USER INSTRUCTIONS

Worthington® WUC centrifugal pumps Installation

Operation
Vertical, Multistage Can Type Maintenance
Original Instructions
PCN=71569264, 71569265, 71569266, 71569267 05-16 (E)
 WUC USER INSTRUCTIONS ENGLISH - 05/16

CONTENTS 6.6 SETTING IMPELLER CLEARANCE............................ 39

PAGE 6.7 DISASSEMBLY ........................................................ 39
6.8 EXAMINATION OF PARTS........................................ 43
1.0 INTRODUCTION AND SAFETY ............................ 3 6.9 ASSEMBLY ............................................................. 44
1.1 GENERAL ................................................................. 3 7.0 AUXILIARIES ......................................................... 45
1.2 CE MARKING AND APPROVALS ................................ 3
1.3 DISCLAIMER ............................................................. 3 7.1 SEAL AND SEAL SYSTEMS ..................................... 45
1.4 COPYRIGHT ............................................................. 3 8.0 FAULTS; CAUSES AND REMEDIES ................ 50
1.5 DUTY CONDITIONS ................................................... 3
1.6 SAFETY .................................................................... 4 9.0 CERTIFICATION .................................................... 52
1.7 W ARNING LABEL ...................................................... 8
1.8 SPECIFIC MACHINE PERFORMANCE ......................... 9 10.0 OTHER RELEVANT DOCUMENTATION AND
1.9 NOISE LEVEL ............................................................ 9 MANUALS ..................................................................... 52
1.10 CE DECLARATION ............................................... 11
10.1 SUPPLEMENTARY USER INSTRUCTIONS.............. 52
2.0 TRANSPORT AND STORAGE............................ 12 10.2 CHANGE NOTES................................................... 52
2.1 CONSIGNMENT RECEIPT AND UNPACKING............. 12 10.3 ADDITIONAL SOURCES OF INFORMATION ............ 52
2.2 HANDLING .............................................................. 12 10.4 ABBREVIATIONS .................................................. 53
2.3 LIFTING .................................................................. 12
2.4 STORAGE ............................................................... 13
2.5 RECYCLING AND END OF PRODUCT LIFE ............... 13
3.0 DESCRIPTION........................................................ 13
3.1 CONFIGURATION .................................................... 13
3.2 NOMENCLATURE .................................................... 14
3.3 DESIGN OF MAJOR PARTS ..................................... 14
3.4 PERFORMANCE AND OPERATING LIMITS ............... 14
4.0 INSTALLATION...................................................... 14
4.1 LOCATION .............................................................. 15
4.2 PART ASSEMBLIES ................................................ 15
4.3 FOUNDATION ......................................................... 15
4.4 INITIAL ALIGNMENT................................................. 18
4.5 PIPING.................................................................... 18
4.6 ELECTRICAL CONNECTIONS................................... 24
4.7 FINAL SHAFT ALIGNMENT CHECK ........................... 24
4.8 PROTECTION SYSTEMS.......................................... 24
5.0 COMMISSIONING START-UP, OPERATION
AND SHUTDOWN ........................................................ 24
5.1 PRECOMMISSIONING PROCEDURE ........................ 24
5.2 PUMP LUBRICANTS ................................................ 25
5.3 IMPELLER CLEARANCE ........................................... 31
5.4 DIRECTION OF ROTATION ...................................... 32
5.5 GUARDING ............................................................. 32
5.6 PRIMING AND AUXILIARY SUPPLIES ....................... 32
5.7 COOL DOWN PROCEDURE FOR CRYOGENIC
SERVICE ....................................................................... 33
5.8 STARTING THE PUMP ............................................. 34
5.9 OPERATION............................................................ 34
5.10 STOPPING AND SHUTDOWN ................................ 34
5.11 HYDRAULIC, MECHANICAL AND ELECTRICAL DUTY
..................................................................................... 34
6.0 MAINTENANCE ..................................................... 35
6.1 GENERAL ............................................................... 35
6.2 MAINTENANCE SCHEDULE ..................................... 36
6.3 SPARE PARTS ........................................................ 36
6.4 RECOMMENDED SPARES ....................................... 37
6.5 TIGHTENING TORQUE & TIGHTENING SEQUENCE .. 37

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To establish Approvals and if the product itself is CE

1.0 INTRODUCTION AND SAFETY Marked check the serial number plate and the
Certification.
1.1 General 1.3 Disclaimer
Information in these User Instructions is believed
These Instructions must always be kept to be reliable. In spite of all the efforts of
close to product's operating location or directly Flowserve Corporation to provide sound and all
with the product. necessary information the content of this manual
may appear insufficient and is not guaranteed by
Flowserve's products are designed, developed and Flowserve as to its completeness or accuracy.
manufactured with state-of-the-art technologies in
modern facilities. The unit is produced with great care Flowserve manufactures products to exacting
and commitment to continuous quality control, International Quality Management System Standards
utilising sophisticated quality techniques, and safety as certified and audited by external Quality
requirements. Assurance organisations. Genuine parts and
Flowserve is committed to continuous quality accessories have been designed, tested and
improvement and being at service for any further incorporated into the products to help ensure their
information about the product in its installation and continued product quality and performance in use. As
operation or about its support products, repair and Flowserve cannot test parts and accessories sourced
diagnostic services. from other vendors the incorrect incorporation of such
These instructions are intended to facilitate parts and accessories may adversely affect the
familiarization with the product and its permitted use. performance and safety features of the products. The
Operating the product in compliance with these failure to properly select, install or use authorised
instructions is important to help ensure reliability in Flowserve parts and accessories is considered to be
service and avoid risks. The instructions may not take misuse. Damage or failure caused by misuse is not
into account local regulations; ensure such covered by Flowserve's warranty. In addition, any
regulations are observed by all, including those modification of Flowserve products or removal of
installing the product. Always coordinate repair original components may impair the safety of these
activity with operations personnel, and follow all plant products in their use.
safety requirements and applicable safety and health
laws/regulations. 1.4 Copyright
All rights reserved. No part of these instructions may
These instructions must be read prior to be reproduced, stored in a retrieval system or
installing, operating, using and maintaining the transmitted in any form or by any means without prior
equipment in any region worldwide. The permission of Flowserve.
equipment must not be put into service until all
the conditions relating to safety, noted in the 1.5 Duty conditions
instructions, have been met. Failure to follow and
apply the present user instructions is considered This product has been selected to meet the
to be misuse. Personal injury, product damage, specifications of your purchaser order. The
delay or failure caused by misuse are not covered acknowledgement of these conditions has been sent
by the Flowserve warranty. 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 The product must not be operated beyond
equipment put into service within certain regions of the parameters specified for the application. If
the world shall conform with the applicable CE there is any doubt as to the suitability of the
Marking Directives covering Machinery and, where product for the application intended, contact
applicable, Low Voltage Equipment, Electromagnetic Flowserve for advice, quoting the serial number.
Compatibility (EMC), Pressure Equipment Directive
(PED) and Equipment for Potentially Explosive If the conditions of service on your purchase order
Atmospheres (ATEX). are going to be changed (for example liquid pumped,
Where applicable the Directives, and any additional temperature or duty) it is requested that the user
Approvals, cover important safety aspects relating to seeks Flowserve´s written agreement before start
machinery and equipment and the satisfactory up.
provision of technical documents and safety
instructions. Where applicable this document
incorporates information relevant to these Directives.

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1.6.2 Personnel qualification and training

1.6 Safety All personnel involved in the operation, installation,
inspection and maintenance of the unit must be
1.6.1 Summary of safety markings qualified to carry out the work involved. If the
personnel in question do not already possess the
These user instructions contain specific safety
necessary knowledge and skill, appropriate training
markings where non-observance of an instruction
and instruction must be provided. If required the
would cause hazards. The specific safety markings
operator may commission the manufacturer / supplier
are:
to provide applicable training.
Always co-ordinate repair activity with operations and
health and safety personnel, and follow all plant
This symbol indicates electrical safety instructions safety requirements and applicable safety and health
where non-compliance will involve a high risk to laws/regulations.
personal safety or the loss of life.
1.6.3 Safety action
This symbol indicates safety instructions This is a summary of conditions and actions to
where non-compliance would affect personal safety help prevent injury to personnel and damage to
and could result in loss of life. the environment and to equipment. For products
used in potentially explosive atmospheres
section 1.6.4 also applies.
This symbol indicates "hazardous and toxic
fluid" safety instructions where non-compliance would
affect personal safety and could result in loss of life. PREVENT EXCESSIVE
EXTERNAL PIPE LOAD
Do not use pump as a support for piping. Do not
This symbol indicates safety mount expansion joints so that their force, due to
instructions where non-compliance will involve some internal pressure, acts on the pump flange.
risk to safe operation and personal safety and would
damage the equipment or property.
ONLY CHECK DIRECTION OF
MOTOR ROTATION WITH COUPLING ELEMENT/
This symbol indicates "strong magnetic PINS REMOVED
field" safety instructions where non-compliance would Starting in reverse direction of rotation will damage
affect personal safety, pacemakers, instruments or the pump.
stored data sensitive to magnetic fields.
ENSURE CORRECT
This symbol indicates explosive atmosphere LUBRICATION
marking according to ATEX. It is used in safety (See section 5 Commissioning, startup, operation and
instructions where non-compliance in the hazardous shutdown.)
area would cause the risk of an explosion.
START THE PUMP WITH
This symbol is used in safety instructions to OUTLET VALVE PART OPENED
remind not to rub non-metallic surfaces with a dry (Unless otherwise instructed at a specific point in the
cloth; ensure the cloth is damp. It is used in safety user instructions.)
instructions where non-compliance in the hazardous This is recommended to avoid the risk of overloading
area would cause the risk of an explosion. and damaging the pump motor at full or zero flow.
Pumps may be started with the valve further open
The sign is not a safety symbol but only on installations where this situation cannot
indicates an important instruction in the assembly occur. Pump outlet valve shall be adjusted to comply
process. with the duty following the run-up process (See
section 5 Commissioning, startup, operation and
shutdown).
This symbol indicates potential risks
connected with extremely high temperatures.
START THE PUMP WITH
OUTLET VALVE FULLY OPEN
This symbol indicates potential risks This is recommended to avoid the risk of overloading
connected with extremely low temperatures. 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

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run-up process (See section 5 Commissioning, condition these are extremely dangerous and skin
startup, operation and shutdown). contact must be avoided.

NEVER RUN THE PUMP DRY GUARDS MUST NOT BE REMOVED WHILE
PUMP IS OPERATIONAL
INLET VALVES TO BE FULLY
OPEN WHEN PUMP IS RUNNING THERMAL SHOCK
Running the pump at zero flow or below the Rapid changes in the temperature of the liquid within
recommended minimum flow continuously will cause the pump can cause thermal shock, which can result
damage to the seal. in damage or breakage of components and should be
avoided.
DO NOT RUN THE PUMP AT
ABNORMALLY HIGH OR LOW FLOW RATES NEVER APPLY HEAT TO REMOVE
Operating at a flow rate higher than normal or at a IMPELLER
flow rate with no back pressure on the pump may Trapped lubricant or vapour could cause an
overload the motor and cause cavitation. Low flow explosion.
rates may cause a reduction in pump/bearing life,
overheating of the pump, instability and HOT AND COLD PARTS
cavitation/vibration. If hot or freezing components or auxiliary heating
supplies can present a danger to operators, they
When ambient temperatures are must be shielded to avoid accidental contact. If
likely to drop below freezing point, the pump and any complete protection is not possible, the machine
cooling and flushing arrangements must be drained access must be limited to maintenance staff only.
or otherwise protected. Note: bearing housings must not be insulated and
drive motors and bearings may be hot.
HANDLING COMPONENTS If the temperature is greater than 68 °C (155 °F) or
Many precision parts have sharp corners and the below 5 °C (41 °F) in a restricted zone, or exceeds
wearing of appropriate safety gloves and equipment local regulations, action as above shall be taken.
is required when handling these components. To lift
heavy pieces above 25 kg (55 lbs) use a crane 1.6.4 Products used in potentially explosive
corresponding to the mass and in accordance with atmospheres
current local regulations.
Measures are required to:
• Avoid excess temperature
NEVER DO MAINTENANCE WORK WHILST THE • Prevent build up of explosive mixtures
UNIT IS CONNECTED TO POWER • Prevent the generation of sparks
• Prevent leakages
HAZARDOUS LIQUIDS • Maintain the pump to avoid hazard
When the pump is handling hazardous liquids care
must be taken to avoid exposure to the liquid by The following instructions for pumps and pump units
appropriate sitting of the pump, limiting personnel when installed in potentially explosive atmospheres
access and by operator training. If the liquid is must be followed to help ensure explosion protection.
flammable and/or explosive strict safety procedures Both electrical and non-electrical equipment must
must be applied. meet the requirements of European Directive
Gland Packing must not be used when pumping 94/9/EC.
hazardous liquids.
1.6.4.1 Scope of compliance

DRAIN PUMP AND ISOLATE PIPEWORK

BEFORE DISMANTLING THE PUMP Use equipment only in the zone for which it is
The appropriate safety precautions should be taken appropriate. Always check that the driver, drive
where the pumped liquids are hazardous. 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
FLUORO-ELASTOMERS (When fitted)
installed.
When a pump has experienced temperatures over
250 °C (482 ºF), partial decomposition of fluoro-
Where Flowserve has supplied only the bare shaft
elastomers (example: Viton) will occur. In this
pump, the Ex rating applies only to the pump. The

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party responsible for assembling the pump set shall

select the coupling, driver and any additional Maximum
Temperature limit of liquid
equipment, with the necessary CE Certificate/ Temperature handled (* depending on
surface
class to material and construction
Declaration of Conformity establishing it is suitable for EN 13463-1
temperature
variant - check which is
the area in which it is to be installed. permitted
lower)
T6 85 °C (185 °F) Consult Flowserve
The output from a variable frequency drive (VFD) can T5 100 °C(212 °F) Consult Flowserve
cause additional heating affects in the motor and so, T4 135 °C (275 °F) 115 °C (239 °F) *
for pump sets with a VFD, the ATEX Certification for T3 200 °C (392 °F) 180 °C (356 °F) *
T2 300 °C (572 °F) 275 °C (527 °F) *
the motor must state that it covers the situation where T1 450 °C (842 °F) 400 °C (752 °F) *
electrical supply is from the VFD. This is particular
requirement still applies even if the VFD is in a safe * The table only takes the ATEX temperature class into
area. consideration. Pump design or material, as well as component
design or material, may further limit the maximum working
1.6.4.2 Marking temperature of the liquid.

An example of ATEX equipment marking is shown The temperature rise at the seals and bearings and
below. The actual classification of the pump will be due to the minimum permitted flow rate is taken into
engraved on the nameplate. account in the temperatures stated.

