Flowserve LN User Manual

USER INSTRUCTIONS

LN, LNE, LNH, LNV, LNEV, LNC and
LNEC centrifugal pumps

Single stage, double suction, horizontally split, volute type
centrifugal pumps

PCN=71576423 11-09 (E) (Based on C953KH037)
Original instructions.

Installation

Operation

Maintenance

These instructions must be read prior to installing,

operating, using and maintaining this equipment.

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

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

3.2 Performance and operating limits................. 11

4 INSTALLATION.................................................... 11

4.1 Location......................................................... 11

4.2 Foundation .................................................... 11

4.3 Grouting ........................................................ 12

4.4 Initial alignment .............................................12

4.5 Piping ............................................................13

4.6 Final shaft alignment check ..........................14

4.7 Electrical connections ................................... 14

4.8 Protection systems........................................14

6 MAINTENANCE ...................................................19

6.1 General..........................................................19

6.2 Maintenance schedule...................................19

6.3 Spare parts.....................................................20

6.4 Recommended spares and consumable items

7 FAULTS; CAUSES AND REMEDIES...................24

8 PARTS LISTS AND DRAWINGS .........................26

9 CERTIFICATION..................................................30

10 OTHER RELEVANT DOCUMENTATION AND

.......................................................................21

6.5 Disassembly ..................................................21

6.6 Examination of parts......................................22

6.7 Assembly .......................................................22

8.1 Sectional drawing ...........................................26

8.2 Sectional drawing parts list.............................29

8.3 General arrangement drawing........................29

MANUALS.....................................................30

10.1 Supplementary User Instructions .................30

10.2 Change notes ...............................................30

10.3 Additional sources of information..................30

Page

5 COMMISSIONING, START-UP, OPERATION AND

SHUTDOWN.................................................15

5.1 Pre-commissioning procedure......................15

5.2 Pump lubricants ............................................ 15

5.3 Direction of rotation.......................................16

5.4 Guarding ........................................................ 16

5.5 Priming and auxiliary supplies ......................16

5.6 Starting the pump..........................................17

5.7 Running the pump.........................................17

5.8 Stopping and shutdown.................................18

5.9 Hydraulic, mechanical and electrical duty.....18

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

INDEX

Page

Additional sources (10.3).........................................30

Alignment of shafting (see 4.2, 4.4 and 4.6)

Assembly (6.7).........................................................22

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

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

Certification (9) ........................................................30

Change notes (10.2)................................................30

Commissioning and operation (5)............................ 15

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

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

Direction of rotation (5.3) .........................................16

Disassembly (6.5)....................................................21

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

Dismantling (see 6.5, Disassembly)........................21

Drawings (8) ............................................................26

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

Electrical connections (4.7) .....................................14

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

Examination of parts (6.6) .......................................22

Faults; causes and remedies (7).............................24

Foundation (4.2) ...................................................... 11

General arrangement drawing (8.3) ........................ 29

Grouting (4.3)........................................................... 12

Guarding (5.4).......................................................... 16

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

Hydraulic, mechanical and electrical duty (5.9).......18

Inspection (6.2.1 and 6.2.2).....................................20

Installation (4) ..........................................................11

Internal coating (6.2.5).............................................20

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

Location (4.1)...........................................................11

Lubrication (see 5.1.1 and 5.2)

Lubrication schedule (5.2.3)....................................16

Maintenance (6).......................................................19

Maintenance schedule (6.2)....................................19

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

Operating limits (3.2) ............................................... 11

Ordering spare parts (6.3.1)....................................20

Parts lists (8.2).........................................................29

Performance (3.2)....................................................11

Piping (4.5) ..............................................................13

Pre-commissioning (5.1).......................................... 15

Protection systems (4.8)..........................................14

Reassembly (see 6.7, Assembly)............................22

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

Recommended grease lubricants (5.2.2) ................ 16

Recommended oil lubricants (5.2.1)........................15

Recommended spares (6.4)....................................21

Recycling (2.5).........................................................10

Page

Replacement parts (see 6.3 and 6.4).......................20

Running the pump (5.7) ...........................................17

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

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

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

Safety, protection systems (see 1.6 and 4.8)

Sectional drawings (8.1)...........................................26

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

Sources, additional information (10.3) .....................30

Spare parts (6.3) ......................................................20

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

Starting the pump (5.6).............................................17

Stop/start frequency (5.7.6)......................................18

Stopping and shutdown (5.8)...................................18

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

Storage, spare parts (6.3.2) .....................................21

Supplementary manuals or information sources (10)

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

Thermal expansion (4.4.1) .......................................12

Trouble-shooting (see 7) ..........................................24

Vibration (5.7.5)........................................................18

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

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’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 and regulations.

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 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 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 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 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
the written agreement of Flowserve before start up.

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

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.

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

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 68 °C (155 °F) o r
below -5 °C (23 °F) in a restricted zone, or
exceeds local regulations, action as above shall
be taken.

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

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.

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.

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

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 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.

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 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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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

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 (Equipment Category 2 only)
IIA – Propane (typical)
IIB – Ethylene (typical)
IIC – Hydrogen (typical)

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

1.6.4.3 Avoiding excessive surface temperatures

ENSURE THE EQUIPMENT TEMPERATURE

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

ATEX Ex rating on the nameplate. These are based
on 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.

Temperature

class to

EN13463-1

T6
T5
T4
T3
T2
T1

Maximum

surface

temperature

permitted

85 °C (185 °F)
100 °C (212 °F)
135 °C (275 °F)
200 °C (392 °F)
300 °C (572 °F)
450 °C (842 °F)

Temperature limit of liquid

handled (* depending on

material and construction

variant - check which is lower)

Consult Flowserve
Consult Flowserve

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

The 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 the pump could be
installed in different hazardous atmospheres. In this
case the user is responsible for ensuring that the
pump surface temperature does not exceed that
permitted in the particular hazardous atmosphere.

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.

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, temperature monitor or a
power monitor and make routine vibration monitoring
checks.

In dirty or dusty environments, regular checks must
be made and dirt removed from areas around close
clearances, bearing housings and motors.

1.6.4.4 Preventing the build up of explosive
mixtures

ENSURE THE PUMP IS PROPERLY FILLED

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

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

If the operation of the system cannot avoid this
condition the fitting of an appropriate dry run
protection device is recommended (eg liquid
detection or a power monitor).

