Flowserve MNV User Manual

Download

Pump Division

Types: MNV and MNZ

(Vertical long shafted)

CENTRIFUGAL PUMPS

USER INSTRUCTIONS:

INSTALLATION, OPERATION, MAINTENANCE

PCN = 71569188 11- 04 (E) (incorporating MNV/MNZ.IOM)

These instructions should be read prior to installing

operating, using and maintaining this equipment.

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

CONTENTS

PAGE

CONTENTS............................................................... 2

1 INTRODUCTION AND SAFETY........................... 3

1.1 General ...........................................................3

1.2 CE marking and approvals..............................3

1.3 Disclaimer .......................................................3

1.4 Copyright......................................................... 3

1.5 Duty conditions ...............................................3

1.6 Safety..............................................................4

1.7 Nameplate and warning labels .......................8

1.8 Noise level ......................................................9

1.9 Specific machine performance......................10

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

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

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

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

2.4 Storage..........................................................11

2.5 Recycling and end of product life.................. 12

3 DESCRIPTION .................................................... 12

3.1 Nozzle configurations....................................13

3.2 Name nomenclature......................................14

3.3 Design of major parts.................................... 14

3.4 Performance and operating limits................. 15

4 INSTALLATION................................................... 16

4.1 Location ........................................................16

4.2 Part assemblies ............................................16

4.3 Foundation.................................................... 16

4.4 Grouting ........................................................17

4.5 Initial alignment............................................. 18

4.6 Piping ............................................................ 19

4.7 Electrical connections ................................... 21

4.8 Final shaft alignment check ..........................21

4.9 Protection systems........................................21

5 COMMISSIONING, START-UP, OPERATION AND

SHUTDOWN.................................................... 22

5.1 Pre-commissioning procedure...................... 22

5.2 Pump Lubrication.......................................... 22

5.3 Impeller clearance.........................................24

5.4 Direction of rotation.......................................24

5.5 Guarding .......................................................25

5.6 Priming and auxiliary supplies ......................25

5.7 Starting the pump..........................................25

5.8 Running or operation ....................................26

5.9 Stopping and shutdown.................................28

5.10 Hydraulic, mechanical and electrical duty... 28

6 MAINTENANCE .................................................. 28

6.1 Maintenance schedule.................................. 29

6.2 Spare parts....................................................35

6.3 Suggested spares and consumable items.... 36

6.4 Tools required ............................................... 36

6.5 Fastener torques...........................................36

6.6 Renewal clearances......................................36

PAGE

6.7 Disassembly ..................................................37

6.8 Examination of parts......................................39

6.9 Assembly.......................................................40

7 FAULTS; CAUSES AND REMEDIES..................41

8 PARTS LIST AND DRAWINGS...........................43

8.1 MNV cross section and parts list...................43

8.2 MNZ cross section and parts list ...................45

9 CERTIFICATION .................................................46

10 OTHER RELEVANT DOCUMENTATION AND

MANUALS........................................................46

10.1 Supplementary user instructions.................46

10.2 Change notes ..............................................46

INDEX

PAGE Alignment of shafting (see 4.3, 4.5 and 4.7)

CE marking and approvals (1.2) ................................3

Clearances (see 6.6, Renewal clearances) .............36

Commissioning and operation (see 5) .....................22

Configurations (3.1)..................................................13

Direction of rotation (5.4)..........................................24

Dismantling (see 6.7, Disassembly).........................37

Duty conditions (1.5) ..................................................3

Electrical connections (4.7)......................................21

Examination of parts (6.8)........................................39

Faults; causes and remedies (7.0)...........................41

General assembly drawings (see 8) ........................43

Grouting (4.4)...........................................................17

Guarding (5.5)..........................................................24

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

Hydraulic, mechanical and electrical duty (5.10) .....28

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

Location (4.1) ...........................................................16

Lubrication schedule (see 5.2, Pump lubricants).....22

Maintenance schedule (6.1).....................................29

Piping (4.6)...............................................................19

Priming and auxiliary supplies (5.6).........................25

Reassembly (see 6.9, Assembly) ............................40

Replacement parts (see 6.3 and 6.4).......................36

Safety, protection systems (see 1.6 and 4.9)

Sound level (see 1.8, Noise level) .............................9

Specific machine performance (1.9) ........................10

Starting the pump (5.7) ............................................25

Stopping and shutdown (5.9)...................................26

Storage (2.4) ............................................................11

Supplementary user instructions (10.1) ...................46

Tools required (6.4)..................................................36

Torques for fasteners (6.5) ......................................36

Page 2 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

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, utilizing 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 Pump Division 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 organizations. 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 authorized Flowserve parts and accessories is considered to be misuse. Damage or failure caused by misuse is not covered by Flowserve's warranty. In addition, any modification of Flowserve products or removal of original components may impair the safety of these products in their use.

1.4 Copyright

1.5 Duty conditions

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

The product must not be operated beyond

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

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

Page 3 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

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

1.6.2 Personnel qualification and training

All personnel involved in the operation, installation, inspection and maintenance of the unit must be qualified to carry out the work involved. If the personnel in question do not already possess the necessary knowledge and skill, appropriate training and instruction must be provided.

If required the operator may commission the manufacturer/supplier to provide applicable training.

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

1.6.3 Safety action

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

NEVER DO MAINTENANCE WORK

WHEN THE UNIT IS CONNECTED TO POWER

GUARDS MUST NOT BE REMOVED WHILE

THE PUMP IS OPERATIONAL

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

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

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

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

APPLYING HEAT TO REMOVE IMPELLER There may be occasions when the impeller has either been shrunk fit onto the pump shaft or has become difficult to remove due to products that are corrosive in nature.

If you elect to use heat to remove the impeller, it must be applied with a great care and before applying heat ensure any residual hazardous liquid trapped between the impeller and pump shaft is thoroughly drained out through the impeller keyway to prevent an explosion or emission of toxic vapor.

Impeller design vary and so are the heat, applying location and the duration of heat application. Contact your nearest Flowserve service center for help.

Page 4 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

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.

Bearing housings must not be insulated to

avoid drive motor and bearing heat up.

If the temperature is greater than 68 °C (175 °F) or below 5 °C (20 °F) in a restricted zone, or exceeds local regulations, action as above shall be taken.

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

Gland packing must not be used when pumping hazardous liquids.

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

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

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

NEVER RUN THE PUMP DRY

INLET VALVES TO BE FULLY OPEN WHEN PUMP IS RUNNING Running the pump at zero flow or below the recommended minimum flow continuously will cause damage to the 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 backpressure on the pump may overload the motor and cause cavitation. Low flow rates may cause a reduction in pump/bearing life, overheating of the pump, instability and cavitation/ vibration.

1.6.4 Products used in potentially explosive atmospheres

Measures are required to:

• Avoid 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

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 affects in the motor and 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.

Page 5 of 47

Temperature

class to

prEN 13464

Temperature limit of liquid

handled (* depending on

material and construction

variant

lower)

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

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 prEn13463-5)

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.

Maximum

T6 T5 T4 T3 T2 T1

surface temperature

-5 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)

- check which is

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 hazarous 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.

Wherever 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, fitting of an appropriate dry run protection device is recommended.

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

Page 6 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

1.6.4.5 Preventing sparks

To prevent a potential hazard from mechanical contact, the coupling guard must be non-sparking and anti-static for Category 2.

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 non-metallic surfaces with a dry cloth; ensure cloth is damp.

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

1.6.4.6 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

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

a) Any auxillary systems installed must be

monitored, to ensure they function correctly.

b) Gland packings must be adjusted correctly to

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

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

correct functioning of the shaft seal must be checked regularly.

d) Chck bearing lubricant level,and verify if the

hours run show a lubricant change is required.

e) Check the duty condition is in the safe operating

range for the pump.

f) Check vibration, noise level and surface

temperarture at the bearings to confirm satisfactory operation.

g) Check that dirt and dust are removed from areas

around close clearances, bearing housings and motors.

h) Check coupling alignment and re-align if

necessary.

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.

Page 7 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

1.7 Nameplate and warning labels

1.7.1 Nameplate

For details of nameplate, see the Declaration of Conformity /Flowserve documentation provided or contact Flowserve for help.

1.7.2 Warning labels

Oil lubricated units only

Page 8 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

1.8 Noise level

Whenever pump noise level exceeds 85 dBA, attention must be given to prevailing Health and Safety Legislation, to limit the exposure of plant operating personnel to the noise. Typical safety level requires to limit the sound level of 90 dBA for 8 hours of exposure and the allowable dBA value increases 5 dBA for each halving of exposure time. The usual approach is to control 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 machines above a certain power level will exceed 85 dBA. In such situations, consideration must be given to the fitting of an acoustic enclosure to meet local regulations.

1.8.1 Typical sound levels for MNV & MNZ pumps

Typical sound pressure levels measured in dB, and are A-weighted.

Motor

Frame

Size.

NEMA

Sound pressure values indicated for the motor are extracted from typical motor manufacturer’s data at no load conditions and are not guaranteed. They may vary depending on the type of motor, enclosure used, and the manufacturer. The sound pressure values for the pump are estimated levels in free field measured 1 meter from the nearest major pump surface and at a height of 1.5 meters above the floor. using speed, flow rate, motor horsepower, number of impeller vanes, and other variables. Therefore values indicated are for reference only and could exceed the estimated values by as much as 8~10 dBA depending upon factors such as installed conditions, building acoustics, foundation, piping, operating conditions, surrounding machinery. It is highly recommended to take actual field measurement of sound pressure values, apply enclosures and safety measures mandated by the local authorities and prevailing safety regulations. For all other pump and motor frame size combinations, the sound levels have to measured and safety measures have to be adopted.

RPM Motor Only

Sound

Pressure

(dBA )

1800 60.0 65 70 180

1200 & slower 55.0 55 63

1800 60.0 65 69 210

1200 & slower 55.0 56 63

1800 70.0 77 77 250

1200 & slower 60.0 68 69

1800 70.0 77 77 280

1200 & slower 60.0 68 69

1800 65.0 77 77 320

1200 & slower 65.0 69 69

1800 65.0 77 78 360

1200 & slower 65.0 68 69

1800 70.0 77 78 400

1200 & slower 65.0 68 69

1800 70.0 77 78 440

1200 & slower 65 68 69

Pump only

Sound

Pressure

(dBA )

Combination of pump and

motor

Sound

pressure

(dBA)



For units driven by equipment other than electric motors or units contained within enclosures, see the

accompanying information sheets and manuals.

Page 9 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

1.9 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. In cases where performance data has been supplied separately to the purchaser these should be obtained and retained with these User Instructions, if required.

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 Pump Division and must be received in writing within one month of receipt of the equipment. Claims made later than this specified time period will not 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 sidewalls 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 forklift vehicles or slings dependent on their size and construction.

2.3 Lifting

2.3.1 Lifting of pump together with the suction elbow/nozzle

(only MNZ configuration is shown in this illustration)

To avoid distortion, the pump unit

should be lifted as shown in sections 2.3.1.

It is strongly recommended to lift the pump using appropriate equipments and proven procedures. It is strongly recommended to employ experts for the task to avoid injury or loss of life.

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

Page 10 of 47

Use stuffing box head and /or lifting eyes (if provided) on the casing for lifting. Make sure to balance the weight such that there is no tilting to any one side.

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

2.3.2 Lifting of driver

Use driver lifting lugs/ or follow driver manufacturer’s User Instructions.

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

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.

