Flowserve Worthington WXB User Manual

Worthington® WXB centrifugal pumps

USER INSTRUCTIONS

Installation

Operation

Horizontal, Multistage,Barrel

Original Instructions
PCN=71569257 07-14 (E)

Maintenance

WXB USER INSTRUCTIONS ENGLISH - 07/14

CONTENTS
PAGE

1.0 INTRODUCTION AND SAFETY ......................... 3

1.1 G

ENERAL

1.2 CE

1.3 D

ISCLAIMER

1.4 C

OPYRIGHT

1.5 D

UTY CONDITIONS

1.6 S

AFETY

1.7 W

ARNING LABEL

1.8 S

PECIFIC MACHINE PERFORMANCE

1.9 N

OISE LEVEL

1.10 CE D

................................................................. 3

MARKING AND APPROVALS

................................ 3

............................................................. 3

............................................................. 3

................................................... 3

.................................................................... 4

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

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

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

ECLARATION

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

2.0 TRANSPORT AND STORAGE ......................... 12

2.1 C

ONSIGNMENT RECEIPT AND UNPACKING

2.2 H

ANDLING

2.3 L

IFTING

2.4 S

TORAGE

2.5 R

ECYCLING AND END OF PRODUCT LIFE

.............................................................. 12

.................................................................. 12

............................................................... 13

............. 12

............... 13

3.0 DESCRIPTION .................................................. 13

3.1 C

ONFIGURATION

3.2 N

OMENCLATURE

3.3 D

ESIGN OF MAJOR PARTS

3.4 P

ERFORMANCE AND OPERATING LIMITS

.................................................... 13

.................................................... 13

..................................... 13

............... 14

4.0 INSTALLATION ................................................ 14

4.1 L

OCATION

4.2 P

ART ASSEMBLIES

4.3 F

OUNDATION

4.4 I

NITIAL ALIGNMENT

4.5 P

IPING

4.6 E

LECTRICAL CONNECTIONS

4.7 F

INAL SHAFT ALIGNMENT CHECK

.............................................................. 14

................................................ 14

......................................................... 14

................................................. 14

.................................................................... 15

................................... 17

........................... 17

6.9 A

7.0 API DESIGN………………………………...…….35

8.0 AUXILIARIES .................................................... 43

9.0 FAULTS; CAUSES AND REMEDIES .............. 46

10.0 CERTIFICATION ............................................. 48

SSEMBLY

7.1 M

AINTENANCE SCHEDULE

7.2 S

PARE PARTS

7.3 R

ECOMMENDED SPARES

7.4 F

ASTENER TORQUES

7.5 S

ETTING IMPELLER CLEARANCE

7.6 D

ISASSEMBLY

7.7 E

XAMINATION OF PARTS

7.8 A

SSEMBLY

8.1 S

EAL AND SEAL SYSTEMS

8.2 C

HANGING OF MECHANICAL SEAL

............................................................. 33

..................................... 35

........................................................ 36

....................................... 37

............................................. 37

............................ 39

........................................................ 39

........................................ 40

............................................................. 41

..................................... 43

......................... 45

11.0 OTHER RELEVANT DOCUMENTATION AND

MANUALS............................................................... 48

11.1 S

UPPLEMENTARY USER INSTRUCTIONS

11.2 C

HANGE NOTES

11.3 A

DDITIONAL SOURCES OF INFORMATION

11.4 A

BBREVIATIONS

................................................... 48

.................................................. 49

.............. 48

............ 48

5.0 COMMISSIONING START-UP, OPERATION

AND SHUTDOWN ................................................... 17

5.1 P

RECOMMISSIONING PROCEDURE

5.2 P

UMP LUBRICANTS

5.3 I

MPELLER CLEARANCE

5.4 D

IRECTION OF ROTATION

5.5 G

UARDING

5.6 P

RIMING AND AUXILIARY SUPPLIES

5.7 S

TARTING THE PUMP

5.8 O

PERATION

5.9 S

TOPPING AND SHUTDOWN

5.10 H

YDRAULIC, MECHANICAL AND ELECTRICAL DUTY

............................................................. 26

................................................ 18

........................................... 26

...................................... 26

............................................. 26

............................................................ 26

........................ 17

....................... 26

.................................. 26

..................................................................................... 27

