FLOWSERVE HWMA User Manual

USER INSTRUCTIONS

HWMA centrifugal pumps

ONE STAGE, VERTICAL-INLINE

Original Instructions
PCN= 26999922 11-10 (E)

Installation

Operation

Maintenance

HWMA USER INSTRUCTIONS ENGLISH 11/10

Type: HWMA
Size: 2x3x12 HWMA
Serial No:
Customer:
Customer Order No.:
Equipment / Item No.:
Pumped Liquid:
Capacity: m3/h
Minimum Capacity: m3/h
Head: m
Speed: U/min-1

HWMA USER INSTRUCTIONS ENGLISH 11/10

CONTENTS

PAGE

1.0 INTRODUCTION AND SAFETY............................4

1.1 GENERAL.................................................................4

1.2 CE MARKING AND APPROVALS................................4

1.3 DISCLAIMER.............................................................4

1.4 COPYRIGHT .............................................................4

1.5 DUTY CONDITIONS...................................................4

1.6 SAFETY....................................................................5

1.7 WARNING LABEL...................................................... 9

1.8 SPECIFIC MACHINE PERFORMANCE.......................10

1.9 NOISE LEVEL.......................................................... 10

1.10 CE DECLARATION............................................... 12

2.0 TRANSPORT AND STORAGE............................13

2.1 CONSIGNMENT RECEIPT AND UNPACKING............. 13

2.2 HANDLING..............................................................13

2.3 LIFTING ..................................................................13

2.4 STORAGE...............................................................13

2.5 RECYCLING AND END OF PRODUCT LIFE ............... 13

3.0 DESCRIPTION........................................................14

3.1 CONFIGURATION....................................................14

3.2 NOMENCLATURE.................................................... 14

3.3 DESIGN OF MAJOR PARTS ..................................... 14

3.4 PERFORMANCE AND OPERATING LIMITS ...............14

7.0 AUXILIARIES ......................................................... 27

8.0 FAULTS; CAUSES AND REMEDIES................ 29

9.0 CERTIFICATION.................................................... 31

10.0 OTHER RELEVANT DOCUMENTATION AND

MANUALS..................................................................... 31

6.9 ASSEMBLY............................................................. 27

7.1 SEAL AND SEAL SYSTEMS .....................................27

7.2 CHANGING OF MECHANICAL SEAL......................... 29

10.1 SUPPLEMENTARY USER INSTRUCTIONS.............. 31

10.2 CHANGE NOTES................................................... 31

10.3 ADDITIONAL SOURCES OF INFORMATION............ 31

10.4 ABBREVIATIONS .................................................. 32

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

4.1 LOCATION ..............................................................14

4.2 PART ASSEMBLIES ................................................ 14

4.3 FOUNDATION .........................................................14

4.4 INITIAL ALIGNMENT ................................................15

4.5 PIPING....................................................................16

4.6 ELECTRICAL CONNECTIONS ..................................16

4.7 FINAL SHAFT ALIGNMENT CHECK...........................17

5.0 COMMISSIONING START-UP, OPERATION

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

5.1 PRECOMMISSIONING PROCEDURE ........................17

5.2 PUMP LUBRICANTS................................................17

5.3 IMPELLER CLEARANCE........................................... 21

5.4 DIRECTION OF ROTATION ...................................... 21

5.5 GUARDING.............................................................21

5.6 PRIMING AND AUXILIARY SUPPLIES ....................... 21

5.7 STARTING THE PUMP............................................. 21

5.8 OPERATION............................................................22

5.9 STOPPING AND SHUTDOWN ..................................22

5.10 HYDRAULIC, MECHANICAL AND ELECTRICAL DUTY

.....................................................................................22

6.0 MAINTENANCE.....................................................23

6.1 GENERAL............................................................... 23

6.2 MAINTENANCE SCHEDULE.....................................23

6.3 SPARE PARTS........................................................24

6.4 RECOMMENDED SPARES.......................................25

6.5 FASTENER TORQUES.............................................25

6.6 SETTING IMPELLER CLEARANCE............................26

6.7 DISASSEMBLY........................................................26

6.8 EXAMINATION OF PARTS........................................ 26

Page 3 of 34

1.0 INTRODUCTION AND SAFETY

1.1 General

These Instructions must always be kept

close to product's operating location or directly
with the product.

Flowserve's products are designed, developed and
manufactured with state-of-the-art technologies in
modern facilities. The unit is produced with great care
and commitment to continuous quality control,
utilising sophisticated quality techniques, and safety
requirements.
Flowserve is committed to continuous quality
improvement and being at service for any further
information about the product in its installation and
operation or about its support products, repair and
diagnostic services.
These instructions are intended to facilitate
familiarization with the product and its permitted use.
Operating the product in compliance with these
instructions is important to help ensure reliability in
service and avoid risks. The instructions may not take
into account local regulations; ensure such
regulations are observed by all, including those
installing the product. Always coordinate repair
activity with operations personnel, and follow all plant
safety requirements and applicable safety and health
laws/regulations.

HWMA USER INSTRUCTIONS ENGLISH 11/10

1.3 Disclaimer

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

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

1.4 Copyright

All rights reserved. No part of these instructions may
be reproduced, stored in a retrieval system or
transmitted in any form or by any means without prior
permission of Flowserve.

These instructions should be read

prior to installing, operating, using and
maintaining the equipment in any region
worldwide. The equipment must not be put into
service until all the conditions relating to safety
noted in the instructions have been met.

1.2 CE marking and approvals

It is a legal requirement that machinery and
equipment put into service within certain regions of
the world shall conform with the applicable CE
Marking Directives covering Machinery and, where
applicable, Low Voltage Equipment, Electromagnetic
Compatibility (EMC), Pressure Equipment Directive
(PED) and Equipment for Potentially Explosive
Atmospheres (ATEX).
Where applicable the Directives, and any additional
Approvals, cover important safety aspects relating to
machinery and equipment and the satisfactory
provision of technical documents and safety
instructions. Where applicable this document
incorporates information relevant to these Directives.
To establish Approvals and if the product itself is CE
Marked check the serial number plate and the
Certification.

1.5 Duty conditions

This product has been selected to meet the
specifications of your purchaser order. The
acknowledgement of these conditions has been sent
separately to the Purchaser. A copy should be kept
with these instructions.

The product must not be operated beyond
the parameters specified for the application. If
there is any doubt as to the suitability of the
product for the application intended, contact
Flowserve for advice, quoting the serial number.

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

Page 4 of 34

1.6 Safety

1.6.1 Summary of safety markings

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

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

This symbol indicates safety instructions

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

This symbol indicates "hazardous and toxic

fluid" safety instructions where non-compliance would
affect personal safety and could result in loss of life.

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

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

HWMA USER INSTRUCTIONS ENGLISH 11/10

1.6.2 Personnel qualification and training

All personnel involved in the operation, installation,
inspection and maintenance of the unit must be
qualified to carry out the work involved. If the
personnel in question do not already possess the
necessary knowledge and skill, appropriate training
and instruction must be provided. If required the
operator may commission the manufacturer / supplier
to provide applicable training.
Always co-ordinate repair activity with operations and
health and safety personnel, and follow all plant
safety requirements and applicable safety and health
laws/regulations.