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

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

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 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.

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, the installation of a liquid detection device is
recommended.

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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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

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

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 1pW) then
add 17 dBA to the sound pressure value.

motor” noise is that typically expected from standard

Motor size
and speed

kW (hp)

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
500 (670) 88

1 000 (1 300) 90
1 500 (2 000)

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

1

Pump and

motor

1

Pump

only

85

Pump and

90

–

motor

87 83
90 85

1

1

1

Pump

only

86
88
90

Pump and

motor

85
86

1

1

1

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

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 crate, 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

2.3.1 Slinging of motor pumps units

Use handling means in accordance with motor
pump unit mass mentioned on the CE plate. For the
masses of the pumps bare end of shaft see table §

2.2.2 and nameplate.

To avoid distortion, the pump unit

should be lifted as shown.

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

The driver weight is recorded on its nameplate or
mass plate.

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.

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3 PUMP DESCRIPTION

3.1 Design of major parts

3.1.1 General

This pump has the casing joint axial to the shaft
allowing maintenance to the rotating element by
removing the top half casing.

3.1.2 Pump casing

The axially split casing has branches in the lower half
enabling access to rotating element by removing top
half casing.

3.1.3 Impeller

A shrouded impeller with hub rings is fitted.

3.1.4 Shaft

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

3.1.5 Bearing housing
Two grease nipples enable grease lubricated
bearings to be replenished between major service
intervals. For oil lubricated bearings, a constant level
oiler is fitted.

3.1.6 Pump bearings and lubrication

The bearings may be oil or grease lubricated.

3.1.7 Seal housing

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

3.1.8 Shaft seal

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

3.1.9 Driver

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

3.1.10 Accessories

Accessories may be fitted when specified by the
customer.

3.2 Performance and operating limits

This product has been selected to meet the
specifications of your purchase order. See section 1.5.

The following data is included as additional information to
help with your installation. It is typical, and factors such
as temperature, materials, and seal type may influence
this data. If required, a definitive statement for your
particular application can be obtained from Flowserve.

3.4.1 Operating limits

Pumped liquid temperature limits*
Maximum ambient temperature*
Maximum soft solids in suspension*

Maximum pump speed

* Subject to written agreement from Flowserve.

- 20 to + 80 ºC
(- 4 to + 176 ºF)

- 20 to + 40 ºC
(- 4 to +104 ºF)
up to 3 % by volume
(refer for size limits)
refer to the nameplate

4 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.

All equipment must be grounded.

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 Foundation

There are many methods of installing
pump units to their foundations. The correct method
depends on the size of the pump unit, its location and
noise vibration limitations. Non-compliance with the
provision of correct foundation and installation may
lead to failure of the pump and, as such, would be
outside the terms of the warranty.

Ensure the following are met:
a) The baseplate should be mounted onto a firm

foundation, either an appropriate thickness of
quality concrete or sturdy steel framework. (It
should NOT be distorted or pulled down onto the
surface of the foundation, but should be
supported to maintain the original alignment.)

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

b) Install the baseplate onto packing pieces evenly

spaced and adjacent to foundation bolts.

c) Level with shims between baseplate and packing

pieces.

d) The pump and driver have been aligned before

dispatch however the alignment of pump and motor
half coupling must be checked. If this is incorrect, it
indicates that the baseplate has become twisted
and should be corrected by re-shimming.

e) If the pump is driven from a separate motor using

a vertical cardan shaft it is recommended that
there is 3/4 of a degree angular misalignment
between the drive and driven shafts and that any
supports for the drive shaft plummer blocks are
rigid and do not exhibit resonant frequencies.

f) If not supplied, guarding shall be fitted as

necessary to meet the requirements of EN292.

4.3 Grouting

Where applicable, grout in the foundation bolts.
After adding pipe work connections and rechecking the

coupling alignment, the baseplate should then be
grouted in accordance with good engineering practice.
Fabricated steel, cast iron and epoxy baseplates can be
filled with grout. Folded steel baseplates should be
grouted to locate their packing pieces. If in any doubt,
please contact your nearest service centre for advice.
Grouting provides solid contact between the pump
unit and foundation, prevents lateral movement of
running equipment and dampens resonant vibrations.

Foundation bolts should only be fully tightened when
the grout has cured.

4.4 Initial alignment

Before connecting the couplings verify

the motor rotation direction.

4.4.1 Thermal expansion

The pump and motor will normally
have to be aligned at ambient temperature and
should be corrected to allow for thermal expansion at
operating temperature. In pump installations
involving high liquid temperatures, the unit should be
run at the actual operating temperature, shut down
and the alignment checked immediately.

4.4.2 Alignment methods

Ensure pump and driver are isolated
electrically and the half couplings are disconnected.
Ensure that the pump pipework, suction and
discharge, is disconnected.

The alignment MUST be checked.

Although the pump will have been aligned at the
factory it is most likely that this alignment will have
been disturbed during transportation or handling. If
necessary, align the motor to the pump, not the pump
to the motor.

Alignment is achieved by adding or removing shims
under the motor feet and also moving the motor
horizontally as required. In some cases where the
alignment cannot be achieved it will be necessary to
move the pump before recommencing the above
procedure.

For couplings with narrow flanges, use a dial indicator
gauge as shown. The alignment values are
maximums for continuous service.

0 - 0.2 m m

0 - 0.1 m m

Permissible misalignment limits at working
temperature:

• Parallel alignment within 0.2mm TIR

• Angular alignment within 0.1mm

Pumps with thick flanged non-spacer couplings can
be aligned by using a straight-edge across the
outside diameters of the coupling hubs and
measuring the gap between the machined faces
using feeler gauges, measuring wedge or callipers.

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

When the electric motor has sleeve bearings it is
necessary to ensure that the motor is aligned to run
on its magnetic centreline.



Refer to the motor manual for details.

A button (screwed into one of the shaft ends) is
normally fitted between the motor and pump shaft
ends to fix the axial position.

4.5 Piping

The user must verify that the equipment is

isolated from any external sources of vibration.

Protective covers are fitted to the pipe
connections to prevent foreign bodies entering during
transportation and installation. Ensure that these
covers are removed from the pump before connecting
any pipes.