6.0 MAINTENANCE ................................................ 27

6.1 G

ENERAL

6.2 M

AINTENANCE SCHEDULE

6.3 S

PARE PARTS

6.4 R

ECOMMENDED SPARES

6.5 F

ASTENER TORQUES

6.6 S

ETTING IMPELLER CLEARANCE

6.7 D

ISASSEMBLY

6.8 E

XAMINATION OF PARTS

............................................................... 27

..................................... 28

........................................................ 28

....................................... 29

............................................. 30

............................ 31

........................................................ 31

........................................ 32

Page 2 of 51

1.0 INTRODUCTION AND SAFETY

WXB USER INSTRUCTIONS ENGLISH - 07/14

To establish Approvals and if the product itself is CE
Marked check the serial number plate and the
Certification.

1.1 General

These Instructions must always be kept
close to product's operating location or directly
with the product.

Flowserve's 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/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.

1.3 Disclaimer

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

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

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.

Page 3 of 51

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 Flowserve´s written agreement before start up.

1.6 Safety

1.6.1 Summary of safety markings

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

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

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

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

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

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

This symbol indicates safety

This symbol indicates "strong magnetic

WXB USER INSTRUCTIONS ENGLISH - 07/14

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 co-ordinate repair activity with operations and
health and safety personnel, and follow all plant
safety requirements and applicable safety and health
laws/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.

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

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

This symbol indicates explosive atmosphere
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.

The sign is not a safety symbol but
indicates an important instruction in the assembly
process.

This symbol indicates potential risks

connected with extremely high temperatures.

This symbol indicates potential risks

connected with extremely low temperatures.

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

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

START THE PUMP WITH
OUTLET VALVE FULLY OPEN
This is recommended to avoid the risk of overloading
and damaging the pump motor where greater power
is taken at low or shut off flow. Pump outlet valve
shall be adjusted to comply with the duty following the

Page 4 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

run-up process (See section 5 Commissioning,
startup, operation and shutdown).

NEVER RUN THE PUMP DRY

BALANCE LINE MUST BE

OPEN AT ANY TIME. (Except maintenance work)

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

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.

When ambient temperatures are
likely to drop below freezing point, the pump and any
cooling and flushing arrangements must be drained
or otherwise protected.

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 lbs) use a crane
corresponding to the mass and in accordance with
current local regulations.

NEVER DO MAINTENANCE WORK WHILST THE
UNIT IS CONNECTED TO POWER

HAZARDOUS LIQUIDS
When the pump is handling hazardous liquids care
must be taken to avoid exposure to the liquid by
appropriate sitting 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.

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

GUARDS MUST NOT BE REMOVED WHILE

PUMP IS OPERATIONAL

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

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

If hot or freezing components or auxiliary heating
supplies can present a danger to operators, they
must be shielded to avoid accidental contact. If
complete protection is not possible, the machine
access must be limited to maintenance staff only.
Note: bearing housings must not be insulated and
drive motors and bearings may be hot.

If the temperature is greater than 68 °C (155 °F) o r
below 5 °C (41 °F) in a restricted zone, or exceeds
local regulations, action as above shall be taken.

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.
Both electrical and non-electrical equipment must
meet the requirements of European Directive
94/9/EC.

1.6.4.1 Scope of compliance

HOT AND COLD PARTS

DRAIN 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)

Page 5 of 51

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.

WXB USER INSTRUCTIONS ENGLISH - 07/14

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

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

1.6.4.2 Marking

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

II 2 GD c IIC135ºC (T4)
Equipment Group

I = Mining
II = Non-mining

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

Gas and/or Dust
G = Gas; D= Dust

c = Constructional safety
(in accordance with EN13463-5)

b = Control of ignition source
(in accordance with EN13463-6)
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.

Temperatur

e class 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 (* depending on

material and construction

variant - check which is

lower)
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 it is recommended that
users fit an external surface temperature protection
device.

Avoid mechanical, hydraulic or electrical overload by
using motor overload trips or a Power Monitor and
make routine vibration monitoring.
In dirty or dusty environments, regular checks must
be made and dirt removed from areas around close
clearances, bearing housings and motors.

