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.

Page 14 of 51

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

Page 15 of 51

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

WXB USER INSTRUCTIONS ENGLISH - 07/14

4.5.6 Balancing line

The pump must have a balancing line back to suction
for proper axial thrust balancing. This could be
a) an internal balancing line. This is usually used for

water services up to 80°C (176°F).

b) a connection for an external balancing line. This

is usually used for hot water and hydrocarbon
service.

Refer to GA drawing for type of balancing

line.

4.5.6.1 Design guidelines for external balancing
line

The balancing line shall be led back to the suction
vessel. The line must be open during operation to
avoid damage of the equipment. The maximum back
pressure created in the balance line, shall not exceed
2 bar (29 psi) above suction pressure. Therefore the
balance line shall be designed for a pressure loss of
max. 1 bar (14.5 psi). The following table gives the
expected balance flow rates:

2 WXB 6 m³/h (26.4 gpm)

3WXB 8 m³/h (35.2 gpm)
4WXB 10 m³/h (44.4 gpm)
6WXB 11 m³/h (48.4 gpm)

These flowrates shall be used for the piping design.
Flashing of the fluid in the balancing line shall be
avoided, therefore the installation of an anti-flashing
orifice at the end of the balancing line is
recommended.

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.

rotation before connecting the motor to the electrical
supply.

See section 5.5, Direction of

4.7 Final shaft alignment check

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

Design and manufacturing of the balance

line is not within the responsibility of FPD.

4.6 Electrical connections

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

It is important to be aware of the EUROPEAN
DIRECTIVE on hazardous 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

5.0 COMMISSIONING START-UP,
OPERATION AND SHUTDOWN

These operations must be

carried out by fully qualified personnel.

5.1 Precommissioning procedure

a) The bearing housing must be filled with the

indicated oil. Check also the oil level.

b) The pump must be completely filled with liquid to

avoid running dry and to guarantee a correct
performance of the pump.

c) During filling the pump shall reach the specified

temperature, so pumps for hot liquids (T > 150 °C
(302 °F)) shall be warmed up by preflushing.

d) Check the sense of rotation of the pump (Coupling

spacer dismantled).
Sense of rotation is clockwise viewed to the drive
end of the pump.

e) The pump rotor and the shaft seal must be in

correct axial position. Mounting plates of
mechanical seal must be locked at the seal gland
in open position. Drive-collar of the mechanical

Page 17 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

seal sleeve must be tightend.

f) Check the readiness of all auxiliary systems (seal

sys., lubrication sys.,...) for start up.

g) All pipe work, including the internal and the

auxiliary pipe work, must be connected correctly
and must be absolutely tight. Check the tightness
of all connections of the auxiliary pipe work. The
suction valve must be open, the discharge valve
shall be closed.

The balance line must be
opened prior to start up and locked open during
operation.

h) Turn the pump by hand, if required with the help of

a lever, to check the free rotation of the rotor. The
rotor must turn uniformly and noiselessly. Some
resistance may be felt due to friction in bearings
and seals.

i) Check the readiness of the driver for start up. Refer

to the manual of the driver (preheating for
explosion proof E-motor).

5.2 Pump Lubricants

5.2.1 Lubrication

The bearing housing shall be filled with proper
lubricating oil prior to start up. If the pump will be
started after a longer storage period, the bearing
housing should be first flushed and cleaned with
gasoline. It is not necessary to remove the
preservation oil as this will mix up thoroughly with the
lubrication oil.
Lubrication is provided by the pumping effect of the
rotating ball bearings. Maintaining the correct oil level
(middle of the oil sight glass) ensures that the lower
ball bearing is covered with oil.
For recommended lubricating oils refer to the
lubrication table 5.2.6

5.2.2 Oil change

After first start up, the oil shall be changed after 200
service hours.
Every further oil change shall take place after about
2000 service hours or at least every 6 month.
To change the oil use the following procedure:
a) Remove the reservoir (for some type of oilers you

must loose a fixing screw or lock nut, refer to
section 5.2.3 Oil level).

b) Open the oil drain on the bearing housing to

remove the oil.

c) Close the oil drain and fill in Oil through the oiler

until the oil level reaches the bottom of the sight
glass.

d) Fill the reservoir and put it quickly to the body of the

oiler. Observe the level in the reservoir. It will
decrease until the required oil level is reached
(middle of the sight glass). Ensure that enough oil
remains in the reservoir.

e) If necessary, the oil level can be adjusted by

referring to section 5.2.3 Oil level.

5.2.3 Oil level

The correct oil level is in the middle of the oil sight glass
and shall be checked when pump is not in operation.
Periodically check if the lubricating oil is mixed with any
condensed water. Careful opening of the oil drain
during a stop of the pump will show any water.

Use a spirit level to check the horizontal

alignment of the bearing housing.

A too high oil level will result in higher bearing

temperatures and therefore poorer lubrication.

5.2.4 Oil quality

Oil used for lubrication should only be of high quality.
The viscosity of the oil at working temperature must
be at least 10 cSt. The pouring point of the oil must
be in accordance with the lowest expected
temperature of the bearing housing during a stop of
the pump. For recommended lubricating oils refer to
the lubrication table.
Having selected the corresponding oil quality the
actual oil temperature at the bearing housing must be
checked after two service hours of the pump.
Considering this measured oil temperature the actual
viscosity must be determined by using the data sheet
of the oil, to verify the minimum required viscosity of
10 cSt. Do not forget, the oil temperature in the
bearing itself is about 10 °C ( ∆18 °F) higher than the
oil temperature at the bearing housing. On the
following table the oil viscosity is given at 40 °C (104
°F). Determining the correct lubricating oil one mu st
take into consideration that all bearings will have
higher temperatures during the first 20 service hours.
In constant operation the bearing temperature will
decrease about 10 °C (50 °F). The oil temperature
shall be lower than 85 °C (185 °F) after this runni ng­in time. The bearing outer race temperature should
not exceed 95°C (204°F).
If the temperature is higher, the reason may be a
wrong oil quality, wrong oil level or overload of the
pump because of excessive wear.
If the humidity at the site is high, the roller bearings
become easily rusty during stand still periods. To
avoid that, we recommend to mix the lubricating oil
with a corrosion inhibitor contact your lubrication oil
supplier for proper additives inhibitors.

5.2.5 Oil quantity

Bearing size is shown on the name plate of the pump,
and with this the correct thrust and line bearing frame
can be selected according to the following table.

Page 18 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

Bearing housing [3200.1]

with Oiler [3855] without Oiler [3855]

2WXB

3WXB

4WXB

or

6WXB

0,42 l (14.2 Fl.oz.) 0,3 l (10.1 Fl.oz.)

Bearing housing [3200.2]

with Oiler [3855] without Oiler [3855]

0,37 l (12.5 Fl.oz.) 0,25 l (8.4 Fl.oz.)

Bearing housing [3200.1]

with Oiler [3855] without Oiler [3855]

0,82 l (27.7 Fl.oz.) 0,7 l (23.6 Fl.oz.)

Bearing housing [3200.2]

with Oiler [3855] without Oiler [3855]

0,77 l (26 Fl.oz.) 0,65 l (22 Fl.oz.)

Bearing housing [3200.1]

with Oiler [3855] without Oiler [3855]

1,12 l (37.9 Fl.oz.) 1 l (33.8 Fl.oz.)

Bearing housing [3200.2]

with Oiler [3855] without Oiler [3855]

0,97 l (32.8 Fl.oz.) 0,85 l (28.7 Fl.oz.)

Page 19 of 51

2000 hours or at least every

2000 hours or at least every

2000 hours or at least every

2000 hours or at least every

5.2.6 Lubrication Table

Oil

Lubrication service

Type

Ambient temperature

°C (°F)

Oil temperature range*

°C (°F)

Viscosity

mm²/s 40°C [cSt]

First Oil Change 200 hours

Centrifugal Pump Lubrication

Further Oil Changes

Designation according to

DIN51502 ISO VG

BP -

CASTROL -

-20 to 35
(-4 to 95)

-5 to 65

(23 to 149)

32

200 hours

6 months

32

BP Energol HL32

BP Energol HLP32

Perfecto T32**

WXB USER INSTRUCTIONS ENGLISH - 07/14

Oil Bath and Purge Oil Mist Lubrication

Ball bearing

Mineral Oil

(Petroleum Based)

(95 to 140)

up to 85

(up to 185)

46

200 hours

6 months

46

BP Energol HL46

BP Energol HLP46

Perfecto T46**

35 to 60

up to 100

(up to 212)

68

200 hours

6 months

68

BP Energol HL68

BP Energol HLP68

Perfecto T68

Pure Oil Mist

Lubrication

Mineral Oil

(Petroleum Based)

-5 to 60

(23 to 140)

15 and above

(59 and above)

100

6 months

100

OMV -

Aral -

Esso -

LSC

(for oil mist)

Mobil -

Oil Companies and Lubricants

* Note that it normally takes 2 hours for bearing temperature stabilize and the final temperature will depend on the ambient, r/min, pumpage temperature and pump size.
Viscosity index shall be at least 95.

** For ambient temperature from -12°C (10 °F) upwar ds

Shell -

Texaco -

Total -

Wintershall

(BASF Group)

OMV turb HTU 32**

Aral Vitam GF 32

NUTO H32

LSO 32

Synthetic oil

Mobil Nuto H32

Mobil DTE13M

Mobil DTE24

Shell Tellus 32

Shell Turbo T32**

Rando HD 32

Azolla ZS32

Wiolan HN32
Wiolan HS32

OMV turb HTU 46**

Aral Vitam GF 46

NUTO H46

LSO 46

Synthetic oil

Mobil Nuto H46
Mobil DTE15M

Mobil DTE25

Shell Tellus 46

Shell Turbo T46**

Rando HD 46

Azolla ZS46

Wiolan HN46
Wiolan HS46

OMV turb HTU 68

Aral Vitam GF 68

NUTO H68

LSO 68

Synthetic oil

Mobil Nuto H68

Mobil DTE16M

Mobil DTE26

Shell Tellus 68

Shell Turbo T68

Rando HD 68

Azolla ZS68

Wiolan HN68
Wiolan HS68

LSO 100

Synthetic oil

-

For temperatures below -5 °C (-23 °F) use lubricat ion oil class SAE 5W-50 or API-SJ.

