Flowserve L Worthington Simpson User Manual

USER INSTRUCTIONS

WORTHINGTON SIMPSON® L and U

Installation

Operation

Horizontal, split case, volute type centrifugal pumps for
water and general service

PCN=85392721 07-12 (Based on C953KH025)

Maintenance

These instructions must be read prior to installing,

operating, using and maintaining this equipment.

L and U USER INSTRUCTIONS ENGLISH 85392721 07-12

CONTENTS

PAGE

1. INTRODUCTION AND SAFETY ........................ 4

1.1 General ........................................................... 4

1.2 CE marking and approvals ............................. 4

1.3 Disclaimer ....................................................... 4

1.4 Copyright ......................................................... 4

1.5 Duty conditions ............................................... 4

1.6 Safety .............................................................. 5

1.7 Nameplate and safety labels .......................... 8

1.8 Specific machine performance ....................... 8

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

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

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

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

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

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

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

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

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

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

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

3.4 Performance and operating limits ................. 12

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

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

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

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

4.4 Grouting ........................................................ 13

4.5 Initial alignment ............................................. 13

4.6 Piping ............................................................ 14

4.7 Final shaft alignment check .......................... 16

4.8 Electrical connections ................................... 16

4.9 Protection systems ........................................ 17

6 MAINTENANCE ............................................... 21

6.1 General ......................................................... 22

6.2 Maintenance schedule.................................. 22

6.3 Spare parts ................................................... 24

6.4 Recommended spares and consumable items
24

6.5 Tools required ............................................... 25

6.6 Fastener torques .......................................... 25

6.7 Renewal clearances ..................................... 25

6.8 Disassembly ................................................. 25

6.9 Examination of parts ..................................... 26

6.10 Assembly ...................................................... 26

7 FAULTS; CAUSES AND REMEDIES ............... 28

8 PARTS LISTS AND DRAWINGS ...................... 30

8.1 Sectional drawing – L, double entry impeller,

grease lubricated, gland packed .................. 30

8.2 Sectional drawing – U Pump horizontal,

grease lubricated, cartridge seal .................. 31

8.3 Sectional drawing – U Pump vertival, grease

lubricated, cartridge seal .............................. 32

8.4 General arrangement drawing ...................... 33

9 CERTIFICATION .............................................. 33

10 OTHER RELEVANT DOCUMENTATION AND

MANUALS ........................................................ 33

10.1 Supplementary User Instructions ................. 33

10.2 Change notes ............................................... 33

10.3 Additional sources of information ................. 33

PAGE

5 COMMISSIONING, STARTUP, OPERATION

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

5.1 Pre-commissioning procedure ...................... 17

5.2 Pump lubricants ............................................ 18

5.3 Direction of rotation ....................................... 18

5.4 Guarding ....................................................... 19

5.5 Priming and auxiliary supplies ...................... 19

5.6 Starting the pump .......................................... 19

5.7 Running the pump ......................................... 19

5.8 Stopping and shutdown ................................ 21

5.9 Hydraulic, mechanical and electrical duty .... 21

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L and U USER INSTRUCTIONS ENGLISH 85392721 07-12