1.6.4.4 Preventing the build up of explosive
mixtures

ENSURE THE PUMP IS PROPERLY FILLED

AND VENTED AND DOES NOT RUN DRY

Page 6 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

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 the fitting of an appropriate Dry Run
protection device is recommended (eg liquid
detection or a Power Monitor).

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

1.6.4.5 Preventing sparks

To prevent a potential hazard from mechanical
contact the coupling guard must be non-sparking and
anti-static.
To avoid the potential hazard from random induced
current generating a spark the earth contact on the
baseplate must be used.

Avoid electrostatic charge: do not rub non­metallic surfaces with a dry cloth; ensure cloth is
damp.

The coupling must be selected to comply with
94/9/EC and correct alignment must be maintained.

1.6.4.6 Preventing leakage

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

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

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

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

If leakage of liquid to atmosphere can result in a
hazard, the installation of a liquid detection device is
recommended.

1.6.4.7 Maintenance to the centrifugal pump 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).to
include the following.

a) Any auxiliary systems installed must be

monitored, if necessary, to ensure they function
correctly.

b) Gland packings must be adjusted correctly to

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

c) Check for any leaks from gaskets and seals. The

correct functioning of the shaft seal must be
checked regularly

d) Check bearing lubricant level, and if the hours run

show a lubricant change is required.

e) Check that the duty condition is in the safe

operating range for the pump.

f) Check vibration, noise level and surface

temperature at the bearings to confirm
satisfactory operation.

g) Check dirt and dust is removed from areas

around close clearances, bearing housings and
motors.

h) Check coupling alignment and re-align if

necessary.

Page 7 of 51

1.7 Warning label

WXB USER INSTRUCTIONS ENGLISH - 07/14

Page 8 of 51

1.8 Specific machine performance

For performance parameters see section 1.5, Duty
conditions. When the Contract requirement specifies

these to be incorporated into user instructions these
are included here. 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
values given are subject to a 3 dBA tolerance and
cannot be guaranteed.
Similarly the motor noise assumed in the “pump and
motor” noise is that typically expected from standard
and high efficiency motors when on load directly
driving the pump. Note that a motor driven by an
inverter may show an increased noise at some
speeds.
If a pump unit only has been purchased for fitting with
your own driver then the “pump only” noise levels in
the table should be combined with the level for the
driver obtained from the supplier. Consult Flowserve
or a noise specialist if assistance is required in
combining the values.
It is recommended that where exposure approaches
the prescribed limit, then site noise measurements
should be made.
The values are in sound pressure level LpA at 1 m
(3.3 ft) from the machine, for “free field conditions
over a reflecting plane”.
For estimating sound power level LWA (re 1 pW) then
add 14 dBA to the sound pressure value.

WXB USER INSTRUCTIONS ENGLISH - 07/14

Page 9 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

40 77 67 71 71 69 69 69 67 62

52 78 68 72 72 70 70 70 68 63

68 79 69 73 73 71 71 71 69 64

89 80 70 74 74 72 72 72 70 65

81 71 75 75 73 73 73 71 66

82 72 76 76 74 74 74 72 67

83 73 77 77 75 75 75 73 68

84 74 78 78 76 76 76 74 69

85 75 79 79 77 77 77 75 70

86 76 80 80 78 78 78 76 71

87 77 81 81 79 79 79 77 72

88 78 82 82 80 80 80 78 73

89 79 83 83 81 81 81 79 74

1,5 meters above the floor, using a standard pressure reference of 0,00002 newton per square meter.

+1

+2

+3

+4

3

1 2 4 6 9 10

Octave MID BAND frequency [Hz]

Power B [HP] Power [kW] dB(A) Value 63 125 250 500 1 K 2 K 4 K 8 K

53.7
70

91.2

119.4
157

206.7

269.7

354.3

464.3

609.3

798.5

1046.8

1372.9

Sound pressure readings are for information only and are not subject to guarantee by Flowserve/IDP.
Decibel readings do not include driver or system noise.
Pump tested at 100% of the best efficiency point at max.impeller diameter with water.

117
154
201
264
346
454
595
780

1023

dB correction for combining noises (pump+motor)
Difference between two

levels to be combined, dB
Add to the higher level to obtain
the combined noise level,dB

Note :

1) The values showed are measured at a distance of 1 mt. (horizontally) from major pump
surfaces and 1.5 mt. above the floor.