4.5.1 Suction and discharge pipe work

Never use the pump as a support for
piping.

Maximum forces and moments allowed on the pump
flanges vary with the pump size and type. To minimize
these forces and moments that may, if excessive, cause
misalignment, hot bearings, worn couplings, vibration
and the possible failure of the pump casing, the
following points should be strictly followed:

• Prevent excessive external pipe load

• Never draw piping into place by applying force to

pump flange connections

• Do not mount expansion joints so that their force,

due to internal pressure, acts on the pump flange.

Ensure piping and fittings are flushed
before use.

Ensure piping for hazardous liquids is arranged

to allow pump flushing before removal of the pump.

4.5.2 Suction piping

a) The inlet pipe should be one or two sizes larger

than the pump inlet bore and pipe bends should
be as large a radius as possible.

b) On suction lift the piping should be inclined up

towards the pump inlet with eccentric reducers
incorporated to prevent air locks.

c) On positive suction, the inlet piping must have a

constant fall towards the pump.

d) Allow a minimum of two pipe diameters of

straight section between the elbow and inlet
flange.

e) Inlet strainers, when used, should have a net `free

area' of at least three times the inlet pipe area.

f) Do not install elbows at an angle other than

perpendicular to the shaft axis. Elbows parallel
to the shaft axis will cause uneven flow.

g) Except in unusual circumstances strainers are

not recommended in inlet piping. If considerable
foreign matter is expected a screen installed at
the entrance to the wet well is preferable.

h) Fitting an isolator and non-return valves can

allow easier maintenance.

i) Never throttle pump on suction side and never

place a valve directly on the pump inlet nozzle.

4.5.3 Discharge piping

A non-return valve should be located in the discharge
pipe work to protect the pump from excessive back
pressure and hence reverse rotation when the unit is
stopped.

4.5.4 Auxiliary piping

4.5.4.1 Pumps fitted with packed gland

When suction pressure is below ambient pressure it
is necessary to feed the gland packing with liquid to
provide lubrication and prevent the ingress of air.

When pumping 'dirty' liquids a clean liquid supply to
the gland is recommended.

4.5.4.2 Pumps fitted with mechanical seals

Single seals requiring re-circulation will normally be
provided with the auxiliary piping from pump casing
already fitted.

Seal housings/covers having an auxiliary quench
connection require connection to a suitable source of
liquid flow, low pressure steam or static pressure
from a header tank. Recommended pressure is 0.35
bar (5psi) or less. Check General arrangement
drawing.

Special seals may require modification to auxiliary
piping described above. Consult separate User
Instructions and or Flowserve if unsure of correct
method or arrangement.

For pumping hot liquids, to avoid seal damage, it is
recommended that any external flush/cooling supply
be continued after stopping the pump.

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

4.5.5 Final checks

Check the tightness of all bolts in the suction and
discharge pipe work. Check also the tightness of all
foundation bolts.

4.6 Final shaft alignment check

After connecting piping to the pump, rotate the shaft
several times by hand to ensure there is no binding
and all parts are free.

Recheck the coupling alignment, as previously
described, to ensure no pipe strain. If pipe strain
exists, correct piping.

4.7 Electrical connections

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

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

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

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.

See section 5.3, Direction of rotation

before connecting the motor to the electrical supply.

4.8 Protection systems

The following protection systems are
recommended particularly if the pump is installed in a
potentially explosive area or is handling a hazardous
liquid. If in doubt consult Flowserve.

If there is any possibility of the system allowing the
pump to run against a closed valve or below
minimum continuous safe flow a protection device
should be installed to ensure the temperature of the
liquid does not rise to an unsafe level.

If there are any circumstances in which the system
can allow the pump to run dry, or start up empty, a
power monitor should be fitted to stop the pump or
prevent it from being started. This is particularly
relevant if the pump is handling a flammable liquid.

If leakage of product from the pump or its associated
sealing system can cause a hazard it is
recommended that an appropriate leakage detection
system is installed.

To prevent excessive surface temperatures at
bearings it is recommended that temperature or
vibration monitoring are carried out. See sections

5.7.4 and 5.7.5.
If a defect of cooling can lead to temperature higher

than those acceptable a system of cooling
surveillance must be installed.

Except when explicitly required by the customer in
the specifications, when a possibility of reverse
rotation exists the customer must install a reverse
rotation protection device.

The customer must install all equipment required to
avoid water hammer.

A device to provide emergency stopping must

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

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

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

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5 COMMISSIONING, START-UP,
OPERATION AND SHUTDOWN

These operations must be carried

out by fully qualified personnel.

5.1 Pre-commissioning procedure

5.1.1 Lubrication

Determine the mode of lubrication of the pump set,
eg grease, oil, product lubrication etc.

The oil filled bottle should then be refitted so as to
return it to the upright position. Filling should be
repeated until oil remains visible within the bottle.

Grease lubricated pumps and electric motors are

For oil lubricated pumps, fill the bearing
housing with correct grade of oil to the correct level, ie
sight glass or constant level oiler bottle.

supplied pre-greased.
Other drivers and gearboxes, if appropriate, should

be lubricated in accordance with their manuals.

In the case of product lubricated

bearings the source of product supply should be

When fitted with a constant level oiler, the bearing
housing should be filled by unscrewing or hinging back
the transparent bottle and filling the bottle with oil. Where

checked against the order. There may be
requirements for an external clean supply, particular
supply pressure or the commencement of lubrication

supply before pump start-up.
an adjustable body Denco oiler is fitted this should be set
to the height shown in the following diagram:

5.2 Pump lubricants

5.2.1 Recommended oil lubricants

Oil Splash / force feed / oil mist lubrication

Viscosity cSt at 40 ºC

Oil temp. range * ºC

lubrication

Centrifugal pump

Oil companies and lubricants

* Note that some oils have a greater Viscosity Index than the minimum acceptable of 95 (eg Mobil DTE13M) which may extend the

minimum temperature capability of the oil. Always check the grade capability where the ambient is less than -5 ºC (-23 ºF).