2.4.1 Inspection before storage

a) Inspect the preservative coating/painted surfaces

on the various parts. Touch up whereever necessary.

b) Inspect all covers over pump openings and piping

connections. If found damaged, remove the covers and inspect interiors of the opening for any deposits of foreign materials or water.

c) If necessary, clean and preserve the interior parts

as noted above to restore the parts to the "as shipped" condition. Replace covers and fasten securely.

2.4.2 Short term storage (less than 6 months)

When it is necessary to store a pump for a short time before it can be installed, place it in a dry location and protect it thoroughly from moisture.

When protective flanges are bolted to the suction and discharge nozzles at the factory, they should not be removed. Protect the bearings and the shaft against moisture, dirt, or other foreign matter. To prevent rusting in or seizing, lubricate the unit; see Section

5.2, Pump Lubricants. Rotate the pump shaft a minimum of 5 revolutions every two weeks to keep the bearings coated with lubricant and to minimize the effects of brinelling.

MNV and MNZ standard pumps are grease lubricated. Oil lubricated anti-friction bearings are factory lubricated to prevent rusting for a short period of time only. It is important to fill the recommended oil lubricant to proper level immediately upon receiving the equipment.

2.4.3 Long term storage (6 months and over)

More thorough precautions are required if the pump is scheduled to be stored for an extended period of time. Contact Flowserve before long-term storage is attempted for specific storage requirements and warranty information.

The following is a general procedure and could vary depending upon the pump design and specific application.

The storage area should be a clean and dry. The storage location not be subjected to rapid changes in temperature, light (no direct lighting) or humidity, and relatively free of ground transmitted vibration due to heavy construction and/or machinery.

A temperature range of 5 o to 50 oC ( 40 o to 120o F) with non-condensing humidity is recommended.

a) Drain fluid from the pump, rotate the pump rotor

once in the proper direction and blow the liquid end dry with air.

b) Coat the interior surfaces of the liquid end with

rust inhibitor by brushing, spraying or fogging. Rotate the pump shaft one turn in the proper direction while coating.

c) Remove the packing and seal cage from the

stuffing box to prevent corrosion due to condensation. Coat the interior machined surfaces of stuffing box with a rust inhibitor. This step may be omitted if the pumps are stored prior to initial use.

d) For grease lubricated bearing frames, fill the

cavity between the bearing covers and bearings with a good grade of NGLI No. 2 lithium base grease to prevent contamination of the bearings. Ensure the bearings are thoroughly packed with grease. Lubrication quality and quantity must be checked every six months and replaced or replenished as necessary.

e) Coat all threaded openings with rust inhibitor and

plug. Coat machined surfaces of exposed flanges with rust inhibitor and then cover with fiberboard or wood flange covers. Desiccant bags should be secured to the covers prior to putting them in place and must not contact metal surfaces.

f) Coat exposed, unpainted, and machined

surfaces with a rust inhibitor.

Page 11 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

g) Cover openings in the stuffing box head between

the casing and bearing frame with plastic, taped in place, to prevent entrance of contaminants into the stuffing box and line bearing area.

h) Cover the entire pump with a clear plastic sheet

for protection from dust, dirt moisture, etc. and to allow for visual inspection. The cover should be open near the top to allow for ventilation.

i) Rotate the pump shaft a minimum of 5

revolutions every two weeks to keep the bearings coated with lubricant and to minimize the effects of brinelling.

j) Refer to the vendors instruction manuals for

extended storage procedure for motors, controls, coupling, etc.,

Prior to start up or installation, an Flowserve representative should be hired to inspect all equipment to determine if any damage or deterioration of parts has occurred and that the equipment is in "as shipped" condition.

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.

• Pump type MNV (with the suction elbow)

• Pump type MNZ (with the suction nozzle)

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 DESCRIPTION

The MNV/MNZ type pumps are single stage, volute type, dry pit, centrifugal pumps designed for handling sewage, storm water, dry dock and industrial waste applications with end suction side discharge mix flow non-clog design.

It should be noted that unscreened raw sewage may introduce some chances of clogging and therefore clogging may be totally avoided, if appropriate level of screening is applied.

These are end suction side discharge mix flow nonclog pump. The information contained in this book covers long shafted pumps where the pump and driver are installed separately connected by one or multiple shafting using universal joints (some exceptional cases may have rigid or geared couplings). Type MNV is fitted with a suction elbow and MNZ with a suction nozzle.

Page 12 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

3.1 Nozzle configurations

The MNV and MNZ pumps are configured with various nozzle positions, designated A-H as shown (Example: for counter clock-wise rotation).

3.1.1 Long shafting with U-joints.

(Example shown is MNZ pump assembly).

Shaft guards are supplied if ordered. It is the responsibility of the operators of drive shaft and universal joints to provide and install guards or safety devices, which may be required by recognized safety standards.

GUARD

SHAFT GUARD

U SHAFTING

TUBING

Page 13 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

3.2 Name nomenclature

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

24-MNV/MNZ-47

Nominal discharge branch size.

Type/Configuration – see sec. 3.0.

Nominal impeller diameter. (Size in inches only)

The typical nomenclature above is the general guide to the MNV/MNZ 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 & stuffing box head

The pump casing with its integrally cast discharge nozzle is of the volute type. It is machined to provide a rabbet fit for the stuffing box head and suction head. The heads are removable and are bolted to and centered in the casing. The casing and suction head are each provided with one hand hole for inspection and cleaning of the pump without dismantling. The pump has its main casing gasket axial to the shaft allowing maintenance to the rotating element by separating the impeller assembly from the casing. Suction and discharge branches remain undisturbed

3.3.2 Impeller and wearing rings

The impeller is a solids handling type capable of passing trash and solids of limited size. The impeller hub is keyed to the shaft and held in position by an impeller nut which is set screwed to the impeller to prevent its backing off. A pair of replaceable wearing rings (optional) between the rotating impeller and the stationary suction head are provided for impeller wear resistance.

3.3.2.1 Impeller and wearing ring arrangement

IMPELLER

IMPELLER WEARING RING

SUCTION HEAD

WEARING RING

SUCTION HEAD

3.3.3 Shaft and shaft sleeve

The pump shaft is sized to transmit the rated loads encountered with liberal safety factors, and is accurately machined over its full length. Generous fillets are used to minimize stress concentrations. It is protected from wear at the stuffing box by a removable shaft sleeve.

3.3.4 Pump bearings and lubrication

MNV & MNZ pumps are equipped with anti-friction bearings of the tapered roller type. The line and thrust bearings are arranged in opposed mounting and can be furnished with grease as standard and custom built oil lubricated pumps.

3.3.5 Bearing housing

Bearings are mounted in a removable cast iron bearing frame. The frame casting offers solid support and location to the bearings and two grease nipples enable grease lubricated bearings to be replenished between major service intervals.

3.3.6 Stuffing box housing

The stuffing box housing cast integrally with the back head and has designed number of sealing options. For applications requiring Mechanical Seals refer to the Mechanical Seal Manufacturer's instructions.

Packing within the pump stuffing box seals the pump against leakage along the shaft at the point where it passes through the stuffing box. It should be packed with rings of braided, non-asbestos packing and a seal cage. It is equipped with a split removable packing gland.

Page 14 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

The number of packing rings list is provided in section 6.1.8.1. Place two rings of packing below the seal cage and the remaining rings above the seal cage.

PACKING GLAND

SEAL WATER CONNECTION

SEAL CAGE

PACKING

SHAFT SLEEVE

PUMP SHAFT

STUFFING BOX HEAD

IMPELLER

The stuffing box is not packed when

the pump is shipped.

A water supply of approximately 0.113 to 0.227 m3/h (0.5 to 1.0 gpm) is to be introduced to the seal water connection to provide for packing lubrication and sealing. A steady "trickle" of water from the stuffing box will indicate proper adjustment. The sealing water supply pressure should be 0.35 to 0.69 bar (5 to 10 psi) above the pump discharge pressure. When grease sealing is used, a similar grease pressure should be maintained. A slight leakage of liquid from the stuffing box is to be expected and the gland MUST NOT be tightened to the point of stopping the leakage.

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. See section 6.1.9 for mechanical seal maintenance information.

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. All metal flexible couplings are normally used for connecting pump and drive shafts. For operating instructions, refer to the coupling manufacturer's User Instructions.

3.3.9 Intermediate shafting

Steel flexible shafting with universal joint couplings is usually used with MNV/MNZ pump installations. For operating instructions, refer to the U shaft manufacturer's User Instructions. See below for illustrations of driver and intermediate U-joint shafting.

3.3.10 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

Pumped liquid temperature limits*

Maximum ambient temperature*

Maximum pump speed refer to the nameplate

*Subject to written agreement from Flowserve. Special designs and materials may be available for pumps operating above and below these specified limits. Contact Flowserve for upgrade options available for your specific application.

3.4.2 Pump and impeller data

Details of impeller diameter (trim), wearing ring diameter, are normally provided with the pump along with the test curve data. If not found with the pump, please contact Flowserve representative.

5 ºC (40 ºF) to +80 ºC (176 ºF)

5 ºC (40 ºF) to +40 ºC (104 ºF)

Page 15 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

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.

Inspection prior to installation: Six months prior to the scheduled installation date, a Flowserve Pump Division representative is to be employed to conduct an inspection of the equipment and the facility. If any deterioration of equipment is noticed, the Flowserve Pump Division representative may require a partial or complete dismantling of the equipment including restoration and replacement of some components.

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.

4.1.1 General installation check-list

The following checks should be made before starting actual installation.

a) Make sure that the motor nameplate ratings and

the power supply system match correctly.

b) Check the sump depth and suction pipe length

match up. c) Check the liquid level in the sump. d) Check the installation equipment to be sure that it

will safely handle the pump weight and size. e) Check all pump connections (bolts, nuts etc) for

any shipping and handling related problems. f) Check for any evidence of lubricant leakage at

the bearings. g) Check that the shaft rotates freely.

4.1.2 Cleaning prior to installation

Remove the rust inhibitor, flange protectors, plastic covers, desiccant, and inspect the inside of the pump. Repack the stuffing box and ensure that the stuffing box drain is clear. Flush the bearings using a hot, light oil at 82o to 93oC (180o to 200o F) while the shaft is slowly rotated. Re-lubricate the bearings as explained in Section 5.0

4.1.3 Manufacturer’s service

It is recommended that the services of Flowserve Company Service Representative be employed for installing and starting the pump as proper installation is vital for designed functioning, performance and reliability of the equipment.

4.1.4 Site preparation

Care should be taken to prevent an out of service pump from freezing during cold weather. Draining the pump is recommended when there is any possibility of freezing.

Observe extreme caution when priming, venting and draining hazardous liquids. Wear protective clothing in the presence of hazardous, caustic, volatile, flammable and hot liquids. Do not breathe toxic vapors. Do not swallow. Do not allow sparking, flames or hot surfaces in the vicinity of the equipment.

4.1.5 General tools required for installation

a) Mobile crane capable of hoisting and lowering the

pump and/or motor.

b) Sets of chains, tongs and cable slings for

attaching it to the pump and motor lifting eyes.

c) General purpose hand tools, pipe wrenches, end

wrenches, socket set, screwdrivers, Allen wrenches, wire brush, scraper and fine emery cloth.

d) Thread sealing compound designed for stainless

steel and light machinery oil.

4.2 Part assemblies

Motors are supplied separately for MNV/MNZ pumps. 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. It is also the responsibility of the installer to take note of the pump and driver weights for proper handling before assembly is attempted.

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 limitations on its noise/vibrations. 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.

The foundation may consist of material that will afford permanent, rigid support to the discharge head and will absorb expected stresses that may be encountered in service.

Concrete foundations should have anchor bolts installed in sleeves that are twice the diameter of the bolt to allow alignment and has holes in the mounting plate as illustrated in the detail below.