Barrier/Buffer Fluid for
Mech. Seal

Tandem Seal to -60°C (-76 °F) Ethanol/Propanol

The sequence of the suppliers of the lubricants does not represent any indication of their superiority.
¹ Viscosity at 40 °C (104 °F) in cSt [mm²/s] DIN 5 1562

Seal System / Pumped Liquid Quench-Oil General Features

Tandem Seal to -40 °C (-40 °F)
Back to back Seal with gascoffer-dam
Conventional back to back Seal

- Raffinated Hydraulic Oil

- Synthetic Oil

- Mixture of water / glykol
ATTENTION:

Do not use Methanol

appr. 10-15 cST at 40°C
(104 °F)

below -40°C (-40 °F)
Pourpoint vaporization
above 80°C (176 °F)

Page 20 of 51

5.2.7 Lubrication

The bearing housing shall be filled with proper
lubricating oil prior to start up. If the pump will be
started after a longer storage period, the bearing
housing should be first flushed and cleaned with
gasoline. It is not necessary to remove the
preservation oil as this will mix up thoroughly with the
lubrication oil.
Lubrication is provided by the pumping effect of the
rotating ball bearings. Maintaining the correct oil level
(middle of the oil sight glass) ensures that the lower
ball bearing is covered with oil.
For recommended lubricating oils refer to the
lubrication table 5.2.6

5.2.8 Oil change

After first start up, the oil shall be changed after 200
service hours.
Every further oil change shall take place after about
2000 service hours or at least every 6 month.
To change the oil, use the following procedure:
a) Remove the reservoir (for some type of oilers you

must loose a fixing screw or lock nut, refer to
section 5.2.3 Oil level).

b) Open the oil drain on the bearing housing to remove

the oil.

c) Close the oil drain and fill in Oil through the oiler until

the oil level reaches the bottom of the sight glass.

d) Fill the reservoir and put it quickly to the body of the

oiler. Observe the level in the reservoir. It will
decrease until the required oil level is reached
(middle of the sight glass). Ensure that enough oil
remains in the reservoir.

e) If necessary, the oil level can be adjusted by refering

to section 5.2.3 Oil level.

WXB USER INSTRUCTIONS ENGLISH - 07/14

diameter of the outer race at its lowest point.

If the pump is fitted with a Constant Level
Oiler type "ADAMS", no adjustment of the oil level is
possible.

5.2.9 Oil level

The correct oil level is in the middle of the oil sight glass
and shall be checked when pump is not in operation.
Periodically check if the lubricating oil is mixed with any
condensed water. Careful opening of the oil drain
during a stop of the pump will show any water.

Use a spirit level to check the horizontal

alignment of the bearing housing.

A too high oil level will result in higher bearing

temperatures and therefore poorer lubrication.

5.2.9.1 Adjusting of ADAMS Constant Level Oiler

This design of Constant Oiler prevents the flooding of
the bearing by means of the positive setting in the
Oiler, thus maintaining the correct oil level at all
times. When these Oilers are used on Ball or Roller
bearings, the installation is the same as described
below, excepting that the oil level in the bearing
should never cover more than maximum above inside

Page 21 of 51

5.2.10 Lubrication

The bearing housing shall be filled with proper
lubricating oil prior to start up. If the pump will be
started after a longer storage period, the bearing
housing should be first flushed and cleaned with
gasoline. It is not necessary to remove the
preservation oil as this will mix up thoroughly with the
lubrication oil.
Lubrication is provided by the pumping effect of the
rotating ball bearings. Maintaining the correct oil level
(middle of the oil sight glass) ensures that the lower
ball bearing is covered with oil.
For recommended lubricating oils refer to the
lubrication table 5.2.6

5.2.11 Oil change

After first start up, the oil shall be changed after 200
service hours.
Every further oil change shall take place after about
2000 service hours or at least every 6 month.
To change the oil, use the following procedure:
a) Remove the reservoir (for some type of oilers you

must loose a fixing screw or lock nut, refer to section

5.2.3 Oil level).

b) Open the oil drain on the bearing housing to remove

the oil.

c) Close the oil drain and fill in Oil through the oiler until

the oil level reaches the bottom of the sight glass.

d) Fill the reservoir and put it quickly to the body of the

oiler. Observe the level in the reservoir. It will
decrease until the required oil level is reached
(middle of the sight glass). Ensure that enough oil
remains in the reservoir.

e) If necessary, the oil level can be adjusted by refering

to section 5.2.3 Oil level.

5.2.12 Oil level

The correct oil level is in the middle of the oil sight glass
and shall be checked when pump is not in operation.
Periodically check if the lubricating oil is mixed with any
condensed water. Careful opening of the oil drain
during a stop of the pump will show any water.

WXB USER INSTRUCTIONS ENGLISH - 07/14

1 Denco Oiler 2 lock nut 3 adjusting sleeve
4 oil sight glass 5 oil drain 6 distance sleeve

a) The oil level may be „fine tuned“ by turning the

adjusting sleeve (3) and finally locked into
position by tightening the lock nut (2). To
replenish, the reservoir and adaptor (1) may be
removed by sliding it out of the body, removing
the adaptor and fill the reservoir. Fully reinserting
the adaptor / reservoir into the body ensures the
previously adjusted oil level is maintained. The
oiler is equipped with an overflow tube to avoid a
rise of the oil level. This is necessary to maintain
a constant level in an oil bath lubrication system,
where an oil mist is used as primary lubrication.

The oiler is pre adjusted with the distance
sleeve [6], therefore no adjustment is required
anymore.

b) Additionally you can check the correct oiler

adjustment by an oil sight glass (correct oil level
is the middle of the oil sight glass).

Refer to nameplate or part list, to reading
the correct frame size.

Use a spirit level to check the horizontal

alignment of the bearing housing.

A too high oil level will result in higher bearing

temperatures and therefore poorer lubrication.

5.2.12.1 Adjusting of DENCO Constant Level Oiler

If the pump is fitted with a Constant Level Oiler type
„DENCO“, the correct oil level has to be checked after
fitting the pump! Dimension a is the distance from the
centerline of the pump to the minimum oil level (marks
at the bearing housing).

Page 22 of 51

5.2.13 Lubrication

The bearing housing shall be filled with proper
lubricating oil prior to start up. If the pump will be
started after a longer storage period, the bearing
housing should be first flushed and cleaned with
gasoline. It is not necessary to remove the
preservation oil as this will mix up thoroughly with the
lubrication oil.
Lubrication is provided by the pumping effect of the
rotating ball bearings. Maintaining the correct oil level
(middle of the oil sight glass) ensures that the lower
ball bearing is covered with oil.
For recommended lubricating oils refer to the
lubrication table 5.2.6

5.2.14 Oil change

After first start up, the oil shall be changed after 200
service hours.
Every further oil change shall take place after about
2000 service hours or at least every 6 month.
To change the oil, use the following procedure:
a) Remove the reservoir (for some type of oilers you

must loose a fixing screw or lock nut, refer to section

5.2.3 Oil level).

b) Open the oil drain on the bearing housing to remove

the oil.

c) Close the oil drain and fill in Oil through the oiler until

the oil level reaches the bottom of the sight glass.

d) Fill the reservoir and put it quickly to the body of the

oiler. Observe the level in the reservoir. It will
decrease until the required oil level is reached
(middle of the sight glass). Ensure that enough oil
remains in the reservoir.

e) If necessary, the oil level can be adjusted by refering

to section 5.2.3 Oil level.

5.2.15 Oil level

The correct oil level is in the middle of the oil sight glass
and shall be checked when pump is not in operation.
Periodically check if the lubricating oil is mixed with any
condensed water. Careful opening of the oil drain
during a stop of the pump will show any water.

Use a spirit level to check the horizontal

alignment of the bearing housing.

WXB USER INSTRUCTIONS ENGLISH - 07/14

1 Trico-Oiler 2 fixing screw 3 leveling screw
4 oil sight glass 5 oil drain 6 counter nut

a) To check quickly the correct oiler adjustment,

measure the dimension x from the oiler-rim to the
minimum oil level (lower mark at the bearing
housing). After that check the dimension from the
oiler rim to the adjusting screw and compare it
with the dimension x, if required turn the adjusting
nut with tolerances of plus 0 mm and minus 2 mm
(see figure), and fix it.

b) Additionally you can check the correct oiler

adjustment by an oil sight glass (minimum oil
level is the middle of the oil sight glass).

A too high oil level will result in higher bearing

temperatures and therefore poorer lubrication.

5.2.15.1 Adjusting of TRICO Constant Level Oiler

If the pump is fitted with a Constant Level Oiler type
„TRICO“, the correct oil level has to be checked after
fitting the pump! Dimension a is the distance from the
centerline of the pump to the minimum oil level (marks
at the bearing housing).

Page 23 of 51

Reclassifier at

5.2.16 Pure oil mist Lubrication

Pure oil mist system utilize a continuous oil mist flow
through the bewaring housing to deliver clean oil
directly to the bearings and to maintain an outward
flow of air from the housing to prevent the ingress of
moisture and other corrosive contaminants. . If the
pump will be started after a longer storage period, the
bearing housing should be first flushed and cleaned
with gasoline. It is not necessary to remove the
preservation oil.

WXB USER INSTRUCTIONS ENGLISH - 07/14

5.2.17 Oil quality

Oil used for lubrication should only be of high quality.
Flowserve recommend that quality synthetic oil are
used where ambient temperatures fall below 4°C; the
oil used must be paraffin free to prevent plugging of
the reclassifier.
Oil with a viscosity class ISO VG100 shall be used,
refer also to lubrication table 5.2.3.

The supplied air must be dry and clean.
The cleanness shall be < 5µm.

The bearing housing requires a minimum SCFM
value as follows:

Frame Bearing

2/3/4/6 3013 1 x 0.30 SCFM
2/3/4/6 3012 1 x 0.18 SCFM

Manifold

The pressure in the bearing housing shall be 0,05
bar (0,74 psi) (20 inches of water column). A
continuous lubrication should occur during
operation and standby.
Pre Lubrication shall be performed at least 1h
before first start up.

After start up the bearing temperature

must be observed carefully. The temperature at the
bearing housing should not exceed 85°C.

Refer to the General Arrangement
drawing regarding the connections for the oil mist
lubrication.

Page 24 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

5.2.18 Lubrication

The bearing housing shall be filled with proper
lubricating oil prior to start up. If the pump will be
started after a longer storage period, the bearing
housing should be first flushed and cleaned with
gasoline. It is not necessary to remove the
preservation oil as this will mix up thoroughly with the
lubrication oil.
Lubrication is provided by the pumping effect of the
rotating ball bearings. Maintaining the correct oil level
(middle of the oil sight glass) ensures that the lower
ball bearing is covered with oil.
For recommended lubricating oils refer to the
lubrication table 5.2.7.

5.2.19 Purge oil mist Lubrication

Purge oil mist system utilize a continuous oil mist flow
through the bearing housing to deliver clean oil
directly to the bearing housing to maintain an outward
flow of air from the housing to prevent the ingress of
moisture and other corrosive contaminants.

After start up the bearing temperature

must be observed carefully. The temperature at the
bearing housing should not exceed 85°C.

Refer to the GA-drawing regarding the
connections to the supply systems.

5.2.20 Oil change

After first start up, the oil shall be changed after 200
service hours.
Every further oil change shall take place after about
2000 service hours or at least every 6 month.
To change the oil use the following procedure:

a) Open the oil drain on the bearing housing to remove

the oil.

b) Close the oil drain and fill in Oil through the vent

connection on the bearing cover until the oil level

reaches the middle of the sight glass.
c) Fill the reservoir of the constant level oiler.
d) If necessary, the oil level can be adjusted by

referring to section 5.2.4 Oil level.

5.2.21 Oil level

The correct oil level is in the middle of the oil sight glass
and shall be checked when pump is not in operation.
Periodically check if the lubricating oil is mixed with any
condensed water. Careful opening of the oil drain
during a stop of the pump will show any water.

The supplied air must be dry and clean. The
cleanness must be < 5µm.

For Purge Oil Mist Lubrication, a Reclassifier with a
Value of 0.09 SCFM should be used at the Manifold.

The bearing housing is equipped with a Purge Mist
Vent Fill Assembly at the top of the bearing housing
and with a constant level oiler with included overflow
device. The Overflow connection (3/8” tube) shall be
connected to a collection container.
Check overflow setting as per Oiler IOM.