(ºF)

Designation according

to DIN51502 ISO VG

BP

DEA

Elf

Esso

Mobil

Q8

Shell

Texaco

Wintershall

(BASF Group)

Rando Oil HD-AZ-32

32 46 68

-5 to 65

(-23 to 149)

HL/HLP 32 HL/HLP 46 HL/HLP 68

BP Energol HL32

BP Energol HLP32

Anstron HL32

Anstron HLP32

OLNA 32

HYDRELEF 32

TURBELF 32

ELFOLNA DS32

TERESSO 32

NUTO H32

Mobil DTE oil light

Mobil DTE13M

MobilDTE24

Q8 Verdi 32

Q8 Haydn 32

Shell Tellus 32
Shell Tellus 37

Rando Oil HD 32

Wiolan HN32
Wiolan HS32

-5 to 78

(-23 to 172)

BP Energol HL46

BP Energol HLP46

Anstron HL46

Anstron HLP46

TURBELF SA46
ELFOLNA DS46

TERESSO 46

NUTO H46

Mobil DTE oil medium

Mobil DTE15M

Mobil DTE25

Q8 Verdi 46

Q8 Haydn 46

Shell Tellus 01 C 46

Shell Tellus 01 46

Rando Oil 46

Rando Oil HD B-46

Wiolan HN46
Wiolan HS46

(-23 to 176)

BP Energol HL68

BP Energol HLP68

Anstron HL68

Anstron HLP68

TURBELF SA68
ELFOLNA DS68

TERESSO 68

NUTO H68

Mobil DTE oil heavy medium

Mobil DTE26

Q8 Verdi 68

Q8 Haydn 68

Shell Tellus 01 C 68

Shell Tellus 01 68

Rando Oil 68

Rando Oil HD C-68

Wiolan HN68
Wiolan HS68

-5 to 80

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5.2.2 Recommended grease lubricants

Grease

Temp. range ºC

(ºF)

Designation

according to DIN

BP

DEA

Elf

Esso

Mobil

Q8

Shell

Texaco

Wintershall

(BASF Group)

SKF

Silkolene

* NLGI 2 is an alternative grease and is not to be mixed with other

grades

** Factory packed bearings for the temperature range with grease

nipples

NLGI 2 * NLGI 3 **

-20 to +100
(-4 to +212)

K2K-20 K2K 30

Energrease LS2 Energrease LS3

Glissando 20 Glissando 30

Elfmulti 2 Elfmulti 3
Beacon 2 Beacon 3
Mobilux 2 Mobilux 3

Rembrandt 2 Rembrandt 3

Alvania Fett G2
Alvania Fett R2

Multilak 20

Multilak EP2

Wiolub LFK 2 –

LGMT 2 LGMT 3

G55/T G56/T

Grease nipples

-20 to +100
(-4 to +212)

Alvania R3
Multilak 30

Multilak EP3

5.2.3 Lubrication schedule

5.2.4.1 Oil lubricated bearings

Normal oil change intervals are 4 000 operating hours
or at least every 6 months. For pumps on hot service
or in severely damp or corrosive atmosphere, the oil
will require changing more frequently. Lubricant and
bearing temperature analysis can be useful in
optimizing lubricant change intervals.

The lubricating oil should be a high quality oil having
oxidisation and foam inhibitors, or synthetic oil.

The bearing temperature may be allowed to rise to
50 ºC (122 ºF).above ambient, but should not exceed
82 ºC (180 ºF). A continuously rising temperature, or
an abrupt rise, indicate a fault.

5.2.4.2 Grease lubricated bearings

When grease nipples are fitted, one charge between
grease changes is advisable for most operating
conditions, ie 2 000 hours interval.

Normal intervals between grease changes are 4 000
hours or at least every 6 months.

The characteristics of the installation and severity of

service will determine the frequency of lubrication.

Lubricant and bearing temperature analysis can be

useful in optimizing lubricant change intervals.

The bearing temperature may be allowed to rise to

55 ºC (131 ºF) above ambient but should not exceed

95 °C (204 °F). For most operating conditions a quality

grease having a lithium soap base and NLGI

consistency of No 2 or No 3 is recommended. The

drop point should exceed 175 ºC (350 ºF).

Never mix greases containing different

bases, thickeners or additives.

5.3 Direction of rotation

Starting or operating pumps with the
wrong direction of rotation can be harmful to the
pumps. Ensure that the pump rotation is the same as
the arrow on the pump casing.
It is preferable to check the direction of rotation
before installing the coupling. If not, the pump must
be filled in with the liquid before start-up.

If maintenance work has been carried
out to the site's electricity supply, the direction of
rotation should be re-checked as above in case the
supply phasing has been altered.

5.4 Guarding

Guarding is supplied fitted to the pump set.

If this has been removed or disturbed ensure
that all the protective guards around the pump
coupling and exposed parts of the shaft are securely
fixed.

5.5 Priming and auxiliary supplies

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.

Ensure all electrical, hydraulic,
pneumatic, sealant and lubrication systems (as
applicable) are connected and operational.

Ensure the inlet pipe and pump casing
are completely full of liquid before starting continuous
duty operation.

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These operations must be carried out by personnel
with approved qualifications.
liquid before starting continuous duty operation.

5.6 Starting the pump

a) Ensure flushing and/or cooling/

heating liquid supplies are turned ON before

starting the pump.
b) CLOSE the outlet valve.
c) OPEN all inlet valves.
d) Prime the pump.

e) Ensure all vent connections are closed

before starting.
f) Start motor and check outlet pressure.
g) If the pressure is satisfactory, slowly OPEN outlet

control valve.
h) Do not run the pump with the

outlet valve closed for a period longer than 30

seconds.
i) If NO pressure, or LOW pressure, STOP the

pump. Refer to section 7, Faults; causes and

remedies, for fault diagnosis.

5.7 Running the pump

5.7.1 Venting the pump

Vent the pump to enable all trapped air to

escape taking due care with hot or hazardous liquids.
Under normal operating conditions, after the pump

has been fully primed and vented, it should be
unnecessary to re-vent the pump.

5.7.2 Pumps fitted with packed gland

If the pump has a packed gland there must be some
leakage from the gland. Gland nuts should initially be
finger-tight only. Leakage should take place soon
after the stuffing box is pressurized.