The responsibility for compliance with the

II 2 GD c IIC135ºC (T4) specified maximum liquid temperature is with the
plant operator.
Equipment Group Temperature classification “Tx” is used when the
I = Mining liquid temperature varies and when the pump is
II = Non-mining required to be used in differently classified potentially
Category explosive atmospheres. In this case the user is
2 or M2 = High level protection responsible for ensuring that the pump surface
3 = normal level of protection temperature does not exceed that permitted in its
actual installed location.
Gas and/or Dust
G = Gas; D= Dust
Do not attempt to check the direction of rotation with
c = Constructional safety the coupling element/pins fitted due to the risk of
(in accordance with EN13463-5) severe contact between rotating and stationary
components.
b = Control of ignition source
(in accordance with EN13463-6)
Where there is any risk of the pump being run against
Gas Group
a closed valve generating high liquid and casing
IIA – Propane (Typical)
external surface temperatures it is recommended that
IIB – Ethylene (Typical)
users fit an external surface temperature protection
IIC – Hydrogen (Typical)
device.
Maximum surface temperature (Temperature Class)
(see section 1.6.4.3) Avoid mechanical, hydraulic or electrical overload by
using motor overload trips or a Power Monitor and
1.6.4.3 Avoiding excessive surface temperatures make routine vibration monitoring.
In dirty or dusty environments, regular checks must
be made and dirt removed from areas around close
ENSURE THE EQUIPMENT TEMPERATURE clearances, bearing housings and motors.
CLASS IS SUITABLE FOR THE HAZARD ZONE
Level control shall be fitted in the sump to prevent
Pumps have a temperature class as stated in the liquid level dropping below minimum acceptable.
ATEX Ex rating on the nameplate. These are based
on an ambient in the range of -80 to +55 ºC (-112 to It is recommended that a Service Plan with vibration
+131 ºF); refer to Flowserve for ambient monitoring is adopted, alternatively the user should fit
temperatures outside this range for this product. external bearing housing surface temperature
protection device(s) to ensure the temperature class,
The surface temperature on the pump is influenced i.e. maximum surface temperature, is not exceeded.
by the temperature of the liquid handled. The For external flush the flow should be monitored.
maximum permissible liquid temperature depends on
the ATEX temperature class and must not exceed the
values in the table that follows.

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1.6.4.4 Preventing the build up of explosive

mixtures Where there is the potential hazard of a loss of a seal
barrier fluid or external flush, the fluid must be
monitored.
ENSURE THE PUMP IS PROPERLY FILLED
AND VENTED AND DOES NOT RUN DRY If leakage of liquid to atmosphere can result in a
hazard, the installation of a liquid detection device is
Ensure the pump and relevant suction and discharge recommended.
pipeline system is totally filled with liquid at all times
during the pump operation, so that an explosive 1.6.4.6 Maintenance to the centrifugal pump to
atmosphere is prevented. In addition it is essential to avoid the hazard
make sure that seal chambers, auxiliary shaft seal
systems and any heating and cooling systems are
properly filled. CORRECT MAINTENANCE IS REQUIRED
TO AVOID POTENTIAL HAZARDS WHICH GIVE A
If the operation of the system cannot avoid this RISK OF EXPLOSION
condition the fitting of an appropriate Dry Run The responsibility for compliance with
protection device is recommended (eg liquid maintenance instructions is with the plant
detection or a Power Monitor). operator.

To avoid potential hazards from fugitive emissions of To avoid potential explosion hazards during
vapour or gas to atmosphere the surrounding area maintenance, the tools, cleaning and painting
must be well ventilated. materials used must not give rise to sparking or
adversely affect the ambient conditions. Where there
1.6.4.5 Preventing sparks is a risk from such tools or materials, maintenance
must be conducted in a safe area.
It is recommended that a maintenance plan and
To prevent a potential hazard from mechanical
schedule is adopted (see section 6, Maintenance).to
contact the coupling guard must be non-sparking and
include the following.
anti-static.
a) Any auxiliary systems installed must be
To avoid the potential hazard from random induced
monitored, if necessary, to ensure they function
current generating a spark the earth contact on the
correctly.
baseplate must be used.
b) Gland packings must be adjusted correctly to
give visible leakage and concentric alignment of
Avoid electrostatic charge: do not rub non- the gland follower to prevent excessive
metallic surfaces with a dry cloth; ensure cloth is temperature of the packing or follower.
damp. c) Check for any leaks from gaskets and seals. The
correct functioning of the shaft seal must be
The coupling must be selected to comply with checked regularly
94/9/EC and correct alignment must be maintained. d) Check bearing lubricant level, and if the hours run
show a lubricant change is required.
1.6.4.5 Preventing leakage e) Check that the duty condition is in the safe
operating range for the pump.
f) Check vibration, noise level and surface
The pump must only be used to handle liquids temperature at the bearings to confirm
for which it has been approved to have the correct satisfactory operation.
corrosion resistance. g) Check dirt and dust is removed from areas
around close clearances, bearing housings and
Avoid entrapment of liquid in the pump and motors.
associated piping due to closing of suction and h) Check coupling alignment and re-align if
discharge valves, which could cause dangerous necessary.
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.

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1.7 Warning label

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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.

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Octave MID BAND frequency [Hz]

dB(A) Value 63 125 250 500 1K 2K 4K 8K
Motorstand 0
1450 rpm 57 48 52 52 50 50 50 48 43
1760 rpm 59 50 54 54 52 52 52 50 45
2900 rpm 61 52 56 56 54 54 54 52 47
3600 rpm 63 54 58 58 56 56 56 54 49
Motorstand 1
3000 rpm 70 60 64 64 62 62 62 60 55
1500 rpm 64 54 58 58 56 56 56 54 49
3600 rpm 72 62 66 66 64 64 64 62 57
1800 rpm 64 54 58 58 56 56 56 54 49
Motorstand 3
3000 rpm 72 62 66 66 64 64 64 62 57
1500 rpm 66 56 60 60 58 58 58 56 51
3600 rpm 74 64 68 68 66 66 66 64 59
1800 rpm 67 57 61 61 59 59 59 57 52
Motorstand 4
3000 rpm 73 63 67 67 65 65 65 63 58
1500 rpm 68 58 62 62 60 60 60 58 53
1800 rpm 69 59 63 63 61 61 61 59 54
Motorstand 5
3000 rpm 74 64 68 68 66 66 66 64 59
1500 rpm 69 59 63 63 61 61 61 59 54
1800 rpm 70 60 64 64 62 62 62 60 55
Motorstand 6
1500 rpm 70 60 64 64 62 62 62 60 55
1800 rpm 71 61 65 65 63 63 63 61 56
Motorstand 7
1500 rpm 71 61 65 65 63 63 63 61 56
1800 rpm 72 62 66 66 64 64 64 62 57
Motorstand 8
1500 rpm 73 63 67 67 65 65 65 63 59
1800 rpm 74 64 68 68 66 66 66 64 60

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.
dB correction for combining noises (pump+motor)
Difference between two
0 1 2 4 6 9 10
levels to be combined, dB
Add to the higher level to obtain 3 2.5 2 1.5 1 0.5 0
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
1,5 meters above the floor, using a standard pressure reference of 0,00002 newton per square meter.
- 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.
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 @
PLC in
required impeller
dB
diameter
74 to 62 or 126 to 136 +1
61 to 50 or 137 to 150 +2
49 to 38 +3
37 to 25 +4

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1.10 CE Declaration

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on their respective nameplates.

2.0 TRANSPORT AND STORAGE
In some cases the pumps are not
2.1 Consignment receipt and unpacking complete assembled (refer to section 4, Installation).
Immediately after receipt of the equipment it must be If Can and supporting flange are delivered
checked against the delivery and shipping documents separately, lifting shall be performed as follows:
for its completeness and that there has been no
damage in transportation.
Suction barrel [1100.1] (also referred as ‘Can’) is
Any shortage and or damage must be reported
supplied together with supporting flange [6110] and
immediately to Flowserve and received in writing has to be installed into the sump first. Suction barrel
within one month of receipt of the equipment. Later and supporting flange are delivered assembled
claims cannot be accepted. together. 4 distance sleeves are installed to fix both
Check any crates, boxes and wrappings for any
parts together.
accessories or spare parts which may be packed
Install 4 lifting screws (also referred as ‘Eye Bolts’) on
separately with the equipment or attached to side
the supporting flange and attach slings and straps to
walls of the box or equipment. bring the suction barrel to a vertical position. Move
Each product has a unique serial number. Check that the barrel for installation. Provide hand support to
this number corresponds with that advised and prevent the suction barrel from swaying during
always quote this number in correspondence as well
movement.
as when ordering spare parts or further accessories.

2.2 Handling Distance sleeves are only used for fixing the
base plate during transportation.
Boxes, crates, pallets or cartons may be unloaded
using fork lift vehicles or slings dependent on their
size and construction.

2.3 Lifting

To avoid distortion, the pump unit should be

lifted as shown.
For lifting the driver refer to the
dimension drawing of driver.

2 holes Ø 45mm (1.77 in.) for

lifting the pump without can
and driver

4 pieces lifting screw

according DIN 580 only for
CAN lifting

Depending on the pump

size the pump unit is
packed separately from the
Can, or is put partially into
the Can.

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

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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. If a vertical pump will be stored in horizontal
position, be sure to support the pump sufficiently to
avoid any deformation or bending of the pump.
To avoid the presence of dust and humidity on the
driver, it shall also be wrapped in the same way.

2.4.1 Long period storage

If the pump is delivered in a plastic bag, the
preservations stand 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.

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 WUC covers the highly engineered
specialty end of the Flowserve family of double
2.3.1 Lifting for preparation of insulation casing vertical turbine pumps. The pump line is
If the application is configured for cold applications based on a modular system, thus providing maximum
greater than -20°C, an insulation shall be provided on design and operating flexibility. This is combined with
the suction can. specific design features, including stiff shaft
The installation has to be performed in vertical lifted construction, a self-contained axial thrust bearing
position to ensure that no damage can occur during housing and pressure containing parts certified to
transportation. various international standards. Altogether, this
For detailed information refer to job related general makes the WUC the pump of choice for the most
arrangement drawing, page 2 (G215xxxMZ-00-A1). critical applications where space considerations or
marginal NPSHA values preclude the use of a
2.4 Storage horizontal multistage pump.
Liquid is flowing through the suction flange of the
If the pump will not be put immediately into service, it headstock and through the Can to the impellers. The
should be stored in a dry room. To avoid any damage last stage impeller is discharging the liquid via the
during the storage period, the influence of any low or column pipes, to the discharge flange. The thrust is
high frequency vibration must be totally inhibited. If balanced by back wearing rings and balancing holes.
the pump is delivered sealed in a plastic-wrapper, it is

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

The headstock is equipped with a drain connection, are designed with 7 to 11 vanes to minimize the
which allows to flush the Can with Nitrogen before radial forces at part load operation. All impellers are
disassembly. slipped on the shaft and axially fixed by the impeller
A vent connection for the suction is standard. nut. The shaft is supported in the suction casing, in
every diffuser and in the discharge casing.
The sense of rotation of the pump is counter Optional the hydraulics can be fitted with an inducer
clockwise (CCW), looking from the coupling to the for low NPSH requirement.
shaft end of the pump.
3.3.4.2 Mixed flow hydraulics
3.2 Nomenclature The hydraulics consists of flanged bowls and a
suction casing. The impellers are hydraulically
Example: balanced by back wear rings and balancing holes.
The diffusers are designed with 7 to 11 vanes to
200WUC-2M-5+I minimize the radial forces at part load operation. All
impellers are slipped on the shaft and axially fixed by
200 Flow at BEP the impeller nut. The shaft is supported in the suction
casing and in each bowl.
WUC Pump type - Can Optional the hydraulics can be fitted with an inducer
WUJ = without Can for low NPSH requirement.
2 indicates speed 2–poles
3.3.4.3 10WUC-2H
4 = 4-poles
The hydraulic consists of bowls, which are pushed
M indicates hydraulic Medium Head together and hold by strong tie bolts. The impellers
L = Low Head are secured to the shaft by split rings. Due to the
H = High Head small size, the impellers are only equipped with front
R = Radial Flow wear rings and therefore unbalanced.
5 Number of stages
Optional the hydraulics can be fitted with an inducer
I indicates Inducer as option for low NPSH requirement.
D Dummy stage as option
DS double suction 3.3.4.4 20WUC-2L, 45WUC-2L, 80WUC-2L
P high pressure The hydraulics consists of flanged bowls and a
suction casing. The impellers are secured to the shaft
3.3 Design of major parts by split rings. Due to the small size, the impellers are
only equipped with front wear rings and therefore
unbalanced.
3.3.1 Motor stool
The motor stool supports the thrust bearing. On top Optional the hydraulics can be fitted with an inducer
the driver is mounted. for low NPSH requirement.

3.3.2 Headstock 3.4 Performance and operating limits

Headstock has inline suction and discharge nozzle,
including all the necessary vent and drain
connections. It is a major part of the pump unit, which In the interest of operator safety
supports the column pipes with the hydraulics as well the unit must not be operated above the nameplate
as the motor stool and driver. conditions. Such operation could result in unit failure
causing injury to operating personnel. Consult
3.3.3 Can instruction book for correct operation and
maintenance of the pump and its supporting
The Can is subjected to suction pressure and guides
components.
the fluid to the first stage impeller.

3.3.4 Hydraulics 4.0 INSTALLATION

3.3.4.1 Radial flow hydraulics

Equipment operated in hazardous locations
This are ring section type hydraulics. Suction, stage must comply with the relevant explosion protection
and discharge casing are hold together by strong tie regulations, see section 1.6.4, Products used in
bolts, which allows a very compact and short design. potentially explosive atmospheres.
The radial impellers are hydraulically balanced by
back wear rings and balancing holes. The diffusers

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4.1 Location putting the Can in the foundation the proper

alignment can be obtained by adjusting it with shims
The pump should be located to allow room for
under the flange. Now insert the foundation bolts and
access, ventilation, maintenance and inspection with
grout the space between the basic foundation and
ample headroom for lifting and should be as close as
the Can with grouting cement (refer to illustration)
practicable to the supply of liquid to be pumped.
It is very helpful to use a properly made and stable
wooden frame around the Can. So the grouting cement
Refer to the general arrangement drawing for the
will not flow a side. When the grouting is totally set and
pump set.
hardened the foundation bolts shall be tightened in a
firm and symmetrical way.
4.2 Part Assemblies
With exception of the Can the pumps are delivered
completely mounted and adjusted; also the shaft seal is
in the correct position. So no further axial alignment of
the rotor is necessary. If drivers and/or seal systems
are delivered separately, follow the assembly
procedure in section 6.9.

Axial alignment and rotor setting axial

adjustment need to be distinguished. For correct axial
adjustment of the rotor refer to 5.3.1 Adjusting of the
rotor.

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. The
flange of the Can must be supported on the whole
surface. It should be at least 20 – 30 mm
(0.8 – 1.2 in) higher than the surrounding to avoid the
deposit of dust and humidity.

4.3.1 Vertical alignment

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

The max. vertical misalignment is 0.5 mm/m

pump length.

4.3.2 Steel foundation 4.3.4 Final assembly for not complete assembled
pumps
When the pump unit is mounted directly on structural
steel frame, it shall be well supported by constructural Pumps exceeding a total length of approximately 6 m
beams. It is recommended to check the natural (19.7 ft) are delivered in various components and
frequency of the steel frame, because it shall not must be assembled on site. The main parts are:
coincide with the pump speed. The flange of the Can hydraulic bowls section - various line shafts and
has to be fixed on a flat surface with studs or hex column pipes - headstock and thrust bearing.
screws, the exact horizontal alignment is very To install the pump in the Can, clamps for the column
important! pipes are delivered with the pump.

4.3.3 Concrete foundation 1) Mount the first rising main column pipe [1350.3]
and line shaft to the already assembled hydraulic
A concrete foundation must have an exact horizontal section.
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 1350.3

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

second clamp

2) Mount a clamp to the column pipe. The clamp

has lifting lugs, which allow to use a crane for
lowering this assembly into the pit (see picture). 1350.2

clamp

3) Connect the next line shaft (refer to section 6,

Maintenance) and put on the next rising main
column pipes [1350.2] (see picture) by using a
second clamp.
4) Now the assembly consists of the hydraulic
section and two column sections. This assembly
is taken by a crane using the second clamp.
5) Take off the first clamp and lowering down the
assembly until the clamp is supported by the Repeat step 1 to 5 until the pump is completely
wooden frame (see picture). assembled.