1.6.3 Safety action

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

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

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

This symbol indicates explosive atmosphere

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

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

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

This symbol indicates potential risks

connected with extremely high temperatures.

This symbol indicates potential risks

connected with extremely low temperatures.

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

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

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

Page 5 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

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

NEVER RUN THE PUMP DRY

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

DO NOT RUN THE PUMP AT
ABNORMALLY HIGH OR LOW FLOW RATES
Operating at a flow rate higher than normal or at a
flow rate with no back pressure on the pump may
overload the motor and cause cavitation. Low flow
rates may cause a reduction in
overheating of the pump, instability and
cavitation/vibration.

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

pump/bearing life,

HANDLING COMPONENTS

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

NEVER DO MAINTENANCE WORK WHILST THE
UNIT IS CONNECTED TO POWER

HAZARDOUS LIQUIDS

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

Gland Packing must not be used when pumping
hazardous liquids.

condition these are extremely dangerous and skin
contact must be avoided.

GUARDS MUST NOT BE REMOVED WHILE

PUMP IS OPERATIONAL

THERMAL SHOCK

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

NEVER APPL Y HEAT TO REMOVE

IMPELLER
Trapped lubricant or vapour could cause an
explosion.

HOT AND COLD PAR TS

If hot or freezing components or auxiliary heating
supplies can present a danger to operators, they
must

be shielded to avoid accidental contact. If

complete protection is not possible, the machine
access must be limited to maintenance staff only.
Note: bearing housings must not be insulated and
drive motors and bearings may be hot.

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

1.6.4 Products used in potentially explosive
atmospheres

Measures are required to:

• Avoid excess temperature

• Prevent build up of explosive mixtures

• Prevent the generation of sparks

• Prevent leakages

• Maintain the pump to avoid hazard

The following instructions for pumps and pump units
when installed in potentially explosive atmospheres
must be followed to help ensure explosion protection.
Both electrical and non-electrical equipment must
meet the requirements of European Directive
94/9/EC.

1.6.4.1 Scope of compliance

DRAIN PUMP AND ISOLATE PIPEWORK

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

FLUORO-ELASTOMERS (When fitted)

When a pump has experienced temperatures over
250 °C (482 ºF), partial decomposition of fluoro­elastomers (example: Viton) will occur . In this

Page 6 of 34

Use equipment only in the zone for which it is
appropriate. Always check that the driver, drive
coupling assembly, seal and pump equipment are
suitably rated and/or certified for the classification of
the specific atmosphere in which they are to be
installed.

Where Flowserve has supplied only the bare shaft
pump, the Ex rating applies only to the pump. The

HWMA USER INSTRUCTIONS ENGLISH 11/10

party responsible for assembling the pump set shall
select the coupling, driver and any additional
equipment, with the necessary CE Certificate/
Declaration of Conformity establishing it is suitable for
the area in which it is to be installed.

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

1.6.4.2 Marking

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

II 2 GD c IIC135ºC (T4)

Equipment Group
I = Mining
II = Non-mining

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

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

c = Constructional safety
(in accordance with En13463-5)
Gas Group (Equipment Category 2 only)
IIA – Propane (Typical)
IIB – Ethylene (Typical)
IIC – Hydrogen (T y pical)

Maximum surface temperature (Temperature Class)
(see section 1.6.4.3)

1.6.4.3 Avoiding excessive surface temperatures

Temperature

class to

EN 13463-1

T6
T5
T4
T3
T2
T1

Maximum

surface

temperature

permitted

85 °C (185 °F)

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

Temperature limit of liquid

handled (* depending on

material and construction

variant - check which is

lower)
Consult Flowserve
Consult Flowserve

110 °C (230 °F) *
175 °C (347 °F) *
270 °C (518 °F) *
350 °C (662 °F) *

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

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

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

Where there is any risk of the pump being run against
a closed valve generating high liquid and casing
external surface temperatures it is recommended that
users fit an external surface temperature protection
device.

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

1.6.4.4 Preventing the build up of explosive
mixtures

ENSURE THE EQUIPMENT TEMPERATURE

CLASS IS SUITABLE FOR THE HAZARD ZONE
Pumps have a temperature class as stated in the

ATEX Ex rating on the nameplate. These are based
on a maximum ambient of 40 °C (104 °F); refer to
Flowserve for higher ambient temperatures.

The surface temperature on the pump is influenced
by the temperature of the liquid handled. The
maximum permissible liquid temperature depends on
the temperature class and must not exceed the
values in the table that follows. The temperature rise
at the seals and bearings and due to the minimum
permitted flow rate is taken into account in the
temperatures stated.

Page 7 of 34

ENSURE THE PUMP IS PROPERLY FILLED

AND VENTED AND DOES NOT RUN DRY
Ensure the pump and relevant suction and discharge

pipeline system is totally filled with liquid at all times
during the pump operation, so that an explosive
atmosphere is prevented. In addition it is essential to
make sure that seal chambers, auxiliary shaft seal
systems and any heating and cooling systems are
properly filled.

If the operation of the system cannot avoid this
condition the fitting of an appropriate Dry Run
protection device is recommended (eg liquid
detection or a Power Monitor).

HWMA USER INSTRUCTIONS ENGLISH 11/10

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

1.6.4.5 Preventing sparks

To prevent a potential hazard from mechanical
contact the coupling guard must be non-sparking and
anti-static.

To avoid the potential hazard from random induced
current generating a spark the earth contact on the
baseplate must be used.

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

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

1.6.4.5 Preventing leakage

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

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

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

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

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

1.6.4.6 Maintenance to the centrifugal pump to
avoid the hazard

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

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

To avoid potential explosion hazards during
maintenance, the tools, cleaning and painting

materials used must not give rise to sparking or
adversely affect the ambient conditions. Where there
is a risk from such tools or materials, maintenance
must be conducted in a safe area.
It is recommended that a maintenance plan and
schedule is adopted (see section 6, Maintenance).to
include the following.

a) Any auxiliary systems installed must be

monitored, if necessary, to ensure they function
correctly.

b) Gland packings must be adjusted correctly to

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

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

correct functioning of the shaft seal must be
checked regularly

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

show a lubricant change is required.

e) Check that the duty condition is in the safe

operating range for the pump.

f) Check vibration, noise level and surface

temperature at the bearings to confirm
satisfactory operation.

g) Check dirt and dust is removed from areas

around close clearances, bearing housings and
motors.

h) Check coupling alignment and re-align if

necessary.

Page 8 of 34

1.7 Warning label

HWMA USER INSTRUCTIONS ENGLISH 11/10

Page 9 of 34

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 L
m (3.3 ft) from the machine, for “free field
conditions over a reflecting plane”.
For estimating sound power level L

WA

then add 14 dBA to the sound pressure value.

at 1

pA

(re 1 pW)

HWMA USER INSTRUCTIONS ENGLISH 11/10

Page 10 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

Octave MID BAND frequency [Hz]

3000 rpm
1500 rpm
3600 rpm
1800 rpm

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)

72 62 66 66 64 64 64 62 57
66 56 60 60 58 58 58 56 51
74 64 68 68 66 66 66 64 59
67 57 61 61 59 59 59 57 52

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

Note :

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

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

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

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

- Equipment is located in a free field above a reflecting plane in which the reductionin noise level
in all directions is 6db in each octave band for each doubling of distance.