If no leakage takes place the packing will begin to
overheat. If overheating takes place the pump should
be stopped and allowed to cool before being re­started. When the pump is re-started, check to
ensure leakage is taking place at the packed gland.

If hot liquids are being pumped it may be necessary
to slacken the gland nuts to achieve leakage.

The pump should be run for 30 minutes with steady
leakage and the gland nuts tightened by 10 degrees
at a time until leakage is reduced to an acceptable
level, normally a minimum of 120 drops per minute is
required. Bedding in of the packing may take another
30 minutes.

Care must be taken when adjusting the gland
on an operating pump. Safety gloves are essential.
Loose clothing must not be worn to avoid being
caught up by the pump shaft. Shaft guards must be
replaced after the gland adjustment is complete.

Never run gland packing dry, even for

a short time.

5.7.3 Pumps fitted with mechanical seal

Mechanical seals require no adjustment. Any slight
initial leakage will stop when the seal is run in.

Before pumping dirty liquids it is advisable, if
possible, to run in the pump mechanical seal using
clean liquid to safeguard the seal face.

External flush or quench should be
started before the pump is run and allowed to flow for
a period after the pump has stopped.

Never run a mechanical seal dry, even
for a short time.

5.7.4 Bearings

If the pumps are working in a potentially
explosive atmosphere, temperature or vibration
monitoring at the bearings is recommended.
If bearing temperatures are to be monitored it is
essential that a benchmark temperature is recorded
at the commissioning stage and after the bearing
temperature has stabilized.

• Record the bearing temperature (t) and the

ambient temperature (ta)

• Estimate the likely maximum ambient

temperature (tb)

• Set the alarm at (t+tb-ta+5) °C [(t+tb-ta+10) °F]

and the trip at 100 °C (212 °F) for oil lubrication

and 105 °C (220 °F) for grease lubrication
It is important, particularly with grease lubrication, to
keep a check on bearing temperatures. After start up
the temperature rise should be gradual, reaching a
maximum after approximately 1.5 to 2 hours. This
temperature rise should then remain constant or
marginally reduce with time. (Refer to section 6.2.3.1
for further information.)

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5.7.5 Normal vibration levels, alarm and trip

For guidance, pumps generally fall under a classification
for rigid support machines within the International
rotating machinery standards and the recommended
maximum levels below are based on those standards.

Alarm and trip values for installed
pumps should be based on the actual measurements
(N) taken on site on the bearing housings of the
pump in the fully commissioned as new condition.
The example (N) value is given for the preferred
operating flow region (typically this may extend to 70
to 120% of the pump best efficiency point); outside
the preferred flow region the actual vibration
experienced may be multiplied by up to two.

These standard values can vary with the rotational
speed and the power absorbed by the pump. For any
special case, contact your nearest Flowserve office.

Measuring vibration at regular intervals will show any
deterioration in pump or system operating conditions.

Vibration velocity –

unfiltered

Normal N
Alarm N x 1.25
Shutdown trip N x 2.0

Horizontal

pumps mm/s

(in./s) r.m.s.

≤ 5.6 (0.22) ≤ 7.1 (0.28)
≤ 7.1 (0.28) ≤ 9.0 (0.35)

≤ 11.2 (0.44) ≤ 14.2 (0.56)

Vertical pumps

mm/s (in./s)

r.m.s.

5.7.6 Stop/start frequency

Pump sets are normally suitable for the number of
equally spaced stop/starts per hour shown in the
table below. Check actual capability of the driver and
control/starting system before commissioning.

Motor rating kW (hp)

Up to 15 (20) 15

Between 15 (20) and 90 (120)

90 (120) to 150 (200) 6

Above 150 (200) Refer

Maximum stop/starts per hour

10

Where duty and standby pumps are installed it is
recommended that they are run alternately every week.

5.8 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.

5.9 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 may
help the user decide how to evaluate the implications
of any change. If in doubt contact your nearest
Flowserve office.

5.9.1 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 over-pressurize
the pump.

5.9.2 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.

5.9.3 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 and power varies as speed ratio cubed.
The new duty, however, will also be dependent on the
system curve. If increasing the 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.

5.9.4 Net positive suction head (NPSHA)

NPSH available (NPSHA) is the head available at the
impeller inlet, above the vapour pressure of the
pumped liquid.

NPSH required (NPSHR) is the minimum head required
at the impeller inlet, above the vapour pressure of the
pumped liquid, to avoid excessive cavitation and
extreme performance degradation.

It is important that NPSHA > NPSHR. The margin
between NPSHA > NPSHR should be as large as
possible.

Page 18 of 32 flowserve.com

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

If any change in NPSHA is proposed, ensure these
margins are not significantly eroded. Refer to the
pump performance curve to determine exact
requirements particularly if flow has changed. If in
doubt please consult your nearest Flowserve office
for advice and details of the minimum allowable
margin for your application.

5.9.5 Pumped flow

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

6 MAINTENANCE

6.1 General

If a belt drive is used, the assembly and tension
of the belts must be verified during regular
maintenance procedure.

In dirty or dusty environments, regular checks
must be made and dirt removed from areas around
close clearances, bearing housings and motors.

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 5.8.

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. It should include the following:
a) The pump must be completely vented and

drained and rendered inert before any
disassembly operation.

b) Any auxiliary systems installed must be

monitored, if necessary, to ensure they function
correctly.

c) During cleaning of the pump ensure the

compatibility between the cleaning products and

the gaskets.
d) Verify the condition of the gaskets.
e) 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.

Mechanical seals should present no leakage.
f) Check for any leaks from gaskets and seals. The

correct functioning of the shaft seal must be

checked regularly.
g) Check bearing lubricant level, and if the hours

run show a lubricant change is required.
h) Check that the duty condition is in the safe

operating range for the pump.
i) Check vibration, noise level and surface

temperature at the bearings to confirm

satisfactory operation.
j) Check the tightness of the connections.

Page 19 of 32 flowserve.com

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

k) Check dirt and dust is removed from areas

around close clearances, bearing housings and
motors.

l) Check coupling alignment and re-align if

necessary.

m) Verify the correct operation of the system.
The equipment used for maintenance and

disassembly in an ATEX zone must be in conformity
with the requirements zone.

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 7, 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 oil lubricant.

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

e) Check any auxiliary supplies eg heating/cooling,

if fitted, are functioning correctly.