2) The values shown are expressed in dB (A)

3) For Noise Test Procedure refer to Works Standard L-109

4) The values shown have been derived from actual noise-test data and are based on the following conditions:

- Equipment is located in a free field above a reflecting plane in which the reductionin noise level

in all directions is 6db in each octave band for each doubling of distance.

- Background noise is 10dB minimum below all noise levels in each octave band.

- The values shown are at a distance of 1 meter (horizontally) from the major pump surface and

- Overall noise level, dB(A) is determined at points of maximum noise level and the values of all

mid-band frequences are basis A scale readings.

5) Above values are given for 2950 RPM.
When the required condition flow is outside the range of 75 to 125% BEP, a part load correction (PLC) must be
added to the noise level as follows:

Percent of BEP @ required

impeller diameter
74 to 62 or 126 to 136
61 to 50 or 137 to 150
49 to 38
37 to 25

0

PLC

in dB

2.5 2 1.5

1 0.5 0

Page 10 of 51

1.10 CE Declaration

WXB USER INSTRUCTIONS ENGLISH - 07/14

Page 11 of 51

2.0 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 received in
writing within one month of receipt of the equipment.
Latter claims cannot be accepted.
Check any create/boxes/wrappings for any
accessories or spare parts which 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.

WXB USER INSTRUCTIONS ENGLISH - 07/14

Bare pumps shall be lifted as shown below.

2.3 Lifting

Four lifting lugs are provided on the baseplate to lift
the complete unit.

Take care by applying slings or ropes about

auxiliary piping and seal systems.

Page 12 of 51

A crane must be used for all pump sets in
excess of 25kg (55lb). Fully trained personnel must
carry out lifting, in accordance with local regulations.
The driver and pump weights are recorded on their
respective nameplates.

2.4 Storage

If the unit will not be put immediately into service, it
should be stored in a dry room. To avoid any damage
during the storage period, the influence of any low or
high frequency vibration must be totally inhibited. If
the pump is delivered sealed in a plastic-wrapper, it is
of max. importance to avoid any damage of that
wrapper, because this will protect the pump against
humidity. Therefore it must be checked if this wrapper
has become cracked and if so, the wrapper must be
renewed.

2.4.1 Long period storage

If the pump is delivered in a plastic bag, the
preservations stands up for one year. If the storage
period exceeds this time, the preservation must be
checked and renewed. Also the air tight plastic bag
must be changed. Moreover we recommend to order
a Flowserve Service Engineer for checking the pump
before the first start up.

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 regulations. If the
product contains substances which 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 in the "seal system"
or other utilities.

WXB USER INSTRUCTIONS ENGLISH - 07/14

usually used for heavy boiler feed service and
hydrocarbon service.
It can be combined with an inducer for low NPSHA
applications.

The sense of rotation of the pump is
clockwise (CW), looking from the coupling to the shaft
end of the pump.

3.2 Nomenclature

Example:
3 WXB-10A8 – Ind.

3 Discharge nozzle in inch.
B Barrel
10 max. impeller size in inch
A type of hydraulics
8 no. of stages
Ind Inducer

3.3 Design of major parts

3.3.1 Bearing housing

Made of carbon steel. It is flanged to the pump casing
and provides enough space for mechanical seals
according to API 682.

3.3.2 Discharge and Suction head

Both heads are designed for the maximum allowable
working pressure. To avoid any distorsion due to
thermal expansion, centerline mounting is obligatory.

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

3.0 DESCRIPTION

3.1 Configuration

The model WXB belongs to Flowserves family of
barrel pumps.
The pump line is based on a modular system, thus
providing maximum design and operating flexibility.
The maximum allowable working pressure range is
from 100 bar for the smaller sizes up to 150 bar for
the larger sizes. The pump is equipped with a
balancing device for axial thrust compensation,

Page 13 of 51

3.3.3 Balance device

To compensate the axial thrust a balancing device,
consisting of a straight drum and a steped drum head
is used. The step in the drum head separates the flow
at the drum from the influence of the last stage
impeller. This results in a smooth pressure
distribution across the drum surface, which increases
the rotordynamic stability and axial thrust
compensation.

