Flowserve CPXVC User Manual

CPXVC

USER INSTRUCTIONS

Installation

Operation

Vertical cantilever, centrifugal sump pumps

PCN=26999930 03-11 (E) Original instructions

Maintenance

These instructions must be read prior to installing,

operating, using and maintaining this equipment.

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

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........................ 8

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

4.5 Piping..........................................................12

4.6 Electrical connections.................................14

4.7 Protection systems .....................................14

6 MAINTENANCE..................................................18

6.1 General........................................................18

6.2 Maintenance schedule ................................19

6.3 Spare parts..................................................20

6.4 Recommended spares ................................20

6.5 Tools required .............................................20

6.6 Casing, seal housing and fastener torques.20

6.7 Setting impeller clearance...........................21

6.8 Renewal clearances....................................21

6.9 Disassembly................................................21

6.10 Examination of parts ...................................22

6.11 Assembly.....................................................22

7 FAULTS; CAUSES AND REMEDIES .................25

8 PARTS LISTS AND DRAWINGS........................27

8.1 CPXVC........................................................27

8.2 General arrangement drawing ....................28

9 CERTIFICATION.................................................29

10 OTHER RELEVANT DOCUMENTATION AND

MANUALS...........................................................29

10.1 Supplementary User Instruction manuals...29

10.2 Change notes..............................................29

10.3 Additional sources of information................29

Page

5 COMMISSIONING, START-UP, OPERATION AND

SHUTDOWN ......................................................15

5.1 Pre-commissioning procedure....................15

5.2 Pump lubricants..........................................15

5.3 Recessed impeller clearance .....................16

5.4 Direction of rotation ....................................16

5.5 Guarding.....................................................16

5.6 Priming and auxiliary supplies.................... 16

5.7 Starting the pump .......................................16

5.8 Running the pump ......................................17

5.9 Stopping and shutdown.............................. 18

5.10 Hydraulic, mechanical and electrical duty ..18

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CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

INDEX

Page

Additional sources (10.3).........................................38

Assembly (6.11).......................................................24

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

Bearing sizes and capacities (5.2.2)........................16

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

Certification (9) ........................................................ 38

Change notes (10.2)................................................38

Clearances, impeller (6.7) .......................................22

Commissioning and operation (5)............................15

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

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

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

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

Direction of rotation (5.4) .........................................17

Disassembly (6.9)....................................................23

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

Dismantling (6.9, Disassembly)...............................23

Drawings (8) ............................................................ 29

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

Electrical connections (4.6) .....................................14

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

Examination of parts (6.10) .....................................24

Fastener torques (6.6) .............................................22

Faults; causes and remedies (7)............................. 27

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

General arrangement drawing (8.7) ........................37

General assembly drawings (8)...............................29

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

Guarding (5.5).......................................................... 17

Handling (2.2) ............................................................9

Hydraulic, mechanical and electrical duty (5.10).....19

Impeller clearance (5.3 and 6.7)

Inspection (6.2.1 and 6.2.2)................................20/21

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

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

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

Lubrication (5.1.1, 5.2 and 6.2.3)

Lubrication schedule (5.2.5).................................... 16

Maintenance (6).......................................................19

Maintenance schedule (6.2).................................... 20

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

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

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

Ordering spare parts (6.3.1).................................... 21

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

Parts lists (8)............................................................29

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

Piping (4.5) .............................................................. 12

Pre-commissioning (5.1)..........................................15

Priming and auxiliary supplies (5.6).........................17

Protection systems (4.7)..........................................14

Page

Reassembly (6.11, Assembly) .................................24

Receipt and unpacking (2.1)......................................9

Recommended fill quantities (see 5.2.2)..................16

Recommended grease lubricants (5.2.3).................16

Recommended oil lubricants (5.2.1) ........................16

Recommended spares (6.4).....................................21

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

Replacement parts (6.3 and 6.4)..............................21

Running the pump (5.8) ...........................................18

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

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

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

Safety, protection systems (1.6 and 4.7)

Sectional drawings (8)..............................................29

Setting impeller clearance (6.7) ...............................22

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

Sources, additional information (10.3) .....................38

Spare parts (6.3) ......................................................21

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

Starting the pump (5.7).............................................17

Stop/start frequency (5.8.5)......................................18

Stopping and shutdown (5.9)...................................19

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

Storage, spare parts (6.3.2) .....................................21

Supplementary manuals or information sources......38

Supplementary User Instructions (10.1)...................38

Tools required (6.5)..................................................21

Torques for fasteners (6.6).......................................22

Trouble-shooting (see 7) ..........................................27

Vibration (5.8.4)........................................................18

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CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

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,
utilising sophisticated quality techniques, and safety
requirements.

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

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

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

1.2 CE marking and approvals

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

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

Where applicable this document incorporates
information relevant to these Directives and Approvals.

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

1.3 Disclaimer

Information in these User Instructions is believed
to be 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.

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.

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

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CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

1.6 Safety

1.6.1 Summary of safety markings

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

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

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

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

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

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

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

This sign is not a safety symbol but indicates

an important instruction in the assembly process.

1.6.2 Personnel qualification and training

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

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

1.6.3 Safety action

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

NEVER DO MAINTENANCE WORK

WHEN THE UNIT IS CONNECTED TO POWER

GUARDS MUST NOT BE REMOVED WHILE

THE PUMP IS OPERATIONAL

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

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

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

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

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

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

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

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CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

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

Gland packing must not be used when pumping
hazardous liquids.

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

NEVER RUN THE PUMP DRY
Liquid level controls are recommended to avoid the risk
of dry running.