INDEX

PAGE

Additional sources (10.3) ......................................... 33

Alignment of shafting (4.5) ....................................... 13

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

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

Certification (9) ........................................................ 33

Clearances (6.7, Renewal clearances).................... 25

Commissioning and operation (5) ............................ 17

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

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

Consumable items (6.4) .......................................... 24

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

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

Direction of rotation (5.3) ......................................... 18

Disassembly (6.8) .................................................... 25

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

Dismantling (6.8, Disassembly) ............................... 25

Drawings (8) ............................................................ 30

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

Electrical connections (4.8) ..................................... 16

End of product life (2.5) ........................................... 10

Examination of parts (6.9) ....................................... 26

Fastener torques (6.6) ............................................. 25

Faults; causes and remedies (7) ............................. 28

Forces and moments (4.6.2) ................................... 14

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

General arrangement drawing (8.4) ........................ 33

General assembly drawings (8) ............................... 30

Grouting (4.4) ........................................................... 13

Guarding (5.4) .......................................................... 19

Handling (2.2) .......................................................... 10

Hydraulic; mechanical and electrical duty (5.9) ....... 21

Inspection (6.2.1 and 6.2.2) ..................................... 23

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

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

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

Lubrication (5.1.1) .................................................... 17

Maintenance (6) ....................................................... 21

Maintenance schedule (6.2) .................................... 22

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

Nameplate (1.7.1) ...................................................... 8

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

Ordering spare parts (6.3.1) .................................... 24

Parts lists (8) ............................................................ 30

Performance (3.4) .................................................... 12

Piping (4.6) .............................................................. 14

PAGE

Priming and auxiliary supplies (5.5) .........................19

Protection systems (4.9) ..........................................17

Reassembly (6.10 Assembly) ..................................26

Receipt and unpacking (2.1) ....................................10

Recommended grease lubricants (5.2.2) .................18

Recommended oil lubricants (5.2.1) ........................18

Recommended spares (6.4) .....................................24

Re-lubrication (6.2.3) ................................................23

Renewal clearances (6.7) ........................................25

Replacement parts (6.3 and 6.4) ..............................24

Running the pump (5.7) ...........................................19

Safety (1.6) ................................................................. 5

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

Safety labels (1.7.2) ................................................... 8

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

Safety, protection systems (4.9) ...............................17

Sectional drawings (8) ..............................................30

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

Sources, additional information (10.3) .....................33

Spare parts (6.3) ......................................................24

Specific machine performance (1.8) .......................... 8

Starting the pump (5.6).............................................19

Start/stop frequency (5.7.6) ......................................21

Stopping and shutdown (5.8) ...................................21

Storage, pump (2.4) .................................................10

Storage, spare parts (6.3.2) .....................................24

Supplementary manuals or info sources (10) ..........33

Supplementary User Instructions (10.1)...................33

Tools required (6.5) ..................................................25

Torques for fasteners (6.6) .......................................25

Trouble-shooting (see 7) ..........................................28

Vibration (5.7.5) ........................................................20

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L and U USER INSTRUCTIONS ENGLISH 85392721 07-12

1. INTRODUCTION AND SAFETY

1.1 General

These Instructions must always be kept

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

Flowserve products are designed, developed and
manufactured with state-of-the-art technologies in
modern facilities. The unit is produced with great
care and commitment to continuous quality control,
utilising sophisticated quality techniques, and safety
requirements.

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

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

These instructions must be read prior to

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

1.2 CE marking and approvals

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

Where applicable, the Directives and any additional
Approvals, cover important safety aspects relating to
machinery and equipment and the satisfactory provision

of technical documents and safety instructions. Where
applicable this document incorporates information
relevant to these Directives and Approvals. To confirm
the Approvals applying and if the product is CE marked,
check the serial number plate markings and the
Certification. (See section 9, Certification.)

1.3 Disclaimer

Information in these User Instructions is believed
to be complete and reliable. However, in spite of
all of the efforts of Flowserve Corporation to
provide comprehensive instructions, good
engineering and safety practice should always be
used.

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

1.4 Copyright

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

1.5 Duty conditions

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

The product must not be operated beyond

the parameters specified for the application. If
there is any doubt as to the suitability of the
product for the application intended, contact
Flowserve for advice, quoting the serial number.

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

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1.6 Safety

1.6.1 Summary of safety markings

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

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

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

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

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

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

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

This sign is not a safety symbol but indicates

an important instruction in the assembly process.

1.6.2 Personnel qualification and training

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

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

1.6.3 Safety action

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

NEVER DO MAINTENANCE WORK

WHEN THE UNIT IS CONNECTED TO POWER

GUARDS MUST NOT BE REMOVED WHILE

THE PUMP IS OPERATIONAL

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

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

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

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

APPLYING HEAT TO REMOVE IMPELLER
There may be occasions when the impeller has either
been shrunk fit on to the pump shaft or has become
difficult to remove due to products of corrosion.

If you elect to use heat to remove the impeller, it must
be applied quickly to the impeller boss. TAKE
GREAT CARE!

Before applying heat ensure any residual hazardous
liquid trapped between the impeller and pump shaft is
thoroughly drained out through the impeller keyway to
prevent an explosion or emission of toxic vapour.
This must be carried out with the shaft in the vertical
position. On some pump sizes a cavity exists in the
impeller bore so on occasions a significant volume of
liquid may drain out.

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

If the temperature is greater than 80 °C (175 °F) o r
below -5 °C (23 °F) in a restricted zone, or exceed
local regulations, action as above shall be taken.

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

Gland packing must not be used when pumping
hazardous liquids.

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

ENSURE CORRECT LUBRICATION
(See section 5, Commissioning, start-up, operation
and shutdown.)

