impeller touches the pump
casing. This is a measure of the current front
clearance. Check 3 times at 120 degree
intervals and record the smallest value.

f) Record this reading on line 1 below. Subtract

gasket compression factor - 0.15 mm (0.006
in.) and record on line 3 below:

Line Detail mm (in.)

1 Shaft drop
2 Gasket compression factor 0.15 (0.006)
3 Line (1 - 2)
4 Design front clearance
5 Shim adjustment required (3 - 4)

g) Subtract the design front clearance from the

total shaft drop recorded in line 3 to arrive at
the shim adjustment.

IF POSITIVE - ADD SHIMS
IF NEGATIVE - SUBTRACT SHIMS

Design front clearances are:

Impeller diameters up to 210 mm inclusive 0.3 mm (0.012 in.)
Impeller diameters 211 mm to 254 mm 0.4 mm (0.016 in.)

h) Re-install the inner rotor and tighten up the

locknut in accordance with torques shown in
section 6.6.

i) Check axial float is between 0.5 and 1.5 mm

(0.02 and 0.06 in.).

6.8 Disassembly

Refer to Safety section before dismantling the

pump.

Before dismantling the pump for
overhaul, ensure genuine Flowserve replacement
parts are available.

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

Refer to section 6.5, Tools required for instruments
needed during dismantling and assembly
procedures. These tools are not supplied with the
pump but can be ordered from Flowserve if
required.

The "back pullout" design of these units enables
the pump casing [1100] to be left in line. The outer
assembly or inner assembly can be removed
without disturbing the pump end thus allowing
examination of the outer rotor and bearing housing
ball bearings.

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

6.8.1 General

a) Lock and tag power source.
b) Ensure the work area is clean of grease, oil

and metallic chips or dust. Ferritic dust will
attract to magnetic assemblies.

c) Drilling, grinding or machining should NOT be

attempted near the work area.

d) The dismantled magnet

assemblies [220 & 230] have a very strong
attraction. They should be handled separately
at a safe distance from each other and stored
in a clean area.

6.8.2 Dismantling frame mounted outer
assembly

a) Loosen the bearing housing footbolts.
b) Remove the 4 bolts [6570.3] holding the

bearing housing to the casing cover.

c) Insert 2 bolts into the threaded holes in the

bearing housing flange.

• M14 x 60 mm for Model 80

• M14 x 75 mm for Model 100

• M12 x 140 mm for Model 150

d) Alternately jack the bolts into the flange,
32 mm (1.25 in.) for frame 80
53 mm (2.1 in.) for frame 100
105 mm (4.1 in) for frame 150.

This will release the outer rotor from the flux of
the inner rotor.

e) Slide the outer assembly [230] out past the shell

assembly.

f) Secure the outer assembly in a horizontal

position.

g) Using a dial indicator, determine the play of the

outer magnet carrier within the bore. If there is
contact between the outer carrier and the skid ring
[252], (if fitted), then the ball bearings [3011.1 & 2]
need to be replaced.

h) The nominal diametral clearance of the outer

rotor to the skid ring is 1 mm (0.04 in.)

6.8.3 Removing outer rotor

a) The outer rotor is removed by first removing

the pipe plug from the side of the housing.

b) Rotate the outer rotor so that its 14 mm

diameter hole aligns with the plug hole. Insert
a bar or screw into the hole provided in the
bearing housing and outer rotor to lock the
rotor.

c) Place a coupling hub and key onto the shaft

coupling end and loosen the outer magnet
assembly [230].

Outer rotor is right hand thread.

d) Continue to unscrew and remove the outer

rotor from the large bore of the bearing
housing.

e) Scuff marks on the skid ring [252] can be

removed with a light file.

f) If the skid ring has excessive scuffing, it can be

removed by first sawing a small cut in the ring,
horizontally. Then place the end of a chisel
under the outer diameter and tap one side of
the cut up and over the other side. Continue

hammering inwardly until the ring comes loose.
g) Clean the groove into which the skid ring fits.
h) Remove the four screws [6570.4] fastening the

bearing end cover [3260] to the bearing

housing face. Remove cover and gasket

[4590.4].
i) Slide the bearing shaft assembly out of the

bearing housing.

j) Inspect both inboard [3011.1] and outboard

[3011.2] ball bearings. Replace as necessary.

