Flowserve LNN User Manual

USER INSTRUCTIONS

WORTHINGTON® LNN, LNNV and LNNC centrifugal pumps

Installation

Operation

Maintenance

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

PCN=71569074 06-14 (E). (Based on C953KH001.) Original instructions.

These instructions must be read prior to installing,

operating, using and maintaining this equipment.

LNN, LNNV, LNNC USER INSTRUCTIONS ENGLISH 71569074 06-14

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 ....................... 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 .................................................. 13

4.1 Location......................................................... 13

4.2 Part assemblies ............................................ 13

4.3 Foundation .................................................... 13

4.4 Grouting ........................................................ 14

4.5 Initial alignment ............................................. 14

4.6 Piping ............................................................ 15

4.7 Final shaft alignment check .......................... 19

4.8 Electrical connections ................................... 19

4.9 Protection systems ........................................ 20

5 COMMISSIONING, START-UP, OPERATION

AND SHUTDOWN ............................................. 20

5.1 Pre-commissioning procedure ...................... 20

5.2 Pump lubricants ............................................ 21

5.3 Direction of rotation ....................................... 22

5.4 Guarding ....................................................... 22

5.5 Priming and auxiliary supplies ...................... 23

5.6 Starting the pump .......................................... 23

5.7 Running the pump ......................................... 23

5.8 Stopping and shutdown ................................ 25

5.9 Hydraulic, mechanical and electrical duty..... 25

Page

6 MAINTENANCE ................................................. 26

6.1 General .......................................................... 26

6.2 Maintenance schedule .................................. 26

6.3 Spare parts .................................................... 29

6.4 Recommended spares and

consumable items.......................................... 29

6.5 Tools required ................................................ 29

6.6 Fastener torques ........................................... 29

6.7 Renewal clearances ...................................... 30

6.8 Disassembly .................................................. 30

6.9 Examination of parts ...................................... 32

6.10 Assembly ....................................................... 32

7 FAULTS; CAUSES AND REMEDIES ................. 37

8 PARTS LISTS AND DRAWINGS ........................ 39

8.1 LNN and LNNC – grease lubricated, gland packed and component mechanical seal

option – sizes up to 350 mm discharge ......... 39

8.2 LNN and LNNC – grease lubricated and gland packed option – sizes greater than

350 mm discharge ......................................... 42

8.3 LNNV sleeve bearing type – grease lubricated, component mechanical seal and gland packed option

– sizes up to 350 mm discharge .................... 46

8.4 LNNV sleeve bearing type – grease lubricated and gland packed option

– sizes greater than 350 mm discharge ........ 49

8.5 General arrangement drawing ....................... 51

9 CERTIFICATION ................................................ 51

10 OTHER RELEVANT DOCUMENTATION

AND MANUALS .................................................. 52

10.1 Supplementary User Instructions .................. 52

10.2 Change notes ................................................ 52

10.3 Additional sources of information .................. 52

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INDEX

Page

Additional sources (10.3) ......................................... 52

Alignment of shafting (see 4.3, 4.5 and 4.7)

Assembly (6.10) ....................................................... 32

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

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

Certification (9) ........................................................ 51

Change notes (10.2) ................................................ 52

Clearances (see 6.7, Renewal clearances) ............. 30

Commissioning and operation (5) ............................ 20

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

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

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

Direction of rotation (5.3) ......................................... 22

Disassembly (6.8) .................................................... 30

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

Dismantling (see 6.8, Disassembly) ........................ 30

Drawings (8)............................................................. 39

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

Electrical connections (4.8)...................................... 19

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

Examination of parts (6.9) ........................................ 32

Fastener torques (6.6) ............................................. 29

Faults; causes and remedies (7) ............................. 37

Foundation (4.3) ...................................................... 13

Forces and moments (4.6.2).................................... 16

General arrangement drawing (8.5) ........................ 51

Grouting (4.4) ........................................................... 14

Guarding (5.4) .......................................................... 22

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

Hydraulic, mechanical and electrical duty (5.9) ....... 25

Impeller clearance (6.7) ........................................... 30

Inspection (6.2.1 and 6.2.2) ..................................... 27

Installation (4) .......................................................... 13

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

Location (4.1) ........................................................... 13

Lubrication (see 5.1.1, 5.2 and 6.2.3)