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

6591

Correct sequence of column pipe:

Refer to the corresponding assembling drawing
where the different lengths of column pipes and the
position of the various column pipes are indicated.
The rising main column pipe (above the bowls
assembly) [1350.3] has a special flange dimension
on the lower end for fitting on the bowls assembly. All
following rising main column pipes [1350.2] are of
equal design on top and lower end so that these
pipes can be used either way. The last one or rising
main column pipe [1350.1] are of different length to
reach the required total pump setting. The same
special attention must be given to the various
intermediate shafts [2120.1] which are all equal
between bowl section and rising main column pipe
length [1350.2]. Like the rising main column pipes

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

[1350.1] also the intermediate shafts [2120.2] are

different from the intermediate shafts [2120.1].
a)
With the rising main column pipe [1350.1] the top
shaft [2130.1] is assembled. Now you can put on the
headstock [1141] and hexagon head bolt [6577.4] it
to the top column pipe.

Tight the flange bolts crosswise by using a torque b)

wrench. (For torques refer to section 6, Maintenance)

4.4 Initial alignment a) Parallel Offset: The median lines run parallel. The
The adjustment of motor and pump must be checked maximum allowable parallel offset depends on
(if necessary, make a new adjustment) before first the size of coupling and is indicated in the
start up of the unit. instruction manual of manufacturer of coupling
The motor flange is equipped with adjustment-screws b) Axially Offset: Another offset is the displacement
on the motorstand. (Values for adjustment are of one or both of the shafts. A typical example is
specified in the coupling instruction manual). thermal expansion.

The DBSE (distance between shaft ends)

is shown on the General Arrangement Drawing and is
larger than the length of the coupling spacer. This is
necessary to compensate all manufacturing
tolerances of line shafts and column pipes and to
allow correct axial adjustment of the rotor (refer to
5.3.1 Adjusting of the rotor).
For installation of the coupling spacer the coupling
hub on the pump shaft must be axially moved to
Ensure pump and driver are isolated electrically and match the spacer. This results in an axial clearance
the half couplings are disconnected. "x" between coupling hub and shaft end, which is
Align the motor to the pump, not the pump to the taken into account by the coupling selection.
motor. Alignment of the motor is achieved by using
the adjustment screws.

If the pump is equipped with a

hydrodynamic thrust bearing, pump shaft shall be
centered in the thrust pot prior to driver alignment
(refer to “Pump alignment for hydrodynamic thrust
bearings”). Pump shaft has to remain in the centered
position until the pump and driver shafts alignment is
completed. How the alignment of the coupling should be done
you can see on the sketches and explanations below!
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 a) b)

and readjust alignment before start of the unit.
Take out the spacer of the coupling and check the a) Fix the dial gauge on the driven shaft and check
alignment of shafts end of pump and driver. The the concentricity by turning of both hubs; correct it
maximum parallel offset should not exceed 0.05 mm if necessary.
(0.002 in.) and the axially offset can be ± 2.5 mm b) Fix the dial gauge on the driving shaft and check
(0.10 in.). The coupling spacer gap length shall be ± the concentricity by turning of both hubs; correct it
0.25 mm (0.01 in.). if necessary.
If the pump is handling hot liquid, the alignment must
 For more details refer to the manufacturer’s be rechecked in warm condition of the unit.
instruction manual of coupling.
4.5 Piping

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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 valve 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
backpressure 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 strainer of 40
meshes.
Piping for corrosive liquids shall be arranged to allow
pump flushing before removal of a unit. The minimum required straight pipe length (L2)
before pump suction inlet is specified in Table 01.
4.5.2 Inlet Piping Requirements * The straight pipe section is to be the same diameter
Inlet flow disturbances, such as swirl, unbalance in as that of the pump section nozzle.
the distribution of velocities and pressures, and The pipe length L2 depends on the distance between
sudden variations in velocity can be harmful to the suction nozzle and hydraulic inlet L1 and on the Can
hydraulic performance of a pump, its mechanical inner diameter øD1
behavior, and its reliability.
Table 01
L2 *
L1 in number of pipe diameters
(øD2)
≤ 4 x øD1 5
> 4 x øD1 2

* excerpt from ANSI/HI 9.8 - 1998

4.5.3 Vent
The extent of venting requirements depends on the
application and installation requirements.The
following instructions may be used as a guide insofar
as they apply to the pump as delivered. For type,
position and dimensions of the vent connections
please see GA drawing.

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

design
Do not mix up connections. After N1 Suction nozzle
laying the pipes (and also after repairs), check the N2 Discharge nozzle
pipe runs.
N3 Connection for venting of can
4.5.3.1 General recommendation N5 Connection for venting of M.S
Vent valves are generally installed at one or more
high points of the pump casing waterways. They are M.S Mechanical seal
used to facilitate priming of the pump and to prevent F Flushing API Plan 13
trapping of air or vapor in the casing during operation.
Pumps handling flammable, toxic, or corrosive fluids
require vent piping connected in such a way that the
safety of operating personnel and the installation is
ensured (i.e. to the suction tank). The suction vents
of pumps taking liquids from a closed vessel must be
piped to the gas phase of the suction tank.

Venting lines shall continuously rise up in order to

avoid air/gas entrapment.

A vent connection for the suction can and a vent

connection for API Plan 13 are Flowserve standard
supply in order to allow venting of both, the suction
and discharge areas of the pump. For pumps
supplied with gas coffer dam only the suction CAN
will be fitted with a vent connection.
The vent piping is not within Flowserve scope of
supply.

Fig. 2

4.5.3.3 Gas Coffer Dam design

To prevent icing of the mechanical seal, all WUC
pumps handling liquids at temperatures below -50°C
(60°F) are fitted with a gas coffer dam.
Prior to start-up the pump must be vented through
connection N3 to ensure the pump will be fully filled
with liquid.
Pumps in stand-by (idle) shall be continuously vented
through connection N5 (Fig.3), to avoid build-up of
vapor-bubbles or gas
Fig.1 Venting of the suction and discharge areas of the pump
Standard
Description
4.5.3.2 Standard design design
Prior to start-up the pump must be vented through N1 Suction nozzle
connection N3 to ensure the pump will be fully filled N2 Discharge nozzle
with liquid. Time needed for initial venting as well as
the need for continuous venting during operation N3 Connection for venting of can
depends on the kind of service. Refer to IOM. Connection for balancing line of
N5
gas coffer dam
Pumps in stand-by (idle) shall be continuously vented M.S Mechanical seal
through connection N5 (Fig.2), to avoid build-up of
vapor-bubbles or gas G.C.D Gas Coffer Dam

Standard Description

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

liquids with high gas content

LPG
liquids with density lower than 650 kg/m³

Table 1.

4.5.4.1 Standard Design

The suction and discharge lines shall be completely
filled with liquid prior to start up. The suction line can
be for instance sloped up towards the tank to ensure
that no gas pocket is present in the suction line.

The suction CAN itself must also be vented as shown

in the Figure 4. Vent line shall be always kept open to
allow venting of gas at all times.

Furthermore, the API Plan 13 must be designed with

a venting line to ensure that no gas will be trapped in
the column pipes (discharge side of the pump).

Fig. 3
To ensure positive venting, all vent lines must
be connected to the gas phase of the suction tank.
4.5.4 Recommended venting for flashing liquid
Flashing liquids are medium that vaporize at
atmospheric pressure and ambient temperature.
Gases can be liquefied by pressurization and/or
cooling.

Flashing liquids pose a potential threat for problems

caused by vaporization (flashing). If the pumped
liquid is close to its evaporation point, the whirl¬ing
motion at the entry of the pump hydraulic may cause
evaporation or degassing of the dissolved contents.
These gases would collect in the upper part of the
headstock and disturb the flow.

Therefore proper venting is most critical when

operating pumps handling liquids listed in Table 1

Samples of flashing liquids

boiler feed water
condensate
hot water (above 80 °C (176 °F)
hydrocarbons (CnHn)

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

Fig.4

Shall the vent line of the CAN (N3) be led to the flare instead of the suction tank, a restricted orifice
shall be installed in this line in order to reduce the volumetric losses.

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4.5.4.2 Gas Coffer Dam Design

Venting of the suction side of the pump follows the
same logic as described in paragraph 4.5.3.1.
The gas coffer dam (discharge side) is vented via the
balancing line (N5 of Fig.5). The balancing line shall
be connected to the gas phase of the suction tank.
The line shall be kept open during operation.

Fig.5

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4.5.5 Drain See section 5.4, Direction of

This connection is used for total drainage of the Can. rotation before connecting the motor to the electrical
We recommend the installation of a T-piece with supply.
suitable valves in the vent line. Any neutral gas can
then be brought to the suction side of the pump. 4.7 Final shaft alignment check
Through the pressure built up by the gas, the
remaining liquid will be pressed out of the Can After connecting piping to the pump, rotate the shaft
through the drain connection and can be led back to several times by hand to ensure there is no seizure
the suction tank. Of course the vent line to the and all parts are free.
suction tank must be blocked. If all the liquid is Recheck the coupling alignment, as previously
discharged through the drain line, continue pressing described, to ensure no pipe strain. If pipe strain
in gas for a while to take away all explosive or exists, correct piping.
hazardous gases.
4.8 Protection systems
4.6 Electrical connections
The following protection systems are
recommended particularly if the pump is installed in a
hazardous environment or is handling a hazardous
Electrical connections must be made by a qualified liquid. If in doubt consult Flowserve.
Electrician in accordance with the relevant local
national and international regulations. If there is any possibility of the system allowing the
pump to run against a closed valve or below
It is important to be aware of the EUROPEAN minimum continuous safe flow a protection device
DIRECTIVE on hazardous areas where compliance should be installed to ensure the temperature of the
with IEC60079-14 is an additional requirement for liquid does not rise to an unsafe level.
making electrical connections.
If there are any circumstances in which the system
can allow the pump to run dry, or start up empty, a
power monitor should be fitted to stop the pump or
It is important to be aware of the EUROPEAN prevent it from being started. This is particularly
DIRECTIVE on electromagnetic compatibility when relevant if the pump is handling a flammable liquid.
wiring up and installing equipment on site. Attention
must be paid to ensure that the techniques used If leakage of product from the pump or its associated
during wiring/installation do not increase sealing system can cause a hazard. It is
electromagnetic emissions or decrease the recommended that an appropriate leakage detection
electromagnetic immunity of the equipment, wiring or system is installed.
any connected devices. If in any doubt contact
Flowserve for advice. To prevent excessive surface temperatures at
bearings it is recommended that temperature or
vibration monitoring are carried out.
The motor must be wired up in accordance with the
motor manufacturer's instructions (normally supplied 5.0 COMMISSIONING START-UP,
within the terminal box) including any temperature,
earth leakage, current and other protective devices
OPERATION AND SHUTDOWN
as appropriate. The identification nameplate should
be checked to ensure the power supply is These operations must be
appropriate. carried out by fully qualified personnel.

A device to provide emergency stopping must 5.1 Precommissioning procedure

be fitted. a) The bearing housing must be filled with the
indicated oil. Check also the oil level.
If not supplied pre-wired to the pump unit the b) The pump must be completely filled with liquid to
controller/starter electrical details will also be supplied avoid running dry and to guarantee a correct
within the controller/starter. performance of the pump. Open once again all
vent connections to check the complete filling of
For electrical details on pump sets with controllers the pump. The venting procedure can take from 10
see the separate wiring diagram. min. up to 2 hours, depending on the kind of fluid
(except cryogenic service).

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c) During filling the pump shall reach the specified 2000 service hours or at least every 6 month.
temperature, so pumps for hot liquids (T > 100 °C
(212 °F)) shall be warmed up by preflushing with a 5.2.3 Oil level
rate of 50 °C (78 °F) per hour. Unless otherwise The correct oil level is in the middle of the oil sight glass
specified the external temperature of the pump and shall be checked when pump is not in operation.
must be within 30 °C (54 °F) of the temperature Periodically check if the lubricating oil is mixed with any
of the liquid to be pumped at that time.Cryogenic condensed water. Careful opening of the oil drain
pumps must be cooled down. The lower part of the during a stop of the pump will show any water.
seal gland, the gascofferdam and the headstock
must be completely coated with ice. The ice has
good isolating properties and limits the heat input During operation the level will decrease
from the ambient. due to circulation of the oil through the bearings.
d) Check the sense of rotation of the pump (Coupling
spacer dismantled). A too high oil level will result in higher bearing
Sense of rotation is counter clockwise viewed to temperatures and therefore poorer lubrication.
the drive end of the pump.
e) The pump rotor and the shaft seal must be in 5.2.4 Oil quality
correct axial position. Mounting plates of Oil used for lubrication should only be of high quality.
mechanical seal must be locked at the seal gland The viscosity of the oil at working temperature must
in open position. Drive-collar of the mechanical be at least 10 cSt. The pouring point of the oil must
seal sleeve must be tightened. be in accordance with the lowest expected
f) Check the readiness of all auxiliary systems (seal temperature of the bearing housing during a stop of
sys., lubrication sys.,...) for start up. the pump. For recommended lubricating oils refer to
g) All pipe work, including the internal and the the lubrication table.
auxiliary pipe work, must be connected correctly Having selected the corresponding oil quality the
and must be absolutely tight. Check the tightness actual oil temperature at the bearing housing must be
of all connections of the auxiliary pipe work. The checked after two service hours of the pump.
suction valve must be open, the discharge valve Considering this measured oil temperature the actual
shall be closed. viscosity must be determined by using the data sheet
h) Turn the pump by hand, if required with the help of of the oil, to verify the minimum required viscosity of
a lever, to check the free rotation of the rotor. The 10 cSt. Do not forget, the oil temperature in the
rotor must turn uniformly and noiselessly. Some bearing itself is about 10 °C (Δ 18 °F) higher than the
resistance may be felt due to friction in bearings oil temperature at the bearing housing. On the
and seals. following table the oil viscosity is given at 40 °C (104
i) Check the readiness of the driver for start up. Refer °F). Determining the correct lubricating oil one must
to the manual of the driver (preheating for take into consideration that all bearings will have
explosion proof E-motor). higher temperatures during the first 20 service hours.
In constant operation the bearing temperature will
5.2 Pump Lubricants decrease about 10 °C (50 °F). The oil temperature
shall be lower than 85 °C (185 °F) after this running-
5.2.1 Lubrication in time. The bearing outer race temperature should
not exceed 95°C (203°F). If the temperature is
The bearing housing shall be filled with proper
higher, the reason may be a wrong oil quality, wrong
lubricating oil prior to start up. If the pump will be
oil level or overload of the pump because of
started after a longer storage period, the bearing
excessive wear.
housing should be first flushed and cleaned with
If the humidity at the site is high, the roller bearings
gasoline. It is not necessary to remove the
become easily rusty during stand still periods. To
preservation oil as this will mix up thoroughly with the
avoid that, we recommend to mix the lubricating oil
lubrication oil.
with a corrosion inhibitor contact your lubrication oil
Lubrication is provided by the pumping effect of the
supplier for proper additives inhibitors.
rotating ball bearings. Maintaining the correct oil level
(middle of the oil sight glass) ensures that the lower
ball bearing is covered with oil. 5.2.5 Oil quantity
For recommended lubricating oils refer to the Bearing size is shown on the nameplate of the pump,
lubrication table 5.2.6 and with this the correct thrust bearing frame can be
selected according to the following table.
5.2.2 Oil change
After first start up, the oil shall be changed after 200 Thrust bearing No. Oil quantity l (Fl.oz.) Bearing size
service hours. 0N 0.5 (16.9) 7210 BECBJ (M)
Every further oil change shall take place after about 1N 1.5 (50.7) 7313 BECBJ (M)

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

3N 2 (67.6) 7315 BECBJ (M)

4N 2.5 (84.5) 7317 BECBJ (M)
5N 3 (101.4) 7318 BECBJ (M)
6N 5 (169) 7322 BECBM
7N 6.5 (219.8) 7326 BCBM
7232 BCBM
8N 6.5 (219.8)
7330 BCBM

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

5.2.6 Lubrication Table

Pure Oil Mist
Oil Oil Bath and Purge Oil Mist Lubrication
Lubrication
Lubrication service Ball bearing
Mineral Oil Mineral Oil
Type
Centrifugal Pump Lubrication