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

6.8.4 Dismantling casing cover assembly

a) Loosen and remove the screws [6570.2]

holding the casing [1100] and casing cover
[1220] assembly together.

b) Pull the casing cover assembly out of the

casing and secure horizontally in a vice. On
some of the heavier assemblies it is advisable
to fit two studs into the top two holes in the
casing to temporarily support the casing cover,
whilst getting a firm grip.

c) Remove the 6mm hexagon socket head

containment shell capscrews [6570.1] and
washers.

d) Remove the containment shell(s) [224s] and

containment shell gasket [4590.2]. Discard the
gasket (and O-ring [4610] if dual containment).

e) Loosen and remove the locknut [6580] using

the appropriate socket and spanner wrench
pair.

Locknut has left hand thread.
A handle extension may be required. See
section 6.5, Tools required, for proper sizes.

l) Loosen impeller [2200] using a strap wrench or

similar.

Right hand thread.)

m) Inspect BOTH sleeve bearing-bushings [3300s]

in the casing cover. Polishing in the bores and
thrust faces is normal. No removal is required.

n) If either bushing [3300s] appears to be

cracked, chipped or severely worn, remove by
laying the casing cover flat face uppermost.

o) Remove two setscrews [6570.6], if fitted. (See

drawings in section 8.5 and 8.6.)
p) Using an arbor, press out the bushings.
q) Remove tolerance rings [241s] and discard.
r) Remove the thrust collar [3610] from the inner

magnet rotor. The collar is a loose fit in the

carrier bore.
s) Remove the thrust collar gasket [4590.5], discard

and replace.

6.9 Examination of parts

Frame 80 Frame 100 & 150

When removing the shaft nut,

residual fluid may be in the undercut.

f) Rotate the inner rotor so that the shaft key

[6700.2] is at 12 o'clock position. Slide the
assembly [220] off the pump shaft and place in a
clean, non-ferrous area.

g) Remove the inner magnet assembly[220], key

[6700.2] and shims [3126] from the shaft.

h) Slide the shaft [2100.1], complete with impeller

[2200], out of the casing cover [1220].

i) Inspect the coated surface of the shaft, or sleeves

[3400], if fitted. If damaged, it should be
replaced.

j) The impeller/shaft assembly may now be

disassembled after first removing the sleeves
and spacer [2460.1], if fitted.

k) Secure the pump shaft [2100.1] in a vice in the

vertical position using soft jaws with a pin
through the bypass holes. Care must be
exercised so that the coating is not damaged.

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.

THE MAGNETS MUST BE KEPT AT A
SAFE DISTANCE FROM OTHER PARTS AND
TOOLS.

a) Clean the internal pump parts thoroughly.
b) Inspect for excessive wear, pitting, corrosion,

erosion or damage and any sealing surface
irregularities. Replace as necessary.

c) For units equipped with a wash flow strainer,

be sure to clean the filter removing any debris
that may be blocking the strainer holes.

d) Clean lubrication holes in the casing cover

[1220], inner magnet carrier [220] and shaft
[2100.1].

e) On the casing cover, inspect the injection, vent,

drain and return holes. Clean if necessary.

f) The balance holes of the inner rotor should

also be inspected and cleared of any debris.

g) Replace all gaskets [4590s] and O-rings

[4610s].

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

h) Ensure all lubrication passageways in the

bearing housing are clean and free from
damage.

i) Check the driver manufacturer's instructions.

As a minimum, check the bearings and shaft
for straightness.

j) The lubricant, bearings and bearing seals in

the motor should be inspected for
contamination and damage.

6.10 Magnets

Demagnetization of the magnet material can be the
result of either high operating temperatures around
the magnet assemblies or decoupled magnets
operating around a metallic containment shell.

High ambient temperatures are detrimental to the
attraction properties of the magnets.

The inner magnet assembly is most susceptible to
high operating temperatures and cannot tolerate
operation above its upper critical temperature limit.

If decoupling has occurred or if a system
upset has caused the temperature limits to be
exceeded, the original strength of the magnets may
have decreased. The following torque test
procedure should be followed in such a situation.

6.10.1.1 Magnet torque test procedure

a) Remove the casing [1100] from the pump.
b) Secure the bearing housing on a stable

worktable.

c) Lock the outer rotor assembly [230] in position.

Insert bolt in assembly hole.

d) Remove the impeller [2200] by using a strap

wrench around the periphery of the impeller.
Turn counterclockwise.

e) Install a shaft adapter on the shaft [2100.1]

threaded connection.

• Models 80 and 100 M22 -1.5 pitch

• Model 150 M30 -1.5 pitch

f) Use a torque wrench on the shaft adapter nut

and turn clockwise to measure the force
required to break the magnetic coupling.
Adjust the wrench setting such that the torque
value is determined prior to breaking the
magnetic couple. This is the torque capability
of the magnetic coupling.