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

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

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 @

required impeller

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

01246910

10.5 03 2.5 2 1.5

PLC in

dB

Page 11 of 34

1.10 CE Declaration

HWMA USER INSTRUCTIONS ENGLISH 11/10

Page 12 of 34

2.0 TRANSPORT AND STORAGE

2.1 Consignment receipt and unpacking

Immediately after receipt of the equipment it must be
checked against the delivery/ shipping documents for
its completeness and that there has been no damage
in transportation. Any shortage and or damage must
be reported immediately to Flowserve and received in
writing within one month of receipt of the equipment.
Latter claims cannot be accepted.
Check any create/boxes/wrappings for any
accessories or spare parts, which may be packed
separately with the equipment or attached to side
walls of the box or equipment.
Each product has a unique serial number. Check that
this number corresponds with that advised and
always quote this number in correspondence as well
as when ordering spare parts or further accessories.

2.2 Handling

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

2.3 Lifting

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

Take care by applying slings or ropes about

auxiliary piping and seal systems.

HWMA USER INSTRUCTIONS ENGLISH 11/10

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

2.4 Storage

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

2.4.1 Long period storage

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

2.5 Recycling and end of product life

At the end of the service life of the product or its
parts, the relevant materials and parts should be
recycled or disposed of using an environmentally

Page 13 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

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 HWMA belongs to Flowserves family of
API 610 vertical inline pumps.
The hydraulics are designed for operating flexibility
and consist of:

• a semi open radial vaned impeller to guarantee

optimum performance

• a circular volute with a single caned diffuser to

minimize hydraulic forces
The pump unit is available in two stage opposed
impeller configuration. For low NPSHA applications
an inducer is available.

The sense of rotation of the pump is counter

clockwise (CCW), looking from the coupling to the
shaft end of the pump.

3.2 Nomenclature

Example:
2x3x12HWMA - Ind.

2 Discharge flange in inch
3 Suction flange in inch
12 max. impeller size in inch
Ind indicates Inducer as option

3.3 Design of major parts

3.3.1 Pump casing

The pump casing is directly flanged to the motor
stand, which itself is flanged to the motor. Back pull
out design for easy maintenance, so the casing
remains on its foundation in case of repair.

3.3.2 Hydraulics

A circular volute in combination with a single caned
diffuser is inserted into the pump casing. A radial
vaned semi open impeller is used to ensure optimal
performance.

3.4 Performance and operating limits

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

4.0 INSTALLATION

Equipment operated in hazardous locations
must comply with the relevant explosion protection
regulations, see section 1.6.4, Products used in

potentially explosive atmospheres.

4.1 Location

The pump should be located to allow room for
access, ventilation, maintenance and inspection with
ample headroom for lifting and should be as close as
practicable to the supply of liquid to be pumped.

Refer to the general arrangement drawing for the
pump set.

4.2 Part Assemblies

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

4.3 Foundation

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

4.3.1 Horizontal alignmen t of the bas eplate

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

baseplate length.

Page 14 of 34

The max. misalignment is 0.5 mm/m

HWMA USER INSTRUCTIONS ENGLISH 11/10

4.3.2 Steel foundation

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

4.3.3 Concrete foundation

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

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

Align the motor to the pump, not the pump to the
motor. Alignment of the motor is achieved by using
the adjustment screws.

4.4.1 Permissible misalignment limits at working

temperature

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

The pump is only pre-aligned! Carefully check
and readjust alignment before start of the unit.
Take out the spacer of the coupling and check the
alignment of shafts end of pump and driver. The
maximum parallel offset should not exceed 0.05 mm
(0.002 in.)and the axially offset can be ± 1 mm (0.04
in.).

For more details refer to the manufacturer’s

instruction manual of coupling.

a)

4.4 Initial alignment

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

b)

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

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

b) Axially Offset: Another offset is the displacement

of one or both of the shafts. A typical example is
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
match the spacer. This results in an axial clearance
"x" between coupling hub and shaft end, which is
taken into account by the coupling selection.

Ensure pump and driver are isolated electrically and
the half couplings are disconnected.

Page 15 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

pressure and hence reverse rotation when the unit is
stopped.
Piping and fittings shall be flushed before use. To
avoid damages of the pump install a Y-strainer or a
strainer of 40 mesh.
Piping for corrosive liquids shall be arranged to allow
pump flushing before removal of a unit.

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

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

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

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

the concentricity by turning of both hubs; correct it if

necessary.
If the pump is handling hot liquid, the alignment must
be rechecked in warm condition of the unit.
The alignment of the unit shall be checked again after
200 service hours.

4.5 Piping

4.5.2 Drain

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

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

4.6 Electrical connections

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

It is important to be aware of the EUROPEAN
DIRECTIVE on hazardous areas where compliance
with IEC60079-14 is an additional requirement for
making electrical connections.

4.5.1 General

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

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

(use of wrenches, crane,...). Piping shall be
aligned without residual stress.

c) Do not mount expansion joints so that their force,

due to internal pressure, acts on the pump flange.

Fitting an isolator and non-return valves can allow
easier maintenance. Never throttle pump on suction
side and never place a valve directly on the pump
inlet nozzle.
A non-return valve shall be located in the discharge
pipework to protect the pump from excessive back

It is important to be aware of the EUROPEAN
DIRECTIVE on electromagnetic compatibility when
wiring up and installing equipment on site. Attention
must be paid to ensure that the techniques used
during wiring/installation do not increase
electromagnetic emissions or decrease the
electromagnetic immunity of the equipment, wiring or
any connected devices. If in any doubt contact
Flowserve for advice.

The motor must be wired up in accordance with the
motor manufacturer's instructions (normally supplied
within the terminal box) including any temperature,
earth leakage, current and other protective devices
as appropriate. The identification nameplate should
be checked to ensure the power supply is
appropriate.

A device to provide emergency stopping must

be fitted.
If not supplied pre-wired to the pump unit the

controller/starter electrical details will also be supplied
within the controller/starter.

Page 16 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

For electrical details on pump sets with controllers
see the separate wiring diagram.

See section 5.5, Direction of
rotation before connecting the motor to the electrical
supply.

4.7 Final shaft alignment check

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

5.0 COMMISSIONING START-UP,
OPERATION AND SHUTDOWN

These operations must be
carried out by fully qualified personnel.

5.1 Precommissioning procedure

a) The bearing housing must be filled with the

indicated oil. Check also the oil level.

b) The pump must be completely filled with liquid to

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

c) During filling the pump shall reach the speci fied

temperature, so pumps for hot liquids (T > 100 °C
(212 °F)) shall be warmed up by preflushing.

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

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

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

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

f) Check the readiness of all auxiliary systems (seal

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

g) All pipe work, including the internal and the

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

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

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

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

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

5.2 Pump Lubricants

5.2.1 Oil Lubricated Ball Bearings

The leveling rod of the oiler (see figure) must be
adjusted when the oiler is installed and the bearing
housing is filled with oil for the first time, and the rod
should be checked for proper adjustment each time
the reservoir of the oiler is replenished. To install the
oiler and to establish the correct oil level which the
oiler will automatically maintain, proceed as follows:

1) Loosen thumb screw, and remove reservoir.
Place the adjusting nut so that the edge of the
reservoir will rest 0.35 to 0.39 in. (9 to 10 mm)
above the centerline of the side port. This should
result in the lock nut and adjusting nut being 0.08”
(2) mm above the bottom of the leveling rod.