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

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 pump and mechanical seal.

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

1.6.4 Products used in potentially explosive

atmospheres

Measures are required to:

• Avoid excessive surface temperature

• Prevent build up of explosive mixtures

• Prevent the generation of sparks

• Prevent leakages

• Maintain the pump to avoid hazard

The following instructions for pumps and pump units
when installed in potentially explosive atmospheres
must be followed to help ensure explosion protection.
For ATEX, both electrical and non-electrical
equipment must meet the requirements of 94/9/EC.
Always observe the regional legal Ex requirements
eg Ex electrical items outside the EU may be required
certified to other than ATEX eg IECEx, UL.

1.6.4.1 Scope of compliance

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

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

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

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s

1.6.4.2 Marking

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

II 2 GD c IIC 135 ºC (T4)

Equipment Group
I = Mining
II = Non-mining

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

Gas and/or dust
G = Gas
D = Dust

c = Constructional safety

(in accordance with EN13463-5)

Gas Group
IIA – Propane (typical)
IIB – Ethylene (typical)
IIC – Hydrogen (typical)

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

1.6.4.3 Avoiding excessive surface temperature

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 ºC (104 ºF); 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 ATEX temperature class and must not exceed the
values in the table that follows.

Temperature clas

to EN13463-1

T6
T5
T4
T3
T2
T1

* The table only takes the ATEX temperature class into consideration. Pump

design or material, as well as component design or material, may further
limit the maximum working temperature of the liquid.

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

65 °C (149 °F) *

80 °C (176 °F) *
115 °C (239 °F) *
180 °C (356 °F) *
275 °C (527 °F) *
400 °C (752 °F) *

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

The operator is responsible to ensure that the
specified maximum liquid temperature is not
exceeded.

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.

Avoid mechanical, hydraulic or electrical overload by
using motor overload trips, temperature monitors or a
power monitor and make routine vibration monitoring
checks.

In dirty or dusty environments make regular checks
and remove dirt from areas around close clearances,
bearing housings and motors.

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

If an explosive atmosphere exists during the
installation, do not attempt to check the direction of
rotation by starting the pump unfilled. Even a short
run time may give a high temperature resulting from
contact between rotating and stationary components.

1.6.4.4 Preventing the build up of explosive
mixtures

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, fit an appropriate dry run protection device
is (for example liquid detection or a power monitor).

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

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L and U USER INSTRUCTIONS ENGLISH 85392721 07-12

1.6.4.5 Preventing sparks

To prevent a potential hazard from mechanical

contact, the coupling guard must be non-sparking.
To avoid the potential hazard from random induced

current generating a spark, the baseplate must be
properly grounded.

Avoid electrostatic charge: do not rub non-metallic

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

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

Additional requirement for metallic pumps on
non-metallic baseplates

When metallic components are fitted on a non­metallic baseplate they must be individually earthed.

1.6.4.6 Preventing leakage

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

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

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

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

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

1.6.4.7 Maintenance to avoid the hazard

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

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

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

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

1.7 Nameplate and safety labels

1.7.1 Nameplate

For details of nameplate, see the Declaration of
Conformity, or separate documentation included with

these User Instructions.

1.7.2 Safety labels

Oil lubricated units only:

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.

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1 1 85

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 17 dBA to the sound pressure value.

Motor size
and speed

kW (hp)

<0.55(<0.75) 72 72 64 65 62 64 62 64

0.75 (1) 72 72 64 66 62 64 62 64

1.1 (1.5) 74 74 66 67 64 64 62 63

1.5 (2) 74 74 66 71 64 64 62 63

2.2 (3) 75 76 68 72 65 66 63 64
3 (4) 75 76 70 73 65 66 63 64
4 (5) 75 76 71 73 65 66 63 64

5.5 (7.5) 76 77 72 75 66 67 64 65

7.5 (10) 76 77 72 75 66 67 64 65
11(15) 80 81 76 78 70 71 68 69

15 (20) 80 81 76 78 70 71 68 69

18.5 (25) 81 81 77 78 71 71 69 71
22 (30) 81 81 77 79 71 71 69 71
30 (40) 83 83 79 81 73 73 71 73
37 (50) 83 83 79 81 73 73 71 73
45 (60) 86 86 82 84 76 76 74 76
55 (75) 86 86 82 84 76 76 74 76

75 (100) 87 87 83 85 77 77 75 77
90 (120) 87 88 83 85 77 78 75 78

110 (150) 89 90 85 87 79 80 77 80
150 (200) 89 90 85 87 79 80 77 80
200 (270)
300 (400) 87

1

The noise level of machines in this range will most likely be of values which require noise exposure control, but typical values are inappropriate.