(Petroleum Based) (Petroleum Based)

Ambient temperature -20 to 35 35 to 60 -5 to 60
°C (°F) (-4 to 95) (95 to 140) (23 to 140)
Oil temperature range* -5 to 65 up to 85 up to 100 15 and above
°C (°F) (23 to 149) (up to 185) (up to 212) (59 and above)
Viscosity
32 46 68 100
mm²/s 40°C [cSt]
First Oil Change 200 hours 200 hours 200 hours 200 hours
2000 hours or at least every 2000 hours or at least every 2000 hours or at least every 2000 hours or at least every
Further Oil Changes
6 months 6 months 6 months 6 months
Designation according to
32 46 68 100
DIN51502 ISO VG
BP Energol HL32 BP Energol HL46 BP Energol HL68
BP -
BP Energol HLP32 BP Energol HLP46 BP Energol HLP68

CASTROL Perfecto T32** Perfecto T46** Perfecto T68 -

OMV OMV turb HTU 32** OMV turb HTU 46** OMV turb HTU 68 -

Aral Aral Vitam GF 32 Aral Vitam GF 46 Aral Vitam GF 68 -

Oil Companies and Lubricants

Esso NUTO H32 NUTO H46 NUTO H68 -

LSC LSO 32 LSO 46 LSO 68 LSO 100

(for oil mist) Synthetic oil Synthetic oil Synthetic oil Synthetic oil

Mobil Nuto H32 Mobil Nuto H46 Mobil Nuto H68

Mobil Mobil DTE13M Mobil DTE15M Mobil DTE16M -
Mobil DTE24 Mobil DTE25 Mobil DTE26

Shell Tellus 32 Shell Tellus 46 Shell Tellus 68

Shell -
Shell Turbo T32** Shell Turbo T46** Shell Turbo T68

Texaco Rando HD 32 Rando HD 46 Rando HD 68 -

Total Azolla ZS32 Azolla ZS46 Azolla ZS68 -

Wintershall Wiolan HN32 Wiolan HN46 Wiolan HN68

-
(BASF Group) Wiolan HS32 Wiolan HS46 Wiolan HS68

* 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) upwards

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

Seal System / Pumped Liquid Quench-Oil General Features

- Raffinated Hydraulic Oil

Barrier/Buffer Fluid for - Synthetic Oil appr. 10-15 cST at 40°C
Tandem Seal to -40 °C (-40 °F)
Mech. Seal - Mixture of water / glykol (104 °F)
Back to back Seal with gascoffer-dam
Conventional back to back Seal
ATTENTION: below -40°C (-40 °F)
Do not use Methanol Pourpoint vaporization
above 80°C (176 °F)
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 51562

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

5.2.7 Hydrodynamic thrust bearing lubrication 5.2.10.1 Adjusting of TRICO Constant Level
If the pump is equipped with a hydrodynamic thrust Oiler
bearing refer to bearing manufacturer’s IOM for all If the pump is fitted with a Constant Level Oiler type
data related to the thrust bearing lubrication. „TRICO“, the correct oil level has to be checked after
fitting the pump!
5.2.8 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

5.2.9 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
1 Trico-Oiler 2 Counter nut
refering to section 5.2.3 Oil level. 3 Leveling screw 4 Fixing screw

5.2.10 Oil level a) To check quickly the correct oiler adjustment,

The correct oil level is in the middle of the oil sight glass loosen the thumb screw and remove the
and shall be checked when pump is not in operation. reservoir. Turn the adjusting nut until you reach
Periodically check if the lubricating oil is mixed with any 0.35 to 0.43 in. (9 to 11mm) distance from the top
condensed water. Careful opening of the oil drain of the adjusting nut to the centerline of the side
during a stop of the pump will show any water. port.
b) Additionally you can check the correct oiler
During operation the level will decrease adjustment by an oil sight glass (minimum oil
due to circulation of the oil through the bearings. level is the middle of the oil sight glass).
c) After a correct oiler adjustment, reinstall the
reservoir and the oiler body and tighten the thumb
A too high oil level will result in higher bearing screw.
temperatures and therefore poorer lubrication.

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5.2.13 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.

During operation the level will decrease

due to circulation of the oil through the bearings.

A too high oil level will result in higher bearing

temperatures and therefore poorer lubrication.

5.2.13.1 Adjusting of WATCHDOG Constant

Level Oiler
This design of Watchdog Oiler prevents the flooding
of the bearing by means of the positive setting in the
5.2.11 Lubrication Oiler, thus maintaining the correct oil level at all
The bearing housing shall be filled with proper times. When these Oilers are used on Ball or Roller
lubricating oil prior to start up. If the pump will be bearings, the installation is the same as described
started after a longer storage period, the bearing below, excepting that the oil level in the bearing
housing should be first flushed and cleaned with should never cover more than maximum above inside
gasoline. It is not necessary to remove the diameter of the outer race at its lowest point.
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

5.2.12 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. If the pump is fitted with a Constant Level
c) Close the oil drain and fill in Oil through the oiler until Oiler type "WATCHDOG", no adjustment of the oil
the oil level reaches the bottom of the sight glass. level is possible.
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.

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5.2.14 Pure oil mist Lubrication

Pure oil mist system utilize a continuous oil mist flow
through the bearing housing to deliver clean oil The pressure in the bearing housing shall be 0,05
directly to the bearings and to maintain an outward bar (0,74 psi) (20 inches of water column). A
flow of air from the housing to prevent the ingress of continuous lubrication should be occur during
moisture and other corrosive contaminants. If the operation and standby.
pump will be started after a longer storage period, the Pre Lubrication shall be performed at least 1h
bearing housing should be first flushed and cleaned before first start up.
with gasoline. It is not necessary to remove the
preservation oil.
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.

5.2.15 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 5.2.6.

The supplied air must be dry and clean. The

cleanness must be < 5µm.

The bearing housing requires a minimum SCFM

value as follows:

Bearing Reclassifier at
Frame Manifold

0N 1 x 0.18 SCFM

1N 1 x 0.30 SCFM

3N 2 x 0.30 SCFM

4N 2 x 0.30 SCFM

5N 2 x 0.30 SCFM

6N 2 x 0.30 SCFM

7N 2 x 0.45 SCFM

8N 2 x 0.30 SCFM

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

5.2.16 Lubrication
The bearing housing shall be filled with proper The pressure in the bearing housing shall be 0,05
lubricating oil prior to start up. If the pump will be bar (0,74 psi) (20 inches of water column). A
started after a longer storage period, the bearing continuous oil mist lubrication should be occur
housing should be first flushed and cleaned with during operation and stand by.
gasoline. It is not necessary to remove the
preservation oil as this will mix up thoroughly with the
lubrication oil. After start up the bearing temperature
Lubrication is provided by the pumping effect of the must be observed carefully. The temperature at the
rotating ball bearings. Maintaining the correct oil level bearing housing should not exceed 85°C.
(middle of the oil sight glass) ensures that the lower
ball bearing is covered with oil.
For recommended lubricating oils refer to the Refer to the GA-drawing regarding the
lubrication table 5.2.7. connections to the supply systems.

5.2.17 Purge oil mist Lubrication 5.2.18 Oil change

Purge oil mist system utilize a continuous oil mist flow After first start up, the oil shall be changed after 200
through the bearing housing to deliver clean oil service hours.
directly to the bearing housing to maintain an outward Every further oil change shall take place after about
flow of air from the housing to prevent the ingress of 2000 service hours or at least every 6 month.
moisture and other corrosive contaminants. 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.

5.2.19 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.

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.
The supplied air must be dry and clean. The
cleanness must be < 5µm. 5.3 Impeller clearance
Correct axial rotor setting is essential for trouble free
For Purge Oil Mist Lubrication, a Reclassifier with a operation of the pump.
Value of 0.09 SCFM should be used at the Manifold.
The bearing housing is equipped with a constant 5.3.1 Adjusting of the rotor
level oiler with included overflow device. The
a) Remove coupling spacer, coupling hub on pump
Overflow connection (3/8” tube) shall be connected to
shaft and fan [8161] (when delivered).
a collection container.
Check overflow setting as per Oiler IOM.
Use an anaerobic adhesive for
securing the socket set screw for reassembly.
b) Fix the position of the mechanical seal by putting
the assembly jigs, mounted on the seal end plate,
into the groove in the shaft sleeve.

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c) Open screws from the clamping unit, located on 5.3.2 Adjusting of the rotor for pump type
the end of the shaft sleeve (refer to shaft seal 10 WUC-2H, 20, 45 & 80 WUC – 2L
drawing).
d) Loose and remove socket head cap screws a) Remove coupling spacer, coupling hub on pump
[6579.1] from the shaft nut [2910]. shaft and fan [8161] (when delivered).
e) Turn shaft nut upside till the rotor moves in the
lowest position and cannot turned by hand.
f) Measure the dimension from the shaft nut to the Use an anaerobic adhesive for
end of the shaft. securing the socket set screw for reassembly.
g) Now lift the rotor by turning the shaft nut in the b) Fix the position of the mechanical seal by putting
other direction till it is in the highest position. the assembly jigs, mounted on the seal end plate,
into the groove in the shaft sleeve.
c) Open screws from the clamping unit, located on
For heavy pumps the end of the shaft sleeve (refer to shaft seal
(rotor weight > 150 kg (331 lb.)) we recommend drawing).
the following practice. The rotor is already in its d) Loose and remove socket head cap screws
lowest position. Screw in an Eyebolt into the [6579.1] from the shaft nut [2910].
thread at the top of the shaft. Use a lever or a e) Turn shaft nut upside till the rotor moves in the
crane to lift the shaft (do it slowly, the axial lowest position and cannot turned by hand.
clearance is only a few millimeters). f) Now lift the rotor by turning the shaft nut in the
h) Measure again the dimension from the shaft nut other direction till it is in the highest position.
to the end of the shaft.
i) Take the mean value of the two dimensions and
adjust the rotor to this value by turning the shaft For heavy pumps
nut. (rotor weight > 150 kg (331 lb.)) we recommend
j) Fix the shaft nut with the socket head cap the following practice. The rotor is already in its
screws. lowest position. Screw in an Eyebolt into the
k) Fix the shaft sleeve with the clamping unit and thread at the top of the shaft. Use a lever or a
turn the assembling jigs out of the groove from crane to lift the shaft (do it slowly, the axial
the shaft sleeve and fix them on the seal end clearance is only a few millimeters).
plate. g) Turn the shaft nut 180° in opposite direction to
l) Check if the shaft can be turned easy by hand slip down the shaft 1mm (0.04 in) from its highest
m) Mount fan (when delivered) coupling hub and position.
spacer again. h) Fix the shaft nut with the socket head cap
screws.
i) Fix the shaft sleeve with the clamping unit and
If the pump is fitted with a rigid turn the assembling jigs out of the groove from
spacer type coupling ensure that the coupling is the shaft sleeve and fix them on the seal end
completely assembled and all screws are fixed. plate.
j) Check if the shaft can be turned easy by hand
k) Mount fan (when delivered) coupling hub and
For pumps with a setting length spacer again.
above 5 m (16.4 ft) (distance between centerline
discharge and pump suction) all the tolerances of the 5.4 Direction of rotation
line shafts must be considered.
Therefore put rotor to its lowest position. Then lift
rotor to its highest position. Now lower the rotor 3 mm The sense of rotation of the
(0.12 in.) to its final axial position. pump is counter clockwise (CCW); looking from the
3 mm (0.12 in.) axial setting applies also for rigid coupling to the shaft end of the pump.
spacer type couplings.
The rotation of the driver shall be checked.
If the pump is delivered disassembled or
if the fluid temperature is below -100°C (-148°F) or 5.5 Guarding
above 150 °C (302°F), adjusting of the rotor is Be sure that the coupling guards are mounted
necessary prior to the first start up. Rotor adjusting is correctly at the thrust motor stool prior to start up.
necessary after each pump maintenance.
5.6 Priming and auxiliary supplies
The pump must be completely primed prior to start up
by using the vent connections as shown in the
general arrangement drawing.

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

The venting procedure depends on the kind of fluid. procedure is as follows:

To verify if the pump is filled with liquid check: 1) Open suction vent valve and discharge bypass
valve.
a) For non hazardous liquids close the vent valve 2) Slightly open suction valve to allow a small flow
after 5 minutes and reopen it slowly to proof if of liquid into the pump. The liquid will vaporize,
liquid escapes. travel through the pump, then through the suction
b) For hazardous liquids (Chemicals, non flashing and discharge vent lines to the vapor phase of
hydrocarbons) vent lines are usually piped back the storage vessel.
to the suction tank or to the flare. Keep vent lines 3) See that the rotating element turns freely by hand
open at least for 10 minutes and check suction by rotating the coupling. If the coupling has been
pressure und suction temperature against the spinning at a speed greater than approximately
specification. 500 rpm, restrain it until Step 5, then remove the
c) For flashing hydrocarbons vent lines are usually restraint.
piped back to the suction tank or to the flare. 4) Check cool down rate occasionally by opening
Keep vent linesopen at least for 30 minutes the drain valve and discharge bleed valve. Gas
before starting the pump and check suction temperature and eventual liquid presence will be
pressure und suction temperature against the noted at these points. If desired, these valves
specification. For flashing hydrocarbons, the vent may be left partially open during the entire cool
line shall remain continuously open during down process. Adjust suction valve to control
operation in order to prevent build up of vapour cooling rate.
bubble or gas in the inlet area of the pump. 5) When liquid is observed at the suction vent valve,
Otherwise we recommend to start the pump with gradually adjust the suction valve to fully open
vent lines slightly open. position. If the coupling was restrained from
If a constant bypass line with a 3 mm (0.12 in.) rotation in Step 3, remove the restraints.
orifice is installed, it must be open at any time. 6) When liquid appears at the discharge bleed
d) For cryogenic service (pumped fluid temperature valve, close this valve and allow pump to cool
below 0 °C (32 °F)) refer to section 5.7 Cool about 10 minutes longer. Re-open the discharge
down procedure for cryogenic service. bleed valve and close it when gas-free liquid
e) Auxiliary systems, e.g. barrier /buffer fluid appears.
systems, cooling circuits, shall be filled according 7) The cool down procedure is now completed and
to the user instructions. the pump may be operated or put into cold
standby condition.
5.7 Cool down procedure for cryogenic
5.7.1 Cold standby condition
service
The pump is maintained in cold standby with only
The following cool down procedure is based on field
suction valve, suction vent valve and discharge bleed
experience with similar pumps. The procedure should
valve open.
be used as a guide and adjusted as necessary to suit
each installation.
Three things must be accomplished: Headstock must be fully covered
1) Prior to cool down the pump must be purged with ice up to the mechanical seal.
(derimed) with dry gas to remove all moisture Check suction temperature and suction pressure to
which might freeze and lock the pump. The pump verify cool down status.
shaft should be checked to see that it rotates If a gas coffer dam is installed, the balancing line shall
freely by hand during all phases of cooling down be led back to the suction vessel. The line must be
and filling. open during operation to avoid damage of the
2) The pump must be cooled slowly to prevent equipment. The maximum back pressure created in
unnecessary thermal shock. A cooling rate of the balance line, shall not exceed 2 bar (29 psi)
30 °C (54 °F) per hour is recommended. above suction pressure. Therefore the balance line
3) Final temperature of liquid in the pump must be shall be designed for a pressure loss of max. 1 bar
low enough to prevent flushing (gasifying) when (14.5 psi). The following table gives the expected
the pump is started. When a pump is first filled, balance flow rates:
the liquid temperature may be a few degrees
above final temperature because pump parts are Thrust
Bearing size Balance flow rate
still warm contributing heat to the liquid. This is bearing No.
evidenced by viewing only gas being vented out 0N 7210 BECBJ (M) 3 m³/h (13.2 gpm)
to the atmosphere and little, if any liquid.
1N 7313 BECBJ (M) 6 m³/h (26.4 gpm)
Additional cooling time is then required to reach a
suitable starting temperature. 3N 7315 BECBJ (M) 8 m³/h (35.2 gpm)
4N 7317 BECBJ (M) 9.5 m³/h (41.8 gpm)
Assuming all valves are closed, the cool down