Lubrication schedule (5.2.4) .................................... 22

Maintenance (6) ....................................................... 26

Maintenance schedule (6.2) .................................... 26

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

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

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

Ordering spare parts (6.3.1) .................................... 29

Part assemblies (4.2) ............................................... 13

Parts lists (8) ............................................................ 39

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

Piping (4.6)............................................................... 15

Pre-commissioning (5.1) .......................................... 20

Protection systems (4.9) .......................................... 20

Pump and impeller data (3.4.2) ............................... 12

Page

Reassembly (see 6.10, Assembly) ...........................32

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

Recommended fill quantities (5.2.3) .........................21

Recommended grease lubricants (5.2.2) .................21

Recommended oil lubricants (5.2.1) ........................21

Recommended spares (6.4) .....................................29

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

Replacement parts (see 6.3 and 6.4) .......................29

Running the pump (5.7) ...........................................24

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 4.9)

Sectional drawings (8) ..............................................39

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

Sources, additional information (10.3) .....................52

Spare parts (6.3) ......................................................29

Specific machine performance (1.8) .......................... 9

Starting the pump (5.6).............................................23

Stop/start frequency (5.7.6) ......................................24

Stopping and shutdown (5.8) ...................................25

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

Storage, spare parts (6.3.2) .....................................29

Supplementary manuals or information

sources (10) ........................................................52

Thermal expansion (4.5.1) .......................................14

Tools required (6.5) ..................................................29

Torques for fasteners (6.6) .......................................29

Trouble-shooting (see 7) ..........................................37

Vibration (5.7.5) ........................................................24

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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

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.

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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.

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 fluoro-elastomers (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 80 °C (175 °F) or

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

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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.

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.

1.6.4 Products used in potentially explosive atmospheres

Measures are required to:

 Avoiding excessive surface temperature  Preventing build up of explosive mixtures  Preventing the generation of sparks  Preventing leakages  Maintaining 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 European Directive 2014/34/EU (previously 94/9/EC which remains valid until 20 April 2016 during the transition). 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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Temperature class

to EN13463-1

Maximum surface

temperature permitted

Temperature limit of

liquid handled

T6 T5 T4 T3 T2 T1

85 °C (185 °F)

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

65 °C (149 °F) *

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

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)

b = Control of ignition source

(in accordance with EN13463-6) Gas Group

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

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

1.6.4.3 Avoiding excessive surface 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 °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 ATEX temperature class and must not exceed the values in the table that follows:

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

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

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

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

operator.

Temperature classification “Tx” is used when the liquid

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

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 (for example 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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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

the requirements of European Directive 2014/34/EU (previously 94/9/EC which remains valid until 20 April 2016 during the transition). Correct coupling alignment must be maintained.

Additional requirement for metallic pumps on nonmetallic baseplates

When metallic components are fitted on a non-metallic 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 a liquid detection device

1.6.4.7 Maintenance to avoid the hazard

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:

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.

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Motor size and speed

kW (hp)

Typical sound pressure level L

at 1 m reference 20 μPa, dBA

3 550 r/min

2 900 r/min

1 750 r/min

1 450 r/min

Pump

only

Pump and

motor

Pump

only

Pump and

motor

Pump

only

Pump and

motor

Pump

only

Pump and

motor

5.5 (7.5)

7.5 (10)

11(15)

15 (20)

18.5 (25)

22 (30)

30 (40)

37 (50)

45 (60)

55 (75)

75 (100)

90 (120)

110 (150)

150 (200)

200 (270)

  



300 (400)

–

500 (670)

88  86



1 000 (1 300)

90  88



1 500 (2 000)

90  90



1.8 Specific machine performance

For performance parameters see section 1.5, Duty conditions. When the contract requirement specifies

these to be incorporated into User Instructions these are included here. Where performance data has been

supplied separately to the purchaser these should be obtained and retained with these User Instructions if required.