Refer to the manuals of any associated

equipment for routine checks needed.

6.2.2 Periodic inspection (six monthly)

a) Check foundation bolts for security

of attachment and corrosion.

b) Check pump running records for hourly usage to

determine if bearing lubricant requires changing.

c) The coupling should be checked for correct

alignment and worn driving elements.



Refer to the manuals of any associated

equipment for periodic checks needed.

6.2.3 Mechanical seals

When leakage becomes unacceptable the seal will
need replacement.

6.2.4 Gland packing

The stuffing box gland can be withdrawn for re­packing or to enable the addition of extra rings of
packing.

The stuffing box is normally supplied with a lantern
ring to enable a clean or pressurised flush to the
centre of the packing. If not required, this can be
replaced by an extra two rings of packing.

6.2.5 Internal coating

If the pump has an internal coating, this coating must
be inspected periodically. Any wear or cracks of the
coating found must be immediately repaired. Failure
to do this may lead to accelerated wear of the coating
during operation and corrosion of the exposed base
metal, depending on the material and pumped liquid.
Special attention must be paid to the coating edges.
Any loss of coating material is considered to be
normal wear and tear on the pump and is not
considered as warranty. Flowserve has applied the
coatings according to the supplier's instructions but
will not be held responsible for coating wear or cracks
that may develop over time.

6.3 Spare parts

6.3.1 Ordering of spares

Flowserve keep records of all pumps that have been
supplied. When ordering spares the following
information should be quoted:

1) Pump serial number.

2) Pump size

3) Part name

4) Part number

5) Number of parts required.

The pump size and serial number are shown on the
pump nameplate.

To ensure continued 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 part) will
invalidate the pump’s safety certification.

Page 20 of 32 flowserve.com

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

6.3.2 Storage of spares

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

6.4 Recommended spares and
consumable items

For start up purposes:

1 - Complete set of gland packing
2 - Shaft sleeves
1 - Set of gaskets and seals

Optional

2 - Mechanical seals

For 2 years operation:

1 - Set of bearings (line and thrust)
2 - Sets of gland packing
2 - Shaft sleeves
2 - Sets of gaskets and seals
2 - Lantern rings
2 - Casing wear rings

Optional

2 - Mechanical seals
2 - Impeller wear rings

For 4 years operation:

1 - Set of bearings (line and thrust)
2 - Sets of gland packing
2 - Shaft sleeves
2 - Sets of gaskets and seals
2 - Lantern rings
2 - Casing wear rings
1 - Impeller
1 - Complete set of mechanical seals and
gaskets

Optional

2 - Mechanical seals
2 - Impeller wear rings

6.5 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.

6.5.1 Rotor unit

a) Remove coupling guards and disconnect the

coupling halves.

b) Drain pump casing. Remove any auxiliary piping

if applicable.
c) Unscrew and remove bearing housing setscrews.
d) Remove the gland or seal cover stud nuts and

loosen gland or seal cover plates.
e) Unscrew and remove nuts above split flange on

upper half casing.
f) Drive out location pin (if fitted) from casing flange

halves.
g) Remove upper half casing.
h) Take out complete rotor unit and place onto two

support blocks.

6.5.2 Bearing housing

The bearing housings and bearings can be
removed without removal of the upper half casing if
desired.

a) Remove bearing cover setscrews and remove

key from shaft end.

b) Pull off bearing housing from rotor.

6.5.2.1 Line bearings

Remove bearing from shaft using a bearing puller
ensuring pulling force is applied to the inner race
only.

6.5.2.2 Thrust bearings
Unscrew and remove the self locking bearing nut and
remove the bearing using a puller as above.

6.5.3 Shaft seal

Stuffing box: remove gland, gland packing rings and
lantern rings using a bent wire.

Mechanical seal: remove seal cover complete with
the stationary seal ring which is held in place by the
O-ring seal.

6.5.4 Shaft sleeve

Loosen grub screw and unscrew shaft nut. Remove
shaft sleeve.

6.5.5 Wear rings

a) When removing the rotor unit, the casing rings

will be attached to it.

b) Impeller rings are also fitted; they are shrunk

onto the impeller and fixed with locking screws
between their diametral mating surfaces. To
remove the impeller rings, remove the locking
screws and heat up the ring until it slides off
easily.

Page 21 of 32 flowserve.com

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

6.6 Examination of parts

Used parts must be inspected before
assembly to ensure the pump will subsequently run
properly.

In particular, fault diagnosis is essential to enhance
pump and plant reliability.

6.6.1 Casing and impeller

Inspect for excessive wear, pitting, corrosion, erosion or
damage and any sealing surface irregularities. Replace
as necessary.

6.6.2 Shaft and sleeve

Replace if grooved, pitted or worn.

6.6.3 Gaskets and O-rings

After dismantling, discard and replace.

6.6.4 Bearings

It is recommended that bearings are not re-used after
any removal from the shaft.

6.7 Assembly

To assemble the pump consult the sectional
drawings, see section 8, Parts list and drawings.

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

6.7.1 Wear rings

a) Impeller rings (when fitted) should be heated up

using a hotplate or hot oil bath and then slipped
onto the impeller and pressed down to the
shoulder. (Do not use a steel hammer to knock it
into position.)

b) Drill and tap equi-spaced holes into the

diametral mating faces of the ring and impeller
and insert grubscrews. (The existing half-tapped
holes from the removed impeller ring cannot be
re-used).

c) Slip the casing wear rings over the impeller hubs

before mounting the rotor unit into the lower half
casing.

6.7.2 Rotor unit

The two shaft sleeves and shaft nuts clamping the
impeller define its position on the pump shaft and
hence in the pump casing.

6.7.3 Shaft seal – stuffing box

a) Fit impeller key and slide impeller onto shaft.
b) Insert O-ring into shaft sleeves and slide sleeves

along shaft up to the impeller hubs.

c) Lightly lubricate the shaft and O-ring for easier

assembly.

d) Tighten and adjust the shaft nuts so that they

are equi-distant about the pump centre line.

e) Lock the shaft nuts in place with grubscrews.

6.7.4 Shaft seal – mechanical seal

For assembly of mechanical seal refer to the seal
arrangement drawing supplied with the contractual
documentation.