Factory torque specification

Model Series

80 8 13 (9.6) 11 (8.1)

80 15 27 (20) 24 (17.7)
100 25 45 (33) 40 (29.5)
100 50 90 (66) 80 (59)
150 50 80 (59) 70 (51.5)
150 100 160 (118) 140 (103)
150 150 240 (177) 210 (154.5)

Minimum torque Nm (lbf•ft)

Neodymium Samarium cobalt

6.11 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.

6.11.1 Outer assembly - bearing housing
assembly

a) If removed, replace the skid ring [252].
b) If the radial ball bearings [3011s] are found to

be damaged, remove the damaged ones and
press two new bearings onto the shaft.

Be sure to press on only the inner
race of the bearing whilst pressing it onto the
shaft [2100.2]. Press bearings up to the shaft
shoulders.

c) Install the bearing/shaft assembly into the bore

of the bearing housing [3200].

d) Seat the end cover gasket [4590.4].
e) Bolt bearing end cover [3260] to bearing

housing face with screws [6570.4].

Be sure that the oil return grooves on
the gasket and end cover line up.

f) Tighten screws crosswise to 13 Nm (9.6 lbf•ft)

torque.

g) Turn the shaft coupling end to ensure freedom

of rotation.

h) Install the flinger [2540] over the shaft.

Be sure that the flinger is not pressed
down hard against the bearing end cover.

i) Position the bearing housing [3200]

horizontally.

j) Coat the outer magnet rotor threads with anti-

seize compound.

k) Insert outer magnet rotor [230] into the large bore

of the bearing housing and screw onto the frame
shaft.

Right hand thread.

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

l) Insert a bar or screw into the holes provided in

the bearing housing and outer rotor to lock the
rotor.

m) Place a coupling hub and key onto the shaft

[2100.2] coupling end and torque the outer
magnet assembly crosswise to 54 Nm (40
lbf•ft).

n) Remove the bar or screw and check shaft for

freedom of rotation.

o) Re-install the pipe plug.

6.11.2 Inner assembly - casing cover assembly

a) If the sleeve bearing bushings [3300s] were not

removed during dismantling, proceed to Rotor
assembly, section 6.11.3.

b) The inboard tolerance ring [241.1] must be

trimmed to length using tin snips. This is due to
the difference in diameter of the two bushings.
Trim off three corrugations prior to placement in
the casing cover [1220].

c) There must be a minimum gap of 1.5 mm (0.06

in.) between the cut ends of the tolerance ring
before assembly of bushes.

d) Install the cut tolerance ring into the inner bore.

Rotate the ring to guarantee it is

secure.

e) Position the casing cover with "top" designation

at 12 o'clock position.

f) Insert the front bearing bushing [3300.1] so that

the lubrication groove is at a 9 o'clock position.
The face with the white spot should be visible.
The opposite face is lapped and should locate
against the shoulder in the casing cover.

g) Press in the front bearing bushing up to the

shoulder in the casing cover.
h) Fit bearing bush spacer [2460.2] (if appropriate).
i) Insert the second tolerance ring [241.2], rotating it

for a secure fit.
j) Insert rear bearing bushing [3300.2] until

resistance is felt.
k) Position the bushing so that one lubrication

groove is at the 6 o'clock position and press in

up to the shoulder in the casing cover. The

face with the white spot should mate up to the

shoulder in the casing cover.
l) If a bearing bush spacer has been fitted, secure

with two radial socket head setscrews [6570.2].

6.11.3 Rotor assembly

a) Thoroughly clean and degrease impeller and

shaft threads.
b) Install the impeller [2200] on the pump shaft

[2100.1], after first applying anti-seize

compound (which does not contain copper) at

the impeller to shaft thread to assist in
subsequent removal.

c) Secure the pump shaft in a vice in the vertical

position using soft jaws with a pin through the
bypass holes. Care must be exercised so that
the coating is not damaged.

d) Tighten the impeller using a strap wrench or

similar.

e) If fitted, slide sleeves [3400] and spacer

[2460.1] onto shaft.

f) Position the casing cover [1220] upright with

the through bore in the horizontal plane and
"TOP" designation at 12 o'clock.

g) Slide the shaft [2100.1] through the casing

cover.

h) Diametral journal bearing clearances are 0.08

to 0.13 mm (0.003 to 0.005 in.). Extreme care
must be exercised.

i) Place the thrust collar gasket [4590.5] into the

inner rotor.

j) Make sure it is fitted over the drive pin [2923],

which should be replaced if damaged.

k) If a new pin is fitted it must be ensured it does

not protrude more than 3 mm (0.12 in.) from
inner rotor face. The top of the pin should not
foul the silicon carbide thrust face. Shorten if
necessary.

l) Install the thrust collar [3610] into the inner rotor.