2) Install short piece of ¼ in. pipe in threaded
connection on side of inner bearing housing
cover. Mount oiler body on free end of ¼ in. pipe,
leaving it upright and level.

Use high grade turbine type mineral oil
(ISO GRADE 68) which has qualities for inhibiting
rust, oxidation and foam; has no free acid, chlorine or
sulfur; and has no more than a trace of free alkali.

3) Remove the oil breather and watch the oil

sightglass on side of the inner bearing housing
cover. Slowly fill housing with the specified
lubricating oil (see Note above) until the oil level
rises to the middle of the sightglass on side of the
inner bearing housing cover. Approximately
amount of oil is 40 oz. (1,2 l).

Do not overfill bearing housing

4) Fill the oiler reservoir with lubricating oil so that it

is 100 percent full, install it on oiler body, and
tighten thumb screws.

5) Oiler reservoir should not empty completely. It

should maintain oil level set up by overfill hole.

Page 17 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

5.2.2 Purge oil mist l ubric atio n

For preventing, that dirt or humidity get into the bearing
housing, this pump is equipped with a ¼“ NPT
connection for air or nitrogen supply.
Also at standstill the air or nitrogen supply shall be
maintained.

The pressure shall be between

0.01 bar (0.14 psi) and 0.02 bar (0.29 psi), otherwise
you have to consider an oil leakage and as a result a
bearing damage.
The provided flow rate shall be 0,1 SCFM.
The supplied air or nitrogen shall be clean and dry.

5.2.3 Adjusting of DENCO Constant Level Oiler

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

5.2.4 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 5.2.4 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 lev el in the r eserv oir. It will
decrease until the required oil level is reached
(middle of the sight glass). Ensure that enough oil
remains in the reservoir.

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

referring to section 5.2.4 Oil level.

5.2.5 Oil level

The correct oil level is in the middle of the oi l sight gla ss
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.

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

a) The oiler body is mounted so that the required oil

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

b) Additionally you can check the correct oiler

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

Use a spirit level to check the horizontal
alignment of the bearing housing.

A too high oil level will result in higher bearing

temperatures and therefore poorer lubrication.

5.2.6 Oil quality

Oil used for lubrication should only be of high quality.
The viscosity of the oil at working temperature must
be at least 10 cSt. The pouring point of the oil must
be in accordance with the lowest expected
temperature of the bearing housing during a stop of
the pump. For recommended lubricating oils refer to
the lubrication table.
Having selected the corresponding oil quality the
actual oil temperature at the bearing housing must be
checked after two service hours of the pump.
Considering this measured oil temperature the actual
viscosity must be determined by using the data sheet
of the oil, to verify the minimum required viscosity of
10 cSt. Do not forget, the oil temperature in the
bearing itself is about 10 °C (50 °F) higher than the oil
temperature at the bearing housing. On the following
table the oil viscosity is given at 40 °C (104 °F).
Determining the correct lubricating oil one must take
into consideration that all bearings will have higher
temperatures during the first 20 service hours. In
constant operation the bearing temperature will
decrease about 10 °C (50 °F). The oil temperature
shall be lower than 85 °C (185 °F) after this running-

Page 18 of 34

in time. The bearing outer race temperature should
not exceed 95°C (204°F). If the temperature is higher,
the reason may be a wrong oil quality, wrong oil level
or overload of the pump because of excessive wear.
If the humidity at the site is high, the roller bearings
become easily rusty during stand still periods. To
avoid that, we recommend to mix the lubricating oil
with a corrosion inhibitor contact your lubrication oil
supplier for proper additives inhibitors.

HWMA USER INSTRUCTIONS ENGLISH 11/10

Page 19 of 34

5.2.7 Lubrication Table

HWMA USER INSTRUCTIONS ENGLISH 11/10

Oil lubrication / Recommendation

Bearing temp.

Ambient temp.

Mobil

BP

+40 °C - +70 °C

(+104 °F - +158 °F)

-5 °C - +40 °C

(-23 °F - +104 °F)

MOBIL SHC 624(synthetic)
MOBIL DTE 24

Energol HLP-HM 32
Energol HLP-HM 46

32,4

31

32
46

1
1

1
1

+70 °C - +100 °C

(+158 °F - +212 °F)

-5 °C - +40 °C

(-23 °F - +104 °F)

+100 °C - +120 °C

(+212 °F - +248 °F)

-5 °C - +40 °C

(-23 °F - +104 °F)

Mobil DTE 27 951Mobil SHC 629 ( synthetic) 143

Energol HLP-HM 100 941

Shell Shell Turbo T 46 491Shell Turbo T 100 1001Shell Morlina 220 220

1

Esso

TERESSO 32
TERESSO 46

NUTO H 100

30

1

43

NUTO H 150

Castrol Hyspin AWS 32 321Alpha SP 100 100

1

100

SPARTAN EP 220 220

1

150

Alpha SP 220

1

Alphasyn T 150 ( synthetic)

OMV OMV turb HTU 46 461OMV gear HST 100 97,81OMV gear HST 220 226

Aral

Aral Degol BG 46
Aral Vitam GF 46

1

46

Aral Degol BG 100 100

1

46

1

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

Barrier/Buffer Fluid for
Mech. Seal

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

The sequence of the suppliers of the lubricants does not represent any indication of their superiority .
¹ Viscosity at 40 °C (104 °F) in cSt [mm²/s] DIN 51562

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

- Raffinated Hydraulic Oil

- Synthetic Oil

- Mixture of water / glykol
ATTENTION:

Do not use Methanol

appr. 10-15 cST at 40°C
(104 °F)

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

220
150

1

1

1

1
1

1

Page 20 of 34

5.3 Impeller clearance

Correct axial rotor setting is essential for trouble free
operation of the pump.

5.3.1 Adjusting of the rotor

a) Remove coupling spacer, coupling hub on pump

shaft and fan [8161] (when delivered).

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.

No requirements for softpacking,

c) Open screws from the clamping unit, located on

the end of the shaft sleeve (refer to shaft seal
drawing).

d) Loose and remove socket head cap screws

[6579.3] from the shaft nut [2910].

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

end of the shaft.

g) Now lift the rotor by turning the shaft nut in the

other direction till it is in the highest position.

For heavy pumps
(rotor weight > 150 kg (331 lb.)) we recommend
the following practice. The rotor is already in its
lowest position. Screw in an Eyebolt into the
thread at the top of the shaft. Use a lever or a
crane to lift the shaft (do it slowly, the axial
clearance is only a few millimetres).

h) Measure again the dimension from the shaft nut

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
nut.

The type of hydraulic is shown on the
nameplate (refer to section 3.2 Nomenclature)

j) Fix the shaft nut with the socket head cap

screws.

HWMA USER INSTRUCTIONS ENGLISH 11/10

5.4 Direction of rotation

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

The rotation of the driver shall be checked.

5.5 Guarding

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

5.6 Priming and auxiliary supplies

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

so no vent connections are provided.

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

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

5.7 Starting the pump

a) Start the driver according to the specification.

(Refer to driver IOM).