6.7.5 Bearings

Before mounting the bearings, proceed as follows:
a) Mount the flingers onto the shaft and slide the

bearing cover over the shaft.

b) Position the bearings onto the shaft.

6.7.6 Rotor unit

After completion of preceding steps, carefully place the
rotor into the lower half pump casing.

6.7.7 Casing gasket

a) The gasket must be cut from asbestos free

sheet material of 0.8 +0.1/-0.05mm (1/32")
thickness, by following the actual inner casing
contour of the lower half casing. Special care
must be exercised at the bores and stuffing box.

b) Position gasket carefully onto the cleaned

surface of the lower half casing.

c) Coat the flange surface of the wall between

suction and discharge side with an adhesive
paste (Cyanoacrylate or RTV silicone).

d) Place upper half casing onto pump ensuring

dowels make correct alignment.

e) Tighten upper half casing flange nuts to correct

torque.

Page 22 of 32 flowserve.com

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

6.7.8 Bearing housing

a) Slip the bearing housings over their respective

bearings and insert them into the recesses of the

pump casing.
b) Fit bearing housing setscrews and tighten.
c) Refit bearing covers.
d) Apply liquid sealant to bearing cover flange.
e) Tighten bearing cover at bearing housing.
f) Refit plugs, vents, oiler etc as applicable.

6.7.9 Stuffing box assembly - soft packing

a) Insert inner two rings of packing, then lantern
ring halves and finally outer rings of packing.
b) Loosely fit the gland and connect flush line.

6.7.10 Stuffing box assembly - mechanical seal

a) Fasten seal cover complete with O-ring and

connect flush line.
b) Connect any auxiliary piping.

Page 23 of 32 flowserve.com

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

7 FAULTS; CAUSES AND REMEDIES

FAULT SYMPTOM
Pum p overheats and s eizes

Bearings have short l if e

⇓⇓⇓⇓

⇓⇓⇓⇓

Pum p vibrate s or is noi sy

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal has sho rt life

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal leaks e xces sively

⇓⇓⇓⇓





















⇓⇓⇓⇓

Pum p requires excessive pow er

⇓⇓⇓⇓

⇓⇓⇓⇓

Pum p loses p rime after starting

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient p ressure devel oped

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient capaci ty deli vered

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

































 





















  

















 



 



 



 





















 



  



  

 

Pum p does not deliver l iq ui d

⇓⇓⇓⇓

⇓⇓⇓⇓

PROBABLE CAUSES POSSIBLE REMEDIES



Pump not primed.



Pump or suction pipe not completely filled with
liquid.

Suction lift too high or level too low.
Insufficient margin between suction pressure and

vapor pressure.
Excessive amount of air or gas in liquid. Check and purge pipes and system.
Air or vapor pocket in suction line. Check suction line design for vapor pockets.
Air leaks into suction line. Check suction pipe is airtight.
Air leaks into pump through mechanical seal,

sleeve joints, casing joint or pipe plugs.
Foot valve too small. Investigate replacing the foot valve.
Foot valve partially clogged. Clean foot valve.
Inlet of suction pipe insufficiently submerged. Check out system design.
Speed too low. CONSULT FLOWSERVE.
Speed too high. CONSULT FLOWSERVE.
Total head of system higher than differential head

of pump.
Total head of system lower than pump design

head.
Specific gravity of liquid different from design.
Viscosity of liquid differs from that for which

designed.
Operation at very low capacity.

Operation at high capacity.

A. System troubles

Check complete filling. Vent and/or prime.

Check NPSHA>NPSHR, proper submergence,
losses at strainers and fittings.

Check and replace faulty parts.
CONSULT FLOWSERVE.

Check system losses.
Remedy or CONSULT FLOWSERVE.

Check and CONSULT FLOWSERVE.

Measure value and check minimum permitted.
Remedy or CONSULT FLOWSERVE.

Measure value and check maximum permitted.
Remedy or CONSULT FLOWSERVE.

B. Mechanical troubles

     



    

Misalignment due to pipe strain.

Improperly designed foundation.

Shaft bent.

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 shaft runouts are within acceptable values.
CONSULT FLOWSERVE.

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

FAULT SYMPTOM
Pum p overhea ts and seizes

Bearings have short l if e

⇓⇓⇓⇓

⇓⇓⇓⇓

Pum p vibrate s or is noi sy

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal has sho rt life

⇓⇓⇓⇓

⇓⇓⇓⇓

Mechanical seal leaks e xces sively

⇓⇓⇓⇓

  

    






    

    



  



⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓









 



  

  

  



 

 

 

 



 

 

 

Pum p requires excessive pow er

Pum p loses p rime after starting

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient p ressure devel oped

⇓⇓⇓⇓

⇓⇓⇓⇓

Insufficient capaci ty deli vered

⇓⇓⇓⇓

⇓⇓⇓⇓

Pum p does not deliver l iq ui d

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

⇓⇓⇓⇓

PROBABLE CAUSES POSSIBLE REMEDIES









 





 

Rotating part rubbing on stationary part internally. Check and CONSULT FLOWSERVE, if necessary.
Bearings worn. Replace bearings.
Wearing ring surfaces worn. Replace worn wear ring/surfaces.
Impeller damaged or eroded.

Leakage under sleeve due to joint failure. Replace joint and check for damage.
Shaft sleeve worn or scored or running off centre. Check and renew defective parts.
Mechanical seal improperly installed.

Incorrect type of mechanical seal for operating
conditions.

Shaft running off centre because of worn bearings
or misalignment.

Impeller out of balance resulting in vibration.
Abrasive solids in liquid pumped.
Internal misalignment of parts preventing seal ring

and seat from mating properly.
Mechanical seal was run dry.

Internal misalignment due to improper repairs
causing impeller to rub.

Excessive thrust caused by a mechanical failure
inside the pump.

Excessive grease in ball bearings. Check method of regreasing.
Lack of lubrication for bearings.

Improper installation of bearings (damage during
assembly, incorrect assembly, wrong type of
bearing etc).

Damaged bearings due to contamination.

Replace or CONSULT FLOWSERVE for improved
material selection.

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 and CONSULT FLOWSERVE.

Check mechanical seal condition and source of dry
running and repair.