1.9 Noise level

Attention must be given to the exposure of personnel to the noise, and local legislation will define when guidance to personnel on noise limitation is required, and when noise exposure reduction is mandatory. This is typically 80 to 85 dBA.

The usual approach is to control the exposure time to the noise or to enclose the machine to reduce emitted sound. You may have already specified a limiting noise level when the equipment was ordered, however if no noise requirements were defined, then attention is drawn to the following table to give an indication of equipment noise level so that you can take the appropriate action in your plant.

Pump noise level is dependent on a number of operational factors, flow rate, pipework design and acoustic characteristics of the building, and so the values given are subject to a 3 dBA tolerance and cannot be guaranteed.

Similarly the motor noise assumed in the “pump and motor” noise is that typically expected from standard and

high efficiency motors when on load directly driving the pump. Note that a motor driven by an inverter may show an increased noise at some speeds.

If a pump unit only has been purchased for fitting with

your own driver then the “pump only” noise levels in the

table should be combined with the level for the driver obtained from the supplier. Consult Flowserve or a noise specialist if assistance is required in combining the values.

It is recommended that where exposure approaches the prescribed limit, then site noise measurements should be made.

The values are in sound pressure level LpA at 1 m (3.3

ft) from the machine, for “free field conditions over a reflecting plane”.

For estimating sound power level LWA (re 1 pW) then add 17 dBA to the sound pressure value.

 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.

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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 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

Unit must not be moved as an

assembled unit.

A crane must be used for all pump sets and components 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. 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.

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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.

3 PUMP DESCRIPTION

3.1 Configurations

The LNN type pump is a single stage, double suction, horizontal split volute type centrifugal pump designed for water works, drainage, general service and circulating applications. It can be used with motor, steam turbine and gasoline or diesel engine drives.

The LNN can have the following configurations:

LNN horizontal suction and discharge nozzles (inline)

LNNC bottom vertical suction, horizontal discharge

LNNV horizontal suction/discharge, vertical shaft (inline)

There is also an advanced design designated LNNA.

3.2 Name nomenclature

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

400-LNNA-875-AA

Nominal discharge branch size Configuration – see 3.1 above Nominal maximum impeller diameter

Impeller hydraulic type * Casing hydraulic type *

(* Normally the hydraulic type will appear on the performance curve.)

The typical nomenclature above is the general guide to the LNN 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 as standard and may be either oil or grease lubricated, protected by V-ring seals.

Oil lubrication is only available where the pump shaft is horizontal.

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

The LNNV 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. A grease lubricated ball bearing option may be fitted at the non-drive end.

Page 11 of 56 flowserve.com

LNN, LNNV, LNNC USER INSTRUCTIONS ENGLISH 71569074 06-14

Pumped liquid temperature limits

-20 to +80 ºC (-4 to +176 ºF)

High temperature liquid limits *

-20 to +130 ºC (-4 to +266 ºF)

Maximum ambient temperature

-20 to +40 ºC (-4 to +104 ºF)

Maximum soft solids in suspension *

up to 3 % by volume (refer for size limits)

Maximum pump speed

refer to the nameplate

Pump size

Hydraulic

Impeller

type

Impeller

minimum

passage size

mm (in.)

Nominal

wear ring

diameter

mm (in.)

Mean radial

wear ring

clearance

mm (in.)

200LNN300

22.4 (0.90)

215 (8.5)

0.3 (0.012)

200LNN325

24.3 (0.96)

240 (9.5)

200LNN375

A and B

25.5 (1.00)

215 (8.5)

200LNN400

29.6 (1.20)

240 (9.5)

200LNN475

24.0 (0.95)

200LNN500

17.5 (0.70)

215 (8.5)

200LNN525

30,0 (1.20)

240 (9.5)

200LNN600

A and B

16.0 (0.63)

250LNN325

30.1 (1.20)

250LNN375

A and B

27.8 (1.10)

264 (10.4)

250LNN475

32.5 (1.30)