Pumps are usually started against

closed discharge valve.

b) Check the discharge and suction pressure gauge

to verify the pumps delivered head. Open the
discharge valve slowly, until the pump reaches the
specified operation point. The pump must operate
smoothly, and the vibration must be below 5 mm/s
(0.2 in./sec) (API 610 vibration limits).

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

Turn the shaftnut always in
downwards direction to meet the whole for the
socket head cap screw.

k) Fix the shaft sleeve with the clamping unit and

turn the tools out of the groove from the shaft
sleeve and fix them on the seal end plate.

l) Check if the shaft can be turned easy by hand
m) Mount fan (when delivered) coupling hub and

spacer again.

Page 21 of 34

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

Ensure that your driver is capable deliver

the higher torque required by starting against
open valve.

To prevent the pump from reverse rotation
after shut down, the installation of a check valve
is recommended.
Although the pump is not affected by reverse
rotation because of spezial couppling design , it
can be an issue with the driver.

HWMA USER INSTRUCTIONS ENGLISH 11/10

Check the discharge and suction pressure gauge
to verify the pumps delivered head.
The pump must operate smoothly, and the
vibration must be below 5 mm/s (0.2 in./sec) (API
610 vibration limits).
If a minimum flow valve is installed, take pressure

gauge readings to verify the correct operation.
c) Check the pipe system against any leakage.
d) Check the mechanical seal against any leakage.

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

5.8 Operation

a) Verify that the pump is operating within the

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

b) The bearing housing temperature shall not exceed

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

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

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

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

d) Observe the power consumption of the pump to

detect excessive wear.

5.9 Stopping and Shutdown

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

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

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

supplies at a time appropriate to the process.

d) For prolonged shut-downs and especially when

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

For automatic start/stop operation of the

pump, ensure that all steps described in chapter 5.6,

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

5.10 Hydraulic, mechanical and electrical
duty

This product has been supplied to meet the
performance specifications of your purchase order,
however it is understood that during the life of the
product these may change. The following notes will
help the user to decide how to evaluate the

implications of any change. If in doubt contact your
nearest Flowserve office.

5.10.1 Specific gravity (SG)

Pump capacity and total head in meters (feet) do not
change with SG, however pressure displayed on a
pressure gauge is directly proportional to SG. Power
absorbed is also directly proportional to SG.
It is therefore important to check that any change in
SG will not overload the pump driver or over­pressurize the pump.

5.10.2 Viscosity

For a given flow rate the total head reduces with
increased viscosity and increases with reduced
viscosity. Also for a given flow rate the power
absorbed increases with increased viscosity, and
reduces with reduced viscosity. It is important that
checks are made with your nearest Flowserve office if
changes in viscosity are planned.

5.10.3 Pump speed

Changing pump speed effects flow, total head, power
absorbed, NPSHR, noise and vibration. Flow varies
in direct proportion to pump speed. Head varies as
speed ratio squared. Power varies as speed ratio
cubed. If increasing speed it is important therefore to
ensure the maximum pump working pressure is not
exceeded, the driver is not overloaded,
NPSHA>NPSHR, and that noise and vibration are
within local requirements and regulations.

5.10.4 Net positive suction head (NPSH

NPSH available (NPSHA.) is a measure of the
energy available in the pumped liquid, above its
vapour pressure, at the pump suction branch.
NPSH required (NPSHR.) - is a measure of the
energy required in the pumped liquid, above its
vapour pressure, to prevent the pump from cavitating.
It is important that NPSHA >NPSHR. The margin
between NPSHA >NPSHR should be as large as
possible. If any change in NPSHA is proposed,
ensure these margins are not significantly eroded.
Refer to the pump performance curve to determine
exact requirements particularly if flow has changed. If
in doubt please consult your nearest Flowserve
for advise and details of the minimum allowable
margin for your application.

5.10.5 Pumped flow

Flow must not fall outside the minimum and
maximum continuous safe flow shown on the pump
performance curve and/or data sheet.

A)

office

Page 22 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

6.0 MAINTENANCE

6.1 General

It is the plant operator's responsibility to
ensure that all maintenance, inspection and assembly
work is carried out by authorized and qualified
personnel who have adequately familiarized
themselves with the subject matter by studying this
manual in detail.
(See also section 1.6.2.)

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

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

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

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

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

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

Do not spray air or compressed inert gas on skin.
Do not direct an air or gas jet towards other people.
Never use air or compressed inert gas to clean

clothes.
Before working on the pump, take measures to

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

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

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

6.2 Maintenance schedule

It is recommended that a maintenance plan
and schedule is adopted, in line with these User
Instructions, to include the following:

a) Any auxiliary systems installed must be monitored,

if necessary , to ensure they

b) Gland packings must be adjusted correctly to

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

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

correct functioning of the shaft seal must be
checked regularly.

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

show a lubricant change is required.

e) Check that the duty condition is in the safe

operating range for the pump.

f) Check vibration, noise level and surface

temperature at the bearings to confirm
satisfactory operation.

g) Check dirt and dust is removed from areas

around close clearances, bearing housings and
motors.

h) Check coupling alignment and re-align if

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

If any problems are found the following sequence of
actions should take place:
a) Refer to section 8, Faults; causes and remedies,

for fault diagnosis.
b) Ensure equipment complies with the

recommendations in this manual.
c) Contact Flowserve if the problem persists.

6.2.1 Routine Inspection (daily/weekly)

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

and bearing temperatures are normal.

b) Check that there are no abnormal fluid or

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

c) Check that shaft seal leaks are within acceptable

limits.

d) Check the level and condition of lubrication oil.

On grease lubricated pumps, check running

function correctly.

Page 23 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

hours since last recharge of grease or complete
grease change.

e) Check any auxiliary supplies eg. heating/cooling

(if fitted) are operating correctly.

f) Refer to the manuals of any associated

equipment if routine checks needed.

6.2.2 Periodic Inspection (every 6 Month)

a)

security of attachment and corrosion.

b) Check pump operation hours to determine if

bearing lubricant shall be changed.

c) The coupling should be checked for correct

alignment and worn driving elements.

Check foundation bolts for

 Refer to the manuals of any associated

equipment for periodic checks needed.

6.3 Spare parts

6.3.1 Ordering of spares

When ordering spare parts we need the following
information:

1. pump type and pump size

2. serial number of the pump

3. number of the required spare parts

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

Example: for HWMA pump:
HWMA, serial number G202222/01
1 piece impeller Pos. 2200

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

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

To ensure continuous satisfactory operation,
replacement parts to the original design specification
should be obtained from Flowserve.
Any change to the original design specification
(modification or use of a non-standard parts) will
invalidate the pump’s safety certification.

surfaces (if necessary) with preservative is
recommended at a 6 monthly interval.