Page 16 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

The foundation should be of sufficient strength to absorb vibration (i.e., at least five times the weight of the pump unit) and to form a permanent, rigid support for the suction nozzle/steel frame support. This is important in maintaining the alignment of a close coupled unit. A concrete foundation on a solid base should be satisfactory.

4.3.1 Pump and structural natural frequency

Pump manufacturers can calculate or determine the natural frequency of the pump assembly, including the driver. However, in a field installation, the vibrating structure comprises, in addition to the pump assembly, the foundation, the mounting, the piping, and supports. The natural frequency of the vibrating structure is determined by the stiffness of the total structure and by its equivalent mass. The natural frequency of the structure may therefore differ significantly from the natural frequency of the pump.

In the absence of any specific information, the pump manufacturer will assume that the piping is installed rigidly and anchored close to the pump connections.

It will also be assumed that the hold down bolts are securely embedded in a concrete foundation of infinite mass and rigidity.

The system designer must give proper consideration and must ensure that the natural frequency of the vibrating structure, as defined above, does not fall within the pump operating speed range. That person also must be aware of the much lower stiffness of fabricated system structures, relative to concrete, and the problems associated with calculating stiffness of unconventional and composite structures.

4.4 Grouting

The pump and motor must be aligned on the base prior to grouting the base in place (see alignment). To do otherwise will negate the factory pre-alignment and may result in alignment difficulties at the expense of others. Where applicable, grout in the foundation bolts.

Grouting provides solid contact between the pump unit and foundation, prevents lateral movement of running equipment and dampens resonant vibrations.

4.4.1 Typical foundation bolt arrangement

Foundation bolts of the specified size should be embedded in concrete and located according to the Elevation drawing. Each bolt should be surrounded by a pipe sleeve at least two times the diameter of the bolt. The sleeve should be held rigidly yet

allowing the bolts to be moved to conform to the holes in the baseplate as shown in the detail under this section.

PUMP FOOT

(IF SOLE PLATE IS USED)

SHIMS

FOUNDATION

GROUT

SLEEVE

PUMP FOOT OR SOLE PLATE

FOUNDATION BOLT

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

Only non-shrinking grout with a 41.4 Mpa (6000 psi) compressive strength in 72 hours should be used. Flowserve recommends the following procedure for grouting.

4.4.2 Recommended procedure for grouting

a) Build a wooden form around the outside of the

base to contain the grout. In some cases the form is placed tightly against the lower edge of the base and in other cases it is placed a slight distance from the edge of the pump base.

b) Saturate the top of the rough concrete foundation

with water, if required before grouting. Add grout until the entire area under the pump base is filled, including the space between the foundation bolt and pipe sleeve. A stiff wire should be used to work the grout and release any air pockets.

c) After the grout is poured, the exposed surfaces

should be covered with wet burlap to effect slow curing and prevent cracking. When the grout is set (about 48 hours) remove the forms and smooth the exposed surfaces if desired. The grout should be allowed to cure at least 72 hours before dynamically loaded.

If leveling nuts are used on the foundation bolts to level the base, they must be backed off as far as possible prior to grouting the base in place. Shim near the foundation bolts, back off the leveling nuts, and tighten the foundation bolts. To do otherwise will significantly lower the structural natural frequency and result in separation of the base from the grout.

Page 17 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

4.5 Initial alignment

Ensure pump and driver are isolated

electrically and the half couplings are disconnected.

MNV/MNZ pumps are shipped from the factory without the line shaft, pump or motor couplings mounted. The couplings are mounted in the field. Refer to the shafting manufacturer’s instruction manual to determine the type of coupling supplied with your unit.

Mount interference fit couplings by heating them evenly in an oven to approximately 135 oC (275 oF). This is required as the coupling flanges are designed for an interference fit per AGMA Standard 9002. Do not alter this fit. Upon removal from the oven, position the hubs on the shafts, as required.

DO NOT hammer on the flanges in an attempt to remove them from the shaft. To do so will permanently damage the bearings in the pump and/or the motor. Interference fit couplings have to be removed by applying heat and a puller. The alignment must be checked after the pump is completely piped up.

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

Ensure pump and driver are isolated

electrically and the couplings are 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.

4.5.3 Alignment Procedure

a) Set the pump with its support on the foundation.

Use shims to level and raise the pump in a vertical direction. Ensure that the suction and discharge flanges are level, plumb, and at the proper elevation.

b) Place the motor on the motor base. Move and

shim beneath the motor base as necessary to ensure that:

• The distance from the motor coupling to the pump coupling is correct

• The motor to pump coupling offset is that required to produce the correct misalignment

• The motor coupling and pump coupling are level to one another

c) Tighten the motor base foundation bolts and

recheck the span, offset, and coupling level. Grout the base in place.

d) Set the motor to pump coupling offset by sliding

the motor on the base. e) Secure the motor to the motor base. f) Install the intermediate shafting with the guide

bearing(s) in place. If more than one section of

the shaft is used. Check the shafting alignment.

The universal joints must be placed so that the yoke ears on each section of shaft are in line with one another. If the yoke ears are not aligned, equipment vibration will be increased.

All the shafting misalignment must occur in one plane; i.e., if the shafting were placed on a sheet of paper, all of the sections must contact the paper along their length with no sections protruding out of the paper.

g) Align the guide bearings to the shaft by shimming

beneath the guide bearing as necessary. Secure the guide bearings to the foundation. Recheck the guide bearing and shafting alignment.

h) Tighten the pump foundation bolts and grout the

pump in place. Dowel the motor to the motor base (two dowels diagonally opposed), and recheck alignment.

Due to the many variations and complexity of installations, it is recommended that a Flowserve Pump Division Service Representative be hired to assist in installation and alignment on long shafted vertical units.

Page 18 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

4.5.4 Alignment criteria

Accurate alignment of pump and drive shafts is essential for successful operation. Misalignment values as near to zero tolerance as possible are required for trouble free operation and long equipment life.

Universal joints are used to compensate for slight changes in alignment that occur during normal operation. It is not used to correct for initial misalignment in excess of the values herein. Although most couplings can withstand greater misalignment, such can cause excessive vibration and premature equipment failure. Driver and driven coupling faces must be parallel to each other within one degree.

An offset not exceeding 3.2 mm (0.125 in.) to 4.8 mm (0.187 in.) per foot is recommended. Although universal joint type shafting will withstand much greater misalignment, such can cause excessive vibration as well as premature failure of the equipment. Note that a small misalignment is required to lubricate the universal joint bearings that use needle bearings.

Steady Bearing centerlines are to be concentric with the center line of the shaft to within one degree.

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.

Complete piping as below and see section 4.8,

Final shaft alignment, 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 Pipework velocities

In order to minimize friction losses and hydraulic noise in the pipe work, it is a 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 that must be higher than the required NPSH of the pump.

Never use the pump as a support for piping.

4.6.1.1 Piping strains

Pipe strains are a common cause of misalignment, hot bearings, worn couplings, and vibration.

Satisfactory operation cannot be maintained when the piping imposes a force on the pump. Misaligned piping flanges can spring and pull a pump out of position when their bolts are drawn up.

Flanges must have flat faces and be brought squarely together before the bolts are tightened.

To avoid breaking the flanges when tightening the bolting, mating pipe flanges should also have flat faces and full face gaskets should be used.

Suction and discharge pipes, and associated equipment, should be supported and anchored near, but independent of the pump so that no strain will be transmitted to the pump casing.

Pipe couplings that are not axially rigid are sometimes used in the discharge and/or suction piping to avoid transmitting any piping strains caused by system pressure, thermal expansion or pipe misalignment. Such pipe couplings allow transmittal to the pump, a force equal to the area of the expansion joint times the pressure in the piping.

These forces can have a significant magnitude and it is impractical to design the pump casing, base plate, support, etc., to withstand them.

Page 19 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

Consequently, when pipe couplings lack axial rigidity, a suitable pipe anchor must be installed between it and the pump proper. Alternately, adequate restraining devices should be used and properly adjusted to prevent these forces from being transmitted to 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

Ensure piping and fittings are flushed

before use.

Ensure piping for hazardous liquids is arranged

to allow pump flushing before removal of the pump.

4.6.2 Suction piping

Experience has shown that the major source of trouble in centrifugal pump installations, other than misalignment, is traceable to a faulty suction line. The utmost attention must be given to this portion of the installation to ensure that the pump receives hydraulically stable flow. The suction piping should be direct as possible and its length held to a minimum. If a long suction line is required, increase the pipe size to reduce friction losses. Then gradually reduce the pipe size in steps before entering the pump. The piping should be run without having high spots and should have a continual rise toward the pump. This prevents air pockets.

Clean out all debris from the suction line and wet well prior to operating the pumps. Care should be exercised to keep the suction piping air tight and sealed against leakage.

Isolation valve in suction line is strongly recommended to facilitate future servicing needs. An isolation valve is recommended in the suction line, if a positive head exists.

4.6.2.1 Suction piping guidelines

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) Pipe work reducers should have a maximum total

angle of divergence of 15 degrees.

c) On suction lift the piping should be inclined up

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

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

constant fall towards the pump.

e) Flow should enter the pump suction with uniform

flow, to minimize noise and wear. This is particularly important on large or high-speed pumps that should have a minimum of four diameters of straight pipe on the pump suction between the elbow and inlet flange.

f) Inlet strainers, when used, should have a net free

area of at least three times the inlet pipe area.

g) Do not install elbows at an angle other than

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

h) 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.

i) Fitting an isolation valve will allow easier

maintenance.

j) Never throttle pump on suction side and never

place a valve directly on the pump inlet nozzle.

4.6.3 Discharge piping

A check valve and a gate valve are normally installed in the discharge line. The check valve is normally placed between the pump and the gate valve to protect the pump from any excessive back pressure and reverse rotation that may be caused by water running back through the pump casing during a driver or power failure. Any reverse flow through the pump or excessive back pressure should be kept to an absolute minimum. The check valve will also prevent suspended solids from accumulating in the casing and will increase wearing life.

• Pipe work reducers should have a maximum total angle of divergence of 9 degrees.

• Fitting an isolation valve will allow easier maintenance.

• A compound pressure gauge should be connected to the suction and a pressure gauge connected to the discharge side of each pump. Mount the gauges at a convenient location as they are necessary for any adequate check on pump performance.

Page 20 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

4.6.4 Auxiliary piping

4.6.4.1 Drains

Pipe pump casing drains and gland leakage to a convenient disposal point.

4.6.4.2 Pumps fitted with gland packing

When suction pressure is below ambient pressure it

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.

The motor must be wired up in

is necessary to feed the gland packing with liquid to provide lubrication and prevent the ingress of air. This is normally achieved with a supply from the pump discharge volute to the stuffing box.

If the pumped liquid is dirty and cannot be used for sealing, a separate clean compatible liquid supply to

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.

the gland at 1 bar (15 psi) above suction pressure is recommended.

4.6.4.3 Pumps fitted with mechanical seals

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

before connecting the motor to the electrical supply.

4.8 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.

See section 5.3, Direction of rotation

Special seals may require different auxiliary piping to that described above. Consult seal User Instructions and/or Flowserve, if unsure of correct method or arrangement

For pumping hot liquids, to avoid seal damage, it is

previously described, to ensure no pipe strain. If pipe strain exists, correct piping.

4.9 Protection systems

Recheck the coupling alignment, as

recommended that any external flush/cooling supply be continued after stopping the pump

4.6.5 Final checks

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

4.7 Electrical connections

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

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

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

It is important to be aware of the EUROPEAN DIRECTIVE on potentially explosive areas where compliance with IEC60079-4 is an additional requirement for making electrical connections.