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

5N 7318 BECBJ (M) 10 m³/h (44 gpm) d) Check the mechanical seal against any leakage.
6N 7322 BECBM 11 m³/h (48.4 gpm)
Right after start up a minor leakage
7N 7326 BCBM 12 m³/h (52.8 gpm)
of the mechanical seal is quite normal. Normally
8N 7232 / 7330 BCBM 12 m³/h (52.8 gpm) this leakage disappears after few minutes of
operation.
These flow rates shall be used for the piping design.
5.9 Operation
If the pump is equipped with a) Verify that the pump is operating within the
hydrodynamic thrust bearing expected balance flow specified limits, min/max flow, pressure,
rate is 12m³/h (52.8 gpm). temperature, vibration, power
b) The bearing housing temperature shall not exceed
Design and manufacturing of the balance 80 °C (176 °F). If higher bearing temperature are
line is not within the responsibility of FPD. observed, check the viscosity grade of the used
lubrication oil.
5.8 Starting the pump
a) Start the driver according to the specification. If the pump is equipped with
(Refer to driver IOM) hydrodynamic thrust bearing refer to bearing
manufacturer´s IOM and to recommendation for
maximum bearing temperature.
Pumps are usually started against
closed discharge valve
b) Check the discharge and suction pressure gauge The minimum viscosity is
to verify the pumps delivered head. Open the 10 cSt at the expected oil temperature.
discharge valve slowly, until the pump reaches the (Oil temperature = bearing gland temperature
specified operation point. The pump must operate + 10 °C (50 °F))
smoothly, and the vibration must be below 5 mm/s c) From time to time check the pump shaft seal.
(0.2 in./sec) (API 610 vibration limits). Leakage of 5ml/hour is also with a mechanical
shaft seal unavoidable.
d) Check the correct venting of the Can and the
The discharge valve must be opened headstock by opening the valve in the vent line for
within 30 sec. after start up. Longer operation short time. When the condition of service is near
against closed discharge valve will damage the the boiling point, a permanent vent line with a 3
pump. If a minimum flow valve is installed, take mm ( 0.12 in.) orifice (to inhibit the exit of too much
pressure gauge readings to verify the correct liquid) must be installed back to the suction tank.
operation. This will ensure that any suction and NPSH
problems can be avoided during normal service.
If the backpressure of the discharge e) Observe the power consumption of the pump to
pipe is sufficient, pumps can be started against detect excessive wear.
open valve.
5.10 Stopping and Shutdown
Ensure that your driver is capable deliver a) Close the outlet valve, but ensure that the pump
the higher torque required by starting against runs in this condition for no more than a few
open valve. seconds.
b) Stop the pump.
To prevent the pump from reverse rotation c) Switch off flushing and/or cooling/ heating liquid
after shut down, the installation of a check valve supplies at a time appropriate to the process.
is recommended. d) For prolonged shutdowns and especially when
Although the pump is not affected by reverse ambient temperatures are likely to drop below
rotation because of special coupling design , it can freezing point, the pump and any cooling and
be an issue with the driver. flushing arrangements must be drained or
Check the discharge and suction pressure gauge otherwise protected.
to verify the pumps delivered head.
The pump must operate smoothly, and the For automatic start/stop operation of the
vibration must be below 5 mm/s (0.2 in./sec) (API pump, ensure that all steps described in chapter 5.6,
610 vibration limits). 5.7, 5.8 and 5.9 are implemented in the control logic.
If a minimum flow valve is installed, take pressure
gauge readings to verify the correct operation. 5.11 Hydraulic, mechanical and electrical
c) Check the pipe system against any leakage. duty

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

This product has been supplied to meet the 6.0 MAINTENANCE

performance specifications of your purchase order,
however it is understood that during the life of the
product these may change. The following notes will 6.1 General
help the user to decide how to evaluate the
implications of any change. If in doubt contact your It is the plant operator's responsibility to
nearest Flowserve office. ensure that all maintenance, inspection and
assembly work is carried out by authorized and
5.11.1 Specific gravity (SG) qualified personnel who have adequately familiarized
Pump capacity and total head in meters (feet) do not themselves with the subject matter by studying this
change with SG, however pressure displayed on a manual in detail.
pressure gauge is directly proportional to SG. Power (See also section 1.6.2.)
absorbed is also directly proportional to SG.
It is therefore important to check that any change in Any work on the machine must be performed when it
SG will not overload the pump driver or over- is at a standstill. It is imperative that the procedure
pressurize the pump. for shutting down the machine is followed, as
described in section 5.10.
5.11.2 Viscosity
For a given flow rate the total head reduces with On completion of work all guards and safety devices
increased viscosity and increases with reduced must be re-installed and made operative again.
viscosity. Also for a given flow rate the power
absorbed increases with increased viscosity, and Before restarting the machine, the relevant
reduces with reduced viscosity. It is important that instructions listed in section 5, Commissioning, start
checks are made with your nearest Flowserve office if up, operation and shut down must be observed.
changes in viscosity are planned.
Oil and grease leaks may make the ground
5.11.3 Pump speed slippery. Machine maintenance must always
begin and finish by cleaning the ground and the
Changing pump speed effects flow, total head, power
exterior of the machine.
absorbed, NPSHR, noise and vibration. Flow varies
in direct proportion to pump speed. Head varies as
If platforms, stairs and guard rails are required for
speed ratio squared. Power varies as speed ratio
maintenance, they must be placed for easy access to
cubed. If increasing speed it is important therefore to
areas where maintenance and inspection are to be
ensure the maximum pump working pressure is not
carried out. The positioning of these accessories
exceeded, the driver is not overloaded,
must not limit access or hinder the lifting of the part to
NPSHA>NPSHR, and that noise and vibration are
be serviced.
within local requirements and regulations.
When air or compressed inert gas is used in the
5.11.4 Net positive suction head (NPSHA) maintenance process, the operator and anyone in the
NPSH available (NPSHA.) is a measure of the vicinity must be careful and have the appropriate
energy available in the pumped liquid, above its protection.
vapour pressure, at the pump suction branch.
NPSH required (NPSHR.) - is a measure of the Do not spray air or compressed inert gas on skin.
energy required in the pumped liquid, above its
vapour pressure, to prevent the pump from cavitating. Do not direct an air or gas jet towards other people.
It is important that NPSHA >NPSHR. The margin
between NPSHA >NPSHR should be as large as Never use air or compressed inert gas to clean
possible. If any change in NPSHA is proposed, clothes.
ensure these margins are not significantly eroded.
Refer to the pump performance curve to determine Before working on the pump, take measures to
exact requirements particularly if flow has changed. If prevent an uncontrolled start. Put a warning board
in doubt please consult your nearest Flowserve office on the starting device with the words:
for advise and details of the minimum allowable "Machine under repair: do not start".
margin for your application.
With electric drive equipment, lock the main switch
5.11.5 Pumped flow open and withdraw any fuses. Put a warning board
Flow must not fall outside the minimum and on the fuse box or main switch with the words:
maximum continuous safe flow shown on the pump "Machine under repair: do not connect".
performance curve and/or data sheet.

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

Never clean equipment with inflammable solvents or hours since last recharge of grease or complete
carbon tetrachloride. Protect yourself against toxic grease change.
fumes when using cleaning agents. e) Check any auxiliary supplies eg. heating/cooling
(if fitted) are operating correctly.
6.2 Maintenance schedule f) Refer to the manuals of any associated
equipment if routine checks needed.

It is recommended that a maintenance plan 6.2.2 Periodic Inspection (every 6 Month)

and schedule is adopted, in line with these User
Instructions, to include the following:
a) Any auxiliary systems installed must be monitored, a) Check foundation bolts for
if necessary, to ensure they function correctly. security of attachment and corrosion.
b) Gland packings must be adjusted correctly to b) Check pump operation hours to determine if
give visible leakage and concentric alignment of bearing lubricant shall be changed.
the gland follower to prevent excessive c) The coupling should be checked for correct
temperature of the packing or follower. alignment and worn driving elements.
c) Check for any leaks from gaskets and seals. The
correct functioning of the shaft seal must be
checked regularly.
 Refer to the manuals of any associated
equipment for periodic checks needed.
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 6.3 Spare parts
operating range for the pump.
f) Check vibration, noise level and surface 6.3.1 Ordering of spares
temperature at the bearings to confirm When ordering spare parts we need the following
satisfactory operation. information:
g) Check dirt and dust is removed from areas
around close clearances, bearing housings and 1. pump type and pump size
motors. 2. serial number of the pump
h) Check coupling alignment and re-align if 3. number of the required spare parts
necessary. 4. reference number and name of the part as listed
in the part list or in the sectional drawing
Our specialist service personnel can help with Example: for CAN pump:
preventative maintenance records and provide 10 WUC-2H, serial number G202222/01
condition monitoring for temperature and vibration to 1 piece impeller Pos. 2200.1
identify the onset of potential problems.
The serial number of each pump is indicated on the
If any problems are found the following sequence of name plate. If the material should be changed from
actions should take place: the original delivered one, additionally indicate the
a) Refer to section 8, Faults; causes and remedies, exact material specification. If ordered impellers shall
for fault diagnosis. have smaller or larger outer diameter, indicate also
b) Ensure equipment complies with the with your order. Without a special remark the spare
recommendations in this manual. impellers will be delivered with the diameter of the
c) Contact Flowserve if the problem persists. original impellers.

6.2.1 Routine Inspection (daily/weekly) If you need the wear rings oversized or undersized,
please indicate, otherwise the wear rings will be
delivered with standard size.
The following checks should be
made and the appropriate action taken to remedy any
To ensure continuous satisfactory operation,
deviations.
replacement parts to the original design specification
a) Check operating behavior; ensure noise,
should be obtained from Flowserve.
vibration and bearing temperatures are normal.
Any change to the original design specification
b) Check that there are no abnormal fluid or
(modification or use of a non-standard parts) will
lubricant leaks (static and dynamic seals) and
invalidate the pump’s safety certification.
that any sealant systems (if fitted) are full and
operating normally.
c) Check that shaft seal leaks are within acceptable 6.3.2 Storage of spares
limits. Spares should be stored in a clean dry area away from
d) Check the level and condition of lubrication oil. vibration. Inspection and retreatment of metallic
On grease lubricated pumps, check running

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

surfaces (if necessary) with preservative is

recommended at a 6 monthly interval.

6.4 Recommended spares

Spares Recommended
Part Start up Normal Maintenance
No.of identical pumps 1-3 4-6 7+ 1-3 4-6 7-9 10+

Element (if unspared) (1) 1 1 1 1

Rotor 1 1 1 1
Case 1
Head (case cover and stuffing box) 1
Motor stool 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
Bearing pads only (hydrodynamic,thrust) 1 1 1 1 1 1 5
Mechanical seal complete (Cartridge) 1 2 3 1 2 3 3
Shaft sleeve 1 2 3 1 2 3 3
Gaskets, O-rings (set) 1 2 3 1 2 3 3
Bearing bushings and sleeves (set) 1 1 2 1 1 3 3
Stage bushings and sleeves (set) 1 1 2 1 1 3 3
(1) Vital service pumps are generally unspared, partially spared or multistage. When a vital machine is down, production loss or
violation of environmental permits results. Element consist of assembled rotor plus stationary hydraulic parts (diffuser(s) or
volute(s)).

6.5 Tightening torque & tightening sequence

6.5.1 Tightening torque

Tightening Torque MA Nm (lbf.ft)
Carbon Steel
A193 B7M, A193 B7,
Size of A320 L7M A320 L7,
3.6 4.6 10.9
Screw (NACE) 8.8, 1.7225
(1) (1)
[Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft]
M4 4.2 (3.1) 3 (2.2) 0.8 (0.6) 1.1 (0.8) 4.6 (3.4)
M5 8.3 (6.1) 5.9 (4.4) 1.6 (1.2) 2.2 (1.6) 8.6 (6.3)
M6 14.2 (10.5) 10.1 (7.4) 2.8 (2.1) 3.7 (2.7) 14.9 (11)
M8 35 (26) 24.6 (18.1) 6.8 (5) 9.1 (6.7) 36 (27)
M10 68 (50) 48 (35) 13.7 (10.1) 18.3 (13) 71 (52)
M12 118 (87) 84 (62) 23 (17) 31 (23) 123 (91)
M14 187 (138) 133 (98) 37 (27) 50 (37) 195 (144)
M16 290 (214) 206 (152) 57 (42) 76 (56) 302 (223)
M18 335 (247) 295 (218) 80 (59) 106 (78) 421 (311)
M20 472 (348) 415 (306) 112 (83) 150 (111) 592 (437)
M22 644 (475) 567 (418) 151 (111) 202 (149) 807 (595)
M24 811 (598) 714 (527) 193 (142) 257 (190) 1017 (750)

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

M27 1193 (880) 1050 (774) 284 (209) 379 (280) 1496 (1103)
M30 1614 (1190) 1420 (1047) 386 (285) 515 (380) 2033 (1500)
M33 2191 (1616) 1928 (1422) 523 (386) 697 (514) 2747 (2026)
M36 2820 (2080) 2482 (1831) 672 (496) 897 (662) 3535 (2607)
M39 3645 (2689) 3208 (2366) 870 (642) 1160 (856) 4569 (3370)
M42 3920 (2891) 3980 (2936) 1146 (845) 1447 (1067) 5670 (4182)
M45 4875 (3596) 4950 (3651) 1425 (1051) 1800 (1328) 7050 (5200)
M48 5899 (4351) 5990 (4418) 1724 (1272) 2178 (1606) 8530 (6292)
M64 14083 (10388) 14300 (10548) 4117 (3037) 5201 (3836) 20370 (15025)
M68 16998 (12538) 17260 (12731) 4969 (3665) 6277 (4630) 24580 (18130)
M76 25230 (18610) 8270 (6100)

Tightening Torque MA Nm (lbf.ft)

Duplex SS Austenitic SS other alloys

A193 B8/B8M,
Size of S32760, S31803,
A193 B8M Cl2 A4-70, A2-70 A193 B8MA (NACE) N08825
Screw 1.4462
A2-50, A4-50

[Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft] [Nm] [lbf.ft]
M4 2.1 (1.5) 3.2 (2.4) 1.9 (1.4) 0.9 (0.7) 1.1 (0.8)
M5 4.1 (3) 6.4 (4.7) 3.6 (2.7) 1.6 (1.2) 2.2 (1.6)
M6 7.1 (5.2) 10.9 (8) 6.3 (4.6) 2.9 (2.1) 3.7 (2.7)
M8 17 (12.5) 27 (19.9) 15 (11.2) 7.1 (5.2) 9.1 (6.7)
M10 34 (25) 52 (38) 30 (22) 14 (10.3) 18.3 (13)
M12 59 (44) 91 (67) 51 (38) 24 (17.7) 31 (23)
M14 94 (69) 143 (105) 82 (60) 38 (28) 50 (37)
M16 145 (107) 222 (164) 126 (93) 58 (43) 76 (56)
M18 201 (148) 308 (227) 176 (130) 82 (60) 106 (78)
M20 283 (209) 434 (320) 247 (182) 115 (85) 150 (111)
M22 387 (285) 473 (349) 337 (249) 157 (116) 202 (149)
M24 487 (359) 595 (439) 426 (314) 198 (146) 257 (190)
M27 716 (528) 716 (528) 602 (444) 292 (215) 379 (280)
M30 968 (714) 968 (714) 817 (603) 397 (293) 515 (380)
M33 1315 (970) 1008 (744) 1112 (820) 536 (395) 697 (514)
M36 1692 (1248) 1297 (957) 1428 (1053) 690 (509) 897 (662)
M39 2187 (1613) 1849 (1364) 890 (656) 1160 (856)
M42 2714 (2002) 2287 (1687) 1067 (787) 1447 (1067)
M45 3375 (2489) 1800 (1328)
M48 4084 (3012) 2178 (1606)
M64 9750 (7192) 5201 (3836)
M68 11768 (8680) 6277 (4630)
M76

Above mentioned torques are for all screwed unions, which works under dynamical load. For all other
connections you can use a corresponding smaller torque.