6.3.2 Storage of spares

Spares should be stored in a clean dry area away from
vibration. Inspection and retreatment of metallic

Page 24 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

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+

Case 1
Head (case cover and stuffing box) 1
Diffuser 1
Motor 1
Shaft (w/key) 1 1 2 1
Impeller 1 1 2 3
Mechanical seal complete (Cartridge) 1 2 3 1 2 3 3
Shaft sleeve and stage bushing (set) 1 2 3 1 2 3 3
Gaskets, O-rings (set) 1 2 3 1 2 3 3

6.5 Fastener torques

Tightening torque MA Nm (lbf.ft)

Size of

screw

M 4 2 (1,5) 2,4 (1,8) 2,8 (2,1) 0,9 (0,7) 2 (1,5)
M 5 3,9 (2,9) 4,8 (3,6) 5,6 (4,1) 1,8 (1,4) 3,9 (2,9 )
M 6 6,8 (5) 8,3 (6,1) 9,7 (7,1) 3,2 (2,3) 6,8 (5)

M 8 16,2 (12) 19,8 (14,6) 23,1 (17) 7,6 (5,6) 16,2 (12)
M 10 31,9 (23,6) 39 (28,8) 45,4 (33,5) 14,9 (11) 31,9 (23,6)
M 12 55,4 (40,9) 67,8 (50) 78,8 (58,2) 25,9 (19,1) 55,4 (40,9)
M 14 87,9 (64,9) 107,5 (79,3) 125,1 (92,3) 41 (30,3) 87,9 (64,9)
M 16 134,6 (99,3) 164,5 (121,4) 191,4 (141,3) 62,8 (46,4) 134,6 (99,3)
M 18 188 (139) 230 (170) 267 (197) 88 (65) 188 (139)
M 20 263 (194) 321 (237) 373 (276) 123 (90) 263 (194)
M 22 353 (260) 431 (318) 502 (370) 165 (121) 196 (145)
M 24 453 (334) 553 (408) 644 (475) 211 (156) 251 (186)
M 27 654 (483) 799 (590) 930 (686) 305 (225) 363 (268)
M 30 892 (658) 1090 (805) 1269 (936) 416 (307) 496 (366)
M 33 1200 (886) 1467 (1082) 1707 (1260) 560 (413) 667 (492)
M 36 1550 (1144) 1895 (1398) 2205 (1627) 723 (534) 861 (636)
M 39 1988 (1467) 2430 (1793) 2827 (2086) 928 (685) 1104 (815)
M 42 2472 (1824) 3021 (2229) 3515 (2594) 1153 (851) 1373 (1013)
M 45 3061 (2259) 3741 (2761) 4354 (3213) 1429 (1054) 1701 (1255)

M48 3703 (2732) 4526 (3340) 5266 (3886) 1728 (1275) 2057 (1518)
M64 8862 (6539) 10831 (7993) 12604 (9301) 4136 (3052) 4923 (3633)

Duplex SS

(S32760, S31803,

1.4462)

Carbon Steel (NACE)

(A 193 Gr.B7M,
A 320 Gr. L7M)

Carbon Steel

(A 193 Gr. B7,

A 320 Gr. L7, 8.8)

Austenitic SS

(A 193Gr. B8MA)

(NACE)

Austenitic SS

(A 193 Gr. B8/B8M,

A4-70,A2-70)

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

Page 25 of 34

6.6 Setting impeller clearance

For axial rotor setting see section 5 Commissioning
startup, operation and shutdown.

6.7 Disassembly

Refer to section 1.6, Safety, before

dismantling the pump.

Before dismantling the pump for
overhaul, ensure genuine Flowserve replacement
parts are available.
Refer to sectional drawings for part numbers and
identification.

6.7.1 Dismantling of pump

1) Remove the coupling guards [7450] and secure the

mechanical seal by putting the setting plates into
the groove of the shaft sleeve. Loose the drive
collar to prepare further disassembly.

HWMA USER INSTRUCTIONS ENGLISH 11/10

6.7.4 Dismantling of the bearing housing

1) Loose the hexagon head bolt [6577.3] and pull off
the stuffing box housing [4110].

2) Pull off the deflector [2540] from the shaft after
loosing the grub screw [6814.2].

3) Unsecure shaft nut [2910] by loosing the cap
screw [6579.3].

4) Unscrew the shaft nut [2910], the hexagon head
bolt [6577.4] and remove the bearing cover
[1220] and [3260]. Take care about labyrinth ring
[4330].

5) Now you can pull out the shaft assembly from the
bearing housing. Pull off the bearing adaptor
sleeve [2471].

Take care of the key

[6700.3].

6) To pull off the angular contact bearings unsecure
lockwasher [6541.2] and loose bearing lock nut
[3712].

7) Pull off the distance sleeve [2460], the pumping
ring [4223] and the radial ball bearing [3011].

Refer to mechanical seal drawing for

details.

Drain the seal system, if

applicable.

2) Uncouple the motor from the pump and take off the
motor.

3) Loose the hexagon head bolt [6577.1] and pull off
the bearing lant er n [3 140] .

4) Loose the stud [6572.2] and pull out the pump
assembly from the casing. Eventually use hexagon
head bolt [6577.2] to support this.

6.7.2 Dismantling of hydraulic section

1) After loosing the socket screws [6579.4], remove
the insert.

2) Loose the impeller nut [2912] (right hand thread)

If the pump is equipped with an

inducer [2215] loose inducer.

3) Pull the impeller from the shaft. As the impeller is
fitted relatively strong on the shaft, use as support
the two threads on the shroud of the impeller .

4) After loosing the socket head cup screws [6579.1] ,
it is possible to remove the interst age plate [1471]
of the pump casing cover [1221].

6.7.3 Dismantling for changing the mechanical seal

1) Loose stud [6572.3] and pull off pump casing

cover [1221] including mechanical seal cartridge.

2) Loose hex nuts [6581.4] to remove mechanical

seal cartridge from pump casing cover [1221].

Take care of the key

[6700.2].

6.8 Examination of parts

1) Check whether any part of pump casing or impeller
was damaged by corrosion or erosion. Liquid
channels have to be clean and clear.

2) All liquid channels must be cleaned and free of rust
and mud on impeller! If machining of any impeller is
necessary it must be rebalanced dynamically after
this work. The balancing of the im pellers is Q 2,5
according ISO 1940.

3) Check the total run out of the shaft when mounted.
The maximum allowable value is 0,05 mm
measured on the fit of the impeller.

4) Especially by pumping aggressive media pay
attention to chemical corrosion on the surfaces of
shaft and sleeve which are touched by the liquid.
The shaft sleeves must have a clean and even
surface at the area of the rotating unit of the
mechanical seal, otherwise it will fail in operation.

5) Defective shafts and sleeves shall be replaced if a
machining is impossible (in accordance with
tolerances respectively with run-out of shaft).

6) Check the inner surface of the impeller hub, the
impeller must have a proper fit on the shaft! Any
loose impeller will cause vibrations and destroy
shaft and bearings. The fit between shaft and
impeller hub is Ø38 G5/ h5 ISO.

7) All defective seals respectively O-rings have to be
replaced.

8) At a complete overhaul of the pump all seals and
O-rings should be renewed depending on the
duration of service, all roller bearings should be
renewed, too.

Page 26 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

6.9 Assembly

To assemble the pump consult the sectional
drawings.

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

6.9.1 Assembly of the hydraulic cartridge

1) Mount the mechanical seal to the casing cover
[1221]. Tight hex nuts [6581.4] of studs
[06572.4].

Insert O-ring [4610.6] into

casing cover [1221].

2) Insert the O-ring [4610.2] into the interstage plate

[1471] and slip it on to the shaft. Tighten the
socket head cup screws [6579.1]

3) Put in the key [6700.1] and slip on the impeller

[2200]. Now put on the liner [1649] including the
O-ring [4610.10].

Tight the socket head cap

screws [6579.4] to fix the assembly.