The pressure in the bearing housing shall be 0,05
bar (0,74 psi) (20 inches of water column). A
continuous oil mist lubrication should be occur
during operation and stand by.

During operation a small increase of the oil level

can occur due to the oil mist supply.

A too high oil level will result in higher bearing

temperatures and therefore poorer lubrication.

Page 25 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

5.3 Impeller clearance

No axial adjustment of the rotor is necessary.

The rotor is not moving during operation.

5.4 Direction of rotation

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

The rotation of the driver shall be checked.

5.5 Guarding

Be sure that the coupling guard is mounted correctly
at the baseplate prior to start up.

5.6 Priming and auxiliary supplies

The pump must be completely primed prior to start
up.
a) The pump casing is considered as self venting,

so no vent connections are provided.

b) Auxiliary systems, e.g. barrier /buffer fluid

systems, cooling circuits, shall be filled according
to the user instructions.

Ensure that balance line is open.
Closed balance line leads immediately to a damage
of the pump. (This does not apply for opposed
impeller pumps). In case of an external balance line it
is recommended to install a pressure gauge right
after the pump. The measured pressure must not be
more than 2 bar (29 psi) above suction pressure.

5.7 Starting the pump

a) Start the driver according to the specification.

(Refer to driver IOM).

Pumps are usually started against

closed discharge valve.

b)

Check the discharge and suction pressure gauge
to verify the pumps delivered head. Open the
discharge valve slowly, until the pump reaches the
specified operation point. The pump must operate
smoothly, and the vibration must be below 3 mm/s
(0.12 in./sec) (API 610 vibration limits).

The discharge valve must be opened
within 30 sec. after start up. Longer operation
against closed discharge valve will damage the
pump. If a minimum flow valve is installed, take
pressure gauge readings to verify the correct
operation.

If the backpressure of the discharge
pipe is sufficient, pumps can be started against
open valve.

Ensure that your driver is capable deliver
the higher torque required by starting against
open valve.

To prevent the pump from reverse rotation
after shut down, the installation of a check valve
is recommended.
Although the pump is not affected by reverse
rotation because of special coupling design, it can
be an issue with the driver.
Check the discharge and suction pressure gauge
to verify the pumps delivered head.
The pump must operate smoothly, and the
vibration must be below 3 mm/s (0.12 in./sec) (API
610 vibration limits).
If a minimum flow valve is installed, take pressure
gauge readings to verify the correct operation.

c) Check the pipe system against any leakage.
d) Check the mechanical seal against any leakage.

Right after start up a minor leakage
of the mechanical seal is quite normal. Normally
this leakage disappears after few minutes of
operation.

5.8 Operation

a) Verify that the pump is operating within the

specified limits, min/max flow, pressure,
temperature, vibration, power

b) The bearing housing temperature shall not exceed

80 °C (176 °F). If higher bearing temperature are
observed, check the viscosity grade of the used
lubrication oil.

The minimum viscosity is 10
cSt at the expected oil temperature.
(Oil temperature = bearing gland temperature
+ 10 °C (50 °F))

c) From time to time check the pump shaft seal.

Leakage of 10 - 20 drops per hour is also with a
mechanical shaft seal unavoidable.

d) Observe the power consumption of the pump to

detect excessive wear.

5.9 Stopping and Shutdown

a) Close the outlet valve, but ensure that the pump

runs in this condition for no more than a few
seconds.

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

supplies at a time appropriate to the process.

d) For prolonged shut-downs and especially when

ambient temperatures are likely to drop below

Page 26 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

freezing point, the pump and any cooling and
flushing arrangements must be drained or
otherwise protected.

For automatic start/stop operation of the

pump, ensure that all steps described in chapter 5.6,

5.7, 5.8 and 5.9 are implemented in the control logic.

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 will
help the user to 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 meters (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 over­pressurize 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. Power varies as speed ratio
cubed. If increasing speed it is important therefore to
ensure the maximum pump working pressure is not
exceeded, the driver is not overloaded,
NPSHA>NPSHR, and that noise and vibration are
within local requirements and regulations.

5.10.4 Net positive suction head (NPSHA)

NPSH available (NPSHA.) is a measure of the
energy available in the pumped liquid, above its
vapour pressure, at the pump suction branch.
NPSH required (NPSHR.) - is a measure of the
energy required in the pumped liquid, above its
vapour pressure, to prevent the pump from cavitating.
It is important that NPSHA >NPSHR. The margin
between NPSHA >NPSHR should be as large as
possible. If any change in NPSHA is proposed,
ensure these margins are not significantly eroded.

Refer to the pump performance curve to determine
exact requirements particularly if flow has changed. If
in doubt please consult your nearest Flowserve office
for advise 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.

6.0 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 1.6.2.)

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

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

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

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.

Page 27 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

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 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 8, 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 behavior; 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 lubrication oil.

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 operating correctly.

f) Refer to the manuals of any associated

equipment if routine checks needed.

6.2.2 Periodic Inspection (every 6 Month)

a)

security of attachment and corrosion.

b) Check pump operation hours to determine if

bearing lubricant shall be changed.

c) The coupling should be checked for correct

alignment and worn driving elements.



equipment for periodic checks needed.

Refer to the manuals of any associated

Check foundation bolts for

6.3 Spare parts

6.3.1 Ordering of spares

When ordering spare parts we need the following
information:

1. pump type and pump size

2. serial number of the pump

3. number of the required spare parts

4. reference number and name of the part as listed
in the part list or in the sectional drawing

Example: for WXB pump:
3WXB-10A8, serial number G202222/01
1 piece impeller Pos. 2200.1

The serial number of each pump is indicated on the
name plate. If the material should be changed from
the original delivered one, additionally indicate the
exact material specification. If ordered impellers shall
have smaller or larger outer diameter, indicate also
with your order. Without a special remark the spare
impellers will be delivered with the diameter of the
original impellers.

If you need the wear rings oversized or undersized,
please indicate, otherwise the wear rings will be
delivered with standard size.

Page 28 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

To ensure continuous 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 parts) 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 retreatment of metallic
surfaces (if necessary) with preservative is
recommended at a 6 monthly interval.

6.4 Recommended spares

Part Start up Normal Maintenance

No.of identical pumps 1 - 3 4 - 6 7+ 1 - 3 4 - 6 7 - 9 10+

Case 1
Head (case cover and stuffing box) 1
Bearing housing 1
Shaft (w/key) 1 1 2 1
Impeller 1 1 2 3
Wear rings (set) 1 1 1 1 1 2 3
Bearings complete (antifriction,radial) 1 2 3 1 2 3 3
Bearings complete (antifriction,thrust) 1 2 3 1 2 3 3
Mechanical seal complete (Cartridge) 1 2 3 1 2 3 3
Shaft sleeve and interstage bush (set) 1 2 3 1 2 3 3
Gaskets, O-rings (set) 1 2 3 1 2 3 3
Balance drum and drum head (set) 1 1 1 1 1 2 3

Spares Recommended

Page 29 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

70,

50,

6.5 Fastener torques

Tightening Torque MA Nm (lbf.ft)

Duplex SS Carbon Steel Austenitic SS

A193

Size

Screw

M4 2.1 (1.5) 4.2 (3.1) 3 (2.2) 0.8 (0.6) 1.1 (0.8) 4.6 (3.4) 3.2 (2.4) 1.9 (1.4) 0.9 (0.7)
M5 4.1 (3) 8.3 (6.1) 5.9 (4.4) 1.6 (1.2) 2.2 (1.6) 8.6 (6.3) 6.4 (4.7) 3.6 (2.7) 1.6 (1.2)
M6 7.1 (5.2) 14.2 (10.5) 10.1 (7.4) 2.8 (2.1) 3.7 (2.7) 14.9 (11) 10.9 (8) 6.3 (4.6) 2.9 (2.1)

M8 17 (12.5) 35 (26) 24.6 (18.1) 6.8 (5) 9.1 (6.7) 36 (27) 27 (19.9) 15 (11.2) 7.1 (5.2)
M10 34 (25) 68 (50) 48 (35) 13.7 (10.1) 18.3 (13) 71 (52) 52 (38) 30 (22) 14 (10.3)
M12 59 (44) 118 (87) 84 (62) 23 (17) 31 (23) 123 (91) 91 (67) 51 (38) 24 (17.7)
M14 94 (69) 187 (138) 133 (98) 37 (27) 50 (37) 195 (144) 143 (105) 82 (60) 38 (28)
M16 145 (107) 290 (214) 206 (152) 57 (42) 76 (56) 302 (223) 222 (164) 126 (93) 58 (43)
M18 201 (148) 335 (247) 295 (218) 80 (59) 106 (78) 421 (311) 308 (227) 176 (130) 82 (60)
M20 283 (209) 472 (348) 415 (306) 112 (83) 150 (111) 592 (437) 434 (320) 247 (182) 115 (85)
M22 387 (285) 644 (475) 567 (418) 151 (111) 202 (149) 807 (595) 473 (349) 337 (249) 157 (116)
M24 487 (359) 811 (598) 714 (527) 193 (142) 257 (190) 1017 (750) 595 (439) 426 (314) 198 (146)
M27 716 (528) 1193 (880) 1050 (774) 284 (209) 379 (280) 1496 (1103) 716 (528) 292 (215)
M30 968 (714) 1614 (1190) 1420 (1047) 386 (285) 515 (380) 2033 (1500) 968 (714) 397 (293)
M33 1315 (970) 2191 (1616) 1928 (1422) 523 (386) 697 (514) 2747 (2026) 1008 (744) 536 (395)
M36 1692 (1248) 2820 (2080) 2482 (1831) 672 (496) 897 (662) 3535 (2607) 1297 (957) 690 (509)
M39 2187 (1613) 3645 (2689) 3208 (2366) 870 (642) 1160 (856) 4569 (3370) 890 (656)
M42 2714 (2002) 3920 (2891) 3980 (2936) 1146 (845) 1447 (1067) 5670 (4182)
M45 3375 (2489) 4875 (3596) 4950 (3651) 1425 (1051) 1800 (1328) 7050 (5200)
M48 4084 (3012) 5899 (4351) 5990 (4418) 1724 (1272) 2178 (1606) 8530 (6292)
M64 9750 (7192) 14083 (10388) 14300 (10548) 4117 (3037) 5201 (3836) 20370 (15025)
M68 11768 (8680) 16998 (12538) 17260 (12731) 4969 (3665) 6277 (4630) 24580 (18130)
M76 25230 (18610) 8270 (6100)

S32760,

of

S31803,

1.4462

[Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft]

A193 B7M,

A320 L7M

(NACE)

A193 B7,
A320 L7,

8.8

3.6 4.6 10.9

A193 B8M

Cl2

A4-

A2-70

Above mentioned torques are for all screwed unions, which works under dynamical load. For all other
connections you can use a corresponding smaller torque.
Anchor bolts are usually made of 4.6 material. Tightening torques indicated in above table shall not be
exceeded.

B8/B8M,

A193 B8MA

(NACE)

A2-

A4-50

Page 30 of 51

6.6 Setting impeller clearance

No axial adjustment of the rotor is necessary.

The rotor is not moving during operation.

6.7 Disassembly

See section 1.6, Safety, 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.