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

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

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 on a regular basis.

Flowserve for advice.

Page 21 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

5 COMMISSIONING, START-UP, OPERATION AND SHUTDOWN

These operations must be carried out

by fully qualified personnel.

To ensure safety, keep the power supply turned off to the motor and pump accessories during commissioning.

5.1 Pre-commissioning procedure

The gland is to be filled with grease and flush supply to be in place. Flush piping to be checked for leaks. Mechanical seals to be checked for leaks, flush flow and pressure. In addition, follow the list below.

a) Pump bearings must be filled with the

recommended lubricant to avoid running dry and to guarantee acceptable performance of the pump.

b) Check all vent connections for complete filling of

the pump.

c) Check the direction of rotation of the pump

(Coupling spacer dismantled).

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

correct axial position.

e) Check the readiness of all auxiliary systems (seal

sys. lubrication sys.,) for start up.

f) All pipe work, including the internal and the

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

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

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

h) Check the readiness of the driver for start up.

Refer to driver User instructions before energizing the motor.

5.2 Pump Lubrication

Determine the mode of lubrication of the pump set, e.g. grease, oil, and product lubrication.

Recommended grease types with their brand names and quantities are provided in section 5.2.5. Grease lubricated pumps and electric motors are supplied pre-greased.

5.2.1 Bearings – oil lubricated

MNV/MNZ pumps are furnished with grease lubricated bearings as standard. At the customer’s request, special arrangements can be made to lubricate the bearings with oil. However, although the oil and grease lubricated bearing frames are physically interchangeable in whole, individual parts may or may not be interchangeable. Check with the nearest Flowserve Sales Representative to determine inter-changeability of parts.

Before starting the pump, check the lubricant level or the required quantity.

5.2.2 Bearings – grease lubricated

MNV & MNZ pumps are normally furnished with grease lubricated bearings with grease fittings on the line and thrust bearing ends of the bearing housing; see sec 5.2.3.1.

Before starting the pump, check the bearing frame cavities for grease and add grease as necessary. The suggested frequency and grease quantity for relubrication are provided in sec. 5.2.5.2

After start up, remove the grease fittings or pipe plug closest to the cover and allow the excess grease to flow out.

5.2.3 Filling the grease reservoir

The grease flowing out of the bearing frame may be hot and under pressure. Bearings may run slightly hot immediately after adding new grease.

Monitor the bearing temperatures until they return to normal. Any marked increase in the temperature of the bearings after return to normal operation may indicate the presence of dirt in the bearing, insufficient cleaning, improper re-assembly, or a faulty/damaged bearing. In this case the pump should be immediately stopped and the cause of the trouble investigated.

Page 22 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

5.2.3.1 Grease fittings

GREASE FITTING

THRUST BEARING

END

BEARING FRAME

LINE BEARING

END

5.2.4 Bearing operating temperatures

The maximum operating temperatures for anti-friction bearings will differ from unit to unit. In general, bearing frames using Timken bearings can run 40oC (100oF) higher above ambient. This should be no cause for alarm. However, continuously rising temperatures, or an abrupt temperature rise, is indicative of possible trouble. These symptoms require immediate stopping of the pump and a thorough investigation to determine the cause of the trouble.

PLUGGED

GREASE FITTING

PLUGGED

5.2.5 Selection of grease lubricants

The bearings are to be lubricated with a premium quality lithium based NGLI # 2 grease suitable for antifriction bearing use. The grease should have a viscosity range of 150 to 220 cSt (mm2/sec) at 40 oC (100 oF) and Timken load rating of 16 kg (35 lb.) minimum. The grease should contain rust and oxidation inhibitors and extreme pressure additives

Others greases meeting the above requirements may also be used.

5.2.5.1 Recommended grease lubricants

AMOCO AMOLITH EP2 CHEVRON DURALITH EP2 EXXON LIDOK EP2 MOBIL MOBILUX EP2 BP ENERGREASE-LS-EP2 SHELL ALVANIA EP2 TEXACO MULTIFAK EP2

TIME

Page 23 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

5.2.5.2 Recommended grease fill quantities

Frame

No.

Line Bearing Thrust Bearing Freq. Qty. Ounces

Conn.1 Cover2 Conn.1 Cover2 Hours Line Brg Thr. Brg

4T JLM506849/

5T 29685/

6 6536/

8HA

9HA

Line

Bearing,

Timken

CUP P.N./

CONE P.N.

JLM506810

29620

6580

HM218210/

HM218248

JM822010/

JM822049

JHM522610/

JHM522649

74850/

74500

95925/

95500

82931/

82576

H239610/

H239640

93125/

93825

Thrust

Bearing,

Timken

CUP P.N./

CONE P.N.

M804048/

M804010

72225C/

72487

6536/

6580

9220/ 92853

9321/

9386H

98788/

98400

HM926710/

HM926740

HH926710/

HH926749

HH926710/

HH926749

H936310/

H936349

H936310/

H936349

(1.5)

(2.0)

369

(13.0)

(2.0)

595

(21.0)

480

(17.0)

990

(35.0)

880

(31.0)

880

(31.0)

1560

(55.0)

1560

(55.0)

Initial Fill

(0.3)

(0.5)

114

(0.4)

(1.5)

(3.0)

225

(8.0)

200

(7.0)

425

(15.0)

625

(22.0)

625

(22.0)

480

(17.0)

(oz)

(1.0)

(2.0)

369

(13.0)

(3.0)

370

(13.0)

565

(20.0)

680

(24.0)

1135

(40.0)

1135

(40.0)

1845

(65.0)

1845

(65.0)

(0.8)

(2.0)

225

(8.0)

127

(4.6)

255

(9.0)

650

(23.0)

310

(11.0)

1135

(40.0)

1135

(40.0)

1700

(60.0)

1700

(60.0)

Suggested Re-Lubrication

300 9

300 11

300 28

300

500

(oz)

(0.3)

(0.4)

(1.0)

(0.5)

(1.0)

(1.5)

(2.0)

(2.5)

(0.3)

(0.4)

(1.0)

(0.5)

(1.0)

(1.5)

(2.0)

(2.5)

• This value indicates the amount of grease to be added to the bearing through the grease connection. For horizontal units, the space between the bearing and the grease retainer will be 2/3 full.

• This value indicates the amount of grease required for packing the space between each bearing and its respective cover. The space between bearings and their respective covers should be 1/3 full.

• This bearing must comply to Timken Co. inspection code 20481

5.2.6 Grease change schedule

When grease nipples are fitted, one charge between grease changes is advisable for most operating conditions.

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 40 ºC (100 ºF) above ambient. If the temperature is exceeding this limit, a special consideration may have

5.3 Impeller clearance

(See section 6.1.6)

5.4 Direction of rotation

Ensure the pump is given the same rotation as the pump direction arrow cast on the pump casing.

To avoid dry running the pump must either be filled with liquid or have the flexible coupling disconnected before driver is switched on.

to be given to set the alarm and trip. Consult Flowserve with the temperature data for recommendations (If needed).

out to the site's electricity supply, the direction of

If maintenance work has been carried

rotation should be re-checked as above in case the

Never mix greases containing different

supply phasing has been altered.

bases, thickeners or additives.

Page 24 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

5.5 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.

5.6 Priming and auxiliary supplies

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.

Prime your pump before starting. Do not run the pump dry!

Observe extreme caution when priming , venting and draining hazardous liquids. Wear protective clothing in the presence of hazardous, caustic, volatile, inflammable or hot liquids. Do not breath the toxic vapors. Do not allow sparking, flames or hot surfaces in the vicinity of the equipment.

Priming a centrifugal pump means removing the air, gas or vapor from the pump casing and suction piping. Internal pump parts depend on liquid for lubrication and may seize if the casing is not completely filled with liquid prior to starting. Priming a pump can be accomplished by any of the following methods, depending on the installation.

5.6.1 Positive suction head (pressure)

With a positive suction head on the pump, priming is accomplished in the following manner:

a) Open all suction valves to allow liquid to enter the

suction piping and pump casing.

b) Open the vent valve located on the highest point

on the casing (or discharge piping) to release all entrapped air.

c) When liquid appears as a steady stream (no air

bubbles) the pump is primed and may be started.

5.6.2 Negative suction head (vacuum)

Priming by Ejector or Exhauster

When steam, high pressure water or compressed air is available, the pump may be primed by attaching an ejector to the highest point for venting the pump casing.

Proceed as follows:

a) Open the suction valve. b) Start the ejector to exhaust the air from the pump

and suction line.

c) When the ejector waste pipe exhausts liquid

continuously, the pump is primed and may be started.

To ensure that the prime is not lost, allow the ejector to operate until the pump is started and is up to operating speed. A continuous stream of liquid will indicate that the prime is being held.

5.6.3 Priming by vacuum pump

Priming may be accomplished by the use of a wet type vacuum pump. The procedure is the same as priming by ejector.

5.7 Starting the pump

5.7.1 Preliminary to starting

Read this instruction book thoroughly before starting the unit. Make sure the following items are checked before starting:

a) Pack the stuffing box and leave the gland nuts

loose.

b) Verify alignment has been accomplished as

indicated in section 4.5.

c) Lubricate the driver, as required, per the drive

manufacturer's instructions.

d) Check the direction of rotation of the driver. The

arrow on the pump casing will show the correct rotation.

e) Lubricate the couplings, as required per the

coupling manufacturer's instructions.

f) Check pump bearing lubrication as indicated in

section 5.

g) The pump must be filled with liquid (primed). If a

priming device is used, it must be operated before the pump is started.

h) Packing:

• For packed boxes, the gland nuts must be loose.

• Fill the packing grease reservoir if using a grease packed box, or If the unit is equipped with an independent flush to the stuffing box, turn on the flush liquid and verify that the proper pressure and flow are being supplied.

If the wearing rings are provided with a flushing provision, turn on the flush liquid

Page 25 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

5.7.2 Pump start up

The procedure for starting the unit will vary somewhat with each installation, however the following steps generally apply:

Turn off power to the driver.

a) Turn the pump over by hand to verify that the

pump rotor turns freely. If it is bound, do not operate the pump until the cause of the trouble is located.

b) Make sure the suction valve is open

c) Ensure flushing and/or cooling/

heating liquid supplies are turned ON before

starting the pump d) CLOSE the outlet valve e) Prime the pump.

f) Ensure all vent connections are closed

before starting. g) Start the driver per the manufacturer's instruction. h) Open the discharge valve slowly as pressure is

built up on the discharge side of the pump. If the

valve does not open within three minutes,

shutdown the unit and determine the cause.

i) If NO pressure, or LOW pressure,

STOP the pump. Refer to section 7, Faults;

causes and remedies, for fault diagnosis. j) Adjust the gland nuts on the packing. k) When in service, bearing temperature, suction,

discharge, and stuffing box pressure, stuffing box

operation, noise, and vibration for several hours.

5.7.3 Normal vibration levels, alarm and trip

For guidance and general data ,the subject pump types with rigid supports are classified based on power ratings as provided by Hydraulic Institute standards.

Alarm and trip values for installed pumps should be based on the actual measurements (N) taken on the pump in a fully commissioned (new) condition. Measuring vibration at regular intervals and recording will help to track any deterioration in pump or operating conditions.