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

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

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

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.

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

The motor, coupling, pump thrust bearing and seal
can be made compliant with 94/9/EC ATEX Directive
for Equipment Categories 2 and 3 as required by the
duty conditions.

See the pump nameplate and Declaration of Conformity
for the pump classification.

Users must pay particular attention to pump operation
and maintenance instructions because of the hazard
of the explosive atmosphere.

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

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CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

Temperature class

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)

External examination
body *

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 an ambient in the range of -80 to +55 ºC (-112 to
+131 ºF); refer to Flowserve for ambient
temperatures outside this range for this product.

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

to EN 13463-1

T6
T5
T4
T3
T2
T1

Maximum surface

temperature permitted

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

Temperature limit of

liquid handled

Consult Flowserve
Consult Flowserve

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

* The 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.

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

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

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

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

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.

Avoid mechanical, hydraulic or electrical overload by
using motor overload trips, a temperature or 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.

The equipment utilises polymer based seals and
bearing surfaces that could be corroded if they
are in contact with unsuitable liquids or gases.
These surfaces are important for the operation of
the pump. Contact Flowserve if you are uncertain
about the performance of these materials with
respect to aggressive substances that may be
present in the hazardous area.

The pump casing must be flooded with liquid to the
minimum level on the dimensional General
Arrangement (GA) drawing, at any time that the pump
is operated.

1.6.4.4 Preventing the build up of explosive
mixtures

ENSURE THE PUMP IS PROPERLY FILLED

AND VENTED AND DOES NOT RUN DRY

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CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

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 seal chambers, auxiliary shaft seal
systems and any heating and cooling systems are
properly filled.

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

To avoid potential hazards from fugitive emissions of
vapor 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
and anti-static for Category 2.

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

Avoid electrostatic charge: do not rub non-metallic

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

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

1.6.4.6 Preventing leakage

1.6.4.7 Maintenance to avoid the hazard

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

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

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

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

1.7 Nameplate and safety labels

1.7.1 Nameplate

For details of nameplate, see the Declaration of
Conformity. Where a unit is ATEX Group II Category

1 below the soleplate there is an additional ATEX
marking plate (see section 1.6.4.2 Marking).

1.7.2 Safety labels

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

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

Oil lubricated units only:

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

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

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

Page 8 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

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.

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

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
1 The noise level of machines in this range will most likely be of values which require noise exposure control, but typical values are
inappropriate.
Note: for 1 180 and 960 r/min reduce 1 450 r/min values by 2 dBA. For 880 and 720 r/min reduce 1 450 r/min values by 3 dBA.

Typical sound pressure level LpA at 1 m reference 20 µPa, dBA
3 550 r/min 2 900 r/min 1 750 r/min 1 450 r/min
Pump
only

Pump and
motor

Pump
only

values given in the below table are subject to a 3 dBA
tolerance and cannot be guaranteed.

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

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

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

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

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

Pump and
motor

Pump
only

Pump and
motor

Pump
only

Pump and
motor

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CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

dimension drawing of the driver

pump and the driver

2 TRANSPORT AND STORAGE

2.1 Consignment receipt and unpacking

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

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

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

2.2 Handling

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

2.3 Lifting

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

Pumps with drivers over approximately 7.5 kW, are
supplied with the pump packed as a separate item
from the driver. These should be lifted separately
into their installed position, using lifting points on the
pump soleplate, and on the motor.

When lifting pumps with drivers fitted,
the resulting center of gravity may be above the lifting
points, and the method of slinging must prevent the
machine tipping during the lift. Slings, ropes and
other lifting gear must be positioned where they
cannot slip and where a balanced lift is obtained.

For improved stability unbolt the driver and lift the
driver and pump separately.

For lifting the driver refer to the

Lift points for the pump or the

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.

should be lifted as shown.

Page 10 of 32 flowserve.com

To avoid distortion, the pump unit

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

3 DESCRIPTION

3.1 Configurations

The pump is a modular designed cantilever
centrifugal sump pump for medium duty chemical
process liquid pumping requirements.

3.2 Name nomenclature

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

2K3x3CPXVC-R10

Mark 3 wet end
impeller drive size

Nominal suction size in mm/25
Nominal discharge size in mm/25
C = Cantilever version of CPXV sump pump
R = Recessed Impeller and Casing
Nominal maximum impeller diameter in mm/25
The typical nomenclature above is the general guide

to the CPXVC size and configuration description.
For the 1.2 m nominal depth there are two sizes

available at the maximum 4 pole 50 Hz and 60 Hz
motor speeds, 2K2x2CPXVC-R10 and the
2K3x3CPXVC-R10 size. 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 recess pump casing is designed for operation
when submerged in the sump liquid.

3.3.2 Impeller

A recessed impeller is fitted which is recessed within
the back of the casing and the impeller setting is to
the rear backvanes.

3.3.3 Shaft

The shaft has a keyed drive coupling. It is supported
by rolling bearing(s) above the soleplate and has no
bearing(s) below the soleplate.

3.3.4 Bearing housing

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

3.3.5 Pump bearings and lubrication

The pump is fitted with a thrust type ball bearing that
may be configured differently dependent on use.

The thrust bearing(s) are grease lubricated.

3.3.6 Soleplate seal

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

3.3.7 Driver

The pump is normally driven by a flange mounted
electric motor. An air or hydraulic motor may be
utilized.

The position of the terminal box can be changed by
rotating the complete motor. To do this, remove the
fasteners from the motor flange, rotate the motor and
re-fit the fasteners.

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

3.4.1 Operating limits

Maximum pump ambient temperature: +55 ºC
(131 ºF) where driver is also rated for this ambient.