6.7.1 Dismantling of pump

1) Completely drain the pump by using the drain

connection. By pumping explosive or toxic media,
flush your system with Nitrogen.

2) Remove coupling guard and uncouple the pump

from the motor. Pull off the coupling hub from the
pump shaft [2100] and take out the key [6700.2].

Ensure that the motor is
locked against start up.

WXB USER INSTRUCTIONS ENGLISH - 07/14

device where the pump can be disassembled.

6.7.2 Dismantling of the line bearing side

1) Loosen hexagon head bolt [6577.1] of both bearing
covers [3260.1] and [3260.3].

2) Remove bearing cover [3260.1] together with
labyrinth ring [4330.3] and O-ring [4610.1] from the
pump.

3) Unscrew hex nuts [6581.2] and remove carefully
bearing housing [3200.2] and outer ring of radial
roller bearing [3012] with the aid of a crane from
the pump.

4) Now unscrew the shaft nut [2910.2] and pull off the
locking plate [6541.2], washer [2905.2], bearing
adaptor sleeve [2471.2], O-ring [4610.8] and inner
ring of radial roller bearing [3012] from pump shaft.

5) To remove the inner ring of radial roller bearing
[3012] from bearing adaptor sleeve [2471.2] use a
pulling-off device or use two bushings whereas one
is used as support and the other as mounting
sleeve.

6) Now remove bearing cover [3260.3], if necessary.

Line bearing:

NU311 2WXB
NU313 3WXB

NU315 4WXB
NU315 6WXB

If applied pull off the vane.

3) Drain the oil from both bearing housings, using the
plug [6569.1]. If required disconnect all auxiliary
pipings and auxiliary devices like vibration probes,
temperature probes, etc.

4) Due to the design with casing [1100] the complete

rotor of the pump can be taken out of the barrel
without disconnecting the suction or discharge
flange connections. To facilitate the moving out of
the complete rotor through the casing [1100], push
it by help with the hexagon head bolt [6577.3] and
joining piece for barrel [3121.2] out of the barrel fit.
Further insert a rod with a screwed end of 1“ pipe
thread into the bore of the tool [9310] on the
bearing housing. Now the complete rotor can be
easily pulled out of the barrel. For further
dismantling bring it to the workshop.
If a spare hydraulic cartridge is available, this can
be inserted into the barrel, and the pump is back in
service in a few hours.
If the whole pump should be removed, proceed
with step 5) and 6).

5) The pump has to be disconnected from suction and

discharge pipe. The alignment of the pump and
driver has to be checked and put it down in writing.

6) Unscrew the mounting screws of the pump on the

base plate. If the discharge casing were placed on
the base plate by taper pin, remove them too. Lift
the pump to a clean area by crane or other lifting

6.7.3 Dismantling of the thrust bearing side

1) Unscrew the mounting screw of fan case and
remove it. Unscrew the clamping screw of fan and
pull it off from the pump shaft.

2) Loosen the hexagon head bolt [6577.1] from
bearing cover [3260.1] and loosen the hexagon
head bolt [6577.1] from bearing cover [3260.2].

3) Remove bearing cover [3260.1] together with
labyrinth ring [4330.2] from the pump.

4) Unscrew hex nuts [6581.2] and remove carefully
bearing housing [3200.1] with the aid of a crane
from the pump.

5) Now unscrew the shaft nut [2910.1] and pull off the
locking plate [6541.1], washer [2905.1], bearing
adaptor sleeve [2471.1], O-ring [4610.2] and the
two thrust ball bearings [3013] from pump shaft.

6) To remove the two thrust ball bearings [3013] from
bearing adaptor sleeve [2471.1] use a pulling-off
device or use two bushings whereas one is used
as support and the other as mounting sleeve.

7) Now remove bearing cover [3260.2] ,if necessary.

Thrust bearing:

7311 BECB (J),(M) 2WXB
7313 BECB (J),(M) 3WXB

7315 BEGAM (J),(M) 4WXB
7315 BEGAM (J),(M) 6WXB

Page 31 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

6.7.4 Dismantling of mechanical seal

1) Secure the mechanical seal by putting the
mounting plates into the groove of the shaft
sleeve. Loose the grub screws, and disconnect
the seal piping.

Drain the seal system, if

applicable.

2) Loose hex nuts [6581.4] and pull off mechanical
seal cartridge from the shaft. [2100]

6.7.5 Dismantling of hydraulic cartridge

1) Start at the line bearing side first following chapter

6.7.2 and 6.7.4.

2) As next step dismantle the thrust bearing side

following chapter 6.7.3 and 6.7.4.

3) The further dismantling has to be executed from

the thrust bearing side. Remove the o-ring [4610.4]
and draw the stuffing box housing [4110] out of
the discharge casing [1140].

4) Open the hex nuts [6581.1] of the studs [6572.1]

and dismantle the pump stage by stage beginning
at thrust bearing side.

5) First off all loose the socket head cup screws

[6579.2] at the balancing drum [6230]. Then
remove the clamping ring [1240], which is fixing
the retaining ring [2530]. Now pull the balance
drum [6230] from the shaft.

6) Now take the cup spring [4263] and the diffuser

last stage [1410.2]out of the pump.

7) Start to dismantle the pump stage by stage. All

parts of a stage (impeller [2200.1, 2200.2],
diffusers [1410.2, 1410.1] and stage casing
[1160.1] have to be numbered to assure a
reassemble in original sequence. The availability
of a crane to secure the heavy parts would be very
helpful, to avoid that they will fall on the shaft and
damage or bend it.

8) Support the stage casing which is next to the

discharge casing. Lift the discharge casing
inclusive the bush [1600], which is fixed on it and
also the diffuser of the last stage [1410.2] which is
close in the casing. When necessary remove the
bush from the discharge casing by loosen the
socket head cap screws [6579.3]. By removing the
o-ring [4610.6] out of the discharge casing with the
help of a sharp tool also the diffuser can be
removed.

9) Now draw off the impeller [2200.1] with the

impeller wear ring [2300.1] from the shaft. Then
take the key [6700.1] out of the groove and
support the next stage casing [1160.1] which is
closer to the suction casing and lift the last stage
casing inclusive diffuser [1410.1] and casing wear
ring from the pump.

10) As next step remove the interstage sleeve [2410]

and the impeller [2200.1] with the impeller wear
ring[2300.1] from the shaft. Now take again one
key [6700.1] from the shaft and support the next

stage casing. Remove the next stage casing still
you have reached the suction casing [1130].

11) Remove the impeller first stage [2200.2] with the
impeller wear ring [2300.2]. Then you can draw the
shaft out off the suction casing. Pull out the suction
casing [1130] from the casing [1100]. In the
suction casing you can find the casing wear ring
for the first stage [1500.2].

Pumps equipped with an inducer
have a separate stage casing in front of 1st
stage impeller.

6.8 Examination of parts

1) Check the casing wear ring and the impeller wear
ring against any wear. The diametrical clearance
between the rings must not exceed twice the
value in new condition.

2) Check all parts against corrosion and erosion.

3) Carefully check the coupling against any wear.
Rotate the angular contact bearing by hand, to
check against abnormal sound. Check the
bearing cages against any wear and the outer
and inner race against running marks. Check the
runout of the shafts. TIR (Total Indicated Runout)
shall not exceed 0.04 mm/m (0.0005 in./ft) of
length. TIR shall not exceed 0.08 mm (0.003 in.)
over total shaft length.

6.8.1 Gap between particular parts

The diametrical gap between casing wear rings
[1500.1, 1500.2] and impeller wear rings [2300.1,

2300.2] in assembled condition is:

Pump

size

2 WXB

3 WXB

4 WXB

6 WXB

Material

Steel rings

mm (in.)

Stainless

rings

mm (in.)

Steel rings

mm (in.)

Stainless

rings

mm (in.)

Steel rings

mm (in.)

Stainless

rings

mm (in.)

Steel rings

mm (in.)

Stainless

rings

mm (in.)

Diametrical

gap

0,4 (0.016)

0,5 (0.019)

0,45 (0.017)

0,55 (0.022)

0,45 (0.017)

0,55 (0.022)

0,45 (0.017)

0,55 (0.022)

The diametrical gap between diffuser [1410.1] or
interstage bush [1610] and interstage sleeve [2410] is
0,25 mm (0.010 in.).

diametrical gap between
balance drum [6230] and

bush [1600] mm (in.)

0,3

(0.012)

0,4

(0.016)

0,35

(0.014)

0,4

(0.016)

Page 32 of 51

Gaps apply approximately for wear rings

in assembled condition.

6.9 Assembly

To assemble the pump consult the sectional
drawings.

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

6.9.1 Assembly of hydraulic cartridge

Be sure that the casing wear rings
[1500.1,1500.2] are pressed in the stage casings
[1160.1] respectively in the suction casing [1130], the
impeller wear ring[2300.1, 2300.2] are pressed on the
impellers [2200.1, 2200.2]. The rings should be fitted by
tack welding or if necessary by grub screws. The same
applies to the interstage bush [1610] in the diffusers
[1410.1] and the packing seating ring [4133] in the
stuffing box housing [4110].

1) Assembling of the pump is easier in vertical

position (horizontal position is possible too). Use
the reverse procedure as described in the
chapter 6.7.5 Dismantling of hydraulic section.

2) Put the suction casing [1130] with the line bearing

side down on a suitable support. Now insert the
shaft in the suction casing screw it on a vertically
positioned screw.

3) Put the key [6700.1] for the first stage in the shaft

groove. Slide the first impeller [2200.2] from
upwards carefully on the shaft till it touches the
shoulder on the shaft. Adjust the shaft inclusive the
impeller in reference to the suction casing by
turning the shaft in the device. The right position is
reached when the casing wear ring in the suction
casing is even with the impeller wear ring of the
first stage. This visual check is sufficient because
the exact position of the shaft will be committed by
assembling the thrust bearing.

4) Now put from upwards the stage casing [1160.1]

together with the tightly sitting diffuser [1410.1] , o­ring [4610.7], interstage bush [1610] and casing
wear ring [1500.1] over the shaft [2100] and the
impeller [2200.1] down to the suction casing [1130].

5) Slight the interstage sleeve [2410] on the shaft,

taking care that it catches the key [6700.1]. When it
isn’t the case all parts on the shaft would be
displaced to the thrust bearing and after the pump
is complete assembled it would not turn.

6) Be sure to follow the reverse sequence of all parts

according to the one of dismantling. Watch the
numbers designated at dismantling.

7) After mounting the diffuser of the last stage

[1410.2], put on the cup springs [4263] and finally
the discharge casing [1140] together with the bush

WXB USER INSTRUCTIONS ENGLISH - 07/14

[1600].

The bush [1600] is screwed with
socket head cap screws [6579.3] to the discharge
casing [1140]. Don´t forget the o-ring [4610.6]

8) Slight the balance drum [6230] on the shaft, so that
the groove on it catches the key [6700.1]. Put the
retaining ring [2530] in the groove on the shaft,
slight the ring [1240] over it and fix it with the
socket head cap screws [6579.2].

9) Now assembly the line bearing and thrust bearing
side including mechanical seals. Refer to chapter

6.9.2, 6.9.3 and 6.9.4.

10) Put on the o-rings [4610.9] to the discharge casing
[1140], the o-rings [4610.10] to the last stage
casing [1160.2] and the o-rings [4610.11] to the
suction casing [1130].