Exceptions have to be taken for the following position numbers:

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

PN 6571: for tie bolts made of material marked with (1) the torque value has to be reduced by 50%.
PN 6572.4: for all material classes the torque value has to be reduced by 40%.

Anchor bolts are usually made of 4.6 material. Tightening torques indicated in above table shall not be
exceeded.

6.5.2 Tightening sequence

Stage 1: Torque the bolts, following the illustrated sequence below, using 30% of the tightening torque
indicated in chapter 6.5.1.
Stage 2: Torque the bolts, following the illustrated sequence below, using 60% of the tightening torque
indicated in chapter 6.5.1.
Stage 3: Torque the bolts, following the illustrated sequence below, using 100% of the tightening torque
indicated in chapter 6.5.1.

Refer to sectional drawings for part numbers and

6.6 Setting impeller clearance identification.
For axial rotor setting see section 5 Commissioning
6.7.1 Dismantling of radial flow impeller pump
startup, operation and shutdown.
types
6.7 Disassembly 1) Completely drain the pump by using the drain
connection. By pumping explosive or toxic media,
flush it with Nitrogen.
Refer to section 1.6, Safety, before 2) Uncouple the pump from the motor and remove the
dismantling the pump. motor after disconnecting it from the electrical net.
3) Pull off the coupling hub from the pump shaft
[2110] and take out the key [6700.1].
Before dismantling the pump for
overhaul, ensure genuine Flowserve replacement
parts are available.

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

4) Secure the mechanical seal by putting the tool into

the groove of the shaft sleeve. Loose the shrunk Take care of the O-ring [4610.5].
ring, and disconnect the seal piping. 13) Pull off the impeller [2200.1] from the pump shaft
and remove the key [6700.3].
Drain the seal system, if 14) Pull off the pump bowl [1170.1], including the
applicable. diffuser [1410.1]. Now you can take off the
5) Drain the oil from the bearing housing using the interstage sleeve [2410.1] and the next stage
plug [6569.1]. Loose the studs [6572.4] and pull out impeller [2200.1].
the pump from it’s can.
6) Loose the socket head cap screw [6579.1] and slip Take care of the O-ring [4610.5].
down the rotor by turning the shaft nut [2910] and 15) Proceed with the next stage by repeating step 13
remove it. and 14, until the hydraulic section is completely
dismantled. For disassembly of column sections
If applicable pull off the fan [8161] proceed with step 8 – 10.
after loosing the grub screw [6814.3].
Use an anaerobic adhesive for securing the 6.7.2 Dismantling of mixed flow impeller pump
socket set screw for reassembly. types (Francis type)
1) Completely drain the pump by using the drain
If the pump is equipped with a rigid connection. By pumping explosive or toxic media,
spacer coupling open the socket head cap screws flush it with Nitrogen.
[6579.3] move the coupling half [7200], remove 2) Uncouple the pump from the motor and remove the
the intermediate coupling [7021], coupling ring motor after disconnecting it from the electrical net.
splits [7415], coupling half [7200] and keys 3) Pull off the coupling hub from the pump shaft
[6700.8]. [2110] and take out the key [6700.1].
7) Loose the studs [6572.1], take off the bearing 4) Secure the mechanical seal by putting the tool into
cover [3260.1] and remove key [6700.2]. the groove of the shaft sleeve. Loose the shrunk
ring, and disconnect the seal piping.
Take care of the springs [4260].
Pull off the bearing housing [3200]. Loose the Drain the seal system, if
studs [6572.2] and pull off the mechanical seal applicable.
cartridge. 5) Drain the oil from the bearing housing using the
plug [6569.1]. Loose the studs [6572.4] and pull out
To disassemble only the hydraulic the pump from it´s can.
section, start with point 11. 6) Loose the socket head cap screw [6579.1] and slip
8) Open the hexagon head bolt [6577.4] and down the rotor by turning the shaft nut [2910] and
disconnect the first column pipe from the remove it.
headstock [1141].
9) Pull out the complete bowl assembly together with If applicable pull off the fan [8161]
shafts and column pipes. Disconnect the first after loosing the grub screw [6814.3].
column pipe. Use an anaerobic adhesive for securing the
10) Open the socket head cap screws [6579.2] and slip socket set screw for reassembly.
upwards the shaft coupling [7020]. Remove the
coupling shell split [7240]. Now the shafts are If the pump is equipped with a rigid
uncoupled and you can proceed the same way spacer coupling open the socket head cap screws
with the next column pipe until the bowl assembly [6579.3] move the coupling half [7200], remove
can be disconnected from the intermediate or top the intermediate coupling [7021], coupling ring
shaft [2120.1 or 2130.1]. splits [7415], coupling half [7200] and keys
11) Remove the grub screw [6814.2] and open the [6700.8].
impeller nut [2912]. Pull off the distance sleeve 7) Loose the studs [6572.1], take off the bearing
[2460] and take out the key [6700.6]. cover [3260.1] and remove key [6700.2].

If the pump is fitted with an inducer Take care of the coupling shell splits
[2215], it has to be pulled off instead of the [7240].
spacer sleeve. Pull off the bearing housing [3200]. Loose the
12) Open the tie bolt and hexagon nut [6571, 6581.10] studs [6572.2] and pull off the mechanical seal
and remove the suction casing [1130] and suction cartridge.
bell [1310].

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

19) Remove the grub screw [6814.2] and open the

To disassemble only the impeller nut [2912.1].
hydraulic section start with point 11. 20) Follow the steps 11) to 15) to disassembly the rest
of the hydraulic.

If the pump is fitted with double suction 6.7.3 Dismantling of 10WUC-2H

impeller steps 16) till 19) have to be followed first.
1) Completely drain the pump by using the drain
8) Open the hexagon head bolts [6577.4] and
connection. By pumping explosive or toxic media,
disconnect the first column pipe from the
flush it with Nitrogen.
headstock [1141].
2) Uncouple the pump from the motor and remove the
9) Pull out the complete bowl assembly together with
motor after disconnecting it from the electrical net.
shafts and column pipes. Disconnect the first
3) Pull off the coupling hub from the pump shaft
column pipe.
[2110] and take out the key [6700.1].
10) Open the socket head cap screws [6579.2] and slip
4) Secure the mechanical seal by putting the tool into
upwards the shaft coupling [7020]. Remove the
the groove of the shaft sleeve. Loose the shrunk
coupling shell splits [7240]. Now the shafts are
ring, and disconnect the seal piping.
uncoupled and you can proceed the same way
with the next column pipe until the bowl assembly
can be disconnected from the top or intermediate Drain the seal system, if
shaft [2130.1 or 2120.1]. applicable.
11) Remove the grub screw [6814.2] and open the 5) Drain the oil from the bearing housing using the
impeller nut [2912]. Pull off the distance sleeve plug [6569.1]. Loose the studs [6572.4] and pull out
[2460] and take out the key [6700.6]. the pump from it´s can.
6) Loose the socket head cap screw [6579.1] and slip
If the pump is fitted with an inducer down the rotor by turning the shaft nut [2910] and
[2215], it has to be pulled off instead of the remove it.
spacer sleeve.
12) Open the hexagon head bolts [6577.7] and pull off If applicable pull off the fan [8161]
the stage casing [1160]. after loosing the grub screw [6814.3].
Use an anaerobic adhesive for securing the
Take care of the O-ring [4610.5]. socket set screw for reassembly.
Now you can pull off the interstage sleeve
[2410.1] from the pump shaft [2110]. If the pump is equipped with a rigid
13) Pull off the impeller [2200.1] from the pump shaft spacer coupling open the socket head cap
and remove the key [6700.3]. screws [6579.3] move the coupling half [7200],
14) Open the hexagon head bolts [6577.7] and pull remove the intermediate coupling [7021],
off the pump bowl [1170.1]. coupling ring splits [7415], coupling half [7200]
and keys [6700.8].
Take care of the O-ring [4610.5]. 7) Loose the studs [6572.1], take off the bearing
Pull off the second intermediate bearing sleeve cover [3260.1] and remove key [6700.2].
[3400.2] from the pump shaft [2110].
15) Proceed with the next stage by repeating step 13 Take care of the springs [4260].
and 14, until the hydraulic section is completely Pull off the bearing housing [3200]. Loose the
dismantled. For disassembly of column sections studs [6572.2] and pull off the mechanical seal
proceed with step 8 – 10. cartridge.
16) Remove the grub screw [6814.2] and open the
impeller nut [2912.2]. Pull off the distance sleeve To disassamble only the hydraulic
[2460] and take out the key [6700.12]. section start with point 11.
Open the hexagon head bolts [6577.11] and pull 8) Open the hexagon head bolts [6577.4] and
off the suction casing [1130]. disconnect the first column pipe from the
headstock [1141].
Take care of the O-ring [4610.7]. 9) Pull out the complete bowl assembly together with
Now you can pull off the bearing sleeve [3400.3] shafts and column pipes. Disconnect the first
from the pump shaft [2110]. column pipe.
17) Pull off the impeller [2200.3] from the pump shaft 10) Open the socket head cap screws [6579.2] and slip
and remove the key [6700.11]. upwards the shaft coupling [7020]. Remove the
18) Open the hexagon head bolts [6577.7] and pull coupling shell splits [7240]. Now the shafts are
off the diffusor suction casing [1410]. uncoupled and you can proceed the same way
with the next column pipe until the bowl assembly

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

can be disconnected from the top or intermediate 7) Loose the studs [6572.1], take off the bearing
shaft [2130.1 or 2120.1]. cover [3260.1] and remove the key [6700.2].
11) Open the tie bolt and hexagon nut [6571,
6581.10] and remove the suction casing [1130]. Take care of the springs [4260].
12) Remove the circlip [6544.2] and pull off the Pull off the bearing housing [3200]. Loose the
impeller [2200.1]. studs [6572.2] and pull off the mechanical seal
cartridge.
If the pump is fitted with an inducer
[2215], it has to be pulled off instead of the To disassemble only the hydraulic
spacer sleeve. section start with point 11.
13) Remove now the key [6700.3] and the next 8) Open the hexagon head bolts [6577.4] and
retaining ring. disconnect the first column pipe from the
headstock [1141].
Take care of the O-ring [4610.5]. 9) Pull out the complete bowl assembly together with
14) Pull off the pump bowl [1170.1], so you have shafts and column pipes. Disconnect the first
access to the next stage impeller. column pipe.
15) Repeat step 12, 13 and 14 until you reach the 10) Open the socket head cap screws [6579.2] and slip
last stage. upwards the shaft coupling [7020]. Remove the
16) Open the hexagon head bolts [6577.6], which coupling shell splits [7240]. Now the shafts are
connects the column pipe with the pump bowl uncoupled and you can proceed the same way
[1170.2] and remove it. with the next column pipe until the bowl assembly
can be disconnected from the top or intermediate
Pump bowl [1170.1] can be splitted in the shaft [2130.1 or 2120.1].
stage casing [1160] and the diffuser [1410.1]. Refer
to sectional drawing. For 20 WU pump the pump shaft
[2110] is especially coupled to the first
6.7.4 Dismantling of 20, 45 & 80WUC-2L intermediate shaft [2120.2] by a screwed
1) Completely drain the pump by using the drain coupling. Unscrew the intermediate shaft [2120.2]
connection. By pumping explosive or toxic media, from the coupling sleeve [7250]. Now unscrew
flush it with Nitrogen. the coupling sleeve [7250] from the pump shaft
2) Uncouple the pump from the motor and remove the [2110].
motor after disconnecting it from the electrical net.
3) Pull off the coupling hub from the pump shaft Both shafts have a left hand thread.
[2110] and take out the key [6700.1]. 11) Open the hexagon head bolts [6577.7] and pull off
4) Secure the mechanical seal by putting the tool into the suction casing [1130].
the groove of the shaft sleeve. Loose the shrunk
ring, and disconnect the seal piping. Take care of the O-ring [4610.5].
12) Remove the circlip [6544.2] and pull off the
Drain the seal system, if impeller [2200.1].
applicable.
5) Drain the oil from the bearing housing using the If the pump is fitted with an inducer
plug [6569.1]. Loose the studs [6572.4] and pull out [2215], it has to be pulled off instead of the
the pump from it´s can. spacer sleeve.
6) Loose the socket head cap screw [6579.1] and slip 13) Remove now the key [6700.3] and the next
down the rotor by turning the shaft nut [2910] and retaining ring.
remove it. 14) Open the hexagon head bolts [6577.7] and pull
off the pump bowl [1170.1], so you have access
If applicable pull off the fan [8161] to the next stage impeller.
after loosing the grub screw [6814.3].
Use an anaerobic adhesive for securing the Take care of the O-ring [4610.5].
socket set screw for reassembly. 15) Repeat step 12,13 and 14 until you reach the last
stage.
If the pump is equipped with a rigid 16) Open the hexagon head bolts [6577.6], which
spacer coupling open the socket head cap connects the column pipe with the last pump
screws [6579.3] move the coupling half [7200], bowl [1170.2] and remove it.
remove the intermediate coupling [7021], Pull off the second intermediate bearing sleeve
coupling ring splits [7415], coupling half [7200] [3400.2] from the pump shaft [2110].
and keys [6700.8].