Maximum pump speed: refer to the nameplate.

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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 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 and checked as
detailed in section 4.5.4, Final checks.

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.

The pump mounting should have concrete or metal to
support it around its edges.

4.3.1 Levelling

The soleplate must be level so that the pump column
hangs vertically; confirmed by inspection. With the
motor removed check the top face of the machined
motor pedestal [3160] is set level to 0.05 mm (0.002 in.)
or 0.2 mm/m (0.0025 in./ft) maximum.

Larger size motors are shipped unfitted. The motor will
need to be fitted after completion of the pump
foundation installation. Turn shaft clockwise by hand to
ensure it is free to turn.

4.3.2 Packing pieces

Where the soleplate and its counterface do not each
have a machined face, packing pieces (metallic shims)
will need to be placed evenly adjacent to the foundation
(holding down) bolts to avoid “soft-foot” distortion. Turn
shaft clockwise by hand to ensure it is free to turn.

Soft-foot distortion may significantly increase vibration
and damage equipment by causing distortion and
should normally be inspected. If high vibration occurs
when pump is run (see Section 5, Commissioning,
start-up, operation and shutdown) place a vibration
meter at the side of the motor as soft-foot is most
effectively reduced when the vibration is reduced to a
minimum. Overall vibration measurement can be used

- it is not necessary to use a vibration spectrum to pick
up soft-foot which occurs at 1x running speed and
should be the first issue to check.

To adjust for soft-foot use a dial gauge on the
soleplate top face near to the holding down bolt, zero
it, record the soft-foot spring in the soleplate and
undo one holding down bolt at a time.

Soft-foot is removed by inserting packing pieces
(metallic shims) equal to or slightly less than the soft­foot spring amount recorded at the individual holding
down point locations. Re-torque the holding down bolt.
Continue this procedure for each holding down bolt
position in turn, one at a time. The thickness of
packing pieces (metallic shims) adjacent to an
individual holding down bolt should not exceed 3 mm
(0.12 in.); ie soft-foot spring is not to exceed 3 mm
(0.12 in.) at any individual location.

4.4 Grouting

Where applicable, grout in the foundation bolts.
Grouting provides solid contact between the pump unit

and foundation, prevents lateral movement of vibrating
equipment and dampens resonant vibrations.

4.5 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.

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

• Prevent excessive external pipe load

• Never draw piping into place by applying force to

pump flange connections

• Do not mount expansion joints so that their force,
due to internal pressure, acts on the pump flange

4.5.1 Suction and discharge pipework

In order to minimize friction losses and hydraulic

4.5.2 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.

4.5.3 Maximum forces and moments allowed on
the main soleplate discharge flange

The table below uses the sign convention shown for the
pump soleplate discharge flange maximum forces and
moments. These are valid for a pump end up to 100 ºC
(212 ºF) and the soleplate on a rigid foundation.

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.

Never use the pump as a support for

piping.

Ensure piping and fittings are flushed

before use.

Ensure piping for hazardous liquids is arranged

to allow pump flushing before removal of the pump.

Discharge

flange size

mm (in.)

50 (2.0) 0.71 (160) 0.58 (130) 0.89 (200) 1.28 (290) 0.46 (340) 0.23 (170) 0.35 (260) 0.62 (460)
80 (3.0) 1.07 (240) 0.89 (200) 1.33 (300) 1.93 (430) 0.95 (700) 0.47 (350) 0.72 (530) 1.28 (950)

100 (4.0) 1.42 (320) 1.16 (260) 1.78 (400) 2.56 (570) 1.33 (980) 0.68 (500) 1.00 (740) 1.80 (1 330)

Fx Fy Fz Fr Mx My Mz Mr

Maximum forces (F) in kN (lbf) and moments (M) in Nm (lbf•ft)

4.5.4 Auxiliary piping

4.5.4.1 Pumps fitted with a soleplate packed
gland

With back-to-back double seals, the barrier liquid
should be at a minimum pressure of 1 bar (15 psi)
above the maximum pressure on the pump side of
the inner seal. The barrier liquid pressure must not
exceed limitations of the seal on the atmospheric

Ensure lubrication is supplied to the

gland packing.

4.5.4.2 Pumps fitted with mechanical seals

Seal housings/covers having an auxiliary quench
connection require connection to a suitable source of
liquid flow, low pressure steam or static pressure from
a header tank. Recommended pressure is 0.35 bar
(5 psi) or less.

Double seals require a barrier liquid between the
seals, compatible with the pumped liquid.

side. For toxic service the barrier liquid supply and
discharge must be handled safely and in line with
local legislation.

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

4.5.4.3 Pumps fitted with heating jacket

As the pump is constructed as a heated jacketed unit,
steam must be connected to the steam inlet flange and
removed via the steam outlet flange.

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Angular

These flanges are located on the upper side of the
soleplate. A flanged steam valve should be provided
at the steam inlet and outlet for control of the steam
supply.

4.5.5 Final checks

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

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 flexible element coupling is aligned with
the permitted limits.

Where there is the option of an additional
rigid coupling below the thrust bearing, above the
mechanical seal, this has full metal to metal joints
which does not permit its adjustment.

Parallel

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

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

• Use the lower of the above values and values
indicated in the coupling manual.

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

If alignment needs to be adjusted, a small amount of
adjustment of the motor is available within the motor
spigot but alignment is generally achieved
automatically on assembly. Larger motors always
require re-adjustment.

If it is not possible to achieve the alignment accuracy
defined, it may be an indication that the pump has not
been installed or handled correctly.

4.6 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.

4.7 Protection systems

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

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

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If there are any circumstances in which the system
can allow the pump to run dry, or start up empty, a
power monitor should, in addition to level control, be
fitted to stop the pump or prevent it from being
started. This is particularly relevant if the pump is
handling a flammable liquid which would need an
abatement technique due limitations of the ATEX
Categories available.

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

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

5 COMMISSIONING, START-UP,

OPERATION AND SHUTDOWN

These operations must be carried

out by fully qualified personnel.

5.1 Pre-commissioning procedure

5.1.1 Lubrication

The pump grease lubricated antifriction bearings are
normally supplied fitted with grease nipples and with
pre-greased bearings.

Grease lubricated electric motor bearings are generally
pre-greased. Refer to the motor UI for information on
the motor lubrication schedule.

Pumps with grease lubricated thrust bearings and
electric motors are supplied with pre-greased bearings.

Where the ambient is very low special lubricants are
required. If in doubt consult Flowserve for
recommendations of grease types at these lower
temperatures. Where low ambient grease has been
specially fitted this is Shell Aeroshell 22.

5.2 Pump lubricants

5.2.1 Recommended grease lubricants

Grease

Temp. range

Designation

acc. to DIN

BP

Elf

Fuchs

Esso

Mobil

Q8

Shell

Texaco

SKF

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

grades.

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

5.2.2 Bearing sizes and grease capacities

Bearing location Size Grease quantities – g (oz)

Drive end thrust

bearing

Optional thrust

bearing

Pump end line

bearing

Note: The bearing sizes do not constitute a purchasing

specification.

5.2.3 Recommended grease lubricants

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

grades.

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

5.2.4 Recommended fill quantities

Refer to section 5.2.2, Bearing sizes and grease
capacities.

5.2.5 Lubrication schedule

5.2.5.1 Grease lubricated bearings

When grease nipples are fitted, one charge between
grease changes is advisable for most operating
conditions; ie 2 000 hours interval. Normal intervals
between grease changes are 4 000 hours or at least
every 6 months.

NLGI 2 *

-20 to +100 ºC
(-4 to +212 ºF)

KP2K-25

Energrease LS-EP2 Energrease LS-EP3

Multis EP2 Multis EP3

RENOLIT EP2 RENOLIT EP3

Beacon EP2 Beacon EP3
Mobilux EP2 Mobilux EP3 **

Rembrandt EP2 Rembrandt EP3

Alvania EP2 Alvania EP2
Multifak EP2 Multifak EP3

LGEP 2

3311C3 Z 35 (1.2)

7311

back-to-

back pair

6313C3 Z 20 (0.7)

NLGI 3

-20 to +100 ºC
(-4 to +212 ºF)

KP3K-20

35 (1.2)

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

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

Never mix greases containing different

bases, thickeners or additives.

5.3 Recessed impeller clearance

The impeller clearance is set in the factory and only
needs resetting after disassembly of the unit. 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.

5.6 Priming and auxiliary supplies

5.6.1 Filling and priming

The pump end needs to be completely

submerged in the product.

5.6.2 Auxiliary supplies

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

5.6.3 Pumps fitted with a heating jacket

The pump should be pre-heated for at
least one hour using steam through the heating jacket
before hot liquid is brought into the pump. The
quantity, temperature and pressure can be obtained
from the dimensional drawing. This action is
important to avoid distortion and maintain the gap
between impeller and casing.

Ensure pump is electrically isolated. Then before
starting the driver rotate the shaft several times by
(gloved) hand to ensure freedom of rotation as the high
temperature will cause expansion and the increase in
lengths of the components should be identical.

5.7 Starting the pump

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.

a) Ensure flushing and/or cooling/

heating liquid supplies are turned ON, before
starting pump.

b) CLOSE the outlet valve partially, but ensure that

air is allowed to escape out of the discharge pipe.

c) Ensure that the liquid level in the

sump is above the minimum pump casing
submergence level.

d) Ensure all vent valves are closed

before starting.
e) Start motor and check the outlet pressure.
f) If the pressure is satisfactory, SLOWLY open the

outlet valve.
g) Do not run the pump with the outlet

valve completely closed.
h) If NO pressure, or LOW pressure, STOP the pump.

Refer to section 7, Faults; causes and remedies for

fault diagnosis.

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5.8 Running the pump

5.8.1 Pumps fitted with packed gland

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

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

Grease lubricated packed gland units will be fitted
with packing greased on initial assembly. If no
grease leakage takes place the packing will overheat.

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

Care must be taken when adjusting the gland
on an operating pump. Safety gloves are essential.
Loose clothing must not be worn to avoid being
caught up by the pump shaft. Shaft guards must be
replaced after the gland adjustment is complete.

Never run gland packing dry, even for

a short time.

5.8.2 Pumps fitted with mechanical seals

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

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

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

5.8.3 Bearings

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

If bearing temperatures are to be monitored it is
essential that a benchmark temperature is recorded

at the commissioning stage and after the bearing
temperature has stabilized.

• Record the bearing temperature (t) and the
ambient temperature (ta)

• Estimate the likely maximum ambient
temperature (tb)

• Set the alarm at (t+tb-ta+5) ºC (t+tb-ta+10 ºF)
and the trip at 100 ºC (212 ºF) for oil lubrication
and 105 ºC (220 ºF) for grease lubrication

It is important, particularly with grease lubrication, to
keep a check on bearing temperatures. After start up
the temperature rise should be gradual, reaching a
maximum after approximately 1.5 to 2 hours. This
temperature rise should then remain constant or
marginally reduce with time. (Refer to section 5.2.5
for further information.)

5.8.4 Normal vibration levels, alarm and trip

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

Alarm and trip values for installed pumps
should be based on the actual measurements (N) taken
on the pump in the fully commissioned as new condition.

Regular monitoring of the pump vibration is

recommended to show any deterioration in pump or
system operating conditions. The vibration is
measured adjacent to the pump thrust bearing.

For remote installations continuous monitoring and
automatic alert and shutdown is recommended.

Vibration velocity – unfiltered mm/sec (in./sec) r.m.s.

Normal N
Alarm N x 1.25
Shutdown trip N x 2.0

≤ 7.1 (0.28)
≤ 9.0 (0.35)

≤ 14.2 (0.56)

5.8.5 Stop/start frequency

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

Motor rating kW (hp)

Up to 15 (20) 15

Between 15 (20) and 90 (120) 10

Maximum stop/starts

per hour

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

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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) After stopping a jacketed pump,

leave the steam supply on for approximately 20
minutes. Keep steam circulating in stand-by
pumps.

d) Switch off flushing and/or cooling/heating liquid

supplies at a time appropriate to the process.

e) 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 and critical shaft
speed are 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 vapor
pressure, at the pump suction branch.

NPSH required (NPSHR) is a measure of the head
required in the pumped liquid, above its vapor 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.

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

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

Page 18 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

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

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

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

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

Do not spray air or compressed inert gas on skin.
Do not direct an air or gas jet towards other people.
Never use air or compressed inert gas to clean clothes.
Before working on the pump, take measures to

prevent an uncontrolled start. Put a warning board
on the starting device with the words:
"Machine under repair: do not start".

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

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

6.2 Maintenance schedule

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

if necessary, to ensure they function correctly.

b) Gland packings must be adjusted correctly to

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

c) Check for any leaks from gaskets and seals.

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

d) Check bearing lubricant level, and if the hours

run show a lubricant change is required.

e) Check that the duty condition is in the safe

operating range for the pump.

f) Check vibration, noise level and surface

temperature at the bearings to confirm
satisfactory operation.

g) Check dirt and dust is removed from areas around

close clearances, bearing housings and motors.

h) Check flexible coupling alignment and re-align if

necessary.

Our specialist service personnel can help with
preventative maintenance records and provide
condition monitoring for temperature and vibration to
identify the onset of potential problems.

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

for fault diagnosis.

b) Ensure equipment complies with the

recommendations in this manual.

c) Contact Flowserve if the problem persists.

6.2.1 Routine inspection (daily/weekly)

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

vibration and bearing temperatures are normal.

b) Check that there are no abnormal fluid or

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

c) Check that shaft seal leaks are within acceptable

limits.

d) Check the level and condition of oil lubricant.

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

e) Check any auxiliary supplies eg heating/cooling

(if fitted) are functioning correctly.

f) Refer to the manuals of any associated

equipment for routine checks needed.

Page 19 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

6.2.2 Periodic inspection (six monthly)

a) Check foundation bolts for

security of attachment and corrosion.

b) Check pump running records for hourly usage to

determine if bearing lubricant requires changing.

c) The coupling should be checked for correct

alignment and worn driving elements.

d) Refer to the manuals of any associated

equipment for periodic checks needed.

6.2.3 Re-lubrication

For general guidelines refer to section 5.2.5,

Lubrication schedule.

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

6.2.4 Mechanical seals

When leakage becomes unacceptable the seal will
need replacement.

6.2.5 Gland packing

The stuffing box is normally supplied with a lantern ring
to enable it to be lubricated to the centre of the packing
with the required Molykote 44 Medium or equivalent
grease from a Staufer or equivalent.

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

Designation

no.

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

3011 Radial ball bearing
3013 Bearing - thrust 1 2 3 4 50%
3712 Bearing nut 1 2 3 4 50%
4120 Lantern halves # 1 2 3 30%

4130
4200 Mechanical seals # 1 2 3 30%

4305 Lip seal # 4 6 8 9 10 100%

4590.1 *

4590.3

4590.2 Impeller gasket 4 6 8 9 12 150%

4610.1 O-ring carrier 2 3 4 50%

4610.3

# When required due to fitting as part of the original build specification.

Gland packing ­complete set #

Pump casing
gasket

Discharge flange
gasket

O-ring soleplate#

- Power end - - - - - 1 2

Number of pumps

(including stand-by)

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

1 2 3 4 50%

2 3 4 40%

4 6 8 9 12 150%

4 6 8 9 12 150%

2 3 4 50%

6.5 Tools required

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

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

• Open ended spanners (wrenches) to suit up to

M 48 screws/nuts

• Socket spanners (wrenches), up to M 48 screws

• Allen keys, up to 10 mm (A/F)

• Range of screwdrivers

• Soft mallet

More specialized equipment:

• Bearing pullers

• Bearing induction heater

• Dial test indicator

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

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

6.6 Casing, seal housing and fastener

torques

Fastener Screw size Torque Nm (lbf ft)

All except where
otherwise stated

M8
M10
M12
M16
M20

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

Page 20 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

6.7 Setting impeller clearance

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

The impeller rear clearance is the setting. Set the
back clearance to 1 mm (0.04 in.), as shown in the
following illustration:

a) Before carrying out this procedure ensure that

any mechanical seal(s) fitted can tolerate a
change in their axial setting, otherwise it will be
necessary to dismantle the unit and reset the
seal axial position after adjusting the impeller
back clearance.

Some mechanical seal types may be

impaired if moved more than 0.5 mm (0.02 in.) from
their nominal setting.

b) Disconnect the coupling if it has limited axial

flexibility.

c) Record the gap between the bearing carrier

[3240] and stool [3160] using feeler gauges.

d) The impeller does not have a fine front clearance

setting and adjustment of the impeller is not
normally required

e) Loosen the bearing carrier nuts and screws

[6570.6] and back off the bearing carrier jacking
screws by
1 mm (0.04 in).

f) Tighten the bearing carrier screws [6570.5] evenly,

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

The shaft must be turned in the direction

indicated on the casing and soleplate.

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

measure the bearing carrier [3240] to stool [3160]
gap and record the measurement.

h) Slacken the bearing carrier [6570.5] screws

evenly (about one flat at a time) until the dial

i) indicator or feeler gauge shows the correct

impeller clearance from the zero clearance
position.

j) Evenly tighten the bearing carrier screws [6570.6]

keeping the dial indicator or feeler gauges reading
the correct setting. Then tighten the hexagon nuts
[6580.3] to lock the jacking screws in position.

k) Compare the original and final gaps between the

bearing carrier and soleplate to check if the
movement of the shaft has exceeded the seal
capability (over/under compression of the seal).

Re-position the seal to correct this.
l) Check that the shaft can turn freely without binding.
m) If a cartridge seal is fitted, reset it at this point.
n) Ensure the coupling distance between shaft ends

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

6.8 Renewal clearances

As wear takes place between the impeller and cover
[1220] the overall efficiency of the pump set will
decrease. To maintain optimum efficiency it is
recommended that the clearance shown in section

6.7, Setting impeller clearance, is maintained.

6.9 Disassembly

Refer to Safety section 1.6 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.

For pumps with heating jackets, ensure that the
pump is cooled down correctly and sufficiently before
handling. After evacuating the tank and shutting off
the pump, the pumped liquid flows down through the
pump into the sump. After approximately 30 minutes
the heating steam line should be closed.

6.9.1 Pump disassembly

a) Disconnect all auxiliary pipes and tubes where

applicable.
b) Disconnect all discharge and auxiliary pipework.
c) Remove coupling guard [7450], disconnect

coupling [7000] and remove motor [8100].
d) Remove nuts securing soleplate to foundations

and lift the complete unit clear.
e) Record the gap between bearing carrier [3240]

and soleplate [6140] so that this setting can be

used during workshop assembly.
f) Remove suction tail pipe and/or strainer [9140 /

6531] if fitted.

Page 21 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

g) Remove all flushing lines as appropriate, casing

screws and discharge flange bolts.
h) Remove pump casing [1100].
i) Remove pump casing [4590.1] and discharge

flange [4590.3] gaskets and discard.

(Replacement gaskets will be required for

assembly.)
j) Clean the gasket mating surfaces.

6.9.2 Impeller removal

NEVER APPLY HEAT TO REMOVE THE

IMPELLER. TRAPPED WORKING LIQUID OR
LUBRICANT MAY CAUSE AN EXPLOSION.

6.9.2.1 Impeller removal with threaded on

impeller

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

coupling half, or fit a keyed shaft wrench directly to

the shaft.
b) Using gloved hands, raise the wrench above the

workbench by turning the impeller [2200]

clockwise as viewed from the impeller end of the

shaft.
c) Give the impeller a quick turn counter-clockwise to

strike the wrench handle against the workbench or

a wooden block. This will free the impeller from the

shaft.
d) The loosened impeller has an gasket [4610.2] that

should be discarded. Use a new O-ring for

assembly.

6.9.3 Cover and Support column

a) Remove the nut [6580.1] which fixes the cover

[1220] to the support column [1350].
b) Remove the lower cover.
c) Unbolt and remove support column [1350].

6.9.4 Bearings, seals and shaft

a) Remove flingers [2540], wetted ones by their

screw [6570]. If a seal is fitted in the soleplate,

determine its type and remove the whole bearing

housing, shaft and seal stool assembly complete

ensuring sufficient support due to the weight of

this large sub-assembly. To achieve this unscrew

the seal stool to soleplate screws and any

accessible seal to shaft clamp screws as

appropriate. The seal stool can then be removed

by unscrewing it from the bearing housing

followed by the mechanical seal.
b) Remove the bearing housing screws.
c) Drive out the labyrinth disk [4330] from the

soleplate (if fitted).

d) Remove screws [6570.6] and pull the bearing

carrier [3240] and upper shaft assembly out of the
soleplate. Take care to support the long shaft to
avoid bending or damage to it and any attached
components.

e) Pull off the coupling [7000] and remove the

coupling key [6700.1].

f) Remove thrust bearing circlip [6544](or bearing

carrier locking ring if paired angular contact
bearings are fitted.

Bearing carrier locking rings are left-

hand thread.
g) Slide the bearing carrier off of the bearing(s).
h) Remove the bearing nut [3712].
i) Pull off the bearing(s) [3013] and [3011].

6.10 Examination of parts

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

6.10.1 Casing, cover and impeller

Inspect for excessive wear, pitting, corrosion, erosion
or damage and any sealing surface irregularities.
Replace as necessary.

6.10.2 Shaft

Obtain and fit a new shaft [2100] if grooved, pitted or
worn.

6.10.3 Gaskets and O-rings

After dismantling, discard and replace.

6.10.4 Bearings

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

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 Mechanical seal or gland packing seal

(If there is no mechanical seal or gland packing at the
soleplate, go to section 6.11.2, Bearing housing sub-
assembly.)

Page 22 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

Where a mechanical seal is used, extreme cleanliness
is required during assembly. In many instances a pre­assembled cartridge seal will be used. Where this is not
the case the sealing faces must be checked to be free
from scratches or other damage. Use olive oil for fitting
elastomers.
a) Where an anti-rotation pin is fitted ensure that

correct engagement with the slot is achieved.

b) Carefully press stationary mechanical seal seat(s)

into their housing such that these are not deformed
or damaged.

c) Work to the specific manufacturer’s

instructions for the mechanical seal.

Where a packed stuffing box [4110] is fitted, pack the
stuffing box cover before fitting on to the shaft as
follows:
a) Position each ring [4130] into the box individually,

evenly and firmly.

b) Check that the shaft sleeve [2400.2] freely rotates

after fitting the first ring.

c) Stagger the 45 degree scarf joints by 90 degrees

from each other in the box.
d) Insert the inner two packing rings.
e) Insert lantern ring [4134] halves (if required).
f) Insert the remaining packing rings.
g) Position the gland [4120] squarely against the

last ring, tighten the gland nuts finger-tight only

and install on to bearing housing assembly.

Jacketed sump pumps are fitted with a gland

packing seal at the soleplate.

6.11.2 Bearing housing sub-assembly

a) Clean the inside of the bearing carrier and bores

for the bearings.
b) Fill the grease retaining ring [3864] slot with the

appropriate grease into bearing housing [3200].

The three thin grease rings may now be inserted

into this internal slot.
c) The radial bearing [3011] must be fitted to the shaft

before inserting circlip [6544] over the shaft facing

in the correct direction with taper face, facing the

radial bearing. The optional pair of back to back

thrust ball bearings use a nilos ring held by a

retaining ring which must have the C spanner slots

facing the impeller end. Only then can the thrust

bearing [3013] be fitted to the shaft

(Note 1: If an optional pair of thrust bearings is to

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

as described below.)
d) Press the thrust bearing(s) [3013] onto the shaft

using equipment that can provide a steady, even

load to the inner race.

e) Use a spatula to fill sides of the bearing with grease

of NLGI 3 grade.

f) On aggressive solvent/acid vapor service

a special fluoro-silicone grease (Molykote FS3451)
may be required. Pack the bearing fully by hand as
no grease nipple is used in the design.

g) Fit the self locking thrust bearing nut [3712] onto

the shaft and tighten with a C spanner.

h) Fit O-ring [4610.1] on the bearing carrier [3240]

and lubricate the bearing carrier bore and O-ring
with oil.

i) Ensure the shaft coupling keyway edges are free

of burrs. If optional proprietary labyrinth type
bearing housing seals [4330] are used the O­rings should be oiled to assist assembly.

j) Install the bearing carrier onto the shaft/bearing

assembly and insert the circlip [6544] or if
optional pair of back –to –back bearings, screw in
the bearing carrier locking ring into the bearing
carrier. Tighten up the bearing carrier locking
ring using a C spanner.

LH thread.

k) Check shaft [2100] for free rotation.

6.11.3 Installing the shaft sub-assembly

a) Prior to assembling the shaft and bearing carrier

sub-assembly into the bearing housing [3200]
install the bearing housing [3200], or if seal fitted
both the bearing housing and seal stool tightened
together, into the soleplate [6140] and fit using its
fasteners [6570.2] and tighten these. Fit stool
[3160] using its fasteners [6570.3], tighten these.
The shaft assembly may now be fitted into the
motor stool and bearing housing assembly until
the gap between bearing carrier [3240] and
bearing carrier [3200], is approximately 4 mm
(0.16 in.).

b) Install the bearing carrier hexagon screws

[6570.6] and the hexagon screws [6570.5] and
hexagon nuts [6580.3] but do not tighten.

c) Press the flinger [2540.1] onto the shaft, where

applicable. This should be set between 0.5 and 2
mm (0.02 and 0.08 in.) from the bearing carrier.

d) Turn the shaft [2100] to check for freedom from

rubbing.

e) Fit the greasing fittings [3853] and grease relief

[6569].

f) Fit the upper and lower flingers [2540.2 and 2540.3]

at least 6 mm (0.24 in.) from their bearing housing
and cover respectively and tighten.

g) Fit column pipe [1350] to the soleplate and tighten

its fasteners [6580.2 and 6572.1].

h) Fit the cover throttle bush [3300] and stud

[6572.2] into the cover [1220].

Page 23 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

i) Fit cover [1220] and tighten the nut [6580.1] which

fixes the cover to the support column [1350].
j) Refit the coupling hub [7000].

6.11.4 Impeller and casing assembly

a) Fit a new gasket [4590.2] into the impeller using a

small amount of grease to hold it in place. Apply

anti-galling compound (which does not contain

copper) to the impeller thread to help subsequent

removal.
b) Assemble impeller [2200] onto the shaft [2100].
c) Tighten the impeller. Use the same method as in

disassembly but rotate in opposite direction. A

few sharp strikes will tighten it to the correct level.
d) Clean the casing spigot and gasket position

mating surfaces.
e) Fit a new casing gasket [4590.1].
f) Install the pump casing with a new casing to

discharge gasket [4590.3].
g) Install casing hexagon screws [6570.1] to the

specified torques.
h) Check impeller rear clearance against original

setting, or process requirement and adjust as

necessary. (See section 6.7, Setting impeller
clearance.)

i) Check freedom to rotate within pump casing..

6.11.5 Cartridge seal assembly (if fitted)

a) To set, or reset, a cartridge seal having a PTFE

setting ring-throttle and no separate setting clips,
finger tighten the seal cover stud nuts, then fully
torque up the sleeve screws.

b) Torque up the seal cover stud nuts.

6.11.6 Coupling, motor and ancillaries

a) Reconnect pump ancillary fittings and piping.
b) Install pump into sump and connect up remaining

fittings and piping.
c) Re-check freedom of shaft to rotate by hand.
d) Re-install motor (check for correct rotation) and

then fit coupling drive element and guards.
e) If all is correct continue with the procedure described

under Section 4, Installation and section 5,

Commissioning, start-up, operation and shutdown.

Page 24 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

7 FAULTS; CAUSES AND REMEDIES

FAULT SYMPTOM
Pump o verhea ts and seizes

Bearings have short life

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump v ibr ate s o r is noisy

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal has short life

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal leaks excessi vel y

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump r equires e xcessive power

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump l ose s p rim e after s tarting

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient pressure developed

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient capacity delivered

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump d oes no t d eli ver liquid

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

PROBABLE CAUSES POSSIBLE REMEDIES

A. System troubles












B. Mechanical troubles

     

  

    
















 



    









 



  

  









  







  









 











 





 

Insufficient margin between suction pressure and

 

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

 

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



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

of pump.
Total head of system lower than pump design

head.
Specific gravity of liquid different from design.
Viscosity of liquid differs from that for which

designed.
Operation at very low capacity.

Operation at high capacity.

Misalignment due to pipe strain.

Improperly designed foundation.

Shaft bent.
Rotating part rubbing on stationary part internally. Check and CONSULT FLOWSERVE, if necessary.

Bearings worn Replace bearings.
Wearing ring surfaces worn. Replace worn wear ring/surfaces.

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

Shaft sleeve worn or scored or running off centre. Check and renew defective parts.
Mechanical seal improperly installed.

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

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 soleplate: tighten, adjust, grout
base as required.

Check shaft runouts are within acceptable values.
CONSULT FLOWSERVE.

Replace or CONSULT FLOWSERVE for improved
material selection.

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

Page 25 of 32 flowserve.com

FAULT SYMPTOM
Pump o verhea ts and seizes

Bearings have short life

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump v ibr ate s o r is noisy

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal has short life

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal leaks excessi vel y

⇓⇓⇓⇓

    

    

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⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

  

  



 

 

 

 



 

 

 

Pump r equires e xcessive power

Pump l ose s p rim e after s tarting

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient pressure developed

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient capacity delivered

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump d oes no t d eli ver liquid

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

PROBABLE CAUSES POSSIBLE REMEDIES

Incorrect type of mechanical seal for operating
conditions.

Shaft running off centre because of worn bearings
or misalignment.

Impeller out of balance resulting in vibration.
Abrasive solids in liquid pumped.
Internal misalignment of parts preventing seal ring

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

Internal misalignment due to improper repairs
causing impeller to rub.

Excessive thrust caused by a mechanical failure
inside the pump.

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

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

Damaged bearings due to contamination.

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

CONSULT FLOWSERVE.
Check misalignment and correct if necessary. If

alignment satisfactory check bearings for excessive
wear.

Check and CONSULT FLOWSERVE.

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

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

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

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

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

Check contamination source and replace damaged
bearings.

C. MOTOR ELECTRICAL PROBLEMS


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



 






 















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



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





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



Page 26 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

8 PARTS LISTS AND DRAWINGS

8.1 CPXVC

Drawing taken from 594419-005-2501

Page 27 of 32 flowserve.com

Item Description

1100 Casing
1220 Cover
1350 Column pipe
1360 Discharge pipe
2100 Shaft
2200 Impeller

2540.1 Flinger

2540.2 Flinger

2540.3 Flinger
3011 Radial ball bearing
3013 Thrust ball bearing
3160 Motor pedestal
3200 Bearing housing
3240 Bearing carrier
3300 Cover bush
3712 Bearing lock nut

3853.1 Grease nipple

3853.2 Grease nipple
3864 Grease retainer

4590.1 Gasket

4590.2 Gasket

4590.3 Gasket

4590.4 Gasket

4610.1 O-ring

4610.2 O-ring

4610.3 O-ring
6140 Sole plate
6544 Circlip
6569 Plug

6570.1 Screw

6570.1 Screw

6570.2 Screw

6570.3 Screw

6570.4 Screw

6570.5 Screw

6570.6 Screw

6570.7 Screw

6570.8 Screw

6570.9 Screw

6572.1 Stud

6572.2 Stud

6580.1 Nut

6580.2 Nut

6580.3 Nut

6580.4 Nut

6580.5 Nut
6700 Key
7000 Coupling
7450 Guard
8010 Motor
9140 Tail pipe

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

Parts interchangeability

CPXV pump size Bearing housing

and carrier

2K2x2CPXVC-R10 1 1
2K3x3CPXVC-R10 1 1

Casing gasket

8.2 General arrangement drawing

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

Page 28 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

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 29 of 32 flowserve.com

NOTES:

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

Page 30 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

Page 31 of 32 flowserve.com

CPXVC USER INSTRUCTIONS ENGLISH 26999930 03-11

Your Flowserve Factory contact:

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

Telephone (24 hours) [phone]
Sales & Admin Fax [phone]
Repair & Service Fax [phone]
Email [e-mail]

Your local Flowserve representatives:

North America:
Flowserve Pump Division
3900 Cook Boulevard
Chesapeake, VA 23323-1626, USA

Telephone [phone]
Customer Service Fax [phone]

Flowserve Pompes
13 Rue Maurice Trintignant
72234 Arnage Cedex, France

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

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

FLOWSERVE REGIONAL
SALES OFFICES:

USA and Canada

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

Europe, Middle East, Africa

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]