11) Now the hydraulic cartridge is fully assembled and
can be put into the casing [1100]. Use the joining
piece for barrel [3121.1] with the help of the stud
[6572.4] for final pulling off the hydraulic cartridge.

By putting the hydraulic
cartridge into the barrel take care of the o-rings
[4610.9, 4610.10, 4610.11].

12) Now tight crosswise the hex nuts [6581.1] of the
studs [6572.1]. For final torque refer to section

6.5, Fastener torques.

The pump can also be assembled by
putting the hydraulic parts piece per piece into
the barrel.

6.9.2 Assembly of shaft seal

Slide on the mechanical seal cartridge to the shaft
[2100] and fix it to the stuffing box housing [4110]
using hex nuts [6581.4] and studs [6572.2].

If the mechanical seal is
equipped with a pumping device, pay attention to the
correct sense of rotation of the same (line bearing
side is different from thrust bearing side).

1) For assembly of shaft seal use the reverse

procedure as described in section 6.7.4
„Dismantling of mechanical seal“. Afterwards follow
the instructions in section 6.9.3 „Assembly of the
thrust bearing side“ or section 6.9.4 „Assembly of
line bearing side“.

2) Replacing the mechanical seal extreme cleanness

is recommended. The sealing faces of the
mechanical seal must be free of scratches or other
damages and have to be cleaned once again
before assembly.

3) Before sliding the rotating parts on the shaft

respectively on the shaft sleeve, the fits must be
sufficiently lubricated with a molykote paste. Take
care that the sealing faces remain clean and no
grease touches them.

4) For those mechanical seals equipped with single

Page 33 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

springs, where a spring transmits the rotation from
the shaft to the rotating sealing-ring, it must be
considered that the spring must be wound up in the
right direction (transmitting power the spring shall
be contracted). In view from the spring-side to the
sealing-faces and the shaft is turning clockwise the
spring must be wound up counter clockwise and
vice-versa.

5) If a mechanical seal with pump ring for medium
circulation is used pay attention to the rotation of
pump and pump ring.

6) At assembling the seal end plate and distance
plate pay attention to the position of piping
connections for injection or quench (refer to shaft
seal drawing).

7) After assembly of complete mechanical seal unit
on the shaft sleeve by paying attention to the
correct axially positioning of rotating mechanical
seal unit mount the complete mechanical seal
unit on the stuffing box housing [4110] using nuts
[6581.4] and studs [6572.2].

6.9.3 Assembly of the thrust bearing side

1) Use the reverse procedure to chapter 6.7.3,
Dismantling of the thrust bearing side.

2) Heat up the thrust ball bearings [3013] and push it
on to the bearing adaptor sleeve [2471.1]. Slide
this sleeve on to the shaft [2100] against the
shoulder.

All sealing faces must be free of
damage, otherwise the lubrication oil would begin
leaking excessively.

3) Before assembling all O-rings have to be checked
or renewed. Special attention has to be drawn to
the O-rings of labyrinth ring [4330.1] and [4330.2]
at assembling into bearing cover. If one of the O­rings is stuck here the performance of the labyrinth­type seals will be reduced or they even will break in
operation. If seal rings are assembled for item
[4330.1] and [4330.2] pay attention to the correct
assembly.

4) The washer [2905.1] has to be fitted correctly and
fixed by the locking plate [6541.1] and shaft nut
[2910.1].

5) Fixing the bearing side special attention has to be
drawn to the cylindrical pin [6811] of stuffing box
housing [4110] which has to grip into the flange of
the bearing side.

6.9.4 Assembly of the line bearing side

1) Use the reverse procedure to chapter 6.7.2,
Dismantling of the line bearing side.

2) Heat up the inner race of the roller bearing and
push it on to the bearing adaptor sleeve [2471.2].
Slide this sleeve on to the shaft [2100] against
shoulder.

All sealing faces must be free of

damage, otherwise the lubrication oil would begin
leaking excessively.

3) Before assembling all O-rings have to be checked
or renewed. Special attention has to be drawn to
the O-rings of labyrinth ring [4330.1] and [4330.3]
at assembling into bearing cover. If one of the O­rings is stuck here the performance of the labyrinth­type seals will be reduced or they even will break in
operation. If seal rings are assembled for item
[4330.1] and [4330.1] pay attention to the correct
assembly.
Attention: When the seal rings are equipped with a
dust lip, the space between the sealing lip and the
dust lip has to be filled with suitable grease. This
results lower wearing and a higher tightness.

4) The washer [2905.2] has to be fitted correctly and
fixed by the locking plate [6541.2] and shaft nut
[2910.2].

5) Fixing the bearing side special attention has to be
drawn to the pin [6811] of stuffing box housing
[4110] which has to grip into the flange of the
bearing side.

6.9.5 Final assembly

1) Connect suction and discharge piping

Check alignment of flanges to avoid

distortion based on too high flange forces.

2) See section 5.1, Precommissioning procedure for
precommissioning.

7.0 API Design

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 1.6.2.)

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

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

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

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.

Page 34 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

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.

7.1 Maintenance schedule

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:
d) Refer to section 8, Faults; causes and remedies,

for fault diagnosis.

e) Ensure equipment complies with the

recommendations in this manual.

f) Contact Flowserve if the problem persists.

7.1.1 Routine Inspection (daily/weekly)

The following checks should be
made and the appropriate action taken to remedy any
deviations.
g) Check operating behavior; ensure noise, vibration

and bearing temperatures are normal.

h) 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.

i) Check that shaft seal leaks are within acceptable

limits.

j) Check the level and condition of lubrication oil.

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

k) Check any auxiliary supplies eg. heating/cooling

(if fitted) are operating correctly.

l) Refer to the manuals of any associated

equipment if routine checks needed.

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

if necessary, to ensure they function correctly.

i) 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.

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

correct functioning of the shaft seal must be
checked regularly.

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

show a lubricant change is required.

l) Check that the duty condition is in the safe

operating range for the pump.

m) Check vibration, noise level and surface

temperature at the bearings to confirm
satisfactory operation.

n) Check dirt and dust is removed from areas

around close clearances, bearing housings and
motors.

i) Check coupling alignment and re-align if

necessary.

7.1.2 Periodic Inspection (every 6 Month)

d) Check foundation bolts for

security of attachment and corrosion.

e) Check pump operation hours to determine if

bearing lubricant shall be changed.

f) The coupling should be checked for correct

alignment and worn driving elements.



equipment for periodic checks needed.

Refer to the manuals of any associated

Page 35 of 51

7.2 Spare parts

7.2.1 Ordering of spares

When ordering spare parts we need the following
information:

5. pump type and pump size

6. serial number of the pump

7. number of the required spare parts

8. reference number and name of the part as listed

in the part list or in the sectional drawing

Example: for WXB pump:
3WXB-10A8, serial number G202222/01
1 piece impeller Pos. 2200.1

The serial number of each pump is indicated on the
name plate. If the material should be changed from
the original delivered one, additionally indicate the
exact material specification. If ordered impellers shall
have smaller or larger outer diameter, indicate also
with your order. Without a special remark the spare
impellers will be delivered with the diameter of the
original impellers.

If you need the wear rings oversized or undersized,
please indicate, otherwise the wear rings will be
delivered with standard size.

To ensure continuous 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 parts) will
invalidate the pump’s safety certification.

WXB USER INSTRUCTIONS ENGLISH - 07/14

7.2.2 Storage of spares

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

Page 36 of 51

70,

50,

7.3 Recommended spares

WXB USER INSTRUCTIONS ENGLISH - 07/14

Spares Recommended

Part Start up Normal Maintenance

No.of identical pumps 1 - 3 4 - 6 7+ 1 - 3 4 - 6 7 - 9 10+

Case 1
Head (case cover and stuffing box) 1
Bearing housing 1
Shaft (w/key) 1 1 2 1
Impeller 1 1 2 3
Wear rings (set) 1 1 1 1 1 2 3
Bearings complete (antifriction,radial) 1 2 3 1 2 3 3
Bearings complete (antifriction,thrust) 1 2 3 1 2 3 3
Mechanical seal complete (Cartridge) 1 2 3 1 2 3 3
Shaft sleeve and interstage bush (set) 1 2 3 1 2 3 3
Gaskets, O-rings (set) 1 2 3 1 2 3 3
Balance drum and drum head (set) 1 1 1 1 1 2 3

7.4 Fastener torques

Tightening Torque MA Nm (lbf.ft)

Duplex SS Carbon Steel Austenitic SS

Size

Screw

S32760,

of

S31803,

1.4462

A193 B7M,

A320 L7M

(NACE)

A193 B7,
A320 L7,

8.8

3.6 4.6 10.9

A193 B8M

Cl2

A4-

A2-70

A193

B8/B8M,

A193 B8MA

(NACE)

A2-

A4-50

[Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft]
M4 2.1 (1.5) 4.2 (3.1) 3 (2.2) 0.8 (0.6) 1.1 (0.8) 4.6 (3.4) 3.2 (2.4) 1.9 (1.4) 0.9 (0.7)
M5 4.1 (3) 8.3 (6.1) 5.9 (4.4) 1.6 (1.2) 2.2 (1.6) 8.6 (6.3) 6.4 (4.7) 3.6 (2.7) 1.6 (1.2)
M6 7.1 (5.2) 14.2 (10.5) 10.1 (7.4) 2.8 (2.1) 3.7 (2.7) 14.9 (11) 10.9 (8) 6.3 (4.6) 2.9 (2.1)
M8 17 (12.5) 35 (26) 24.6 (18.1) 6.8 (5) 9.1 (6.7) 36 (27) 27 (19.9) 15 (11.2) 7.1 (5.2)

M10 34 (25) 68 (50) 48 (35) 13.7 (10.1) 18.3 (13) 71 (52) 52 (38) 30 (22) 14 (10.3)
M12 59 (44) 118 (87) 84 (62) 23 (17) 31 (23) 123 (91) 91 (67) 51 (38) 24 (17.7)
M14 94 (69) 187 (138) 133 (98) 37 (27) 50 (37) 195 (144) 143 (105) 82 (60) 38 (28)
M16 145 (107) 290 (214) 206 (152) 57 (42) 76 (56) 302 (223) 222 (164) 126 (93) 58 (43)
M18 201 (148) 335 (247) 295 (218) 80 (59) 106 (78) 421 (311) 308 (227) 176 (130) 82 (60)
M20 283 (209) 472 (348) 415 (306) 112 (83) 150 (111) 592 (437) 434 (320) 247 (182) 115 (85)
M22 387 (285) 644 (475) 567 (418) 151 (111) 202 (149) 807 (595) 473 (349) 337 (249) 157 (116)
M24 487 (359) 811 (598) 714 (527) 193 (142) 257 (190) 1017 (750) 595 (439) 426 (314) 198 (146)
M27 716 (528) 1193 (880) 1050 (774) 284 (209) 379 (280) 1496 (1103) 716 (528) 292 (215)
M30 968 (714) 1614 (1190) 1420 (1047) 386 (285) 515 (380) 2033 (1500) 968 (714) 397 (293)
M33 1315 (970) 2191 (1616) 1928 (1422) 523 (386) 697 (514) 2747 (2026) 1008 (744) 536 (395)
M36 1692 (1248) 2820 (2080) 2482 (1831) 672 (496) 897 (662) 3535 (2607) 1297 (957) 690 (509)
M39 2187 (1613) 3645 (2689) 3208 (2366) 870 (642) 1160 (856) 4569 (3370) 890 (656)
M42 2714 (2002) 3920 (2891) 3980 (2936) 1146 (845) 1447 (1067) 5670 (4182)
M45 3375 (2489) 4875 (3596) 4950 (3651) 1425 (1051) 1800 (1328) 7050 (5200)

Page 37 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

M48 4084 (3012) 5899 (4351) 5990 (4418) 1724 (1272) 2178 (1606) 8530 (6292)
M64 9750 (7192) 14083 (10388) 14300 (10548) 4117 (3037) 5201 (3836) 20370 (15025)
M68 11768 (8680) 16998 (12538) 17260 (12731) 4969 (3665) 6277 (4630) 24580 (18130)
M76 25230 (18610) 8270 (6100)

Above mentioned torques are for all screwed unions, which works under dynamical load. For all other
connections you can use a corresponding smaller torque.
Anchor bolts are usually made of 4.6 material. Tightening torques indicated in above table shall not be
exceeded.