Check method of assembly, possible damage or
state of cleanliness during assembly.
Remedy or CONSULT FLOWSERVE, if necessary.

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. Remedy or CONSULT
FLOWSERVE, if necessary.

Check contamination source and replace damaged
bearings.

C. MOTOR ELECTRICAL PROBLEMS










 






 















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



Motor running on 2 phases only. Check supply and fuses.





Motor running too slow. Check motor terminal box connections and voltage.



Page 25 of 32 flowserve.com

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

Option

-

Angular contact double

8 PARTS LISTS AND DRAWINGS

8.1 Sectional drawing

8.1.1 LN, LNE and LNH

bearing

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

8.1.2 LNC and LNEC

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LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

8.1.3 LNV and LNEV

Page 28 of 32 flowserve.com

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

8.2 Sectional drawing parts list

8.2.1 LN, LNE and LNH

Ref no. Description

1 Nameplate for bearing housing
2 Far side bearing housing
3 Far side bearing locknut
4 Far side bearing lockwasher
5 Far side ball bearing
6 Far side bearing housing cover
7 Mechanical seal assembly
8 Seal cover/gland stud with nut
9 Pump shaft
10 Pump shaft sleeve
11 Casing renewable ring
12 Top half casing
13 Impeller
14 Impeller key
15 Impeller hub ring
16 Screw for hub ring
17 Pipe for product recirculation
18 Bottom half casing
19 O-ring for shaft sleeve
20 Shaft sleeve nut
21 Water thrower
22 Drive side bearing housing cover
23 Drive side ball bearing
24 Drive side bearing housing
25 Coupling key
26 Locating pin for casing renewable ring
27 Grease nipple
28 Lantern ring
29 Gland packing
30 Gland

8.2.2 LNC and LNEC

Ref no. Description

101 Casing lower

101.2 Gland stud
102 Casing upper
109 Casing gasket
161 Casing wear ring

161.1 Retaining pin
211 Bearing housing (DE)

211.1 Set screw
212 Bearing housing (NDE)
231 Ball bearing (NDE)
241 Ball bearing (DE)
251 End cover

251.1 Set screw
252 Bearing cover (DE)

252.1 Set screw
253 Bearing cover (NDE)
281 End cover gasket
301 Shaft
302 Key, impeller
309 Key, coupling
311 Impeller
321 Impeller hub ring

321.1 Set screw
351 Shaft sleeve
363 Sleeve nut

363.1 Set screw
364 Bearing locknut
366 Shim pack

366.1 Circlip
375 O-ring
378 V-ring
379 Lip seal
382 Distance sleeve
404 Gland packing
405 Lantern ring
406 Gland
500 Plan ll seal pipe

8.2.3 LNNV and LNNEV

Ref no. Description

101 Casing lower
102 Casing upper
109 Casing gasket
161 Casing wear ring

161.1 Retaining pin
211 Bearing housing (DE)

211.1 Set screw
221 Bearing housing, lower

221.1 O-ring
241 Angular contact bearing

241.1 Bearing shim pack
248 Lower sleeve bearing
251 End cover

251.1 Stud

251.2 Nut
252 Bearing cover (DE)
280 Grease nipple
281 End cover gasket
301 Shaft
302 Key, impeller
306 Key, lower sleeve
309 Key, coupling
311 Impeller
321 Impeller hub ring

321.1 Set screw
351 Shaft sleeve
352 Lower sleeve
353 Bearing sleeve
363 Sleeve nut

363.1 Set screw
364 Bearing locknut
371 End cap

371.1 Capscrew
375 O-ring
378 V-ring
379 V ring
382 Distance sleeve
420 Mechanical seal assembly
500 Plan ll seal pipe

500.1 Product lube pipe

8.3 General arrangement drawing

The typical general arrangement drawing and any
specific drawings required by the contract will be sent to
the Purchaser separately unless the contract specifically
calls for these to be included into the User Instructions.
If required, copies of other drawings sent separately to
the Purchaser should be obtained from the Purchaser
and retained with these User Instructions.

Page 29 of 32 flowserve.com

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

9 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 OTHER RELEVANT DOCUMENTATION
AND MANUALS

10.1 Supplementary User Instructions

Supplementary instructions such as for a driver,
instrumentation, controller, seals, sealant system etc
are provided as separate documents in their original
format. If further copies of these are required they
should be obtained from the supplier for retention
with these User Instructions.

10.2 Change notes

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

10.3 Additional sources of information

Reference 1:

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

Reference 2:

Pumping Manual, 9th edition, T.C. Dickenson,
Elsevier Advanced Technology, United Kingdom, 1995.

Reference 3:
Pump Handbook, 2nd edition, Igor J. Karassik et al,
McGraw-Hill Inc., New York, 1993.

Reference 4:

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

Reference 5:

ANSI B31.3 - Process Piping.

Page 30 of 32 flowserve.com

Nota :

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

Page 31 of 32 flowserve.com

LN, LNE, LNH, LNV, LNEV, LNC and LNEC USER INSTRUCTIONS ENGLISH 71576423 11-09

Your Flowserve factory contacts:

Nominal pump discharge <= 350:
Flowserve Pumps Limited
PO Box 17, Newark, Notts NG24 3EN
United Kingdom

Telephone (24 hours) [phone]
Sales & Admin Fax [phone]
Repair & Service Fax [phone]
E-mail [e-mail]

Nominal pump discharge > 350:
Flowserve Pompes
13, rue Maurice Trintignant
72234 Arnage Cedex, France

Telephone (24 hours) [phone]
Sales & Admin [phone]
Repair & Service Fax [phone]

Your local Flowserve representative:

North America:
Flowserve Pump Division
5310 Taneytown Pike, PO Box 91
Taneytown, MD 21787-0091, USA

Telephone [phone]
Customer Service Fax [phone]
Parts inquiry/order PH [phone]

South America:
Flowserve do Brasil Ltda
Av. Don Hélder Camara 5451
20771-001 Rio de Janerio, Brasil

Telephone [phone]
Fax [phone]

To find your local Flowserve representative please
use the Sales Support Locator System found at
www.flowserve.com

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
200 Pandan Loop #06-03/04
Pantech 21
Singapore 128388
Telephone [phone]
Fax [phone]