250LNN600

22.0 (0.87)

250LNN650

32.0 (1.26)

330 (13.0)

300LNN325

20.0 (0.78)

300 (11.8)

300LNN450

30 (1.20)

300LNN475

A and B

36.3 (1.40)

330 (13.0)

300LNN500

36.8 (1.40)

300 (11.8)

300LNN575

42.9 (1.70)

350 (13.8)

300LNN600

30.0 (1.20)

300 (11.8)

300LNN625

25.0 (1.00)

330 (13.0)

300LNN750

27.9 (1.10)

350LNN375

25.0 (0.94)

350LNN475

A and B

45.4 (1.80)

380 (15.0)

350LNN575

41.2 (1.60)

350LNN725

48.0 (1.90)

350LNN900

33.0 (1.30)

400LNN600

46 (1.80)

420 (16.5)

400LNN600

45 (1.77)

400LNN725

53.3 (2.10)

400LNN725

45 (1.77)

400LNN800

50 (1.97)

470 (18.5)

400LNNA875

40 (1.57)

440 (17.3)

0.34 (0.013)

400LNN900

45.7 (1.80)

400LNN925

50 (1.97)

496 (19.5)

0.3 (0.012)

500LNN600

60 (2.36)

440 (17.3)

500LNN650

61 (2.40)

470 (18.5)

500LNN650

55 (2.16)

500LNN650

61 (2.4)

500LNN700

48.3 (1.90)

440 (17.3)

500LNN775

53.3 (2.10)

500 (19.7)

0.34 (0.013)

500LNN775

49 (1.93)

500LNN775

50 (1.97)

500LNN950

63.5 (2.50)

500LNN1000

45 (1.77)

500LNN1150

40.6 (1.60)

500LNN1250

37 (1.45)

600LNN750

80 (31.5)

564 (22.2)

0.45 (0.018)

600LNN750

70 (2.75)

600LNN950

A and C

68.6 (2.70)

620 (24.4)

600LNN975

71.1 (2.80)

564 (22.2)

600LNN975

60 (2.36)

600LNN1200

61 (2.40)

582 (22.9)

600LNN1200

50 (1.97)

600LNN1200

55 (2.16)

700LNN1225

88.9 (3.50)

700 (27.6)

700LNN1225

70 (2.75)

700LNN1225

60 (2.36)

900LNN1200

100 (3.94)

866 (34.1)

1000LNN750

85 (3.35)

658 (25.9)

0.55 (0.022)

1000LNN750

90 (3.54)

1000LNN800

80 (3.15)

0.5 (0.197)

3.3.5 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.

3.3.6 Stuffing box housing

The stuffing box housing has a spigot (rabbet) fit between the pump casing and bearing housing for optimum concentricity. The design enables 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.

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.

3.4 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

3.4.2 Pump and impeller data

* Subject to written agreement from Flowserve.

Page 12 of 56 flowserve.com

typically 50 to 65% of those for the standard metallic rings shown

Clearances for non-metallic wear rings are smaller,

above.

LNN, LNNV, LNNC USER INSTRUCTIONS ENGLISH 71569074 06-14

3.4.3 Energy efficient operation of pumps

The pump supplied will have been selected from

Flowserve’s extensive product line to have optimum

efficiency for the application. If supplied with an electric motor then the motor will meet or exceed current legislation for motor efficiency. However it is the way the pump is operated which has the greatest impact on the amount and cost of energy used during the operating life of the pump. The following are key points in achieving minimum operating cost for the equipment:  Design the pipe system for minimum friction

losses

 Ensure that the control system switches off the

pump when not required

 In a multi-pump system run the minimum number

of pumps

 Try to avoid systems which by-pass excess flow  Avoid as far as possible controlling pump flow by

throttle valves

 When commissioned, check that the pump

operates at the duty specified to Flowserve

 If it has been found that the pump head and flow

exceed that required, trim the pump impeller diameter

 Ensure that the pump is operating with sufficient

NPSH available

 Use variable speed drives for systems which

require variable flow. A VFD for an induction motor is a particularly effective way of achieving speed variation and energy/cost reduction