Page 38 of 51

7.5 Setting impeller clearance

No axial adjustment of the rotor is necessary.

The rotor is not moving during operation.

7.6 Disassembly

See section 1.6, Safety, 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.

7.6.1 Dismantling of pump

1) Completely drain the pump by using the drain

connection. By pumping explosive or toxic media,
flush your system with Nitrogen.

2) Remove coupling guard and uncouple the pump

from the motor. Pull off the coupling hub from the
pump shaft [2100] and take out the key [6700.2].

WXB USER INSTRUCTIONS ENGLISH - 07/14

the pump to a clean area by crane or other lifting
device where the pump can be disassembled.

7.6.2 Dismantling of the line bearing side

1) Loosen hexagon head bolt [6577.1] of both bearing
covers [3260.4] and [3260.3].

2) Remove bearing cover [3260.1] together with
labyrinth ring [4330.3] and O-ring [4610.1] from the
pump.

3) Unscrew hex nuts [6581.2] and remove carefully
bearing housing [3200.2] and outer ring of radial
roller bearing [3012] with the aid of a crane from the
pump.

4) Now unscrew the shaft nut [2910.2] and pull off
lockwasher [6541.2], washer [2905.2], bearing
adaptor sleeve [2471.2], O-ring [4610.8], inner ring
of radial roller bearing [3012], sleeve [2471.2] and
O-ring [4610.8] from pump shaft.

5) Now remove bearing cover [3260.3], if necessary.

Line bearing:

NU409 2WXB
NU411 3WXB

NU413 4WXB
NU413 6WXB

Ensure that the motor is
locked against start up.

If applied pull off the vane.

3) Drain the oil from both bearing housings, using the
plug [6569.1]. If required disconnect all auxiliary
pipings and auxiliary devices like vibration probes,
temperature probes, etc.

4) Due to the design with casing [1100] the complete
rotor of the pump can be taken out of the barrel
without disconnecting the suction or discharge
flange connections. To facilitate the moving out of
the complete rotor through the casing [1100], push it
by help with the hexagon head bolt [6577.3] and
clamp stramp [3121.2] out of the barrel fit. Further
insert a rod with a screwed end of 1“ pipe thread
into the bore of the tool [9310] on the bearing
housing. Now the complete rotor can be easily
pulled out of the barrel. For further dismantling bring
it to the workshop.
If a spare hydraulic cartridge is available, this can be
inserted into the barrel, and the pump is back in
service in a few hours.

If the whole pump should be removed, proceed
with step 5) and 6).

5) The pump has to be disconnected from suction and
discharge pipe. The alignment of the pump and
driver has to be checked and put it down in writing.

6) Unscrew the mounting screws of the pump on the
base plate. If the discharge casing were placed on
the base plate by taper pin, remove them too. Lift

7.6.3 Dismantling of the thrust bearing side

1) Unscrew the mounting screw of fan case and
remove it. Unscrew the clamping screw of fan and
pull it off from the pump shaft.

2) Loosen the hexagon head bolt [6577.1] from bearing
cover [3260.1] and loosen the hexagon head bolt
[6577.1] from bearing cover [3260.2].

3) Remove bearing cover [3260.1] together with
labyrinth ring [4330.2] from the pump.

4) Unscrew hex nuts [6581.2] and remove carefully
bearing housing [3200.1] together with the aid of a
crane from the pump.

5) Now unscrew the shaft nut [2910.1] and pull off
lockwasher [6541.1], washer [2905.1], the two thrust
ball bearings [3013], bearing adaptor sleeve
[2471.1] and the O-ring [4610.2] from pump shaft.

6) Now remove bearing cover [3260.2] ,if necessary.

Thrust bearing:

7409 BGM 2WXB
7411 BGM 3WXB

7413 BCBM 4WXB
7413 BCBM 6WXB

Page 39 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

7.6.4 Dismantling of mechanical seal

1) Secure the mechanical seal by putting the mounting
plates into the groove of the shaft sleeve. Loose the
grub screws, and disconnect the seal piping.

Drain the seal system, if

applicable.

2) Loose hex nuts [6581.4] and pull off mechanical seal
cartridge from the shaft. [2100]

7.6.5 Dismantling of hydraulic cartridge

1) Start at the line bearing side first following chapter

6.7.2 and 6.7.4.

2) As next step dismantle the thrust bearing side
following chapter 6.7.3 and 6.7.4.

3) The further dismantling has to be executed from the
thrust bearing side. Remove the o-ring [4610.4] and
draw the stuffing box housing [4110] out of the
discharge casing [1140].

4) Open the hex nuts [6581.1] of the studs [6572.1] and
dismantle the pump stage by stage beginning at
thrust bearing side.

5) First off all loose the socket head cup screws
[6579.2] at the balancing drum [6230]. Then remove
the clamping ring [1240], which is fixing the retaining
ring [2530]. Now pull the balance drum [6230] from
the shaft.

6) Now take the cup spring [4263] and the diffuser last
stage [1410.2]out of the pump.

7) Start to dismantle the pump stage by stage. All parts
of a stage (impeller [2200.1, 2200.2], diffusers
[1410.2, 1410.1], the captive rings [2530.2] and
stage casing [1160.1] have to be numbered to
assure a reassemble in original sequence. The
availability of a crane to secure the heavy parts
would be very helpful, to avoid that they will fall on
the shaft and damage or bend it.

8) Support the stage casing which is next to the
discharge casing. Lift the discharge casing inclusive
the bush [1600], which is fixed on it and also the
diffuser of the last stage [1410.2] which is close in
the casing. When necessary remove the bush from
the discharge casing by loosen the socket head cap
screws [6579.3]. By removing the o-ring [4610.6] out
of the discharge casing with the help of a sharp tool
also the diffuser can be removed.

9) Now remove the captive rings [2530.2] and draw off
the impeller [2200.1] with the impeller wear ring
[2300.1] from the shaft. Then take the key [6700.2]
out of the groove and support the next stage casing
[1160.1] which is closer to the suction casing and lift
the last stage casing inclusive diffuser [1410.1] and
casing wear ring from the pump.

10) As next step remove the interstage sleeve [2410] ,
the impeller [2200.1] with the impeller wear ring
[2300.1] and the captive rings [2530.2] from the
shaft. Now take again one key [6700.1] from the
shaft and support the next stage casing. Remove

the next stage casing still you have reached the
suction casing [1130].

11) Remove the impeller first stage [2200.2] with the
impeller wear ring [2300.2]. Then you can draw the
shaft out off the suction casing. Pull out the suction
casing [1130] from the casing [1100]. In the suction
casing you can find the casing wear ring for the first
stage [1500.2].

Pumps equipped with an inducer
have a separate stage casing in front of 1st
stage impeller.

7.7 Examination of parts

1) Check the casing wear ring and the impeller wear
ring against any wear. The diametrical clearance
between the rings must not exceed twice the
value in new condition.

2) Check all parts against corrosion and erosion.

3) Carefully check the coupling against any wear.

Rotate the angular contact bearing by hand, to
check against abnormal sound. Check the
bearing cages against any wear and the outer
and inner race against running marks. Check the
runout of the shafts. TIR (Total Indicated Runout)
shall not exceed 0.04 mm/m (0.0005 in./ft) of
length. TIR shall not exceed 0.08 mm (0.003 in.)
over total shaft length.

7.7.1 Gap between particular parts

The diametrical gap between casing wear rings
[1500.1, 1500.2] and impeller wear rings [2300.1,

2300.2] in assembled condition is:

Pump

size

2 WXB

3 WXB

4 WXB

6 WXB

Material

Steel rings

mm (in.)

Stainless

rings

mm (in.)

Steel rings

mm (in.)

Stainless

rings

mm (in.)

Steel rings

mm (in.)

Stainless

rings

mm (in.)

Steel rings

mm (in.)

Stainless

rings

mm (in.)

Diametrical

gap

0,4 (0.016)

0,5 (0.019)

0,45 (0.017)

0,55 (0.022)

0,45 (0.017)

0,55 (0.022)

0,45 (0.017)

0,55 (0.022)

The diametrical gap between diffuser [1410.1] or
interstage bush [1610] and interstage sleeve [2410] is
0,25 mm (0.010 in.).

diametrical gap between
balance drum [6230] and

bush [1600] mm (in.)

0,3

(0.012)

0,4

(0.016)

0,35

(0.014)

0,4

(0.016)

Page 40 of 51

Gaps apply approximately for wear rings

in assembled condition.

7.8 Assembly

To assemble the pump consult the sectional
drawings.

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

7.8.1 Assembly of hydraulic cartridge

Be sure that the casing wear rings
[1500.1,1500.2] are pressed in the stage casings
[1160.1] respectively in the suction casing [1130], the
impeller wear ring[2300.1, 2300.2] are pressed on the
impellers [2200.1, 2200.2]. The rings should be fitted by
tack welding or if necessary by grub screws. The same
applies to the interstage bush [1610] in the diffusers
[1410.1] and the packing seating ring [4133] in the
stuffing box housing [4110].

1) Assembling of the pump is easier in vertical

position (horizontal position is possible too). Use
the reverse procedure as described in the chapter

6.7.5 Dismantling of hydraulic section.

2) Put the suction casing [1130] with the line bearing

side down on a suitable support. Now insert the
shaft in the suction casing screw it on a vertically
positioned screw.

3) Put the key [6700.1] for the first stage in the shaft

groove. Slide the first impeller [2200.2] from
upwards carefully on the shaft till it touches the
shoulder on the shaft. Adjust the shaft inclusive the
impeller in reference to the suction casing by turning
the shaft in the device. The right position is reached
when the casing wear ring in the suction casing is
even with the impeller wear ring of the first stage.
This visual check is sufficient because the exact
position of the shaft will be committed by
assembling the thrust bearing. Put the captive rings
[2530.2] in the shaft groove.

4) Now put from upwards the stage casing [1160.1]

together with the tightly sitting diffuser [1410.1] , o­ring [4610.7], interstage bush [1610] and casing
wear ring [1500.1] over the shaft [2100] and the
impeller [2200.1] down to the suction casing [1130].