Be sure that the slot in the thrust collar is in
alignment with the drive pin. Small spots of
grease may be used to hold the gasket and collar
in place, if necessary.

m) Install 0.8 mm (0.032 in.) shim [3126] on the

pump shaft, between inner rotor and shaft

shoulder.
n) Install the inner rotor key [6700.2].
o) Slide the inner rotor [220] onto the shaft -pump

end.
p) Thread the locknut [6580] onto the shaft-pump

end.

Left hand threads.

q) Check the setting of impeller clearance, see

section 6.7, Setting of the impeller clearance.

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

r) Tighten the locknut and torque up to the values

given in section 6.6.

6.11.4 Containment shell assembly - single
containment metallic shell

a) Install the containment shell gasket [4590.2 ]in

the groove in the casing cover [1220].
b) Install the metallic shell [224.2].
c) Install the backing ring [1240].
d) Install and tighten the 6 mm capscrews

[6570.1] to 11 Nm (8 lbf•ft). Torque screws

crosswise.

6.11.5 Containment shell assembly - single

containment PEEK shell

a) Install the containment shell gasket [4590.2] in

the groove in the casing cover [1220].
b) Install shell [224.1] with slotted temperature tap

as shown.

Slotted tap for
temperature monitoring

c) Install and tighten the 6 mm capscrews and

washers [6570.1] to 11 Nm (8 lbf•ft). Torque

screws crosswise

It is important that washers are not
omitted otherwise excessive damage to PEEK
shell flange will occur.

6.11.6 Containment shell assembly - dual
containment

a) Install the containment shell gasket [4590.2] in

the groove in the casing cover [1220].
b) Install the metallic shell [241.2].
c) Install dual containment O-ring [4610].
d) Install PEEK shell [241.1] with pressure tap as

shown.

e) Install and tighten the 6 mm capscrews and

washers [6570.1] to 11Nm (8 lbf•ft). Torque up
screws crosswise.

It is important that washers are not
omitted otherwise excessive damage to PEEK
shell flange will occur.

6.11.7 Final bearing housing assembly

a) Install the 2 jack bolts, (previously used for

disassembly), into the bearing housing [3200]
and thread in until they extend as follows:

• Model 80 26 mm (1.0 in.)

• Model 100 45 mm (1.75 in.)

• Model 150 95 mm (3.75 in.)

b) It is recommended that a liquid sealant,

Hylomar Universal Blue or equivalent, is
applied between the bearing housing and
casing cover. [4590.3] on sectional
arrangement refers.

c) Position the outer assembly [230] over the shell

until the jacking screws rest against the casing
cover [1220].

d) Back out the jack screws ALTERNATELY,

ensuring spigot between casing cover and
bearing housing is fully located and square.

e) Remove the jacking bolts.
f) Install the four bearing housing to cover bolts

[6570.3] and torque crosswise to 54 Nm (40
lbf•ft).

g) Tighten the foot bolt(s) [6570.5].
h) Re-check the frame shaft [2100.2] for freedom

of rotation.

i) Install the coupling.
j) Align the coupling. (See section 4.5, Initial

alignment.)

k) Ensure that all other items have been re-

attached and all fasteners tightened, then
follow the instructions in the Installation
sections.

Threaded tap for dual containment
pressure monitoring

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CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

7 FAULTS; CAUSES AND REMEDIES

FAULT SYMPTOM
Pum p overheats and s ei zes

Bearings ha ve short lif e

⇓⇓⇓⇓

⇓⇓⇓⇓

Pum p vi br ates or is noisy

⇓⇓⇓⇓

⇓⇓⇓⇓

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B. Mechanical troubles

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Pum p re quires e xc es si ve pow er

Pum p loses prime aft er s tarting

Insufficien t pressure dev elop ed

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficien t capacity deli vered

⇓⇓⇓⇓

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Pum p does not deliver liq uid

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POSSIBLE CAUSES POSSIBLE REMEDIES

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 





Pump not primed.
Pump or suction pipe not completely filled with

liquid.
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 casing and pipework

gaskets.
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 or pump run dry.

Operation at high capacity.

Misalignment due to pipe strain.

Improperly designed foundation.

Shaft bent.

A. System troubles

Check complete filling. 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.