 Notes for VFD usage:

o Make sure that the motor is compatible with VFD o Do not over-speed the pump without checking

the power capability with Flowserve

o On systems with high static head, speed

reduction is limited. Avoid running the pump at a speed which gives low or zero flow

o Do not run at a low speed and flow rate which

lets solids settle out of suspension in the pipe work

o Do not use a VFD for a fixed flow requirement;

it will introduce power losses

 Select high efficiency motors  If replacing a standard motor with a high efficiency

motor it will run faster and the pump could take more power. Reduce the impeller diameter to achieve energy reduction

 If the pump system pipe work or equipment is

changed or process duty is changed, check that the pump is still correctly sized

 Periodically check that the pipe system has not

become corroded or blocked

 Periodically check that the pump is operating at

the flow, head and power expected and that the efficiency has not reduced with erosion or corrosion damage

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.

4.1 Location

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

Refer to the general arrangement drawing for the pump set.

4.2 Part assemblies

Motors may be supplied loose on LNNV pumps, typically on motor frame sizes 400 and above. It is the responsibility of the installer to ensure that the motor is assembled to the pump and lined up as detailed in section 4.5.2, Alignment methods.

4.3 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.)

b) Install the baseplate onto packing pieces evenly

spaced and adjacent to foundation bolts.

c) Level with shims between baseplate and packing

pieces.

Page 13 of 56 flowserve.com

LNN, LNNV, LNNC USER INSTRUCTIONS ENGLISH 71569074 06-14

Pa ra lle l

An gu lar

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) Vertical pumps should be mounted following the

practices outlined for baseplate mounted pumps. (Larger sizes may need the motor fitting after installing the pump - refer to section 4.5.2.)

f) If the pump is driven via a universal joint drive

shaft there may be a requirement to offset the pump shaft with respect to the driver to optimize the universal joint drive shaft bearing life. This offset will typically be in the range 0 to 4 degrees depending on shaft design. Please consult the separate User Instructions before installation.

g) Any support for the universal joint drive shaft

plummer blocks must not exhibit resonant frequencies in the range 0.8 to 1.2 N where N = pump running speed.

h) If not supplied, guarding shall be fitted as

necessary to meet the requirements of ISO 12100 and EN953 and or any applicable local safety regulations.

4.4 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.

4.5 Initial alignment

4.5.1 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.

4.5.2 Alignment methods

Pump and driver must be isolated

electrically and the half couplings 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.

Horizontal pumps – LNN and LNNC

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. Alignment can be achieved by use of the motor adjusters if fitted.

Vertical pumps – LNNV

Adding or removing shims between the motor stool and the pump casing achieves alignment. The motor/motor stool assembly may also have to be moved horizontally at the interface with the pump casing, as required.

On the frame mounted pumps angular alignment is achieved by adding correctly sized shims to between the motor stool and frame.

It should be noted that if the motor has a spigot (rabbet) fit into the motor stool then it is not possible to achieve any horizontal movement at this interface.

For couplings with narrow flanges use a dial indicator as shown below to check both parallel and angular alignment. The alignment values are maximums for continuous service.

Maximum permissible misalignment at working temperature:

Parallel 0.2 mm (0.008 in.) TIR Angular 0.1 mm (0.004 in.) TIR

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

then horizontally by moving motor.

Page 14 of 56 flowserve.com

LNN, LNNV, LNNC USER INSTRUCTIONS ENGLISH 71569074 06-14

While the pump is capable of operating with the maximum misalignment shown above, maximum pump reliability is obtained by near perfect alignment of 0.05 to 0.10 mm (0.002 to 0.004 in.) TIR parallel and

0.05 mm (0.002 in.) per 100 mm (4 in.) of coupling flange diameter as TIR angular misalignment. This covers the full series of couplings available.

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 calipers.

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

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.

If the motor does not run in its magnetic centre the resultant additional axial force may overload the pump thrust bearing.