5) Slight the interstage sleeve [2410] on the shaft,

taking care that it catches the key [6700.1]. When it
isn’t the case all parts on the shaft would be
displaced to the thrust bearing and after the pump is
complete assembled it would not turn.

6) Be sure to follow the reverse sequence of all parts

according to the one of dismantling. Watch the
numbers designated at dismantling.

7) After mounting the diffuser of the last stage [1410.2],

put on the cup springs [4263] and finally the

WXB USER INSTRUCTIONS ENGLISH - 07/14

discharge casing [1140] together with the bush
[1600].

The bush [1600] is screwed with
socket head cap screws [6579.3] to the discharge
casing [1140]. Don´t forget the o-ring [4610.6]

8) Slight the balance drum [6230] on the shaft, so that
the groove on it catches the key [6700.2]. Put the
retaining ring [2530] in the groove on the shaft,
slight the clamping ring [1240] over it and fix it with
the socket head cap screws [6579.2].

9) Now assembly the line bearing and thrust bearing
side including mechanical seals. Refer to chapter

6.9.2, 6.9.3 and 6.9.4.

10) Put on the o-rings [4610.9] to the discharge casing
[1140], the o-rings [4610.10] to the last stage casing
[1160.2] and the o-rings [4610.11] to the suction
casing [1130].

11) Now the hydraulic cartridge is fully assembled and
can be put into the casing [1100]. Use the clamp
stramp [3121.1] with the help of the stud [6572.4] for
final pulling off the hydraulic cartridge.

By putting the hydraulic
cartridge into the barrel take care of the o-rings
[4610.9, 4610.10, 4610.11].

12) Now tight crosswise the hex nuts [6581.1] of the
studs [6572.1]. For final torque refer to section

6.5, Fastener torques.

The pump can also be assembled by
putting the hydraulic parts piece per piece into
the barrel.

7.8.2 Assembly of shaft seal

Slide on the mechanical seal cartridge to the shaft
[2100] and fix it to the stuffing box housing [4110]
using hex nuts [6581.4] and studs [6572.2].

If the mechanical seal is
equipped with a pumping device, pay attention to the
correct sense of rotation of the same (line bearing
side is different from thrust bearing side).

1) For assembly of shaft seal use the reverse

procedure as described in section 6.7.4
„Dismantling of mechanical seal“. Afterwards follow
the instructions in section 6.9.3 „Assembly of the
thrust bearing side“ or section 6.9.4 „Assembly of
line bearing side“.

2) Replacing the mechanical seal extreme cleanness is

recommended. The sealing faces of the mechanical
seal must be free of scratches or other damages
and have to be cleaned once again before
assembly.

3) Before sliding the rotating parts on the shaft

respectively on the shaft sleeve, the fits must be
sufficiently lubricated with a molykote paste. Take
care that the sealing faces remain clean and no
grease touches them.

Page 41 of 51

4) For those mechanical seals equipped with single
springs, where a spring transmits the rotation from
the shaft to the rotating sealing-ring, it must be
considered that the spring must be wound up in the
right direction (transmitting power the spring shall be
contracted). In view from the spring-side to the
sealing-faces and the shaft is turning clockwise the
spring must be wound up counter clockwise and
vice-versa.

5) If a mechanical seal with pump ring for medium
circulation is used pay attention to the rotation of
pump and pump ring.

6) At assembling the seal end plate and distance plate
pay attention to the position of piping connections
for injection or quench (refer to shaft seal drawing).

7) After assembly of complete mechanical seal unit
on the shaft sleeve by paying attention to the
correct axially positioning of rotating mechanical
seal unit mount the complete mechanical seal unit
on the stuffing box housing [4110] using nuts
[6581.4] and studs [6572.2].

7.8.3 Assembly of the thrust bearing side

1) Use the reverse procedure to chapter 6.7.3,
Dismantling of the thrust bearing side.

2) Put the O-ring [4610.2] on the shaft. Slide the
sleeve [2471.1] on the shaft [2100] against the
shoulder. Heat up the thrust ball bearings [3013]
and slide them on to the shaft against the sleeve
[2471.1].

All sealing faces must be free of
damage, otherwise the lubrication oil would begin
leaking excessively.

3) Before assembling all O-rings have to be checked or
renewed. Special attention has to be drawn to the
O-rings of labyrinth ring [4330.1] and [4330.2] at
assembling into bearing cover. If one of the O-rings
is stuck here the performance of the labyrinth-type
seals will be reduced or they even will break in
operation. If seal rings are assembled for item
[4330.1] and [4330.2] pay attention to the correct
assembly.

4) The washer [2905.1] has to be fitted correctly and
fixed by lockwasher [6541.1] and shaft nut [2910.1].

5) Fixing the bearing side special attention has to be
drawn to the cylindrical pin [6811] of stuffing box
housing [4110] which has to grip into the flange of
the bearing side.

WXB USER INSTRUCTIONS ENGLISH - 07/14

All sealing faces must be free of
damage, otherwise the lubrication oil would begin
leaking excessively.

3) Before assembling all O-rings have to be checked or
renewed. Special attention has to be drawn to the
O-rings of labyrinth ring [4330.1] and [4330.3] at
assembling into bearing cover. If one of the O-rings
is stuck here the performance of the labyrinth-type
seals will be reduced or they even will break in
operation. If seal rings are assembled for item
[4330.1] and [4330.3] pay attention to the correct
assembly.
Attention: When the seal rings are equipped with a
dust lip, the space between the sealing lip and the
dust lip has to be filled with suitable grease. This
results lower wearing and a higher tightness.

4) The washer [2905.2] has to be fitted correctly and
fixed by lockwasher [6541.2] and shaft nut [2910.2].

5) Fixing the bearing side special attention has to be
drawn to the cylindrical pin [6811] of stuffing box
housing [4110] which has to grip into the flange of
the bearing side.

7.8.5 Final assembly

1) Connect suction and discharge piping

Check alignment of flanges to avoid

distortion based on too high flange forces.

2) See section 5.1, Precommissioning procedure for
precommissioning.

7.8.4 Assembly of the line bearing side

1) Use the reverse procedure to chapter 6.7.2,
Dismantling of the line bearing side.

2) Put the O-ring [4610.8] on the shaft. Slide the
sleeve [2471.2] on the shaft [2100] against the
shoulder. Heat up the inner race of the roller
bearing [3012] and push it on to the shaft against
the sleeve [2471.2].

Page 42 of 51

8.0 AUXILIARIES

WXB USER INSTRUCTIONS ENGLISH - 07/14

8.1.2 Dual Mechanical Seal unpressurized with
API–Plan 23+72+76

8.1 Seal and seal systems

8.1.1 Single Mechanical Seal with API–Plan 11+61

Refer to mechanical seal drawing and
auxiliary piping drawing.
The pump is equipped with a single mechanical seal.
The cartridge design allows to change the
mechanical seal without taking it apart.

Try to turn the rotor by hand.If the
rotor cannot be turned, the pump must be
disassembled, refer to section 6.7.1 Dismantling

WXB.

Actions after start up:
Check all connections to the seal gland and the
mechanical seal itself against leakage. It is usual that
at the seal faces a small leakage occurs after start
up, which decreases with the time of operation and
should stop after the seal is run in. Check the
temperature of the seal gland. I slight increase of
temperature may be observed during the run in
period. The mechanical seal is flushed by an API
Plan 11 and the temperature at the seal gland should
be max. 10 °C (18 °F) above the pumped liquid
temperature, unless otherwise specified by
mechanical seal supplier.

In Plan 11, product is routed from the pump
discharge via an orifice to the seal chamber to
provide cooling for the seal and to vent air or vapors
from the seal chamber. Fluid then flows from the seal
cavity back into the process stream.

API Plan 61 has tapped and plugged connections for
the purchaser´s use. Typically this plan is used when
the purchaser is to provide fluid (such as steam, gas, or
water) to an external sealing device.

Refer to the GA - drawing for the
required quench medium, pressure and flow.

Disassembly of the seal cartridge
is only allowed by authorized personal. Contact
Flowserve for any service of the mechanical seal. We
recommend to have a spare cartridge seal on stock
for easy replacement.

Refer to mechanical seal drawing and
auxiliary piping drawing.
The pump is equipped with a dual mechanical seal.
The cartridge design allows to change the
mechanical seal without taking it apart.

The seal cartridge consists of a contacting wet inner
seal and a dry containment seal. A buffer gas is used
to sweep inner seal leakage away from the outer seal
into a collection system and/or provide dilution of the
leakage, so that emissions from the containment seal
are reduced.
The plan 72 system is intended to function as follows:
The barrier gas first flows through an isolation block
valve and check valve provided by the purchaser. It
then enters a system, usually mounted on a plate or
panel, provided by the seal vendor. An inlet block
valve on the panel is followed by a 10 µm (0.0004 in.)
filter coalescer (if specified) to remove any particles
and liquid that might be present. The gas then flows
through a back pressure regulator (if specified) which
is set at least 0.5 bar (7 psi) above atmospheric
pressure. Next comes an orifice to provide flow
regulation followed by a flow indicator to measure
flow. The pressure indicator is used to ensure the
pressure is not above the seal chamber pressure.
The last elements on the panel are a check valve and
block valve. Buffer gas is then routed to the seal
using tubing. A containment seal vent (CSV) and
drain (CSD) are also located on the gland.

The inner mechanical seal is flushed by an
API Plan 23.

Try to turn the rotor by hand.If the
rotor cannot be turned, the pump must be
disassembled, refer to section 6.7.1 Dismantling

WXB.

Actions after start up:
Check all connections to the seal gland and the
mechanical seal itself against leakage. It is usual that
at the seal faces a small leakage occurs after start
up, which decreases with the time of operation and
should stop after the seal is run in. Check the
temperature of the seal gland. I slight increase of
temperature may be observed during the run in
period. The mechanical seal is flushed by an API
Plan 23 and the temperature at the seal gland should
be below the pumped liquid temperature (refer to
mechanical seal drawing for temperature limit).

Plan 23 is the plan of choice for all hot water
services, and it is also disirable in many hydrocarbon
and chemical services where it is necessary to cool

Page 43 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

the fluid establish the required margin between fluid
vapor pressure (at the seal chamber temperature)
and seal chamber pressure. In a Plan 23, the cooler
only removes seal face-generated heat plus heat
soak from the process.

Plan 76 is suitable only for fluids, where no
condensation of the inner seal leakage or from the
collection system will occur.
Leakage from the inner mechanical seal is restricted
from escape by the containment seal and goes out
the containment seal vent. An orifice in the outlet line
of the collector restricts flow such that high leakage of
the inner seal will cause a pressure increase and
trigger the PSH set at a gauge pressure of 0.7 bar
(10 psi). The block valve in the outlet serves to isolate
the system for maintenance. It may also be used to
test the inner seal by closing while the pump is in
operation and noting the time/pressure buildup
relationship in the collector. If specified, drain
connection on the piping harness may be used to
inject nitrogen or other gas for the purpose of testing
the containment seal as well as for checking for any

Open all necessary valves in the

liquid buildup.