3.3.4 Hydraulics

The hydraulics consists of three parts:

•

Impeller with wear rings

•

Multivaned diffuser with return vanes, for radial

load compensation

•

Channel ring, as internal pressure boundary and

cross over to next stage

3.3.5 Inducer

All different impellers can be optionally equipped with
an inducer for low NPSHA applications.

WXB USER INSTRUCTIONS ENGLISH - 07/14

The max. misalignment is 0.5 mm/m

baseplate length.

3.3.6 Barrel

The barrel acts as pressure casing. The design
allows that the pump internals can be pulled out fully
assembled as complete hydraulic cartridge.

3.4 Performance and operating limits

In the interest of operator safety
the unit must not be operated above the nameplate
conditions. Such operation could result in unit failure
causing injury to operating personnel. Consult
instruction book for correct operation and
maintenance of the pump and its supporting
components.

4.0 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.

4.3.2 Steel foundation

When the pump unit is mounted directly on structural
steel frame, it shall be well supported by constructural
beams. It is recommended to check the natural
frequency of the steel frame, because it shall not
coincide with the pump speed. The exact horizontal
alignment is very important!

Ensure that the base plate is
leveled horizontally to 0.5 mm/m. To avoid any
distortion of put shims under the base plate before
bolting it down to the steel frame. Welding of the base
plate to the steel frame is not recommended because
of possible distortion of the same.

4.3.3 Concrete foundation

A concrete foundation must have an exact horizontal
alignment and must be placed on solid ground. First a
basic foundation shall be built with square shaped
holes for embedding the foundation bolts. After
putting the base plate into the foundation the proper
alignment can be obtained by adjusting it with shims
under the base plate. Now insert the foundation bolts
and grout the space between the basic foundation
and the base plate with grouting cement (refer to
illustration)

It is very helpful to use a properly made and stable
wooden frame around the base plate. So the grouting
cement will not flow side. When the grouting is totally
set and hardened the foundation bolts shall be
tightened in a firm and symmetrical way.

4.2 Part Assemblies

The pumps are delivered completely mounted and
prealigned with the motor. Also the shaft seal is in the
correct position. Final alignment after complete
installation is necessary. If drivers and/or seal systems
are delivered separately, follow the assembly
procedure in section 6.8.

4.3 Foundation

The foundation shall be located on a place that allows
a minimum of pipe work and that is easily accessible
for inspection during operation. According to the
environment the foundation may consist of concrete
or of steel. It must be rigid and heavy enough to
absorb normal vibrations and shocks.

4.3.1 Horizontal alignment of the baseplate

Horizontal alignment is done with levelling screws.
Use a spirit level for correct horizontal alignment of
the baseplate.

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4.4 Initial alignment

The adjustment of motor and pump must be checked
(if necessary, make a new adjustment) before first
start up of the unit.

Parallel

Angular

Ensure pump and driver are isolated electrically and
the half couplings are disconnected.
Align the motor to the pump, not the pump to the
motor. Alignment of the motor is achieved by using
the adjustment screws.

4.4.1 Permissible misalignment limits at working
temperature

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

The pump is only pre-aligned! Carefully check
or read just alignment before start of the unit.
Take out the spacer of the coupling and check the
alignment of shafts end of pump and driver. The
maximum allowable angular offset should not exceed
0,05 degree, this means the alignment of the shaft
ends should be 0,1 mm (0.004 in.). The maximum
parallel offset should not exceed 0,05 mm
(0.002 in) and the axially offset can be ± 1 mm (0.04
in.).



instruction manual of coupling.

a) Angular Offset:The median lines of shafts

b) Parallel Offset: The median lines run parallel. The

For more details refer to the manufacturer’s

a)

b)

c)

intersect half-way between the ends of the two
shafts.

maximum allowable parallel offset depends on
the size of coupling and is indicated in the
instruction manual of manufacturer of coupling

WXB USER INSTRUCTIONS ENGLISH - 07/14

c) Axially Offset: Another offset is the displacement

of one or both of the shafts. A typical example is
thermal expansion.

How the alignment of the coupling should be done
you can see on the sketches and explanations below!

a) b) c)
a) Fix the dial gauge on the driven shaft and check

the concentricity by turning of both hubs; correct it if
necessary.

b) Fix the dial gauge on one of the hubs and check

the uniformity of the distance by turning of both
hubs.; correct it if necessary.

c) Fix the dial gauge on the driving shaft and check

the concentricity by turning of both hubs; correct it if

necessary.
If the pump is handling hot liquid, the alignment must
be rechecked in warm condition of the unit.