Motor rating kW (hp)

0.75-to 7.5 (1-10) N 6.6 (0.22)

7.5 to 75 (10-100) N 6.6 (0.22)-8.0(0.32) 100-298 (100-400) N 8.0 (0.32)-8.6(0.34) 298-750 (400-1000) N 8.6 (0.34)-

Alarm =N X1.25; Trip= N X2.0

Vibration velocityunfiltered

mm/sec (in./sec) rms

5.7.4 Motor start/stop frequency

Even though motors are normally suitable for at least two consecutive starts, it is recommended to restart only after coasting to rest between starts (minimum of 15 minutes gap is recommended) with the motor initially at ambient temperature. If more frequent starting is necessary, refer to driver manufacturer’s User Instructions.

The number of motor start and stops

in any given time affects motor life.



If the motor is expected to experience multi

starts in any given time, please refer to the driver’s user instructions before the pump is put into operation.

5.8 Running or operation

5.8.1 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.

5.8.2 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.

The gland must be adjusted evenly to give visible leakage and concentric alignment of the gland ring to avoid excess temperature.

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 re-started. 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 a steady leakage and the gland nuts tightened by 10 degrees at a time until leakage is reduced to an acceptable level. As a thumb rule a minimum of 30 drops /second for every inch of sleeve diameter will keep the gland in safe operating condition. Seating of the packing may take another 30 minutes.

Page 26 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

require immediate stopping of the pump and a

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.

thorough investigation to determine the cause of the trouble.

The pump bearings will show a definite temperature rise immediately after lubrication and should be operated for 5 to 10 hours to allow the temperature to stabilize.

Never run gland packing dry, even for

a short time.

5.8.3 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.

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.

5.8.5 Reduced Capacity operation.

Generally, Flowserve non-clog pumps are designed for continuous operation above 65% of the peak efficiency capacity at maximum RPM and impeller

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.

5.8.4 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

The maximum operating temperatures for anti-friction bearings will differ from pump to pump. In general, bearing frames using Timken bearings can run 40 oC (100 oF) or higher above ambient. This should be no cause for alarm. However, continuously rising temperatures, or an abrupt temperature rise, are

diameter. They are suitable for occasional or intermittent operation at capacities outside these limits, however, pump operation may be noisy and component life may be reduced.

These limitations are placed because the impellers have wide discharges and at other capacities high magnitudes of radial reactions are encountered and flow re-circulation may occur. This is an inherent design characteristic for a pump of this type.

In many cases, particularly in sewage pumping applications, reduced capacities are met by a reduction in pump speed and no throttling is used.

Under these circumstances, these part capacity applications are not nearly so critical because of lower pump speed and relatively lower pump operating heads.

Refer applications where pump operation at other capacities are anticipated to your nearest Flowserve Sales Representative.

5.8.6 Suction lift

Sometimes the suction conditions imposed upon a centrifugal pump are extremely unfavorable and lead to a complete breakdown of the pump operation. The suction lift must be kept within the suction limitations for which the pump was sold. If the original operating conditions must be changed for any reason, consult your nearest Flowserve Sales Representative. Care should also be exercised to keep the suction piping air tight and sealed against leakage.

indicative of possible trouble. These symptoms

Page 27 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

5.9 Stopping and shutdown

a) Close the outlet valve slowly. b) Shut down the driver according to driver

manufacturer’s instruction.

c) For pumps operating under positive suction

head, after stopping the pump, continue injecting water into the stuffing box to avoid the entrance of contaminants in to the stuffing box sealing area, if required.

d) Do not tighten the gland to stop

liquid leaking out or air leaking into the stuffing box

e) If wearing rings are provided with a flushing

provision, turn off liquid to the rings several minutes after the pump is stopped.

5.10 Hydraulic, mechanical and electrical duty

This product has been supplied to meet the performance specifications of your purchase order, however it is understood that during the life of the product these may change. The following notes may help the user decide how to evaluate the implications of any change. If in doubt contact your nearest Flowserve office.

5.10.1 Specific gravity (SG)

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

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

5.10.3 Pump speed

Changing pump speed effects flow, total head, power absorbed, NPSHR, noise and vibration. Flow varies in direct proportion to pump speed, head varies as speed ratio squared 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.

5.10.4 Net positive suction head (NPSHA)

NPSH available (NPSHA) is a measure of the head available in the pumped liquid, above its vapor pressure, at the pump suction branch.

NPSH required (NPSHR) is a measure of the head required in the pumped liquid, above its vapor pressure, to prevent the pump from cavitating. It is important that NPSHA > NPSHR. The margin between NPSHA > NPSHR should be as large as possible.

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

5.10.5 Pumped flow

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

6 MAINTENANCE

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.

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

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

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

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

Page 28 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

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.

6.1 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) Any auxiliary systems installed must be

monitored, if necessary, to ensure they function correctly.

b) Gland packings must be adjusted correctly to

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

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

correct functioning of the shaft seal must be checked regularly.

d) Check bearing lubricant level, and if the hours

run show a lubricant change is required.

e) Check that the duty condition is in the safe

operating range for the pump.

f) Check vibration, noise level and surface

temperature at the bearings to confirm satisfactory operation.

g) Check dirt and dust is removed from areas

around close clearances, bearing housings and motors.

h) Check coupling alignment and re-align if

necessary.

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 problem persists.

6.1.1 Routine inspection (daily/weekly)

Hourly and daily observations should be made of the pump operation to avert trouble. Whether or not you consider a log of these inspections necessary, the operator must be alert for irregularities in the operation of the pumps. He should immediately report any trouble symptoms that are detected. Stuffing box operation and bearing temperatures should be checked periodically. An abrupt change in bearing temperatures is much more indicative of trouble than a consistently high temperature. A change in the sound of a running pump is also a warning of possible trouble.

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 e.g. heating/cooling,

if fitted, are functioning correctly.



Refer to the manuals of any associated

equipment for routine checks needed.

Page 29 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

6.1.2 Periodic inspection (six monthly)

Check the stuffing box for free movement of the gland. Clean and oil the gland studs and nuts. Closely observe the stuffing box for excessive leakage which cannot be reduced by gland adjustment, and replace the packing as necessary. Check the pump running records for hourly usage to determine if the bearings should be inspected and relubricated. The maximum recommended time between cleaning and lubrication change is one year, regardless of usage. The severity of the environment and conditions of service may dictate shorter frequency.

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.

6.1.3 Complete overhauls

Frequency of a complete overhaul depends upon the hours of pump operation, the severity of the conditions of service, the materials used in the pump construction, and the care the pump receives in operation.

Do not open your pump for inspection unless there is definite evidence that the capacity has fallen off excessively or unless there is indication of trouble inside the pump or in the bearings.

6.1.4 Complete cleaning during a major overhaul

If the bearings need cleaning, or if an overhaul period offers the opportunity, the lubricant cavities and bearings should be cleaned.

After the pump has been dismantled, use a brush and wash out the housing with hot oil, 94o to 115oC (200o to 240oF), or non-toxic solvent. Flush the housing with a light mineral oil to prevent rust and to remove all traces of solvent.

Using a brush dipped in hot oil, 82o to 94oC (180o to 200oF) ,remove any solid particles while gently spinning the bearing. If badly oxidized grease is present and refuses to come off with the above procedure, the bearings should be immersed in a hot non-toxic solvent and allowed to soak. Brush and spin the bearings until the oxidized grease is removed.

Difficult spots can sometimes be removed with a mixture of alcohol and light mineral solvent. Flush the bearings with clean, light oil to remove any contaminated oil

6.1.5 Maintenance of casings

The casing waterways must be kept clean and clear. Whenever a unit has been dismantled, clean the waterways of the casing. These pumps have two casing gaskets that may be damaged when the pump is opened. One gasket is between the stuffing box head and the casing, and the other is between the suction head and the casing.

New casing gaskets must be the same thickness and material as the original so that they will compress to the same extent. Gaskets originally installed were Aramid fiber with SBR rubber. When installing a new gasket proceed as follows

a) Clean the flanges. Dirt and scale provide

leakage paths.

b) Lubricate the fastener threads and mounting

face. Threads should be well formed and free running.

c) Trim the gasket edges squarely and neatly and

coat the gasket with a suitable release agent.

d) Place the gasket on the flat surface of the flange

and assemble the flange joints and run up all the fasteners finger tight. Develop final torque using "Recommended Torques for Threaded Fasteners" at the end of this section, in about three equal steps by cross-tightening evenly.

6.1.6 Maintenance of wearing rings

Generally, the rings should be renewed or overhauled when the pump performance has decreased appreciably due to excessive wearing ring clearance. The original nominal design running clearance was 0.51 to 0.76 mm (0.020 to 0.030 in.) axially.

Pumps equipped with mechanical seals may require rotor removal and resetting of the seal after adjusting the wearing ring gap. Refer to mechanical seal manufacturer's instructions.

Page 30 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

6.1.6.1 Measuring wearing ring gap

There are two methods for checking wearing ring clearance on pumps equipped with axial wearing ring construction. The simplest is to remove the suction head hand hole cover and check with a feeler gauge around the gap perimeter. The second method is follows:

The bearing frame support bolts must be loosened to allow movement of the bearing frame during adjustment. Be sure to re-tighten the bolts when the wearing ring gap adjustment is completed.

a) Disconnect pump coupling halves if required. b) Back off the bearing frame retaining screws

between the bearing frame and the stuffing box approximately 1.5 mm (0.06 in.) Please do not remove the screws

c) Tighten the two exterior jacking bolts to break the

shim joint, then remove all shims.

d) Back off the two jacking bolts until they are even

with the bottom of the bearing frame flange. Tighten the bearing frame retaining screws until the impeller wearing ring seats against the casing wearing ring. Ensure that the gap between the bearing frame and stuffing box flange is even all the way around the perimeter.

e) Measure the gap between the bearing frame

flange and the stuffing box head flange. Add the desired amount of wearing ring gap to the measurement. This is the required amount of shims to be added between the bearing frame and the stuffing box head.

6.1.6.2 Adjusting wearing ring gap

After the actual ring gap has been determined, adjust the shim pack as required to obtain the desired ring gap. If the desired ring gap cannot be obtained because of having reached the limit of axial adjustment, one or both of the wearing surfaces will have to be restored or replaced.

a) Tighten the two jacking bolts to allow until they

are even with the bottom of the bearing flange.

b) After the shims are in place, back off the two

jacking bolts until they are even with the bottom of the bearing frame flange.

c) Tighten the four bearing frame retaining screws.

Ensure that the gap between the bearing frame and stuffing box flange is even all the way around the perimeter.

d) Rotate the pump shaft by hand to check for free

rotation. Recheck the gap and repeat steps a thru d as necessary.

e) Recheck the coupling alignment and then replace

the coupling bolts.

Shim stock identification:

Light Brown = 0.76 mm (.030 in.) Yellow = 0.51 mm (.020 in.) Brown = 0.25 mm (.010 in.) Blue = 0.12 mm (.005 in.)

Each shim set consists of two halves, permitting easy removal. Each half must be the same thickness

6.1.6.3 Removal of wearing rings

The impeller and suction head wearing rings are held in place by screws locked in place using Loctite 271 or equivalent. They may require heating to 200 oC (400 oF) to allow removal.

6.1.6.4 Mounting of wearing rings

Clean the screw threads and taps. Clean the ring and the area where the ring is to be mounted. Mount the ring and secure it using screws with Loctite 271 or equivalent applied to the threads.

New tapped holes may be required to facilitate installation of a new wearing ring. Use the wearing ring as a template.

6.1.7 Maintenance of shaft and shaft sleeve

When the pump is dismantled, examine the shaft carefully. Its condition should be checked at the impeller hub fit, under the shaft sleeve (if sleeve is removed), at the bearings, and under the coupling flange (if flange is removed). The shaft may become damaged by rusting or pitting due to leakage along the shaft at the impeller or shaft sleeve, excessive exposure to moisture, or mishandling.