4) Slip on the lockwasher [6541.1].Tight the

assembly with the impeller nut [2912] and secure
it with the lockwasher [6541.1].

If the pump is equipped with an

inducer [2215], it replaces the shaft nut.

5) Now the complete motor hydraulic assembly can

be put into the casing. Tight hex nuts [6581.2] of
the studs [6572.2].

6.9.2 Assembly of the bearing housing

1) Push radial ball bearing [3011] to the shaft

[2100].

Heat up the bearing with an

applicable device to 110°C.

2) Mount the pair of thrust ball bearing [3013] to the

bearing adaptor sleeve [2471] by turning the
bearing lock nut [3712].

Install the lockwasher

[6541.2].

3) Install the oil ring [3861] and secure it with the

grub screw [6814.3].

4) Put in key [6700.3] and slip the thrust bearing

assembly to the shaft [2100].

5) Put in the key [6700.2] and mount the pumping

ring [4223] at the line bearing side.

7) Mount the distance sleeve [2460] and the
deflector [2540]. Secure the deflector with the
grub screw [6814.2].

If grease catcher [3865] have been
disassembled, it must be installed before
mounting the deflector [2540]. Take care of the
O-ring [4610.7].

8) Put on the bearing cover [3260] and [1220] and
tight the hexagon head bolt [6577.4].

Take care of the O-rings

[4610.9] and the labyrinth ring [4330].

9) Install stuffing box housing [4110].

10) Mount shaft nut [2910] and set rotor clearance
according to chapter 5.3.1 Adjusting of the rotor.

6.9.3 Assembly of shaft seal

1) Replacing the mechanical seal extreme cleanness
is recommended. The sealing faces of the
mechanical seal must be free of scratches or other
damages and must be cleaned once again before
assembly.

2) Before sliding the rotating parts on the shaft
respectively on the shaft sleeve, the fits must be
sufficiently lubricated with a molykote paste.

Take care that the sealing faces

remain clean and no grease touches them.

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

4) At assembling the seal end plate [4212] pay
attention to the position of piping connections for
injection or quench (refer to shaft seal drawing).

5) For assembly of shaft seal use the reverse
procedure as described in the chapter
„Disassembly of shaft seal“ before. Important is
the fixing of the mechanical seal by the tools. So
a damage of the mechanical seal during further
assembling can be avoided.

Before start up the tools must
absolute turned out of the groove of the shaft
sleeve!

7.0 AUXILIARIES

7.1 Seal and seal systems

7.1.1 Dual Mechanical Seal unpressurized with
API–Plan 11+52

Take care of the O-ring

[4610.7].

6) Now you can push the shaft assembly into the
bearing housing [3200].

Page 27 of 34

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

HWMA USER INSTRUCTIONS ENGLISH 11/10

Try to turn the rotor by hand.If the
rotor cannot be turned readjust it following procedure
in section 5.3.1 Adjusting of the rotor.

The mechanical seal requires no adjustment
anymore. Check if the mounting plates are already
swung out.

Actions after start up:
Check all connections to the seal gland and the
mechanical seal itself against leakage. Check the
temperature of the seal gland. I slight increase of
temperature may be observed during the run in
period.

The faces of the inner mechanical seal are flushed by
the product (API Plan11). In Plan 11, product is
routed from the pump discharge via an orifice to the
seal chamber to provide cooling for the seal and to
vent air or vapors from the seal chamber. Fluid then
flows from the seal cavity back into the process
stream. Between the inner mechanical seal and the
outer (atmospheric) mechanical seal is a liquid buffer
fluid, which is unpressurized (API Plan 52). The
buffer fluid is contained in a seal pot (refer to drawing
of the seal pot), which is vented to a vent system,
thus maintaining the buffer fluid pressure close to
atmospheric.
Inner seal leakage will be product leakage into the
buffer fluid. There will always be some leakage
(max.5 ml/hour).
Plan 52 is used for flashing liquids, which have a
vapour pressure higher then the buffer fluid pressure.
So the product will flash in the seal pot and the
vapour can escape to the vent system.
All screw / flange connections have to be proofed.
Straight screw joints made of stainl ess steel h ave to be
tightened especially carefully.

Fill the seal system with a suitable
buffer fluid (refer to lubrication table).

Ensure that the valve GV for the
connection V is open (Barrier/buffer fluid vessel
drawing).

Open the Block & Bleed valve to
allow proper function of the PSH (set point 0.5 bar
(7.25 psi) above flare pressure).

recommend to have a spare cartridge seal on stock
for easy replacement.

7.1.2 Dual Mechanical Seal pressurized with
API–Plan 53a

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

Actions before first start up:
The pump will be delivered with correct vertical
adjustment of the rotor.

CAUTION

Try to turn the rotor by hand.If the
rotor cannot be turned readjust it following procedure
in section 5.3.1 Adjusting of the rotor.

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

Plan 53 pressurized dual seal systems are used in
services where no leakage to atmosphere can be
tolerated. A Plan 53a system consists of dual
mechanical seals with a liquid barrier fluid between
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.
Inner seal leakage will be barrier fluid leakage into
the product. There will always be some leakage
(max.5 ml/hour).
The leakage rate is monitored by monitoring the seal
pot level. The product must be able to accommodate
a small amount of contamination from the barrier
fluid. The seal pot pressure must be maintained at
the proper level. If the seal pot pressure drops, the
system will begin to operate like a Plan 52, or
unpressurized dual seal, which does not offer the
same level of sealing integrity. Specifically, the inner
seal leakage direction will be reversed and the barrier
fluid will, over time, become contaminated with the
process fluid with the problems that result, including
possible seal failure.

Open all necessary valves in the

cooling and auxiliary piping and check the flow.

Disassembly of the seal cartridge

CAUTION

barrier buffer fluid (refer to lubrication table).

CAUTION

cooling and auxiliary piping and check the flow.

Fill the seal system with a suitable

Open all necessary valves in the

is only allowed by authorized personal. Contact
Flowserve for any service of the mechanical seal. We

Page 28 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

CAUTION

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

Disassembly of the seal cartridge

7.2 Changing of mechanical seal

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

2) Secure the mechanical seal by putting the
mounting plates into the groove of the shaft
sleeve [2450]. Loose the grub screws [6814.4],
and disconnect the seal piping.

Drain the seal system, if

applicable.

3) For disassembly refer to section 6.7.1,
Dismantling of pump.

4) For assembly refer to section 6.9.1, Assembly of

pump

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

⇓

z

z z

z z

z
z
z

z z Foot valve too small. Investigate replacing the foot valve
z z Foot valve partially clogged. Clean foot valve
z z

⇓

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

z Pump not primed. Check complete filling

z z

Pump or suction pipe not completely filled with

liquid.

z

z z

z z z

z z
z
z

z z

z z z

Suction lift too high or level too low.

Excessive amount of air or gas in liquid. Check and purge from pipes

Air or vapour pocket in suction line. Check suction line design for pockets

Air leaks into suction line. Check airtight pipe then joints and gaskets
Air leaks into pump through mechanical seal,

sleeve joints, casing joint or pipe lugs.

Inlet of suction pipe insufficiently submerged. Check cut out system design
Total head of system higher than differential

head of pump.