Disassembly of the seal cartridge
is only allowed by authorized personal. Contact
Flowserve for any service of the mechanical seal. We
recommend to have a spare cartridge seal on stock
for easy replacement.

mechanical seals with a liquid barrier fluid between
them. The barrier fluid is contained in a piston type
accumulator. Inner seal leakage will be barrier fluid
leakage into the product. There will always be some
leakage (max.5 ml/hour).
The leakage rate is monitored by monitoring the seal
pot level. The product must be able to accommodate
a small amount of contamination from the barrier
fluid. The seal pot pressure must be maintained at
the proper level. If the seal pot pressure drops, the
system will begin to operate like a Plan 52, or
unpressurized dual seal, which does not offer the
same level of sealing integrity. Specifically, the inner
seal leakage direction will be reversed and the barrier
fluid will, over time, become contaminated with the
process fluid with the problems that result, including
possible seal failure.

Fill the seal system with a suitable

barrier buffer fluid (refer to lubrication table).

cooling and auxiliary piping and check the flow.
API Plan 61 has tapped and plugged connections for

the purchaser´s use. Typically this plan is used when
the purchaser is to provide fluid (such as steam, gas, or
water) to an external sealing device.

8.1.3 Dual Mechanical Seal pressurized with
API–Plan 53c+61

Refer to mechanical seal drawing and
auxiliary piping drawing.
The pump is equipped with a dual mechanical seal in
face to back configuration, back to back configuration
or face to face configuration.

Try to turn the rotor by hand.If the
rotor cannot be turned, the pump must be
disassembled, refer to section 6.7.1 Dismantling

WXB.

The mechanical seal requires no adjustment
anymore. Check if the mounting plates are already
swung out.
Actions after start up:
Check all connections to the seal gland and the
mechanical seal itself against leakage. Check the
temperature of the seal gland. I slight increase of
temperature may be observed during the run in
period.

Plan 53 pressurized dual seal systems are used in
services where no leakage to atmosphere can be
tolerated. A Plan 53c system consists of dual

Refer to the GA - drawing for the

required flushing fluid, pressure and flow.

Disassembly of the seal cartridge
is only allowed by authorized personal. Contact
Flowserve for any service of the mechanical seal. We
recommend to have a spare cartridge seal on stock
for easy replacement.

8.1.4 API Plan K

Refer to auxiliary piping drawing.
The pump is equipped with an API plan K, cooling to
bearing housing with parallel flow to seal heat
exchanger.
Open all the valves in the cooling line before start up
the pump.

Check cooling flow at the
installed flow indicator. If required adjust flowrate with
the flow control valve.

Refer to the GA - drawing for the
required cooling flow and pressure.

Page 44 of 51

8.2 Changing of mechanical seal

1) Completely drain the pump by using the drain
connection. By pumping explosive or toxic media,
flush the system with Nitrogen.

2) Secure the mechanical seal by putting the
mounting plates into the groove of the shaft
sleeve. Loose the grub screws, and disconnect
the seal piping.

Drain the seal system, if

applicable.

3) For disassembly refer to section 6.7.2, 6.7.3,

Dismantling of the line bearing side, Dismantling
of the thrust bearing side.

4) For assembly refer to section 6.9.3, 6.9.4,

Assembly of the thrust bearing side, Assembly of
the line bearing side.

WXB USER INSTRUCTIONS ENGLISH - 07/14

Page 45 of 51

⇓⇓⇓⇓

PROBABLE CAUSES

POSSIBLE REMEDIES

B. MECHANICAL TROUBLES

9.0 FAULTS; CAUSES AND REMEDIES

FAULT SYMPTOM
Pump overheats and seizes

Bearings have short life

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump vibrates or is noisy

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal has short life

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal leaks excessively

⇓⇓⇓⇓

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



⇓⇓⇓⇓

Pump requires excessive power

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump loses prime after starting

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient pressure developed

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient capacity delivered

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

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

  



 



 



 



Pump does not deliver liquid

⇓⇓⇓⇓

A. SYSTEM TROUBLES



Pump not primed. Check complete filling



Pump or suction pipe not completely filled with

liquid.
Suction lift too high or level too low.
Excessive amount of air or gas in liquid. Check and purge from pipes

Air or vapour pocket in suction line. Check suction line design for pockets
Air leaks into suction line. Check airtight pipe then joints and gaskets
Air leaks into pump through mechanical seal,

sleeve joints, casing joint or pipe lugs.
Foot valve too small. Investigate replacing the foot valve
Foot valve partially clogged. Clean foot valve
Inlet of suction pipe insufficiently submerged. Check cut out system design

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. Consult Flowserve
Viscosity of liquid differs from that for which

designed.
Operation at very low capacity. Measure value and check minimum permitted

Operation at high capacity.

Misalignment due to pipe strain.

Improperly designed foundation.
Shaft bent. Check shaft runouts within acceptable values

Rotating part rubbing on stationary part
internally.

Bearings worn Replace bearings
Wearing ring surfaces worn. Replace worn wear ring/ surfaces
Impeller damaged or eroded. Replace impeller and check reason
Leakage under sleeve due to joint failure. Replace joint and check for damage

Mechanical seal improperly installed.

WXB USER INSTRUCTIONS ENGLISH - 07/14

Check and complete filling
Check NPSHa>NPSHr, proper submergence,

losses at strainers / fittings

Check airtight assembly then joints and
gaskets

Check discharge head and head losses in
discharge pipe at the valve settings. Check
back pressure is not too high

Throttle at discharge valve or ask Flowserve if
the impeller can be trimmed

Consult Flowserve

Measure value and check maximum
permitted

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

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

Check for signs of this and consult Flowserve
if necessary

Check alignment of faces or damaged parts
and assembly method used

Page 46 of 51

⇓⇓⇓⇓

PROBABLE CAUSES

POSSIBLE REMEDIES

C. ELECTRICAL TROUBLES

FAULT SYMPTOM
Pump overheats and seizes

Bearings have short life

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump vibrates or is noisy

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal has short life

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal leaks excessively

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump requires excessive power

⇓⇓⇓⇓

⇓⇓⇓⇓

Pump loses prime after starting

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient pressure developed

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓



    

    


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

  

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  

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



WXB USER INSTRUCTIONS ENGLISH - 07/14

Insufficient capacity delivered

Pump does not deliver liquid

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

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. Check and consult Flowserve
Abrasive solids in liquid pumped. Check and consult Flowserve

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

Damaged bearings due to contamination.

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



Motor running too slow, Check motor terminal box connections



Consult Flowserve
Check misalignment and correct if necessary.

If alignment satisfactotry check bearings for
excessive wear

Check mechanical seal condition and source
of dry running and repair

Check method of assembly, possible damage
or state of cleanliness during assembly

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

Check contamination source and replace
damaged bearings

Page 47 of 51

10.0 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.

11.0 OTHER RELEVANT
DOCUMENTATION AND MANUALS

11.1 Supplementary user instructions

Supplementary instructions 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 in the Data Book. If
further copies of these are required they should be
obtained from the supplier 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.

WXB USER INSTRUCTIONS ENGLISH - 07/14

11.2 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.

11.3 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:
Pump Handbook, 2nd edition, Igor J. Karassik et al,
McGraw-Hill Inc., New York, 1993.

Reference 3:

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

Reference 4:

ANSI B31.3 - Process Piping.

Page 48 of 51

11.4 Abbreviations

Quantity ISO unit

ISO unit

abbreviation

WXB USER INSTRUCTIONS ENGLISH - 07/14

Multiplication

Factor 1

US unit

US unit

Abbreviation

Area

Capacity or
Flow rate

Force Newton N 0.2248 pound.force lbf

Head metre m 3.28084 feet ft

Heat Energy kilojoule kJ 0.9478

Length

Mass

Moment of
Interia

Noise 4 decibel dBA

Power kilowatt kW 1.34102 horsepower hp

Pressure 2 bar bar 14.5 pounds/in.² psi

Rotational
Speed

square metre

square centimetre

Cubic

metre/hour

metre

millimetre

micrometre

kilogram

gram

kilogram

square metre

revs per minute r/min

m²

cm²

m³/h 4.4033

m

mm

µm

kg

g

kg.m² 23.73

10.764

0.155

3.28084

0.03937

0.00003937

2.20462

0.035274

square feet

square inch

US Gallons/

minute

British

thermal unit

feet
inch
inch

pounds
ounces

pounds

square feet

ft²

in.²

US gpm

Btu

ft
in.
in.

lb.

oz.

lb.ft²

Stress Newton/mm² N/mm² 145.0 pounds/in.² psi

Temperature

Torque Newton.metre Nm 0.7376 pound.feet lbf.ft

Unbalance gram millimetre g.mm 0.001389 ounce-inch oz-in.

Velocity

Vibration 3

Viscosity

Volume

1

multiply the ISO unit by the multiplication factor to obtain US units

2

where pressure is not stated to be absolute it is gauge

3

where not stated to be peak it is r.m.s.

4

sound pressure level LpA, re 1m - 20microPa, or sound power level LwA re 1 pW when sound power is

degrees

Celsius

metre/second

millimetre/second

millimetre/

second

square millimetre/

second or centiStoke

cubic metre

litre

°C (1.8 x °C) + 32

m/s

mm/s

mm/s

cSt

m³

l

3.28084

0.03937

0.03937

264.2

33.81

degrees

Fahrenheit

feet/second

inches/second

inches/
second

US Gallons

fluid ounce

°F

ft/sec

in./sec

in./sec

US gal.

Fl.oz.

applicable

Page 49 of 51

OUR ADRESS

Flowserve (Austria) GmbH

MESSAGES CAN BE LEFT ALSO ON OUR ANSWERING MACHINE

Please quote your service:

WXB USER INSTRUCTIONS ENGLISH - 07/14

AFTERMARKET DIRECTORY

Tel: +43 / 2236 / 31530
Industriestraße B/6 Fax: +43 / 2236 / 33430
A-2345 Brunn/Geb., AUSTRIA Mail: [e-mail]

IMPORTANT NOTES:

PLEASE NOTE, THAT WARRANTY EXPIRES:

- USE OF NON GENUINE FLOWSERVE AUSTRIA PARTS FOR MAINTENANCE AND REPAIRS

- NO USE OF OUR SERVICE PERSONAL IN CASE OF REPAIRS DURING WARRANTY PERIOD

RECOMMENDATION:

-PLEASE ASK FOR OUR SPECIAL RATES

- PLEASE ALSO ASK OUR SERVICE PERSONAL ABOUT REPAIRING AND SERVICING YOUR
PUMPS AFTER THE WARRANTY PERIOD

Name of Company: ………………………… Pumpdata:
Contact person:.……………………….. Type: ………………….

Telephone: …………….…………........... Serialno.: …….......…….....

Fax: ...…………………………………....

e-mail: ………………………………………
Country: ………………………………………

Page 50 of 51

WXB USER INSTRUCTIONS ENGLISH - 07/14

Your Flowserve factory contacts:

Flowserve (Austria) GmbH
Industriestraße B6
2345 Brunn am Gebirge
Austria

Telefon: [phone]
Fax: [phone]
E.mail: [e-mail]

FLOWSERVE REGIONAL
SALES OFFICES:

USA and Canada

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

Europe, Middle East, Africa

Flowserve Corporation
Parallelweg 13
4878 AH Etten-Leur
The Netherlands
Telephone: [phone]

Latin America

Flowserve Corporation
Martín Rodriguez 4460
B1644CGN-Victoria-San

Fernando
Buenos Aires, Argentina
Telephone: [phone]
Telefax: [phone]

Asia Pacific

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