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

6.7.5 Dismantling of the thrust bearing 20 WU-2L 64 (2.5) 0.3 - 0.5 (0.012-0.020)
20 WU-2R 112 (4.4) 0.4 - 0.6 (0.016-0.024)
Thrust bearing No. Bearing size 25 WU-2R 115 (4.5) 0.4 - 0.6 (0.016-0.024)
0N 7210 BECBJ (M) 30 WU-2R 112 (4.4) 0.4 - 0.6 (0.016-0.024)
35 WU-2R 112 (4.4) 0.4 - 0.6 (0.016-0.024)
1N 7313 BECBJ (M) 40 WU-2H 95 (3.7) 0.4 - 0.6 (0.016-0.024)
3N 7315 BECBJ (M) 45 WU-2L 87 (3.4) 0.3 - 0.5 (0.012-0.020)
45 WU-2R 112 (4.4) 0.4 - 0.6 (0.016-0.024)
4N 7317 BECBJ (M) 50 WU-2R 112 (4.4) 0.4 - 0.6 (0.016-0.024)
5N 7318 BECBJ (M) 50 WU-2M 85 (3.3) 0.4 - 0.6 (0.016-0.024)
50 WU-2H 140 (5.5) 0.5 - 0.7 (0.020-0.028)
6N 7322 BECBM 60 WU-2M 85( 3.3) 0.4 - 0.6 (0.016-0.024)
7N 7326 BCBM 60 WU-2R 112 (4.4) 0.4 - 0.6 (0.016-0.024)
65 WU-2R 148 (5.8) 0.5 - 0.7 (0.020-0.028)
7232 BCBM 80 WU-2L 103 (4.1) 0.4 - 0.6 (0.016-0.024)
8N
7330 BCBM 80 WU-2H 148 (5.8) 0.5 - 0.7 (0.020-0.028)
90 WU-2R 148 (5.8) 0.5 - 0.7 (0.020-0.028)
100 WU-2R 148 (5.8) 0.5 - 0.7 (0.020-0.028)
6.7.5.1 Bearing housing 3N – 8N 100 WU-2M 120 (4.7) 0.5 - 0.7 (0.020-0.028)
1) Remove the bearing assembly consisting of the 125 WU-2L 120 (4.7) 0.5 - 0.7 (0.020-0.028)
thrust ball bearing [3013.1], bearing adaptor 150 WU-2R 169 (6.7) 0.5 - 0.7 (0.020-0.028)
150 WU-2M 125 (4.9) 0,5 - 0.7 (0.020-0.028)
sleeve [2471], spacer ring [2510] and the bearing
180 WU-2L 135/171(5.3/6.7) 0.5 - 0.7 (0.020-0.028)
lock nut [3712] as a cartridge. 200 WU-2M 160 (6.3) 0.5 - 0.7 (0.020-0.028)
2) Open the bearing lock nut [3712] and pull off the 200 WU-2L 160 (6.3) 0.5 - 0.7 (0.020-0.028)
thrust ball bearing [3013.1] 200 WU-2R 169 (6.7) 0.5 - 0.7 (0.020-0.028)
200 WU-2H 140/165(5.5/6.5) 0.5 - 0.7 (0.020-0.028)
6.7.5.2 Bearing housing 0N – 1N 200 WU-4M 180 (7.1) 0.5 - 0.7 (0.020-0.028)
250 WU-4H 200 (7.9) 0.6 - 0.8 (0.024-0.032)
1) Remove the bearing assembly consisting of the 275 WU-2M 160 (6.3) 0.5 - 0.7 (0.020-0.028)
thrust ball bearing [3013.1], bearing adaptor 300 WU-2R 183 (7.2) 0.5 - 0.7 (0.020-0.028)
sleeve [2471] and the bearing lock nut [3712] as 300 WU-4H 230(9.1) 0.6 - 0.8 (0.024-0.032)
a cartridge. 0.5 - 0.7 / 0.6 - 0.8 (0.020-
300 WU-4M 190/230(7.5/9.1)
2) Open the bearing lock nut [3712] and pull off the 0.028 / 0.024-0.032)
thrust ball bearing [3013.1]. 300 WU-2L 160/190(6.3/7.5) 0.5 - 0.7 (0.020-0.028)
400 WU-4R 236 (9.3) 0.6 - 0.8 (0.024-0.032)
400 WU-4M 240 (9.5) 0.6 - 0.8 (0.024-0.032)
For the hydrodynamic thrust bearing 400 WU-4H 240 (9.5) 0.6 - 0.8 (0.024-0.032)
dismantling, refer to bearing manufacturer´s IOM. 450 WU-2R 183 (7.2) 0.5 - 0.7 (0.020-0.028)
500 WU-2L 191 (7.5) 0.5 - 0.7 (0.020-0.028)
600 WU-4M 265 (10.4) 0.6 - 0.8 (0.024-0.032)
6.8 Examination of parts 0.5 - 0.7 / 0.6 - 0.8 (0.020-
650 WU-2L 190/230(7.5/9.1)
1) Check the intermediate bearing sleeves and 0.028 / 0.024-0.032)
bushings against any wear. The diametrical 700 WU-4H 265 (10.4) 0.6 - 0.8 (0.024-0.032)
800 WU-4M 300 (11.8) 0.6 - 0.8 (0.024-0.032)
clearance between sleeves and bushings must
900 WU-4M 265 (10.4) 0.6 - 0.8 (0.024-0.032)
not exceed twice the value in new condition. 900 WU-4H 300 (11.8) 0.6 - 0,8 (0.024-0.032)
2) Check the casing wear ring and the impeller wear 1000 WU-4H 300 (11.8) 0.6 - 0,8 (0.024-0.032)
ring against any wear. The diametrical clearance 1200 WU-4H 330 (13.0) 0.7 - 0.9 (0.028-0.035)
between the rings must not exceed twice the 1200 WU-4L 330 (13.0) 0.7 - 0.9 (0.028-0.035)
value in new condition. 1400 WU-4M 354 (13.9) 1 - 1.2 (0.039-0.047)
3) Check all parts against corrosion and erosion. 1500 WU-4L 339 (13.4) 0.7 - 0.9 (0.028-0.035)
4) Carefully check the coupling against any wear. 1600 WU-4M 339 (13.4) 0.7 - 0.9 (0.028-0.035)
2000 WU-4L 360 (14.2) 1 - 1.2 (0.039-0.047)
5) Rotate the angular contact bearing by hand, to
2000 WU-4M 360 (14.2) 1 - 1.2 (0.039-0.047)
check against abnormal sound. Check the 2250 WU-4L 388 (15.3) 1 - 1.2 (0.039-0.047)
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.

Wear ring
Radial clearances
Pump size diameter mm
mm (in)
(in)
10 WU-2H 64 (2.5) 0.3 - 0.5 (0.012-0.020)

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

Bearing Sleeve Pipe Bearing Housing 6.9.2 Assembly of mixed flow impeller pump
Radial
Outside Bushing Inner types (Francis type)
clearance
diameter diameter
mm (in.)
mm (in.) mm (in.)
31.9 (1.24) 32 (1.25)
0.10÷0.12 Assembly is done preferably in vertical position.
(0.0039÷0.0047)
0.10÷0.12
51.9 (2.02) 52 (2.03)
(0.0039÷0.0047) 1) Put the interstage sleeve [2410.3] and the last
0.11÷0.13 stage casing over the pump shaft [2110], and slip
59.9 (2.34) 60 (2.34)
(0.0043÷0.0051) on the impeller [2200.1]. After putting the O-ring
0.11÷0.13 [4610.5] to the next pump bowl [1170.1], slip it on
71.9 (2.80) 72 (2.80)
(0.0043÷0.0051)
0.12÷0.15
to the last pump bowl [1170.2] and tight the
109.9 (4.29) 110 (4.29) hexagon head bolts [6577.7].
(0.0047÷0.0059)
0.12÷0.15 2) Slip on the interstage sleeve [2410.1]. Put in the
119.9 (4,68) 120 (4.68)
(0.0047÷0.0059) key [6700.3] and slip on the impeller [2200.1].
3) Repeat step 1 and 2 until you have mounted the
6.9 Assembly first stage impeller. If the pump is fitted with
To assemble the pump consult the sectional double suction impeller, move directly to step 8)
drawings. and follow procedure until step 15).
4) Slip on the interstage sleeve [2410.1] and put on
Ensure threads, gasket and O-ring mating faces are the suction casing [1130] including the O-ring
clean. Apply thread sealant to non-face sealing pipe [4610.5]. Tight the hexagon head bolts [6577.7].
thread fittings. 5) Put on the distance sleeve [2460] or inducer
[2215] and secure the assembly by tightening the
impeller nut [2912] just by hand.
After complete assembly with 6) Loose the impeller nut [2912] to the next location
headstock and bearing housing the rotor must be for securing it with a grub screw [6814.2].
lifted!, see section 5 .3 Impeller clearance 7) For further pump assembly follow reverse
disassembly procedure.
6.9.1 Assembly of radial flow impeller pump types 8) Secure the assembly by tightening the impeller
Assembly is done preferably in vertical position. nut [2912.1] just by hand.
1) Put the last stage diffuser [1410.2] into the 9) Loose the impeller nut [2912.1] to the next
discharge casing [1140]. Insert the O-ring location for securing it with a grub screw [6814.2].
[4610.5]. Repeat this with all the stage casings 10) Put the bearing sleeve [3400.5] over the pump
[1160], diffusers [1410.1] and O-rings [4610.5]. shaft [2110]. Place the o-ring [4610.5] on the
2) Put the discharge casing [1140] over the pump diffusor suction casing [1410] and put them
shaft [2110]. together over the pump shaft [2110]. Tighten the
3) Put in the key [6700.3] in the keyway and slip on hexagonal head bolts [6577.7].
the interstage sleeve [2410.2], the last stage 11) Put in the key [6700.11] and slip on the impeller
impeller [2200.1] and the interstage sleeve [2200.3] over the pump shaft [2110].
[2410.1] to the shaft. 12) Put the bearing sleeve [3400.3] on the pump
4) Put on the next stage casing assembly. Put the shaft [2110] and assemble the suction casing
key [6700.3] in the keyway and slip on the [1130] including the o-ring [4610.7]. Tighten the
impeller [2200.1] and the interstage sleeve hexagonal head bolts [6577.11].
[2410.1] to the shaft. 13) Put the key [6700.12] on the pump shaft [2110].
5) Repeat step 4 until you reach the first stage. After Put on the distance sleeve [2460] and secure the
slipping on the first stage impeller [2200.2] and assembly by tightening the impeller nut [2912.2]
the interstage sleeve [2410.2] you can put on the just by hand.
suction casing [1130]. 14) Loose the impeller nut [2912.2] to the next
6) Fix the hydraulic assembly by tightening the tie location for securing it with a grub screw [6814.2].
bolts [6571]. 15) For further pump assembly follow reverse
disassembly procedure.
This must be done croswise
6.9.3 Assembly of 10WUC-2H
with required torques.(refer to section 6,
Maintenance) Assembly is done preferably in vertical position.
7) Put on the distance sleeve [2460], or inducer 1) Put the last stage casing over the pump shaft
[2215] and secure the assembly by tightening the [2110]. After putting the O-ring [4610.5] to the
impeller nut [2912] just by hand. next pump bowl [1170.1], slip it on to the pump
8) Loose the impeller nut [2912] to the next location bowl [1170.2].
for securing it with a grub screw [6814.2]. 2) Put the circlip [6544.2] and the key [6700.3] on to
9) For further pump assembly follow reverse the shaft and slip on the impeller [2200.1].
disassembly procedure.

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

3) Secure the impeller with the retaining ring and 6.9.5 Assembly of the thrust bearing
put on the next pump bowl [1170.1] including an Thrust bearing No. Bearing size
O-ring [4610.5].
4) Repeat step 2 and 3 until you have mounted the 0N 7210 BECBJ (M)
first stage impeller. 1N 7313 BECBJ (M)
5) Put on the suction casing [1130] including the 3N 7315 BECBJ (M)
O-ring [4610.5] and tighten the tie bolt and
hexagon nut [6571, 6581.10]. 4N 7317 BECBJ (M)
6) For further pump assembly follow reverse 5N 7318 BECBJ (M)
disassembly procedure.
6N 7322 BECBM
7N 7326 BCBM
Pump bowl [1170.1] can be splitted in the
stage casing [1160] and the diffuser [1410.1]. Refer 7232 BCBM
8N
to sectional drawing. 7330 BCBM

6.9.4 Assembly of 20, 45 & 80WUC-2L 6.9.5.1 Bearing housing 3N – 8N

Assembly is done preferably in vertical position. 1) Heat up the first angular contact bearing, and put
1) Put the last stage casing over the pump shaft it on the bearing adaptor sleeve [2471] as shown
[2110]. After putting the O-ring [4610.5] to the in the section drawing.
next pump bowl [1170.1], slip it on to the last 2) Install the spacer ring [2510]. Warm up the other
pump bowl [1170.1] and tight the hexagon head two bearings and install it according to the
bolts [6577.7]. section drawing. Put on the lockwasher [6541] for
2) Put the circlip [6544.2] and the key [6700.3] on to bearing nut and the bearing lock nut [3712]. After
the shaft and slip on the impeller [2200.1]. tightening secure the bearing lock nut [3712] with
3) Secure the impeller with the retaining ring and the lockwasher [6541] for bearing nut.
put on the next pump bowl [1170.1] including an
O-ring [4610.5]. 6.9.5.2 Bearing housing 0N – 1N
4) Repeat step 2 and 3 until you have mounted the
first stage impeller. 1) Heat up the two bearings and install it according
5) Put on the suction bell [1310] including the O-ring to the section drawing.
[4610.5] and tighten the hexagon head bolts 2) Put on the lockwasher [6541] for bearing nut and
[6577.7]. the bearing lock nut [3712]. After tightening
6) For further pump assembly follow reverse secure the bearing lock nut [3712] with the
disassembly procedure. lockwasher [6541] for bearing nut.

For 20 WU pumps consider the For the hydrodynamic thrust bearing

screwed coupling of the pump shaft [2110] to the assembly refer to bearing manufacturer´s IOM.
last intermediate shaft [2120.2]. Screw the coupling
sleeve [7250] to the pump shaft [2110] until the 7.0 AUXILIARIES
shaft end appears in the bore of the sleeve. Now
screw the intermediate shaft [2120.1] into the
intermediate shaft [2120.2] until it matches the end
For additional accessories refer to
of the pump shaft [2110]. The coupling sleeve
separate Instrumentation manuals.
[7250] has a tolerance fit on both shafts to ensure
proper alignment. Consider the left hand thread
and use Loctite 243 to secure the threaded 7.1 Seal and seal systems
connection. 7.1.1 Single Mechanical Seal with API–Plan 23+61

Due to the threaded coupling

Refer to mechanical seal drawing and
the 20 WU pump must not turn in reverse
auxiliary piping drawing.
direction.
The pump is equipped with a single mechanical seal.
The cartridge design allows to change the
mechanical seal without taking it apart.

Actions before first start up:

The pump will be delivered with correct vertical
adjustment of the rotor.

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

Try to turn the rotor by hand.If Try to turn the rotor by hand.If the
the rotor cannot be turned readjust it following rotor cannot be turned readjust it following procedure
procedure in section 5.3.1 Adjusting of the rotor. in section 5.3.1 Adjusting of the rotor.
The mechanical seal requires no adjustment The mechanical seal requires no adjustment
anymore. Check if the mounting plates are anymore. Check if the mounting plates are already
alreadyswung out. swung out.

Actions after start up: Actions after start up:

Check all connections to the seal gland and the Check all connections to the seal gland and the
mechanical seal itself against leakage. It is usual that mechanical seal itself against leakage. Check the
at the seal faces a small leakage occurs after start temperature of the seal gland. I slight increase of
up, which decreases with the time of operation and temperature may be observed during the run in
should stop after the seal is run in. Check the period.
temperature of the seal gland. I slight increase of
temperature may be observed during the run in The faces of the inner mechanical seal are flushed by
period. The mechanical seal is flushed by an API the product (API Plan13). API Plan 13 provides self
Plan 23 and the temperature at the seal gland should venting although a blinded venting connection is
be below the pumped liquid temperature (refer to forseen. This connection shall be used by pumping
mechanical seal drawing for temperature limit). flushing hydrocarbons at ambiente temperatures and
above. The inner mechanical seal is subjected to
Plan 23 is the plan of choice for all hot water discharge pressure.Between the inner mechanical
services, and it is also disirable in many hydrocarbon seal and the outer (atmospheric) mechanical seal is a
and chemical services where it is necessary to cool liquid buffer fluid, which is unpressurized (API Plan
the fluid establish the required margin between fluid 52). The buffer fluid is contained in a seal pot (refer to
vapor pressure (at the seal chamber temperature) drawing of the seal pot), which is vented to a vent
and seal chamber pressure. In a Plan 23, the cooler system, thus maintaining the buffer fluid pressure
only removes seal face-generated heat plus heat close to atmospheric.
soak from the process. The seal chamber is isolated Inner seal leakage will be product leakage into the
by a pump throat bushing with a bypass to suction. buffer fluid. There will always be some leakage
(max.5 ml/hour).
API Plan 61 has tapped and plugged connections for Plan 52 is used for flashing liquids, which have a
the purchaser´s use. Typically this plan is used when vapour pressure higher then the buffer fluid pressure.
the purchaser is to provide fluid (such as steam, gas, or So the product will flash in the seal pot and the
water) to an external sealing device. vapour can escape to the vent system.
All screw / flange connections have to be proofed.
Straight screw joints made of stainless steel have to be
Refer to the GA - drawing for the tightened especially carefully.
required quench medium, pressure and flow.
Fill the seal system with a suitable
Disassembly of the seal cartridge buffer fluid (refer to lubrication table).
is only allowed by authorized personal. Contact
Flowserve for any service of the mechanical seal. We Ensure that the valve GV for the
recommend to have a spare cartridge seal on stock connection V is open (Barrier/buffer fluid vessel
for easy replacement. drawing).
7.1.2 Dual Mechanical Seal unpressurized with
API–Plan 13+52+61 Open the Block & Bleed valve to
allow proper function of the PSH (set point 0.5 bar
(7.25 psi) above flare pressure).
Refer to mechanical seal drawing and
auxiliary piping drawing.
Open all necessary valves in the
The pump is equipped with a dual mechanical seal.
cooling and auxiliary piping and check the flow.
The cartridge design allows to change the
mechanical seal without taking it apart.
API Plan 61 has tapped and plugged connections for
the purchaser´s use. Typically this plan is used when
Actions before first start up:
the purchaser is to provide fluid (such as steam, gas, or
The pump will be delivered with correct vertical
water) to an external sealing device.
adjustment of the rotor.