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

losses at strainers / fittings

Check airtight assembly then joints and
gaskets

Check discharge head and head losses in
discharge pipe at the valve settings. Check

Page 29 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

FAULT SYMPTOM
Pump overheats and seizes

Bearings have short life

⇓

⇓

Pump vibrates or is noisy

⇓

⇓

Mechanical seal has short life

⇓

⇓

Mechanical seal leaks excessively

⇓

z Total head of system lower than pump design

z Specific gravity of liquid different from design. Consult Flowserve
z

z z

B. MECHANICAL TROUBLES

z z z z z z

z

z z z

z z z z z

z
z
z Leakage under sleeve due to joint failure. Replace joint and check for damage

z z z z z

z z z z z

z z z

⇓

Pump requires excessive power

⇓

⇓

Pump loses prime after starting

⇓

⇓

Insufficient pressure developed

⇓

⇓

Insufficient capacity delivered

⇓

⇓

Pump does not deliver liquid

⇓

⇓

PROBABLE CAUSES POSSIBLE REMEDIES

⇓

⇓

back pressure is not too high

head.

z z

Viscosity of liquid differs from that for which

designed.

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

z z

z

z z z z z

z Rotating part rubbing on stationary part

z z z

z z z

z z z
z z

z z

Excessive thrust caused by a mechanical

z z

Excessive grease in ball bearings. Check method of regreasing

z z

z z

z z

Damaged bearings due to contamination.

Shaft bent. Check shaft runouts within acceptable values

Bearings worn Replace bearings

z z
z z

Incorrect type of mechanical seal for operating

Impeller out of balance resulting in vibration. Check and consult Flowserve

Abrasive solids in liquid pumped. Check and consult Flowserve

Internal misalignment due to improper repairs

Operation at high capacity.

Misalignment due to pipe strain.

Improperly designed foundation.

internally.

Wearing ring surfaces worn. Replace worn wear ring/ surfaces
Impeller damaged or eroded. Replace impeller and check reason

Mechanical seal improperly installed.

conditions.
Shaft running off center because of worn

bearings or misalignment.

Mechanical seal was run dry.

causing impeller to rub.

failure inside the pump.

Lack of lubrication for bearings.

Improper installation of bearings

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

Consult Flowserve

Measure value and check maximum
permitted

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

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

Check for signs of this and consult Flowserve
if necessary

Check alignment of faces or damaged parts
and assembly method used

Consult Flowserve
Check misalignment and correct if necessary.

If alignment satisfactory check bearings for
excessive wear

Check mechanical seal condition and source
of dry running and repair

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

Check wear condition of Impeller, its
clearances and liquid passages

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

Check method of assembly, possible damage
or state of cleanliness during assembly and
type of bearing used

Check contamination source and replace

Page 30 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

FAULT SYMPTOM
Pump overheats and seizes

Bearings have short life

⇓

⇓

Pump vibrates or is noisy

⇓

⇓

Mechanical seal has short life

⇓

⇓

Mechanical seal leaks excessively

⇓

C. ELECTRICAL TROUBLES
z z

⇓

Pump requires excessive power

⇓

⇓

Pump loses prime after starting

⇓

⇓

Insufficient pressure developed

⇓

⇓

Insufficient capacity delivered

⇓

⇓

Pump does not deliver liquid

⇓

⇓

PROBABLE CAUSES POSSIBLE REMEDIES

⇓

⇓

damaged bearings

z z

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

z z

z Motor running too slow, Check motor terminal box connections

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-d river, 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.

10.3 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, 2
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.

nd

edition, Igor J. Karassik et al,

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.

Page 31 of 34

10.4 Abbreviations

Quantity ISO unit

ISO unit

abbreviation

HWMA USER INSTRUCTIONS ENGLISH 11/10

Multiplication

Factor

1

US unit

US unit

Abbreviation

Area

Capacity or
Flow rate

Force Newton N 0.2248 Pound force lbf

Head meter m 3.28084 feet ft

Heat Energy kilo joule kJ 0.9478

Length

Mass

Moment of
Inertia

Noise 4 decibel dBA

Power kilowatt kW 1.34102 horsepower hp

Pressure 2 bar bar 14.5 pounds/in.² psi

Rotational
Speed

Stress

Temperature

square meter

square centimeter

Cubic

meter/hour

meter

millimeter

micrometer

kilogram

gram

kilogram

square meter

revs per minute r/min

Newton/square

millimetre

degrees

Celsius

m²

cm²

m³/h 4.4033

m

mm

µm

kg

g

kg.m² 23.73

N/mm² 145.0 pounds/in.² psi

°C (1.8 x °C) + 32

10.764

0.155

3.28084

0.03937

0.00003937

2.20462

0.035274

square feet
square inch

US Gallons/

minute

British

thermal unit

feet
inch
inch

pounds
ounces

pounds

square feet

degrees

Fahrenheit

ft²

in.²

US gpm

Btu

ft
in.
in.

lb.

oz.

lb.ft²

°F

Torque Newton meter Nm 0.7376 pound.feet lbf.ft

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

Vibration 3

Velocity

Viscosity

Volume

1

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

2

where pressure is not stated to be absolute it is gauge

3

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

4

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

millimetre/

second

meter/second

millimeter/second

square millimetre/

second or centiStoke

cubic meter

liter

mm/s

m/s

mm/s

cSt

m³

l

0.03937

3.28084

0.03937

264.2

33.81

inches/
second

feet/second

inches/second

US Gallons

fluid ounce

in./sec

ft/sec

in./sec

US gal.

Fl.oz.

applicable

Page 32 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

AFTERMARKET DIRECTORY

Flowserve (Austria) GmbH

Industriestraße B/6 Fax: +43 / 2236 / 31940
A-2345 Brunn/Geb., AUSTRIA Mail: [e-mail]

IF YOU NEED ANY INFORMATIONS ON PRICES, QUOTATIONS FOR PARTS, FIELD

SERVICE, REPAIRS... PLEASE CONTACT DIRECTLY OUR SPECIALISTS BY DIALING

OUR PHONE NUMBER AND HIS EXTENSION

MANAGER
PARTS QUOTATIONS
PARTS ORDER HANDLING
FIELD SERVICE / REPAIRS
SECRETARY
EXPORT / INVOICING

MESSAGES CAN BE LEFT ALSO ON OUR ANSWERING MACHINE

IMPORTANT NOTES:

OUR ADDRESS

Tel: +43 / 2236 / 31530

EXT. 297
EXT. 236
EXT. 237
EXT. 205
EXT. 232
EXT. 238

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:

- STARTUP AND COMMISSION SERVICE DIAL: EXT 205

-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: ………………………………………

Customer Service Fax: [phone]

Page 33 of 34

HWMA USER INSTRUCTIONS ENGLISH 11/10

Your Flowserve factory contacts:

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

Telefon: [phone]
Fax: [phone]
Service & Repair Fax: [phone]
E.mail: [e-mail]

FLOWSERVE REGIONAL
SALES OFFICES:

USA and Canada

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

Europe, Middle East, Africa

Worthing S.P.A.
Flowserve Corporation
Via Rossini 90/92
20033 Desio (Milan) Italy
Telephone [phone]
Fax [phone]

Latin America and Caribbean

Flowserve Corporation
6840 Wynnwood Lane
Houston, Texas 77008 USA
Telephone [phone]
Fax [phone]

Asia Pacific

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

Page 34 of 34