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 32 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

FAULT SYMPTOM
Pum p overheats and s ei zes

Bearings ha ve short lif e

⇓⇓⇓⇓

⇓⇓⇓⇓

Pum p vi br ates or is noisy

⇓⇓⇓⇓

⇓⇓⇓⇓

   

  





  

  

Pum p re quires e xc es si ve pow er

Pum p loses prime aft er s tarting

Insufficien t pressure dev elop ed

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficien t capacity deli vered

⇓⇓⇓⇓

⇓⇓⇓⇓

Pum p does not deliver liq uid

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

POSSIBLE 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.

Shell O-ring/casing gasket failure.
Magnetic coupling de-coupled. CONSULT FLOWSERVE to determine the cause.
Shell corroded/eroded through

Shaft running off centre because of worn bearings
or misalignment.

Impeller out of balance resulting in vibration. Check and CONSULT FLOWSERVE.

Replace or CONSULT FLOWSERVE for improved
material selection.

Replace with care or CONSULT FLOWSERVE for
improved material selection.

Replace or CONSULT FLOWSERVE for improved
material selection.

Check misalignment and correct if necessary. If
alignment satisfactory check bearings for excessive
wear.

 



C. Motor electrical problems















 









Pump 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.

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.

Improve control on pump to prevent recurrence or
CONSULT FLOWSERVE for advice.

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.

Page 33 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

3855

6569.1 6580 6700.2 3126 4590.5 3610

252 6570.2 1220

3134 6569.2 224.1 6569.3 2923 220 230 241.2

6570.1 4590.3 4590.2 4590.1 241.1 3300.1

8 PARTS LISTS AND DRAWINGS

8.1 CPXS – frame mounted – coated shaft – PEEK shell

3200

4590.4

3260

6570.4

2540

6700.1

2100.2

3011.1

3856

6570.5

1100

2200

2100.1

3300.2

6569.4

Item Description

220 Magnet assembly (inner)

224.1 Containment shell
230 Magnet assembly (outer)

241.1 Tolerance ring

241.2 Tolerance ring
252 Skid ring *

1100 Casing
1220 Cover

2100.1 Shaft (pump)

2100.2 Shaft
2200 Impeller
2540 Flinger (liquid)
2923 Pin

3011.1 Radial ball bearing

3011.2 Radial ball bearing
3126 Shim (pack)
3134 Support foot
3200 Bearing housing
3260 Bearing cover

3300.1 Bearing bush

3300.2 Bearing bush

3610 Thrust collar
3855 Constant level oiler *
3856 Oil sight gauge *

4590.1 Gasket

4590.2 Gasket

4590.3 Gasket

4590.4 Gasket

4590.5 Gasket

6569.1 Plug (filler) *

6569.2 Plug (magnetic) *

6569.3 Plug *

6569.4 Plug (casing drain)

6570.1 Screw (with washer)

6570.2 Screw

6570.3 Screw **

6570.4 Screw

6570.5 Screw
6580 Nut (rotor)

6700.1 Key

6700.2 Key

* When supplied. ** Not shown.

CPXNS CASING HAS CENTRE-LINE MOUNTING FEET

Page 34 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

3855 6569.1 6580 6700.2 3126 4590.5 3610 3400

2460

.1 25

2 6570.2 1220

3134 6569.2 224.1 6569.3 2923 220 230 241.2 6570.1 4590.3 4590.2 4590.1 241.1 3300.1

8.2 CPXS – frame mounted – sleeved shaft – PEEK shell

3200

4590.4

3260

6570.4

2540

6700.1

2100.2

3011.1

3856

6570.5

Item Description

220 Magnet assembly (inner)

224.1 Containment shell
230 Magnet assembly (outer)

241.1 Tolerance ring

241.2 Tolerance ring
252 Skid ring *

1100 Casing
1220 Cover

2100.1 Shaft

2100.2 Shaft
2200 Impeller

2460.1 Spacer sleeve (shaft)
2540 Flinger (liquid)
2923 Pin

3011.1 Radial ball bearing

3011.2 Radial ball bearing
3126 Shim (pack)
3134 Support foot
3200 Bearing housing
3260 Bearing cover

3300.1 Bearing bush

3300.2 Bearing bush

3400 Bearing sleeve
3610 Thrust collar
3855 Constant level oiler *
3856 Oil sight gauge *

4590.1 Gasket

4590.2 Gasket

4590.3 Gasket

4590.4 Gasket

4590.5 Gasket

6569.1 Plug (filler) *

6569.2 Plug (magnetic) *

6569.3 Plug *

6569.4 Plug

6570.1 Screw (with washer)

6570.2 Screw

6570.3 Screw **

6570.4 Screw

6570.5 Screw
6580 Nut (rotor)

6700.1 Key

6700.2 Key

* When supplied. ** Not shown.