4.5.3 Check for soft foot

This is a check to ensure that there is no undue stress on the driver holding down bolts; due to nonlevel baseplate or twisting. To check, remove all shims and clean surfaces and tighten down driver to the baseplate. Set a dial indicator as shown in the sketch and loosen off the holding down bolt while noting any deflection reading on the dial test indicator

- a maximum of 0.05 mm (0.002 in.) is considered acceptable but any more will have to be corrected by adding shims. For example, if the dial test indicator shows the foot lifting 0.15 mm (0.006 in.) then this is the thickness of shim to be placed under that foot. Tighten down and repeat the same procedure on all other feet until all are within tolerance.

Complete piping as below and see sections 4.7,

Final shaft alignment check, up to and including section 5, Commissioning, start up, operation and shutdown, before connecting driver and checking actual rotation.

4.6 Piping

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.

4.6.1 Suction and discharge pipe work

Never use the pump as a support for

piping. In order to minimize friction losses and hydraulic

noise in the pipe work it is good practice to choose pipe work that is one or two sizes larger than the pump suction and discharge. Typically main pipe work velocities should not exceed 2 m/s (6 ft/sec) suction and 3 m/s (9 ft/sec) on the discharge.

Take into account the available NPSH which must be higher than the required NPSH of the pump.

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. It is recommended that expansion joints use threaded rod to limit any forces of this type

The tables in 4.6.2 summarize the maximum forces and moments allowed on LNN pump casings. Refer to Flowserve for other configurations.

Ensure piping and fittings are flushed

before use.

Ensure piping for hazardous liquids is arranged

to allow pump flushing before removal of the pump.

Page 15 of 56 flowserve.com

LNN, LNNV, LNNC USER INSTRUCTIONS ENGLISH 71569074 06-14

Type and size

Maximum forces (F) in kN (lbf) and moments (M) in kNm (lbf•ft)

Suction

Discharge

200-LNN-300 to

200-LNN-600

5.34

(1 200)

6.68

(1 500)

4.45

(1 000)

5.02

(3 700)

2.44

(1 800)

3.80

(2 800)

3.78

(850)

4.90

(1 100)

3.12

(700)

3.53

(2 600)

1.76

(1 300)

2.58

(1 900)

250-LNN-325 to

250-LNN-600

6.68

(1 500)

8.01

(1 800)

5.34

(1 200)

6.10

(4 500)

2.98

(2 200)

4.61

(3 400)

5.34

(1 200)

6.68

(1 500)

4.45

(1 000)

5.02

(3 700)

2.44

(1 800)

3.80

(2 800)

300-LNN-325 to

300-LNN-450, 300-LNN-575,

300-LNN-625 and

300-LNN-750

8.46

(1 900)

10.20

(2 290)

6.68

(1 500)

7.32

(5 400)

3.66

(2 700)

5.42

(4 000)

6.68

(1 500)

8.01

(1 800)

5.34

(1 200)

6.10

(4 500)

2.98

(2 200)

4.61

(3 400)

300-LNN-500 and

300-LNN-600

7.12

(1 600)

8.90

(2 000)

5.79

(1 300)

6.37

(4 700)

3.12

(2 300)

4.75

(3 500)

6.68

(1 500)

8.01

(1 800)

5.34

(1 200)

6.10

(4 500)

2.98

(2 200)

4.61

(3 400)

350-LNN-375 to

350-LNN-900

10.70

(2 410)

12.90

(2 900)

8.58

(1 930)

9.12

(6 725)

4.90

(3 615)

6.74

(4 970)

7.12

(1 600)

8.90

(2 000)

5.79

(1 300)

6.37

(4 700)

3.12

(2 300)

4.75

(3 500)

400-LNN-600,

400-LNN-725 and

400-LNN-900

10.32

(2 320)

12.50

(2 810)

8.05

(1 810)

8.71

(6 420)

4.38

(3 230)

6.40

(4 720)

8.45

(1 900)

10.20

(2 290)

6.67

(1 500)

7.32

(5 400)

3.66

(2 700)

5.42

(4 000)

400-LNN-800,

400-LNNA-875 and

400-LNN-925

12.27

(2 760)