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Actions after start up:

Refer to the GA - drawing for the Check all connections to the seal gland and the
required quench medium, pressure and flow. 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
Disassembly of the seal cartridge should stop after the seal is run in. Check the
is only allowed by authorized personal. Contact temperature of the seal gland. I slight increase of
Flowserve for any service of the mechanical seal. We temperature may be observed during the run in
recommend to have a spare cartridge seal on stock period. The mechanical seal is flushed by an API
for easy replacement. Plan 13 and the temperature at the seal gland should
be max. 10 °C (18 °F) above the pumped liquid
7.1.3 Dual Mechanical Seal unpressurized with temperature, unless otherwise specified by
API–Plan 13+72+76 mechanical seal supplier.
API Plan 13 provides self venting although a blinded
venting connection is forseen. This connection shall
Refer to mechanical seal drawing and be used by pumping flushing hydrocarbons at
auxiliary piping drawing. ambiente temperatures and above. The seal
The pump is equipped with a dual mechanical seal. chamber is subjected to discharge pressure.
The cartridge design allows to change the
mechanical seal without taking it apart. Plan 76 is suitable only for fluids, where no
condensation of the inner seal leakage or from the
The seal cartridge consists of a contacting wet inner collection system will occur.
seal and a dry containment seal. A buffer gas is used Leakage from the inner mechanical seal is restricted
to sweep inner seal leakage away from the outer seal from escape by the containment seal and goes out
into a collection system and/or provide dilution of the the containment seal vent. An orifice in the outlet line
leakage, so that emissions from the containment seal of the collector restricts flow such that high leakage of
are reduced. the inner seal will cause a pressure increase and
The plan 72 system is intended to function as follows: trigger the PSH set at a gauge pressure of 0.7 bar
The barrier gas first flows through an isolation block (10 psi). The block valve in the outlet serves to isolate
valve and check valve provided by the purchaser. It the system for maintenance. It may also be used to
then enters a system, usually mounted on a plate or test the inner seal by closing while the pump is in
panel, provided by the seal vendor. An inlet block operation and noting the time/pressure buildup
valve on the panel is followed by a 10 µm (0.0004 in.) relationship in the collector. If specified, drain
filter coalescer (if specified) to remove any particles connection on the piping harness may be used to
and liquid that might be present. The gas then flows inject nitrogen or other gas for the purpose of testing
through a back pressure regulator (if specified) which the containment seal as well as for checking for any
is set at least 0.5 bar (7 psi) above atmospheric liquid buildup.
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 Disassembly of the seal cartridge
pressure is not above the seal chamber pressure. is only allowed by authorized personal. Contact
The last elements on the panel are a check valve and Flowserve for any service of the mechanical seal. We
block valve. Buffer gas is then routed to the seal recommend to have a spare cartridge seal on stock
using tubing. A containment seal vent (CSV) and for easy replacement.
drain (CSD) are also located on the gland. 7.1.4 Dual Mechanical Seal pressurized with
gascoffer dam and API–Plan 53a
The inner mechanical seal is flushed by an
API Plan 13. For temperatures below –50 °C (-58 °F) (cryogenic
service), a gascoffer dam shall always be used to
Actions before first start up: prevent the mechanical seal area from icing up. The
The pump will be delivered with correct vertical gascoffer dam consists of the de-gassing part
adjustment of the rotor. (chamber I) and the warm-up part (chamber II).
A throttle bushing between discharge head and
de-gassing chamber is provided, to reduce the
Try to turn the rotor by hand.If the discharge pressure to suction pressure. By reducing
rotor cannot be turned readjust it following procedure the pressure in the de-gassing chamber and the
in section 5.3.1 Adjusting of the rotor. simultaneous temperature rise, the pumped liquid will
The mechanical seal requires no adjustment partly vaporize.
anymore. Check if the mounting plates are already The de-gassing chamber has to be connected to the
swung out. suction tank, by means of a balancing line, which

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

must be kept open to guarantee that only suction

pressure occurs. Open all necessary valves in the
The additional throttle bushing with a flinger between cooling and auxiliary piping and check the flow.
chamber I and chamber II, is supplied for safety
reasons i.e. to exclude the eventual contact between
the medium and the barrier fluid. Disassembly of the seal cartridge
In the event of seal failure, the leakage of the barrier is only allowed by authorized personal. Contact
fluid will be collected in chamber II, to prevent any Flowserve for any service of the mechanical seal. We
contact with the pumped liquid. The loss of barrier recommend to have a spare cartridge seal on stock
fluid will be detected by a level switch, mounted on for easy replacement.
the seal reservoir. Chamber II is also provided with a Actions before first start up:
plugged drain. The pump will be delivered with correct vertical
The gascoffer dam is equipped with mechanical seals adjustment of the rotor.
in back to back arrangements, with API Plan 53a.
Advantages of the gascoffer dam design are:
a) no pollution of the pumped liquid by the barrier Try to turn the rotor by hand.If the
fluid rotor cannot be turned readjust it following procedure
b) only suction pressure is present at the inner in section 5.3.1 Adjusting of the rotor.
mechanical seal
c) mechanical seals are prevented from icing up Pump must be cooled down prior
to start up. Refer to section 5.7 Cool down procedure
The mechanical seal requires no adjustment for cryogenic service.
anymore. Check if the mounting plates are already
swung out. 7.2 Changing of mechanical seal
Actions after start up:
Check all connections to the seal gland and the
mechanical seal itself against leakage. Check the 7.2.1 Changing of mechanical seal with rigid
temperature of the seal gland. I slight increase of spacer type coupling
temperature may be observed during the run in 1) Completely drain the pump by using the drain
period. connection. By pumping explosive or toxic media,
flush it with Nitrogen.
Refer to mechanical seal drawing and 2) Secure the mechanical seal by putting the
auxiliary piping drawing. mounting plates into the groove of the shaft
The pump is equipped with a dual mechanical seal in sleeve. Loose the shrunk ring, and disconnect
back to back configuration. the seal piping.

Plan 53 pressurized dual seal systems are used in Drain the seal system, if
services where no leakage to atmosphere can be applicable.
tolerated. A Plan 53a system consists of dual 3) Loose the socket head cap screw [6579.1] and slip
mechanical seals with a liquid barrier fluid between down the rotor by turning the shaft nut [2910].
them. The barrier fluid is contained in a seal pot
which is pressurized to a pressure of approximately
1.5 bar (23 psi) greater than the pump seal chamber. If applicable pull off the fan [8161]
Inner seal leakage will be barrier fluid leakage into after loosing the grub screw [6814.3].
the product. There will always be some leakage Use an anaerobic adhesive for securing the
(max.5 ml/hour). socket set screw for reassembly.
The leakage rate is monitored by monitoring the seal 4) Open the socket head cap screws [6579.3] move
pot level. The gas coffer dam ensures that the the coupling half [7200] and remove the
product is not contaminated with barrier fluid. The intermediate coupling [7021].
seal pot pressure must be maintained at the proper 5) Now remove the coupling ring split [7415], the
level. If the seal pot pressure drops, the system will coupling half [7200] and the key [6700.8].
begin to operate like a Plan 52, or unpressurized dual 6) Loose the studs [6572.2] and pull off the
seal, which does not offer the same level of sealing mechanical seal cartridge.
integrity. Specifically, the inner seal leakage direction 7) For assembly follow the reverse procedure.
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).

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

7.3 Changing of mechanical seal

7.3.1 Changing of mechanical seal without rigid

spacer type coupling
1) Completely drain the pump by using the drain
connection. By pumping explosive or toxic
media, flush it with Nitrogen.
2) Pull off the coupling hub from the pump shaft
[2110] and take out the key [6700.1].
3) Secure the mechanical seal by putting the
mounting plates into the groove of the shaft
sleeve. Loose the shrunk ring, and disconnect the
seal piping.

Drain the seal system, if

applicable.
4) Drain the oil from the bearing housing using the
plug [6569.1].
5) Loose the socket head cap screw [6579.1] and slip
down the rotor by turning the shaft nut [2910] and
remove it. Take off the labyrinth ring [4330.1].

If applicable pull off the fan [8161]

after loosing the grub screw [6814.3].
6) Loose the studs [6572.1] take off the bearing cover
[3260.1] and remove the key [6700.2].

Take care of the springs [4260].

Pull off the bearing housing [3200]. Loose the
studs [6572.2] and pull off the mechanical seal
cartridge.
7) For assembly follow reverse procedure.

Adjust the rotor axialy according to

section 5.3 Impeller clearance.

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8.0 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
⇓ Pump requires excessive power
⇓ Pump loses prime after starting
⇓ Insufficient pressure developed
⇓ Insufficient capacity delivered
⇓ Pump does not deliver liquid
⇓ PROBABLE CAUSES POSSIBLE REMEDIES
A. SYSTEM TROUBLES
  Pump not primed. Check complete filling
    Pump or suction pipe not completely filled with
Check and complete filling
liquid.
     Check NPSHa>NPSHr, proper submergence,
Suction lift too high or level too low.
losses at strainers / fittings
   Excessive amount of air or gas in liquid. Check and purge from pipes
   Air or vapor 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, Check airtight assembly then joints and
sleeve joints, casing joint or pipe lugs. gaskets
  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
   Check headstock and head losses in
Total head of system higher than differential
discharge pipe at the valve settings. Check
head of pump.
back pressure is not too high
 Total head of system lower than pump design Throttle at discharge valve or ask Flowserve if
head. the impeller can be trimmed
 Specific gravity of liquid different from design. Consult Flowserve
   Viscosity of liquid differs from that for which
Consult Flowserve
designed.
  Operation at very low capacity. Measure value and check minimum permitted
   Measure value and check maximum
Operation at high capacity.
permitted
B. MECHANICAL TROUBLES
      Check the flange connections and eliminate
Misalignment due to pipe strain. strains using elastic couplings or a method
permitted
 Check setting of baseplate: tighten, adjust,
Improperly designed foundation.
grout base as required
     Shaft bent. Check shaft runouts within acceptable values
    Rotating part rubbing on stationary part Check for signs of this and consult Flowserve
internally. if necessary
     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
   Check alignment of faces or damaged parts
Mechanical seal improperly installed.
and assembly method used

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

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
⇓ Insufficient capacity delivered
⇓ Pump does not deliver liquid
⇓ PROBABLE CAUSES POSSIBLE REMEDIES
   Incorrect type of mechanical seal for operating
Consult Flowserve
conditions.
     Check misalignment and correct if necessary.
Shaft running off centre because of worn
If alignment satisfactory check bearings for
bearings or misalignment.
excessive wear
     Impeller out of balance resulting in vibration. Check and consult Flowserve
   Abrasive solids in liquid pumped. Check and consult Flowserve
  Check mechanical seal condition and source
Mechanical seal was run dry.
of dry running and repair
  Internal misalignment due to improper repairs Check method of assembly, possible damage
causing impeller to rub. or state of cleanliness during assembly
   Excessive thrust caused by a mechanical Check wear condition of Impeller, its
failure inside the pump. clearances and liquid passages
  Excessive grease in ball bearings. Check method of regreasing
  Check hours run since last change of
Lack of lubrication for bearings.
lubricant, the schedule and its basis
  Check method of assembly, possible damage
Improper installation of bearings or state of cleanliness during assembly and
type of bearing used
  Check contamination source and replace
Damaged bearings due to contamination.
damaged bearings
C. ELECTRICAL TROUBLES
    Wrong direction of rotation. Reverse 2 phases on motor terminal box
   Motor running too slow, Check motor terminal box connections

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

9.0 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.

10.0 OTHER RELEVANT

DOCUMENTATION AND MANUALS

10.1 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.

10.2 Change notes

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

10.3 Additional sources of information

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

Reference 2:
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.

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

10.4 Abbreviations

ISO unit Multiplication US unit

Quantity ISO unit US unit
abbreviation Factor 1 Abbreviation

square metre m² 10.764 square feet ft²

Area
square centimetre cm² 0.155 square inch in.²

Capacity or Cubic US Gallons/

m³/h 4.4033 US gpm
Flow rate metre/hour minute

Force Newton N 0.2248 pound.force lbf

Head metre m 3.28084 feet ft

British
Heat Energy kilojoule kJ 0.9478 Btu
thermal unit
metre m 3.28084 feet ft
Length millimetre mm 0.03937 inch in.
micrometre µm 0.00003937 inch in.

kilogram kg 2.20462 pounds lb.

Mass
gram g 0.035274 ounces oz.

Moment of kilogram pounds

kg.m² 23.73 lb.ft²
Interia square metre square feet

Noise 4 decibel dBA

Power kilowatt kW 1.34102 horsepower hp

Pressure 2 bar bar 14.5 pounds/in.² psi

Rotational
revs per minute r/min
Speed
Newton/square
Stress N/mm² 145.0 pounds/in.² psi
millimetre
degrees degrees
Temperature °C (1.8 x °C) + 32 °F
Celsius Fahrenheit

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

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

metre/second m/s 3.28084 feet/second ft/sec

Velocity
millimetre/second mm/s 0.03937 inches/second in./sec

millimetre/ inches/
Vibration 3
second mm/s 0.03937 second in./sec

Viscosity square millimetre/

cSt
second or centiStoke

cubic metre m³ 264.2 US Gallons US gal.

Volume
litre l 33.81 fluid ounce Fl.oz.

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

applicable

Page 53 of 55
 WUC USER INSTRUCTIONS ENGLISH - 05/16

AFTERMARKET DIRECTORY
OUR ADRESS
Flowserve (Austria) GmbH Tel: +43 / 2236 / 31530
Industriestraße B/6 Fax: +43 / 2236 / 33430
A-2345 Brunn/Geb., AUSTRIA Mail: flowserve-brunn@flowserve.com

MESSAGES CAN BE LEFT ALSO ON OUR ANSWERING MACHINE

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

Please quote your service:

Name of Company: ………………………… Pumpdata:
Contact person:.……………………….. Type: ………………….
Telephone: …………….…………........... Serialno.: …….......…….....
Fax: ...…………………………………....
e-mail: ………………………………………
Country: ………………………………………

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 WUC USER INSTRUCTIONS ENGLISH - 05/16

FLOWSERVE REGIONAL
Your Flowserve factory contacts: SALES OFFICES:

Flowserve (Austria) GmbH USA and Canada

Industriestraße B6 Flowserve Corporation
2345 Brunn am Gebirge 5215 North O’Connor Blvd.
Austria Suite 2300
Irving, Texas 75039-5421, USA
Telefon: +43 2236 31530
Telephone: +1 937 890 5839
Fax: +43 2236 33430
E.mail: flowserve-brunn@flowserve.com
Europe, Middle East, Africa
Flowserve Corporation
Parallelweg 13
4878 AH Etten-Leur
The Netherlands
Telephone: +31 76 502 8100

Latin America
Flowserve Corporation
Martín Rodriguez 4460
B1644CGN-Victoria-San
Fernando
Buenos Aires, Argentina
Telephone: +54 11 4006 8700
Telefax: +54 11 4714 1610

Asia Pacific
Flowserve Pte. Ltd.
10 Tuas Loop
Singapore 637345
Telephone: +65 6771 0600
Telefax: +65 6862 2329