CPXNS CASING HAS CENTRE-LINE MOUNTING FEET

3400

1100

2200

2100.1

3300.2

6569.4

Page 35 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

3134 6569.2 224.1 224.2 6569.3 2923 220 230 241.2 6570.1 4590.3

4610 4590.2 4590.1 241.1 3300.1

3855 6569.1 6580 6700.2 3126 4590.5 3610 252 6570.2 1220

8.3 CPXS – frame mounted – coated shaft – dual containment

3200

4590.4

3260

6570.4

2540

6700.1

2100.2

3011.1

3856

6570.5

1100

2200

2100.1

3300.2

6569.4

Item Description

220 Magnet Assembly (inner)

224.1 Containment shell

224.2 Containment shell
230 Magnet assembly (outer)

241.1 Tolerance ring

241.2 Tolerance ring
252 Skid ring *

1100 Casing
1220 Cover

2100.1 Shaft

2100.2 Shaft
2200 Impeller
2540 Flinger (liquid)
2923 Pin

3011.1 Radial ball bearing

3011.2 Radial ball bearing
3126 Shim (pack)
3134 Support foot
3200 Bearing housing
3260 Bearing cover

3300.1 Bearing bush

3300.2 Bearing bush

3610 Thrust collar
3855 Constant level oiler *
3856 Oil sight gauge *

4590.1 Gasket

4590.2 Gasket

4590.3 Gasket

4590.4 Gasket

4590.5 Gasket
4610 O-ring

6569.1 Plug (filler) *

6569.2 Plug (magnetic) *

6569.3 Plug *

6569.4 Plug

6570.1 Screw (with washer)

6570.2 Screw

6570.3 Screw **

6570.4 Screw

6570.5 Screw
6580 Nut (rotor)

6700.1 Key

6700.2 Key

* When supplied. ** Not shown.

CPXNS CASING HAS CENTRE-LINE MOUNTING FEET

Page 36 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

3855 6569.1 6580 6700.2 3126 4590.5 3610 3400 252 6570.2 2460.1 1220

3134 6569.2 224.1 224.2 6569.

3 2923 220 230 241.2 6570.1 4590.3 4610 4590.2 4590.1 241.1 3300.1

8.4 CPXS – frame mounted – sleeved shaft – dual containment

3200

4590.4

3260

6570.4

2540

6700.1

2100.2

3011.1

3856

6570.5

3400

1100

2200

2100.1

3300.2

6569.4

Item Description

220 Magnet assembly (inner)

224.1 Containment shell

224.2 Containment shell
230 Magnet assembly (outer)

241.1 Tolerance ring

241.2 Tolerance ring
252 Skid ring *

1100 Casing
1220 Cover

2100.1 Shaft

2100.2 Shaft
2200 Impeller

2460.1 Spacer sleeve (shaft)
2540 Flinger (liquid)
2923 Pin

3011.1 Radial ball bearing

3011.2 Radial ball bearing
3126 Shim (pack)
3134 Support foot
3200 Bearing housing
3260 Bearing cover

3300.1 Bearing bush

3300.2 Bearing bush

3400 Bearing sleeve
3610 Thrust collar
3855 Constant level oiler *
3856 Oil sight gauge *

4590.1 Gasket

4590.2 Gasket

4590.3 Gasket

4590.4 Gasket

4590.5 Gasket
4610 0-ring

6569.1 Plug (filler) *

6569.2 Plug (magnetic) *

6569.3 Plug *

6569.4 Plug

6570.1 Screw (with washer)

6570.2 Screw

6570.3 Screw **

6570.4 Screw

6570.5 Screw
6580 Nut (rotor)

6700.1 Key

6700.2 Key

* When supplied. ** Not shown.

CPXNS CASING HAS CENTRE-LINE MOUNTING FEET

Page 37 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

3134 6569.2 224.2 6569.3 2923 220 230 241.2 6570.1 4590.3 1240 4590.2 4590.1 241.1 3300.1