Anti-friction bearings improperly fitted to the pump shaft may result in the bearing cone rotating on the shaft, thus causing undue damage. Check the shaft keyways for distortion. Excessive thermal stresses or corrosion may loosen the impeller on the shaft and damage the keyway. Replace a shaft that is bent or distorted. If wear on the shaft is slight, it may be possible to rebuild it by metal spraying or plating and re-grinding. This repair should be carried out by trained and competent personnel.

After a shaft has been repaired, check it for possible runout, maximum 0.051mm (0.002 in.) T.I.R. Recheck the runout after the bearing frame is completely assembled.

When the sleeve has become worn appreciably, it becomes difficult to adjust the packing to prevent leakage and it should be replaced. Excessively grooved and scored sleeves will tear new packing as soon as it is inserted into the stuffing box.

Page 31 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

Any sleeve grooved more than 3.0 mm (0.12 in.) deep should immediately be replaced to avoid damage to other components.

The shaft sleeve was mounted on the shaft using Loctite RC/680 and may require heating to approximately 230 oC (450 oF) for removal.

6.1.7.1 Shaft sleeve removal

Uniformly heat the shaft sleeve to 230 oC (450 oF) and remove the sleeve while the part is hot. If this does not work, uniformly heat the sleeve to 260 oC (500 oF) and douse with cold water. This will crack the sleeve and allow mechanical removal of the sleeve. If heating is not practicable, it will be necessary to cut the sleeve off.

6.1.7.2 Mounting of shaft sleeve

Clean the shaft and shaft sleeve thoroughly and remove any oil or grease from the mating surfaces with a non-toxic solvent. Allow the solvent to dry and apply Loctite type RC/680 or equivalent to the sleeve inside diameter and shaft O.D. Install the sleeve by continuously rotating it to ensure a full and even coating of the mating surfaces. Avoid holding the sleeve in one position until the sleeve keyway is in line with the shaft keyway. Immediately install the key. This prevents "freezing" of the shaft sleeve to the shaft. Apply adequate force to the shaft sleeve face to ensure proper seating of the sleeve against the shaft shoulder. This can be done by mounting the impeller on the shaft and tightening the impeller nut. Remove excess Loctite from the parting lines. Loctite sealant will be fully cured in six hours.

6.1.8 Maintenance of packing

Pumps equipped with mechanical seals may have altered stuffing box dimensions. Refer to the seal manufacturer's installation drawing for actual box dimensions.

Use a good grade of non-asbestos packing with a high temperature surface lubricant for packing the stuffing box. Do not under any circumstances use flax packing as rapid wear of the shaft sleeve may result. The procedure for repacking the stuffing box follows:

a) Remove the split gland. b) Remove the old packing and seal cage halves

and clean the stuffing box.

c) Make sure the packing to be used is of the

correct type and size. Measure the stuffing box to determine the proper length of packing; see section 6.1.8.1. Packing should be cut slightly shorter than measured to prevent butting of the ends and buckling.

d) Insert each ring of packing separately, pushing it

as far as possible into the stuffing box and seating it firmly. Stagger the rings so that successive joints are 90o to 180o apart.

e) After installing two packing rings, insert the seal

cage. It is important to make sure the seal cage is located directly under the seal water connection and that the installation of successive rings does not displace it.

f) Continue adding more rings of packing. When

the required number of packing rings have been added, install the gland and tighten the gland nuts by hand, then back off the nuts until the gland is loose. In tightening the gland, the nuts must be brought up uniformly so that the gland is not cocked and so that the packing is subjected to a uniform pressure.

g) New packing has to be "run in". It is a good

practice to start the pump with the stuffing box gland quite loose. After the pump has been running for approximately 10 to 15 minutes, gradually tighten the stuffing box gland nuts until leakage is reduced to a steady supply or trickle. Packing that is too tight in the box will cause undue friction and create heat that will glaze the packing and possibly score the shaft sleeve. Packing must remain soft and pliable.

It may be impossible to add the last ring of packing to the stuffing box and still insert the gland. When this occasion arises, omit the last ring of packing and adjust the gland. Continue to tighten the gland as required, allowing for proper leakage, until the packing has seated itself well enough to allow the final ring to be inserted. Approximately 2 to 4 lpm (1/2 to 1 GPM) at 35 to 70 kPa (5 to 10 psi) above the maximum pump discharge pressure is recommended for sealing water. When grease sealing is used, a similar grease pressure should be maintained.

Page 32 of 47

Bolt Circle

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

6.1.8.1 Stuffing Box Data

(All Dimensions in mm (Inches)

Bearing

Frame

4T 54.0

5T 70.0

6A 89.0

7L 114.0

7H (except

16 MN-19)

7H (16 MN-19) 127.0

8L 127.0

8H 127.0

8HA 149.3

9H 179.5

9HA 209.3

(1) O.D. Sleeve tolerance is +0.00 mm/-0.13 mm (+0.000 in. /-0.005 in.) for all frames except 4T and 5T that are + 0.00 mm/-0.05 in. (+0.000 mm/-0.002 in.)

(2) I.D. Box tolerance is +0.00 mm/-0.13 mm (+0.000 in. /-0 .005 in.) for all frames except 4T and 5T which are + 0.05 mm/-0.00 mm

(+0.002 in./-0.000 in.)

6.1.9 Maintenance of mechanical seal

The following instruction, if adhered to, will help to assure a long trouble free service life for the mechanical seal.

Most seals can be installed in a standard stuffing box, therefore in an emergency, packing with the addition of a seal cage and packing gland may be utilized. Compare your seal installation drawing to the "Stuffing Box Data" in section 6.1.8.1

6.1.9.1 General instructions

a) Be sure to read all seal instructions before

installing the seal.

b) A mechanical seal is a precision product. To

ensure satisfactory operation, exercise extreme care to avoid scratching or marring the lapped seal faces.

O.D.

Sleeve

(1)

(2.13)

(2.75)

(3.50)

(4.50)

114.0

(4.50)

(5.00)

(5.88)

(7.07)

(8.24)

I.D. Box

(2)

73.0

(2.87)

95.3

(3.75)

114.3

(4.50)

139.7

(5.50)

139.7

(5.50)

158.7

(6.25)

158.7

(6.25)

158.7

(6.25)

187.5

(7.38)

217.5

(8.56)

248.0

(9.76)

Depth of Box

71.9

(2.83)

95.3

(3.75)

95.3

(3.75)

95.3

(3.75)

95.3

(3.75)

117.3

(4.62)

117.3

(4.62)

117.3

(4.62)

142.7

(5.62)

142.8

(5.62)

142.8

(5.62)

Packing

Size

9.7

(0.38)

12.7

(0.50)

12.7

(0.50)

12.7

(0.50)

12.7

(0.50)

15.8

(0.62)

15.8

(0.62)

15.8

(0.62)

19.1

(0.75)

19.1

(0.75)

19.1

(0.75)

No.

Rings

5 19.1

5 25.4

5 31.8

5 38.1

Seal

Cage

Width

(0.75)

(1.00)

(1.25)

(1.50)

Gland

Stud Size

1/2-13NC 2 130.1

5/8-11NC 2 154.9

5/8-11NC 2 175.0

3/4-10NC 2 190.5

3/4-10NC 2 215.9

7/8-9NC 2 264.2

7/8-9NC 2 298.2

7/8-9NC 2 336.0

Gland

studs

quantity

Diameter

(5.12)

(6.10)

(6.89)

(7.50)

(8.15)

(10.40)

(11.74)

(13.23)

Distance to

First

Obstruction

69.9

(2.75)

85.9

(3.38)

84.3

(3.32)

88.9

(3.50)

88.9

(3.50)

90.4

(3.56)

104.7 (4.12)

127.0 (5.00)

131.6 (5.18)

6.1.9.2 Preparing the pump

a) After assembling the bearing frame, shaft sleeve

and stuffing box, check the concentricity between the bore of stuffing box and shaft sleeve. The concentricity should not exceed the Seal Manufacture's tolerances. Also check the sleeve diameter and stuffing box bore dimensions to see that they agree with those shown on seal installation drawing.

b) Check that the face of the stuffing box is square

with the shaft sleeve to within the Seal Manufacture's tolerances. This surface must be smooth and flat to ensure good sealing between the mechanical seal gland and stuffing box face.

c) Mount the rotating assembly in the pump and

adjust the wearing ring gap. Remove the rotating assembly from the pump and scribe a line on the shaft sleeve to mark the location of the stuffing box face in relation to the shaft sleeve. Remove

Rotary to stationary seal faces are lapped to within millionths of an inch in flatness. It is therefore important to avoid grasping the rotary seal and compressing it against the spring, which due to uneven loading, may cause excessive seal face

distortion and leakage upon installation

the stuffing box head.

The wearing gap must be set before the mechanical seal is mounted since setting the gap relocates the shaft sleeve in relation to the stuffing box head by as much as 6.35 mm (0.25 in.). If the wearing gap is reset, then the mechanical seal must be remounted.

Page 33 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

Check that the sleeve is free of pits, burrs or sharp edges to prevent cutting or improper sealing of the rotating O-rings.

6.1.9.3 Installing the seal

Refer to the manufacturer's instructions for seal installation.

6.1.9.4 Before starting the unit.

Check and make certain that the gland flushing line) is clean (and also, return line if it is a double seal, open and free of any obstruction that may interfere with circulation of clear flushing liquid for the seal.

Before start up bleed all air from the seal cavity. This is necessary to ensure a clean liquid environment for effective seal operation

6.1.10 Re-lubrication

Lubricant and bearing temperature analysis can be useful in optimizing lubricant change intervals. In general the following is recommended.

6.1.10.1 Oil lubrication

Maintaining the correct oil level is very important. If a sight glass has been fitted then regular checks should be made to ensure the level is maintained at the center of the glass window.

Refer to section 5. for methods of oil fill, oil grade recommendations and for the schedule and temperature limits.

6.1.10.2 Grease lubrication

See section 5.2.5 for grease recommendations. Re-grease via grease nipples depending on the severity of the application.

a) It is important not to under or over grease the

bearings as this will lead to over heating and premature failure. Grease lubricated bearing housings have grease nipples fitted in the bearing covers.

b) Connect grease gun to the nipple.

c) Press grease into the bearing housing until the

first signs of it appear in the gap between the housing and shaft, then stop greasing.

d) The maximum allowable operating temperatures

for anti friction bearings will vary from unit to unit, depending on ambient and fluid temperature. The rise above ambient should not normally exceed 55 °C (131 °F) or a combined maximum of 95 °C (204 °F).

e) A continuously rising temperature or an abrupt

temperature rise indicates a problem. If these symptoms occur, stop the pump immediately and investigate the cause.

TIME

6.1.10.3 Grease change

if Kerosene is used to clean the bearings make sure that the required safety measures are to be in place while handling this liquid fuel for cleaning (See Fuel supplier/ manufacturer’s Material Safety Data Sheets for provided flash and flame temperatures). a) Remove the bearing housing from the rotor

assembly.

b) Brush the bearing housing with hot oil (at about

94o to 115oC (200o to 240oF) or other non-toxic solvent.

c) Clean and flush out the housing with a light

mineral oil.

d) Do not use waste oil to clean the housing.

Page 34 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

6.1.10.4 To clean the bearings

a) Wipe off as much grease as possible with a clean

lint-free cloth.

b) Brush bearings with hot oil or non-toxic solvent

80 to 95 oC (180 to 200 oF ) while gently spinning the outer bearing ring.

c) Spin each roller to ensure that it is clean

6.1.10.5 To remove badly oxidized grease

a) Support the rotor in a vertical position and

immerse the bearing in hot kerosene or a mixture

of alcohol and light mineral solvent. b) Gently spin the bearing outer ring. c) Dry and reflush the bearing with clean light oil.

d) It is important not to under or over grease the

bearings as this will lead to over heating and

premature failure. It is recommended that the

bearings be filled with grease using a suitable

spatula. In addition the housings should be no

more than half filled.