14.82

(3 330)

9.47

(2 130)

10.15

(7 490)

5.14

(3 790)

7.40

(5 460)

8.45

(1 900)

10.20

(2 290)

6.67

(1 500)

7.32

(5 400)

3.66

(2 700)

5.42

(4 000)

500-LNN-600 to

500-LNN-1250

12.27

(2 760)

14.82

(3 330)

9.47

(2 130)

10.15

(7 490)

5.14

(3 790)

7.40

(5 460)

10.32

(2 320)

12.50

(2 810)

8.05

(1 810)

8.71

(6 420)

4.38

(3 230)

6.40

(4 720)

600-LNN-750

15.21

(3 420)

18.29

(4 110)

11.60

(2 610)

12.30

(9 070)

6.28

(4 630)

8.90

(6 560)

12.27

(2 760)

14.82

(3 330)

9.47

(2 130)

10.15

(7 490)

5.14

(3 790)

7.40

(5 460)

600-LNN-950

16.19

(3 640)

19.45

(4 370)

12.31

(2 770)

13.01

(9 600)

6.66

(4 910)

9.40

(6 930)

12.27

(2 760)

14.82

(3 330)

9.47

(2 130)

10.15

(7 490)

5.14

(3 790)

7.40

(5 460)

600-LNN-975 and

600-LNN-1200

14.23

(3 200)

17.14

(3 850)

10.89

(2 450)

11.58

(8 540)

5.90

(4 350)

8.40

(6 200)

12.27

(2 760)

14.82

(3 330)

9.47

(2 130)

10.15

(7 490)

5.14

(3 790)

7.40

(5 460)

700-LNN-1100 700-LNN-1300

20.10

(4 519)

24.08

(5 413)

15.15

(3 406)

15.88

(11 712)

8.18

(6 033)

11.40

(8 408)

14.23

(3 199)

17.14

(3 853)

10.89

(2 448)

11.58

(8 541)

5.90

(4 352)

8.40

(6 196)

700-LNN-1225

18.14

(4 080)

21.77

(4 890)

13.73

(3 090)

14.45

(10 660)

7.42

(5 470)

10.40

(7 670)

14.23

(3 200)

17.14

(3 850)

10.89

(2 450)

11.58

(8 540)

5.90

(4 350)

8.40

(6 200)

800-LNN-1125

24.04

(5400)

28.72

(6460)

17.99

(4040)

18.75

(13830)

9.7

(7150)

13.4

(9880)

16.19

(3640)

19.45

(4370)

12.31

(2770)

1301

(9600)

6.66

(4910)

9.4

(6930)

900-LNN-675

18.14

(4080)

21.77

(4890)

13.73

(3090)

14.45

(10660)

7.42

(5470)

10.4

(7670)

18.14

(4080)

21.77

(4890)

13.73

(3090)

14.45

(10660)

7.42

(5470)

10.4

(7670)

900-LNN-1200

24.01

(5 400)

28.72

(6 460)

17.99

(4 040)

18.75

(13 830)

9.70

(7 150)

13.40

(9 880)

18.14

(4 080)

21.77

(4 890)

13.73

(3 090)

14.45

(10 660)

7.42

(5.470)

10.40

(7 670)

1000-LNN-750 and

1000-LNN-800

20.10

(4 520)

24.08

(5 410)

15.15

(3 410)

15.88

(11 710)

8.18

(6 030)

11.40

(8 410)

20.10

(4 520)

24.08

(5 410)

15.15

(3 410)

15.88

(11 710)

8.18

(6 030)

11.40

(8 410)

1000-LNN-825

24.04

(5400)

28.72

(6460)

17.99

(4040)

18.75

(13830)

9.7

(7150)

13.4

(9880)

20.1

(4250)

24.08

(5410)

15.15

(3410)

15.88

(11710)

8.18

(6030)

11.4

(8410)

4.6.2 Maximum forces and moments allowed on pump flanges

4.6.2.1 LNN, LNNV maximum forces and moments allowed

For load and momentum orientation, see following page. Notes: see end of section 4.6.2.2.

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LNN, LNNV, LNNC USER INSTRUCTIONS ENGLISH 71569074 06-14

Discharge

Suction

Pump

axis

Type and size

Maximum forces (F) in kN (lbf) and moments (M) in kNm (lbf•ft)

Suction

Discharge

300-LNNC-475

and

300-LNNC-575

8.46

(1 900)

10.20

(2 290)

6.68

(1 500)

7.32

(5 380)

3.66

(2 690)

5.42

(3 990)

6.68

(1 500)

8.01

(1 800)

5.34

(1 200)

6.10

(4 490)

2.98

(2 190)

4.61

(3 390)

300-LNNC-500

7.12

(1 600)

8.90

(2 000)

5.79

(1 300)

6.37

(4 690)

3.12

(2 300)

4.75

(3 490)

6.68

(1 500)

8.01

(1 800)

5.34

(1 200)

6.10

(4 490)

2.98

(2 190)

4.61

(3 390)

350-LNNC-475 to

300-LNNC-900

10.70

(2 400)

12.90

(2 890)

8.58

(1 920)

9.12

(6 710)

4.90

(3 600)

6.74

(4 960)

7.12

(1 600)

8.90

(2 000)

5.79

(1 300)

6.37

(4 690)

3.12

(2 300)

4.75

(3 490)

600-LNNC-950

17.10

(3 840)

20.40

(4 580)

14.00

(3 140)

14.20

(10 450)

8.44

(6 210)

10.40

(7 650)

12.90

(2 890)

15.60

(3 500)

10.50

(2 360)

10.90

(8 020)

6.14

(4 520)

8.05

(5 920)

600-LNNC-975

14.90

(3 340)

17.80

(3 990)

12.10

(2 710)

12.40

(9 120)

7.22

(5 310)

9.14

(6 720)

12.90

(2 890)

15.60

(3 500)

10.50

(2 360)

10.90

(8 020)

6.14

(4 520)

8.05

(5 920)

700-LNNC-1225

19.30

(4 330)

23.00

(5 160)

15.90

(3 570)

15.90

(11 700)

9.65

(7 100)

11.70

(8 610)

14.90

(3 340)

17.80

(3 990)

12.10

(2 710)

12.40

(9 120)

7.22

(5 310)

9.14

(6 720)

DISCHARGE

SUCTION

PUMP

AXIS

Load and momentum orientation of LNN and LNNV pumps

4.6.2.2 LNNC maximum forces and moments allowed

Load and momentum orientation of LNNC pumps

Notes:

1) F = External force (tension or compression).

M = External moment, clockwise or counter-clockwise. Sign convention follows ISO 1503 and ISO 13709/API610.

2) Forces and moments may be applied simultaneously in any

direction.

3) Values apply to all materials.

4) The nozzle loads applied to the pump flanges must not exceed

the values given in tables 4.6.2.1 and 4.6.2.2

5) Higher loads may be applicable, if direction and magnitude of

individual loads are known, but these need written approval from Flowserve.

6) The pump nozzle is not to be used as a rigid support for the

piping line.

7) The piping loads applied to the pump flanges can be minimized

using the appropriate piping line supports.

8) The suction and discharge piping lines must not be connected

to the pump nozzle with an expansion joint (or similar flexible pipes), unless they are rigidly blocked with tie rods.

9) Pumps must be on rigid foundations and baseplates must be fully grouted.

10) Pump/baseplate should not be used as pipe anchor.

11) Suction and discharge piping should be anchored as close as

possible to the pump flanges to reduce vibration and prevent strain on the pump casing. Expansion joints are recommended. They must be properly tied and located on the side of the pipe anchor away from the pump.

12) The pump mounting bolt torques specified must be used to

prevent relative movement between the pump casing and baseplate. (See section 6.6, Fastener torques.) The bolt material must have a minimum yield strength of 600 N/mm2 (87 000 lb/in.2).

Failure to complying with the above can result in damage to the pump.

Page 17 of 56 flowserve.com

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