3855 65

69.1 6580 6700.2 3126 4590.5 3610 6570.6 252 6570.2 1220 2460.2

8.5 CPXS – frame mounted – coated shaft – metal shell

3200

4590.4

3260

6570.4

2540

6700.1

2100.2

3011.1

3856

6570.5

Item Description

220 Magnet assembly (inner)

224.2 Containment shell
230 Magnet assembly (outer)

241.1 Tolerance ring

241.2 Tolerance ring
252 Skid ring *

1100 Casing
1220 Cover
1240 Clamping ring

2100.1 Shaft

2100.2 Shaft
2200 Impeller

2460.2 Spacer sleeve (cover) *
2540 Flinger (liquid)
2923 Pin

3011.1 Radial ball bearing

3011.2 Radial ball bearing
3126 Shim (pack)
3134 Support foot
3200 Bearing housing
3260 Bearing cover

3300.1 Bearing bush

3300.2 Bearing bush

3610 Thrust collar
3855 Constant level oiler *
3856 Oil sight gauge *

4590.1 Gasket

4590.2 Gasket

4590.3 Gasket

4590.4 Gasket

4590.5 Gasket

6569.1 Plug (filler) *

6569.2 Plug (magnetic) *

6569.3 Plug *

6569.4 Plug

6570.1 Screw (with washer)

6570.2 Screw

6570.3 Screw **

6570.4 Screw

6570.5 Screw

6570.6 Screw *
6580 Nut (rotor)

6700.1 Key

6700.2 Key

* When supplied. ** Not shown.

CPXNS CASING HAS CENTRE-LINE MOUNTING FEET

1100

2200

2100.1

3300.2

6569.4

Page 38 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

3855 6569.1 6580 6700.2 3126 4590.5 3610

3400

252 6570.6 6570.2 2460.1 1220 2460.2

3134 6569.2 224.2 6569.3 2923 220 230 241.2 6570.1 4590.3 1240 4590.2 4590.1 241.1 3300.1

8.6 CPXS – frame mounted – sleeved shaft – metal shell

3200

4590.4

3260

6570.4

2540

6700.1

2100.2

3011.1

3856

6570.5

3400

1100

2200

2100.1

3300.2

6569.4

Item Description

220 Magnet assembly (inner)

224.2 Containment shell
230 Magnet assembly (outer)

241.1 Tolerance ring

241.2 Tolerance ring
252 Skid ring *

1100 Casing
1220 Cover
1240 Clamping ring

2100.1 Shaft

2100.2 Shaft
2200 Impeller

2460.1 Spacer sleeve (shaft)

2460.2 Spacer sleeve (cover) *
2540 Flinger (liquid)
2923 Pin

3011.1 Radial ball bearing

3011.2 Radial ball bearing
3126 Shim (pack)
3134 Support foot
3200 Bearing housing
3260 Bearing cover

3300.1 Bearing bush

3300.2 Bearing bush

3400 Bearing sleeve
3610 Thrust collar
3855 Constant level oiler *
3856 Oil sight gauge *

4590.1 Gasket

4590.2 Gasket

4590.3 Gasket

4590.4 Gasket

4590.5 Gasket

6569.1 Plug (filler) *

6569.2 Plug (magnetic) *

6569.3 Plug *

6569.4 Plug

6570.1 Screw (with washer)

6570.2 Screw

6570.3 Screw **

6570.4 Screw

6570.5 Screw

6570.6 Screw *
6580 Nut (rotor)

6700.1 Key

6700.2 Key

* When supplied. ** Not shown.

CPXNS CASING HAS CENTRE-LINE MOUNTING FEET

Page 39 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

3134 6569.2 224

.1

6569.3 2923 220 230 241.2 6570.1 4590.3 4590.2 4590.1 241.1 3300.1

8.7 CPXPS – frame mounted – coated shaft – PEEK shell

6569.1 6580 6700.2 3126 4590.5 3610 252 6570.2 1220

3855

3200

4590.4

3260

6570.4

23953C7267 73E6619B 76 252

6569.5

1100

30B

1

2540

6700.1

2100.2

3011.1

3856

6570.5

Item Description

220 Magnet assembly (inner)

224.1 Containment shell
230 Magnet assembly (outer)

241.1 Tolerance ring

241.2 Tolerance ring
252 Skid ring *

1100 Casing
1220 Cover

2100.1 Shaft

2100.2 Shaft
2200 Impeller
2540 Flinger (liquid)
2923 Pin

3011.1 Radial ball bearing

3011.2 Radial ball bearing
3126 Shim (pack)
3134 Support foot
3200 Bearing housing
3260 Bearing cover

3300.1 Bearing bush

3300.2 Bearing bush

3610 Thrust collar
3855 Constant level oiler *
3856 Oil sight gauge *

4590.1 Gasket

4590.2 Gasket

4590.3 Gasket

4590.4 Gasket

4590.5 Gasket

6569.1 Plug (filler) *

6569.2 Plug (magnetic) *

6569.3 Plug *

6569.4 Plug

6569.5 Plug

6570.1 Screw (with washer)

6570.2 Screw

6570.3 Screw **

6570.4 Screw

6570.5 Screw
6580 Nut (rotor)

6700.1 Key

6700.2 Key

* When supplied. ** Not shown.

CPXNS CASING HAS CENTRE-LINE MOUNTING FEET

2200

2

2100.1

6

3300.2

237

6569.4

30A

Page 40 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

6570.5

6569.1 6580 6700.2 3126 4590.5 3610 3400 2460.1 252 6570.2 1220

3400

3134 6569.2 224

.1

6

569.3 2923 220 230 241.2 6570.1 4590.3 4590.2 4590.1 241.1 3300.1

8.8 CPXPS – frame mounted – sleeved shaft – PEEK shell

3855

3200

4590.4

3260

6570.4

6569.5

1100

306

1

2540

6700.1

2100.2

3011.1

3856

Item Description

220 Magnet assembly (inner)

224.1 Containment shell
230 Magnet assembly (outer)

241.1 Tolerance ring

241.2 Tolerance ring
252 Skid ring *

1100 Casing
1220 Cover

2100.1 Shaft

2100.2 Shaft
2200 Impeller

2460.1 Spacer sleeve (shaft)
2540 Flinger (liquid)
2923 Pin

3011.1 Radial ball bearing

3011.2 Radial ball bearing
3126 Shim (pack)
3134 Support foot
3200 Bearing housing
3260 Bearing cover

3300.1 Bearing bush

3300.2 Bearing bush
3400 Bearing sleeve

3610 Thrust collar
3855 Constant level oiler *
3856 Oil sight gauge *

4590.1 Gasket

4590.2 Gasket

4590.3 Gasket

4590.4 Gasket

4590.5 Gasket

6569.1 Plug (filler) *

6569.2 Plug (magnetic) *

6569.3 Plug *

6569.4 Plug

6569.5 Plug

6570.1 Screw (with washer)

6570.2 Screw

6570.3 Screw **

6570.4 Screw

6570.5 Screw
6580 Nut (rotor)

6700.1 Key

6700.2 Key

* When supplied. ** Not shown.

CPXNS CASING HAS CENTRE-LINE MOUNTING FEET

2200

2

2100.1

6

3300.2

237

6569.4

30A

Page 41 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

8.9 CPXPS - auxiliary connection points

Auxiliary connection (Rp)

A G 1/4 Bearing housing drain (plugged when provided)

B Casing drain plug (plugged as standard)

C Rp 3/8 Leakage (plugged when provided)

D Casing fill (plugged as standard)

F Rp 3/8 External flush connection (plugged when provided)

H Rp 1/4 Discharge gauge connection (plugged when provided)

J Rp 1/4 Suction gauge flush connection (plugged when provided)

K G 1/2 Sight glass (when fitted)
L Rp 1/4 Constant level oiler (when fitted)

V Rp 3/8 Fluid temperature connection (plugged when provided)
W Rp 3/8 Bearing housing vent ( when provided)
Y1 Rp 1/2 Not used
Y2 Rp 1/2 Not used

Z Rp 1/2 Assembly access (plugged as standard)

Page 42 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

150 Nm

8.10 CPXS - parts interchangeability

Drive
shaft

MODEL 80

Bearing housing

cover and bearings

Shell single/dual

containent

Magnetic

drive

Pump shaft

and journals

Casing cover

and bushes

Pump casing

and impeller

25-125
32-125

FRAME 1*

8 Nm

40-125
50-125

20-160
25-160
32-160
40-160

15 Nm

MODEL 100

50-160

20-160
25-160

FRAME 1*

25 Nm

32-160
40-160
50-160

50 Nm

MODEL 150

FRAME 2

50 Nm

100 Nm

Notes:

1. * Ball bearings and bearing cover common on models 80 and 100.

2. All Ø125 and Ø160 impellers have deeper back vanes than standard CPX and are therefore not interchangeable.

20-200
25-200
32-200
40-200
50-200

65-200
100-200

25-250
32-250
40-250
50-250
65-250

Page 43 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

8.11 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.

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, 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 44 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

NOTES:

Page 45 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

NOTES:

Page 46 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

NOTES:

Page 47 of 48 flowserve.com

CPXS, CPXNS and CPXPS USER INSTRUCTIONS ENGLISH 71569250 07-11

Your Flowserve factory contact:

Flowserve Pumps
Flowserve GB Limited
PO Box 17, 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:

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

Flowserve FSG – Italy
Worthing S.r.l.
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]