6.1.11 Mechanical seals

No adjustment is possible. When leakage reaches an unacceptable level the seal will need replacement.

6.1.12 Gland packing

The stuffing box split gland can be completely removed for re-packing 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 pressurized flush to the center of the packing. If not required, this can be replaced by an extra 2 rings of packing.

There must always be a small leakage, normally a minimum of 30~60 drops per minute is required depending upon the sleeve diameter.

6.2 Spare parts

6.2.1 Ordering of spares

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

a) Pump serial number. b) Pump size. c) Part name – taken from section 8. d) Part number – taken from section 8. e) 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.

6.2.2 Service parts

The severity of the condition of service, the extent to which repairs can be carried out in the field, and the number of units installed will determine, to a great extent, the minimum number of service parts that should be carried in stock at the installation site. It is suggested, as insurance against delays, that service parts be purchased at the time the pump order is placed or as soon after receiving the pump as possible.

A suggested spare parts list (priced if desired) can be furnished upon request.

6.2.3 Returning parts

All material returned to the factory must have a returned material (RM) tag attached. Consult the nearest Flowserve sales office or OEM factory for shipping instructions and "RM" tags. Unnecessary delays are avoided when parts or equipment are returned to the proper factory using the correct procedure. a) When contacting the sales office or factory for

return authorization, list the material to be returned and the reasons for returning it.

b) On receipt of the "RM" tags, be sure to check the

part name, the part number, the quantity of parts involved, and the serial number of the equipment.

c) The "RM" tag must accompany the material

shipped. Enclose it in the shipping container or attach it to the part being returned.

Page 35 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

d) In cases where more than one part or box is

returned, individually print or stencil your name,

the part name, and the "RM" tag number on each

part or box. Then attach the "RM" tag to one of

the parts or boxes. This will facilitate quick

identification.

Articles being returned should be carefully packed to prevent damage from handling or from exposure to the weather.

6.2.4 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.

6.3 Suggested spares and consumable items

For start up purposes:

1 - complete set of gland packing 1 - shaft sleeves 1 - set of gaskets and seals (optional: 2 - mechanical seal kits)

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 (optional: 2 - mechanical seals, 2 - impeller wear rings)

6.4 Tools required

No special tools are needed to maintain this pump. Most tools are readily available in standard tool kits, and dependent on pump size:

• Open ended spanners (wrenches)

• Socket spanners (wrenches)

• Allen keys

• Range of screwdrivers

• Soft mallet

For some specialized equipment:

• Bearing induction heater/Oven

• Dial test indicator

• C-spanner (wrench) - for removing shaft nut.

(If difficulties in sourcing are encountered, consult Flowserve.)

6.5 Fastener torques

The following table is provided as a guide for the proper assembly of Grade (SAE) 2 fasteners.

Torques are for lubricated threads. Lubricate the fastener and tapped hole threads and the underside of the bolt heads and nuts before assembly.

DO NOT lubricate threads that require the

application of Loctite thread locking compound.

Bolt size

mm (in.)

M 6 (1/4) 8 (6) M 8 (5/16) 16 (12) M 10 (3/8) 28.5 (21) M 12 (7/16) 47.5 (35) M 14 (1/2) 70 (50) *(9/16) 95 (70) M 16 (5/8) 135 (100) M 20 (3/4) 235 (175) M 24 (7/8) 205 (150) M 27 (1) 305 (225) M 30 (1-1/8) 435 (320) M 33** (1-1/4) 610 (450) M 36 (1-3/8) 800 (590) M 39** (1-1/2) 1070 (790)

No metric equivalent available

Torque

N-m (lb-ft)

** Nearest size equivalent in metric (non-std)

For assembly of a joint always finger tighten all nuts or bolts first. Then cross-tighten evenly in about three equal steps to develop final torque values.

6.6 Renewal clearances.

As wear takes place between the impeller and casing ring the overall efficiency of the pump set will decrease. To maintain optimum efficiency it is recommended that rings are replaced and the impeller refurbished. The clearance dimensions depends on pump size. Contact Flowserve representative for the service advise.

Page 36 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

6.7 Disassembly

Refer to section 1.6, Safety, before dismantling

the pump.

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

6.7.1 Preliminary dismantling procedure

a) Isolate motor and lock off electrical supply in

accordance with local regulations. b) Isolate suction and discharge valves. c) Remove coupling guards and disconnect the U

shaft. d) Drain pump casing. Remove any auxiliary piping

if applicable.

6.7.2 Pump dismantling procedure

Care must be exercised in the dismantling operation. Close the suction and discharge valves and drain liquid from the casing. For convenience at reassembly, lay out all parts in the order in which they are removed. Protect all machined faces against metal to metal contact and corrosion. Proceed as follows referencing the pump sectional drawing.

a) Disconnect the intermediate shaft section closest

to the pump. If possible, swing the shaft section

out to the side and secure. b) Unbolt the stuffing box head from the casing. c) Draw out the rotating assembly complete with the

stuffing box head, bearing housing, impeller, etc.

Exercised care in slinging and handling the unit. d) Remove the impeller nut set screw and the

impeller nut. The set screw was mounted using

Loctite 271 or equivalent and may require

heating to 200 oC (400 oF) for removal. A

standard square bar will fit the square hole

provided in the impeller nut. e) Remove the impeller and impeller key. f) Remove the packing gland. If the pump is

equipped with a mechanical seal unbolt the

gland. g) Unbolt and remove the bearing frame from

stuffing box head. The packing and seal cage

halves may be removed at this time. Remove

the mechanical seal if so equipped. h) Remove the shaft sleeve only if necessary; see

Maintenance of Shaft and Shaft Sleeve. i) Remove pump coupling half. Do not hammer to

remove. j) Remove the upper and lower outside seal rings.

k) Remove the upper and lower bearing housing

covers with their respective seals. If a bent shaft is suspected, the shaft should be checked for runout at this time. The maximum permissible runout is 0.002" (0.051mm) TIR at the bearing, coupling, sleeve, and impeller turns.

l) Disengage the thrust bearing lock washer tab

from its locknut. Unscrew the thrust bearing locknut and remove the lock washer and bearing washer.

m) Remove the shaft toward the impeller end. The

thrust bearing will be pushed off the shaft by this movement.

n) For further removal of bearings refer to

Maintenance of Bearings.

Carefully examine all individual parts, important joints, and all wearing surfaces as the pump and rotor are dismantled. As a general rule, regardless of the performance of the unit, bearings and parts appreciably worn should be renewed if it is not intended to examine the pump again until the next overhaul period.

6.7.3 Bearing installation and removal

Anti-friction bearing cones (inner race) are usually pressed or shrunk onto the shaft. The cups (outer races) are usually pressed or shrunk into the bearing housing. When mounting bearings it is important that the proper fit is maintained.

When a pulling device is used to remove bearings from the shaft, the pulling jaws or fingers should be located on the bearing cone. When other parts do not interfere, the bearing cone may be supported by a split ring and the shaft pressed out using an arbor press. The bearing cups can similarly be pulled out of the housing.

There are two methods for mounting a bearing on the pump shaft:

a) Heating the bearing to expand the cone and

shrinking it on the shaft.

b) Pressing the bearing onto the shaft.

The method (a) is preferred over the method (b).

Heat the bearing in an oil bath or electric oven to a uniform temperature of 120 oC (250 oF). When heated, quickly mount it on the shaft. If the alternate method is used, apply force by means of an arbor press; see detail below. Use a tubular sleeve, ring, or small blocks of equal thickness to apply the force to the cone (inner race).

Page 37 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

In forcing a bearing onto a shaft, be careful that the cone is never cocked.

Check the position of the bearing on the shaft with a feeler gauge to ensure it is pressing firmly against the shaft shoulder.

ARBOR PRESS

SHAFT

BEARING CONE

RING ON CONE ONLY

a) Mount a dial indicator on the thrust end of the

housing with its arm resting on top of the pump shaft.

b) With the bearing assembly supported vertically

on the impeller, oscillate the frame to allow the line bearing rollers to fully seat. If this is not done false readings will be obtained. Record the dial indicator reading.

c) Now lift the bearing frame and oscillate the shaft

to allow the thrust bearing rollers to fully seat. Record the dial indicator reading.

d) The bearing end play is the difference in readings

in items (b) and (c) above. Repeat steps (b) and (c) above to assure measurement consistency.

e) Once the endplay is set, bend over the closest

lock washer tab into one of the thrust bearing locknut slots. This will secure the bearing locknut in place.

Mounting a bearing cone on a shaft using an arbor press

6.7.4 Bearing end play adjustment

The initial end play will usually be 0.13 to 0.38 mm. (0.005 to 0.015 in.). Adjust to the recommended end play shown in section 6.7.5 by tightening the thrust bearing nut as necessary and repeating the procedure below to check the end play. If the end play becomes less than the recommended endplay, the thrust bearing nut must be loosened and the thrust bearing cone backed off by pressing if necessary (due to likelihood of being an interference fit). DO NOT exceed the static rating of the thrust bearing if pressing is necessary. The entire rotating element (bearing frame, stuffing box head, and impeller) should be assembled before the bearing endplay is set. The assembly weight is necessary to properly set the bearing endplay.

Page 38 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

6.7.5 Bearing end play

Bearing

Frame

With full tang movement With 1/4 tang movement

4T 0.03-0.10

5T 0.03-0.10

6 0.03-0.10

6A 0.03-0.10

7L 0.03-0.10

7H 0.03-0.10

8L 0.03-0.10

8HA

9HA

Recommended

end play

mm (in.)

(0.002 - 0.004)

0.03-0.10

(0.002 - 0.004)

0.08-0.16

(0.003 -0.005)

0.08

(0.0033)

0.08

(0.0033)

0.07

(0.0028)

0.07

(0.0028)

0.11

(0.0044)

0.11

(0.0044)

0.11

(0.0044)

0.11

(0.0044)

0.17

(0.0066)

End play adjustment

mm (in.)

0.02

(0.0008)

0.02

(0.0008)

0.02

(0.0008)

0.02

(0.0008)

0.03

(0.0011)

0.03

(0.0011)

0.03

(0.0011)

0.03

(0.0011)

0.04

(0.0016)

Thrust bearing

static load rating

(lb.)

2250

(4970)

5580

(12300)

6220

(13700)

8850

(19500)

6560

(14470)

7200

(15880)

10240

(22580)

15950

(35170)

23550

(51920)

6.8 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.

6.8.1 Casing, seal housing and impeller

a) Inspect for excessive wear, pitting, corrosion,

erosion or damage and any sealing surface irregularities.

b) Replace as necessary.

6.8.2 Shaft and sleeve (if fitted)

Replace if grooved, pitted or worn.

6.8.3 Gaskets and O-rings

After dismantling, discard and replace.

6.8.4 Bearings

a) It is recommended that bearings are not re-used

after any removal from the shaft.

b) The plain liquid lubricated bearings may be re-

used if both the bearing bush and bearing sleeve show no sign of wear, grooving or corrosion attack. (It is recommended that both the bush and sleeve are replaced at the same time.)