Note: for 1 180 and 960 r/min reduce 1 450 r/min values by 2 dBA. For 880 and 720 r/min reduce 1 450 r/min values by 3 dBA.

3 550 r/min 2 900 r/min 1 750 r/min 1 450 r/min

Pump

only

1 1

Pump and

Typical sound pressure level LpA at 1 m reference 20 µPa, dBA

motor

Pump

only

Pump and

motor

Pump

only

Pump and

motor

87 83
90 85

Pump

only

Pump and

motor

85
86

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2 TRANSPORT AND STORAGE

2.1 Consignment receipt and unpacking

Immediately after receipt of the equipment it must be
checked against the delivery and 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. Later
claims cannot be accepted.

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

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

2.2 Handling

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

2.3 Lifting

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

To avoid distortion, the pump unit

should be lifted as shown:

Do not use the driver, bare-shaft
pump or component lifting points to lift the complete
machine. Before lifting the driver alone, refer to the
manufacturer’s instructions.

2.4 Storage

Store the pump in a clean, dry location
away from vibration. Leave piping connection covers in
place to keep dirt and other foreign material out of pump
casing. Turn pump at intervals to prevent brinelling of
the bearings and the seal faces, if fitted, from sticking.

The pump may be stored as above for up to 6 months.
Consult Flowserve for preservative actions when a
longer storage period is needed.

2.5 Recycling and end of product life

At the end of the service life of the product or its
parts, the relevant materials and parts should be
recycled or disposed of using an environmentally
acceptable method and local regulations. If the
product contains substances that are harmful to the
environment, these should be removed and disposed
of in accordance with current regulations. This also
includes the liquids and or gases that may be used in
the "seal system" or other utilities.

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

Page 10 of 36 flowserve.com

L and U USER INSTRUCTIONS ENGLISH 85392721 07-12

3 PUMP DESCRIPTION

3.1 Configurations

The L and U range of pumps are horizontal split casing
volute type centrifugal pumps designed for water works,
drainage, general service and circulating applications.
They can be used with motor, steam turbine and
gasoline or diesel engine drives.

The range can have the following configurations:

L single-stage horizontal suction and discharge nozzles.
U two-stage horizontal suction and discharge nozzles.

LV single-stage horizontal suction/discharge, vertical shaft.
UV two-stage horizontal suction/discharge, vertical shaft.

3.2 Name nomenclature

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

6 L-13

Nominal discharge branch size (inch)
Configuration – see 3.1 above
Nominal maximum impeller diameter (inch)
The typical nomenclature above is the general guide

to the configuration description. Identify the actual
pump size and serial number from the pump
nameplate. Check that this agrees with the
applicable certification provided.

3.3 Design of major parts

3.3.1 Pump casing

The pump has its main casing gasket axial to the
shaft allowing maintenance to the rotating element by
removing the top half casing. Suction and discharge
branches are in the bottom half and therefore remain
undisturbed.

3.3.2 Impeller

The impeller is fully shrouded and may be fitted with
optional hub rings.

3.3.3 Shaft

The large diameter stiff shaft, mounted on bearings,
has a keyed drive end.

3.3.4 Pump bearings and lubrication

Ball bearings are fitted and are grease lubricated as
standard. There is an option of oil lubrication when
the pump is intended for horizontal mounting.

Bearing isolators or stationary labyrinths may be fitted
as an option in the bearing covers to protect the
bearings.

Vertically built pumps have as standard has a liquid
lubricated journal bearing fitted at the non-drive end.
This bearing is lubricated by pumped product or from
an external clean source.

3.3.5 Bearing housing

Two grease nipples enable grease lubricated bearings
to be replenished between major service intervals.

3.3.6 Seal housing

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

3.3.7 Shaft seal

The mechanical seal(s), attached to the pump shaft, seals
the pumped liquid from the environment. Gland packing
may be fitted as an option on the L and U.

3.3.8 Driver

The driver is normally an electric motor. Different drive
configurations may be fitted such as internal combustion
engines, turbines, hydraulic motors etc driving via
couplings, belts, gearboxes, drive shafts etc.

3.3.9 Accessories

Accessories may be fitted when specified by the
customer.

Page 11 of 36 flowserve.com