4.5 Piping

4.5.1 General

Protective covers are fitted to the pipe connections to
prevent foreign particles entering during
transportation and installation. Ensure that these
covers are removed from the pump before connecting
any pipes.
Maximum forces and moments allowed on the pump
flanges vary with the pump size and type. To
minimize these forces and moments which may
cause misalignment, hot bearings, worn couplings,
vibration and a possible failure of the pump, the
following points shall be strictly followed:

a) Prevent excessive external pipe load.
b) Do not connect piping by applying external force

(use of wrenches, crane,...). Piping shall be

aligned without residual stress.
c) Do not mount expansion joints so that their force,

due to internal pressure, acts on the pump flange.
Fitting an isolator and non-return valves can allow

easier maintenance. Never throttle pump on suction
side and never place a valve directly on the pump
inlet nozzle.
A non-return valve shall be located in the discharge
pipework to protect the pump from excessive back
pressure and hence reverse rotation when the unit is
stopped.
Piping and fittings shall be flushed before use. To
avoid damages of the pump install a Y-strainer or a

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WXB USER INSTRUCTIONS ENGLISH - 07/14

strainer of 40 mesh.
Piping for corrosive liquids shall be arranged to allow
pump flushing before removal of a unit.

4.5.2 Inlet Piping Requirements *

Inlet flow disturbances, such as swirl, unbalance in
the distribution of velocities and pressures, and
sudden variations in velocity can be harmful to the
hydraulic performance of a pump, its mechanical
behavior, and its reliability.

Direction of
Fluid Flow

The minimum required straight pipe length (L2)
before pump suction inlet is specified in Table 01.
The straight pipe section is to be the same diameter
as that of the pump section nozzle.

Table 01

Fitting*

90° elbow 4 5
Reducing elbow with

<30% area reduction
Reducing elbow with 30
to <50% area reduction
Reducing elbow with
>50% area reduction

Reducers Concentric Eccentric

-) 1 pipe size reduction 0 (<10°) 0 (<20°)

-) 2 pipe size reductions 0 (<20°) 1 (<30°)

-) 3 pipe size reductions 1 (<20°) 2 (<30°)

-) 4 pipe size reductions 2 (<20°) 3 (<40°)

-) 5 pipe size reductions 3 (<30°) 4 (<40°)

* excerpt from ANSI/HI 9.6.6-2009
** according to ASME B16.9-2003

Number of pipe diameters (ØD2)

Long radius ** Short radius **

3 4
2 3
0 1

4.5.3 Vent

All WXB pump casings provide self venting through
top discharge nozzle arrangement. A small bore at
the top of the seal chamber ensures venting of the
same.

4.5.4 Drain

This connection is used for total drainage of the pump
casing. A flanged drain is standard and can be
optionally equipped with various kinds of valves.
Refer to GA drawing for details of the drain
connection.

By pumping toxic or explosive
media, provide the necessary security actions, e.g.
flushing with nitrogen.

4.5.5 Warm up requirements

A warm up arrangement is a means for maintaining
an idle pump at approximate uniform temperature.
We recommend a warm up procedure for liquid
temperatures above 150°C (302°F).
Most commonly this arises when the pump is in boiler
feed service. The pump which is started first will
experience a gradual increase in water temperature
after the boiler is fired and the unit warms up.
However, when a second pump is to be put on the
line, it is desirable to first bring it nearly to the
prevailing feed water temperature by circulating water
through it before it is started. Likewise, when a pump
has been in operation and is taken off the line and
shutdown, it is essential that water be circulated
through it to maintain a uniform temperature.
Otherwise it results in distortion of the close-running
parts. If such a pump is started, rubbing would occur
inside the pump.
A general arrangement of warm up piping is
illustrated below.

Warm up flow:
2WXB: 2 m3/h (8,8 gpm)
3WXB: 3 m3/h (13,2 gpm)
4WXB: 4 m

3

/h (17,6 gpm)

6WXB: 5 m3/h (22 gpm)

Page 16 of 51