6.8.5 Bearing isolators, or lip seals (if fitted)

a) The lubricant, bearings and bearing housing

seals are to be inspected for contamination and damage. If oil bath lubrication is utilised, these provide useful information on operating conditions within the bearing housing.

b) If bearing damage is not due to normal wear and

the lubricant contains adverse contaminants, the cause should be corrected before the pump is returned to service.

c) Lip seals and bearing isolators should be

inspected for damage but are normally nonwearing parts and can be re-used.

d) Bearing seals are not totally leak free devices.

Oil from these may cause staining adjacent to the bearings.

Page 39 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

6.9 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.

6.9.1 Bearing housing assembly - Grease lubricated

a) Be sure the shoulders where the bearings seat,

are free of burrs and contaminants.

b) Mount the grease retainers into their respective

bores [51, 51A]. Prick punch the outer diameter at two places 180o apart to secure them to the bearing frame, if necessary. Do not remove the grease retainers on disassembly unless they are to be replaced.

c) Mount the bearing cups (outer races) [16,18] into

their respective bearing housing bores (either chill or press in to install). Be sure the cups seat against the bearing housing shoulders.

d) Assemble the line bearing cone [16] on the shaft

[6] (heat or press to install). See section 6.7.3 for details.

e) Install the shaft [6] with the thoroughly grease-

packed line bearing cone fitted, through the housing and support the assembly vertically (thrust end up).

f) Heat the thrust-bearing cone to approximately

95 oC (200 oF) and assemble it on the shaft together with the bearing washer [22B], lock washer [22A], and locknut [22]. Hand tighten the nut.

g) Assemble the line bearing inner seal [40A], line

bearing cover [35] and outer seal [40A]. Adjust the bearing endplay; See Bearing End Play

adjustment in section 6.7.4. h) Pack the thrust bearing [18] with grease. i) Install the thrust bearing’s inside seal [49], cover

[37] and outside seal [40].

The impeller set screw and wearing ring screws are locked in place using Loctite 271 or equivalent. The shaft sleeve is mounted using Loctite RC/680 or equivalent. Mating surfaces must be thoroughly cleaned and dry prior to application of the adhesive compound.

6.9.1.1 Impeller nut

LOCATION FOR SQUARE BAR

IMPELLER NUT

SET SCREW

IMPELLER NUT

IMPELLER NUT FILLET (2 PLACES 18O°APART)

Grease all the contact seal lips before installation. Position the outside seals (line and thrust bearing) with minimum lip contact to the covers. Excessive lip pressure will result in the seal rings running hot and premature seal ring failure.

6.9.2 Pump assembly

To assemble the pump, reverse the dismantling instructions previously described.

a) Follow the bearing housing assembly, wearing

ring, packing, and shaft sleeve assembly instructions. Torque all assembly bolts and screws to the recommended torque values listed in section 6.5.

b) If the unit is equipped with a mechanical seal,

refer to the mechanical seal manufacturer's

instructions for installation. c) Install the rotating assembly in the casing [1]. d) Check that the impeller [2] turns freely and adjust

the wearing ring gap. See section 6.1.6 for

details. e) Align the pump with the motor; see Section 4.5. f) Install the packing and seal cage; see Section

6.1.8.

g) Add lubricant as described in Section 5.2.

Page 40 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

7 FAULTS; CAUSES AND REMEDIES

FAULT SYMPTOM

P ump ov e r h eats a n d sei z e s

B earin gs h ave sh o r t lif e

⇓

P ump vi b r a tes o r i s nois y

⇓

M echa ni c a l sea l/ g l a n d h as s h o rt l if e

⇓

M echa ni c a l sea l/ g l a n d l ea k s e xces si v e l y

⇓



     

  

     

⇓

P ump re q u i res e xc e s s ive p ow e r

⇓

P ump lo s e s prim e a fter s t arti ng

⇓

I nsuf fi c i e nt d is c h a rge p r e s s ure de v e l oped

⇓

I nsuf fi c i e nt c ap a c ity d e l i ver ed

⇓



 



    



 



 



 



 

   



 



 



 

  

 

P ump do e s not de l i v er l iq u i d

⇓

PROBABLE CAUSES POSSIBLE REMEDIES

A. System troubles

Pump not primed. Pump or suction pipe not completely filled with

liquid or valves not fully open. Suction lift too high or level too low.

Insufficient margin between suction pressure and vapour pressure.

Excessive amount of air or gas in liquid. Check and purge pipes and system. Air or vapour pocket in suction line. Check suction line design for vapour 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. Impeller, casing piping partially /fully clogged. Investigate replacing the valve.

Inlet of suction pipe insufficiently submerged. Clean /open valve as required. 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. Measure value and check minimum permitted.

Operation at high capacity. Measure value and check maximum permitted.

B. Mechanical troubles

Misalignment due to pipe strain. Check the flange connections and eliminate strains

Improperly designed foundation and/or critical frequency of the system excited.

Shaft bent. Check shaft runouts are within acceptable values

Rotating part rubbing on stationary part internally. Check and Consult Flowserve, if necessary. Bearings worn Replace bearings.

Check and fill with liquid completely. Vent and/or prime.

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

Check and replace faulty parts. Refer to Seal User Instructions/Consult Flowserve.

Check system losses. Remedy or Consult Flowserve.

Check and Consult Flowserve.

Remedy or Consult Flowserve.

using elastic couplings or a method permitted. Check setting of baseplate: tighten, adjust, grout

base as required. Resonance tests

Consult Flowserve.

Page 41 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

FAULT SYMPTOM

P ump ov e r h eats a n d sei z e s

B earin gs h ave sh o r t lif e

⇓

P ump vi b r a tes o r i s nois y

⇓

M echa ni c a l sea l/ g l a n d h as s h o rt l if e

⇓

M echa ni c a l sea l/ g l a n d l ea k s e xces si v e l y

⇓

    

  

⇓



 

  

 

Excessive grease in ball bearings. Check method of re-greasing.

 

P ump re q u i res e xc e s s ive p ow e r

⇓

P ump lo s e s prim e a fter s t arti ng

⇓

I nsuf fi c i e nt d is c h a rge p r e s s ure de v e l oped

⇓

I nsuf fi c i e nt c ap a c ity d e l i ver ed

⇓

P ump do e s not de l i v er l iq u i d

⇓

PROBABLE CAUSES POSSIBLE REMEDIES



  



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.

Impeller out of balance resulting in vibration.

Abrasive solids in liquid pumped.

Wearing ring surfaces worn. Replace worn wear ring/surfaces. Impeller damaged or eroded. Replace or consult Flowserve for improved material

Mechanical seal/packing improperly installed. Check alignment of faces or damaged parts and

Incorrect type of mechanical seal/packing for operating conditions.

Shaft running off centre because of worn bearings or misalignment.

Internal misalignment of parts preventing seal ring and seat from mating properly.

Mechanical seal /packing was run dry. Check mechanical seal/gland condition and source

Internal misalignment due to improper repairs causing impeller to rub.

Excessive thrust caused by a mechanical failure inside the pump.

Lack of lubrication for bearings. Check hours run since last change of lubricant, the

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

Damaged bearings due to contamination. Check contamination source and replace damaged

selection.

assembly method used. consult Flowserve.

Check misalignment and correct if necessary. If alignment is satisfactory, check the bearings for excessive wear.

Check and consult Flowserve.

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.

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.

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 42 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

8 PARTS LIST AND DRAWINGS

8.1 MNV cross section and parts list

(Typical- Grease filled)

The sectional drawing provided in this section are typical representation of MNV pump with grease lubrication. The details shown here may not reflect the specifics of the pump that has been purchased or ordered. You may purchase order specific cross sectional drawings separately. Please contact Flowserve for pricing and ordering information on such documentation.

Page 43 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

8.1.1 Parts list MNV (See section 8.1 for details)

Ref No 1 1 Casing 9 1 Suction head 11 1 Stuffing box head 13 5 RINGS Packing 17 1 Split gland 25 1 Suction head wearing ring 29 1 Seal cage split 35 1 Line bearing cover 37 1 Thrust bearing cover 51 Grease retainer- out board 51A 1 Grease retainer inboard 59 1 Casing hand hole cover 59A 1 Suction head hand-hole cover 67 1 SET Adjusting shims 73 2 Casing gasket 73A 1 Casing hand hole cover gasket 73B 1 Suction head hand hole cover gasket 73C 1 Line bearing cover gasket 73D 1 Thrust bearing cover gasket 99 1 Bearing frame 99A 2 Adjusting bolt 125 2 Grease fitting

No required

STATIONARY PARTS

Description

Ref No No

required 2 1 Impeller 6 1 Pump shaft 8 1 Impeller wearing ring 14 1 Shaft sleeve 16 1 Line bearing 18 1 Thrust bearing 22 1 Bearing locknut 22A 1 Bearing lock-washer 22B 1 Bearing washer 24 1 Impeller nut 40 2 Seal ring (thrust) 40A 2 Seal ring (Line)

ROTATING PARTS

Description

Page 44 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

8.2 MNZ cross section and parts list

(Typical- Grease filled)

Page 45 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

8.2.1 MNZ parts list (See section 8.2 for details)

Ref No No

required

1 1 Casing 9 1 Suction head 11 1 Stuffing box head 13 5 rings Packing 17 1 Split gland 25 1 Suction head wearing ring 29 1 Seal cage split 35 1 Line bearing cover 37 1 Thrust bearing cover 51 Grease retainer- out board 51A 1 Grease retainer inboard 59 1 Casing hand hole cover 59A 1 Suction head hand-hole cover 67 1 Set Adjusting shims 73 2 Casing gasket 73A 1 Casing hand hole cover gasket 73B 1 Suction head hand hole cover gasket 73C 1 Line bearing cover gasket 73D 1 Thrust bearing cover gasket 99 1 Bearing frame 99A 2 Adjusting bolt 125 2 Grease fitting

STATIONARY PARTS

Description

Ref No No

required

2 1 Impeller 6 1 Pump shaft 8 1 Impeller wearing ring 14 1 Shaft sleeve 16 1 Line bearing 18 1 Thrust bearing 22 1 Bearing locknut 22A 1 Bearing lock washer 22B 1 Bearing washer 24 1 Impeller nut 38 1 Shaft sleeve O ring 40 2 Seal ring (thrust) 40A 2 Seal ring (Line)

ROTATING PARTS

Description

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 these drawings are sent separately, the Purchaser must retain them with the User Instructions.

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 Use Instructions.

Page 46 of 47

MNV & MNZ USER INSTRUCTIONS ENGLISH 71569188 11/04

FLOWSERVE

REGIONAL SALES OFFICES:

USA and Canada

Flowserve Corporation (Head Quarters) 5215 North O’ Connor Blvd. Suite 2300 Irving, TX 75039, USA

Tel +1 972 443 6500 Toll free 800 728 PUMP (7867) Fax +1 972 443 6800

Europe, Middle East & Africa

Flowserve Limited (Pump Division) Harley House, 94 Hare Lane Claygate, Esher, Surrey KT10 0RB United Kingdom

Tel +44 (0)1372 463 700 Fax +44 (0)1372 460 190

Visit our web site at: www.flowserve.com

Your Flowserve factory contact:

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

Customer Service-PH: +1 (410) 756 2602 Customer Service FAX: +1 (410) 756 2615 Parts inquiry/Order PH: +1 (800) 526 3569

Latin America & Caribbean

Flowserve Corporation (Pump Division) 6840 Wynnwood Lane Houston, Texas 7708, USA

Tel +1 713 803 4434 Fax +1 713 803 4497

Asia Pacific

Flowserve Pte Ltd (Pump Division) 200 Pandan Loop, # 06-03/04 Pantech 21, Singapore 128388

Tel +65 775 3003 Fax +65 779 4607

Your local Flowserve representative:

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

Page 47 of 47

Flowserve MNV User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual