HP MHP-TN User Manual

USER INSTRUCTIONS

MHP-TN centrifugal pump

Single-stage,axial suction, vertical discharge type centrifugal pump

PCN=71576313 – 02/07 (E)

Installation

Operation

Maintenance

These instructions must be read prior to installing,

operating, using and maintaining this equipment.

MHP-TN USER INSTRUCTIONS ENGLISH 71576313 - 02/07

CONTENTS

Page

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

Page

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

2.5 Recycling and end of product life ................11

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

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

3.2 Nomenclature.............................................12

3.3 Coveragecharts.........................................12

4 INSTALLATION................................................. 13

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

4.2 Foundation .................................................13

4.3 Grouting.....................................................14

4.4 Initial alignment...........................................14

4.5 Piping.........................................................15

4.6 Electrical connections.................................16

4.7 Final shaft alignment check.........................17

4.8 Protection systems.....................................17

6.1 General...................................................... 21

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

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

6.4 Recommended spares and consumable items

........................................................................ 24

6.5 Disassembly............................................... 24

7 FAULTS; CAUSES AND REMEDIES.................25

8 PARTS LIST AND DRAWINGS..........................26

8.1 Sectional drawings..................................... 26

8.2 Sectional drawings part list.........................27

8.3 General arrangement drawing.................... 27

9 CERTIFICATION............................................... 27

10 OTHER RELEVANT DOCUMENTATION AND

MANUALS ...........................................................27

10.1 Supplementary User Instructions.............. 27

10.2 Change notes........................................... 27

10.3 Additional sources of information.............. 27

5 COMMISSIONING, START-UP, OPERATION AND

SHUTDOWN ....................................................... 17

5.1 Direction of rotation.....................................17

5.2 Guarding.....................................................17

5.3 Priming and auxiliary supplies.....................17

5.4 Starting the pump........................................18

5.5 Running the pump ......................................19

5.6 Stoppingand shutdown...............................20

5.7 Hydraulic, mechanical and electrical duty....20

5.8 Pumps for Food Use or PotableWater........21

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INDEX

MHP-TN USER INSTRUCTIONS ENGLISH 71576313 - 02/07

Page

Additional sources (10.3).....................................27

Alignment of shafting(see 4.2, 4.4 and 4.7)

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

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

Certification (9)....................................................27

Change notes (10.2)............................................27

Cleaning prior to operation (5.8.1) .......................21

Commissioning, start-up, operation (5).................17

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

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

Coverage charts (3.3)..........................................12

Direction of rotation (5.1)......................................17

Disassembly (6.5)................................................24

Discharge piping(4.5.3) ......................................16

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

Dismantling (see 6.5, Disassembly) .....................24

Drawings (8.1).....................................................26

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

Electrical connections (4.6)..................................16

End of product life (2.5)........................................11

Faults; causes and remedies (7)..........................25

Final checks (4.5.4) ............................................16

First pump start up (5.4.2) ...................................18

Foundation (4.2)..................................................13

Forces and moments (see 4.5.1)..........................15

Generalarrangement drawing (8.3) .....................27

Gland packing (6.2.4)...........................................23

Grouting (4.3) ......................................................14

Guarding (5.2).....................................................17

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

Hydraulic, mechanical and electrical duty (5.7).....20

Inspection (6.2.2 and 6.2.3) .................................22

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

Internal coating(6.2.5).........................................23

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

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

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

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

Nomenclature (3.2)..............................................11

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

Operating limits (see 3.1).....................................12

Orderingspare parts (6.3.1).................................24

Parts lists (8.2).....................................................27

Piping (4.5)..........................................................15

Protection systems (4.8)......................................17

Pump masses (2.2.2) ..........................................10

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

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

Recycling (2.5).....................................................11

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

Running the pump (5.5) .......................................19

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

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

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

Safety, protectionsystems (see 1.6 and 4.8)

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

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

Sources, additional information (10.3).................. 27

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

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

Standard maintenance (6.2.1) ............................ 22

Starting the pump (5.4)........................................ 18

Stop/start frequency (5.5.5).................................20

Stoppingand shutdown (5.6)............................... 20

Storage, pump (2.4) ............................................ 11

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

Suction piping(4.5.2) .........................................15

Supplementary manuals or information sources.. 27

Thermal expansion (4.4.1) .................................. 14

Transport and storage (2) ................................... 10

Trouble-shooting (see 7)..................................... 25

Vibration (5.5.4)................................................... 19

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MHP-TN USER INSTRUCTIONS ENGLISH 71576313 - 02/07

1 INTRODUCTION AND SAFETY

1.1 General

These instructions mustalways be kept

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

Flowserve products are designed, developed and manufactured with state-of-the-art technologies in

modern facilities. The unit is produced with great care and commitment to continuous quality control,

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 installingthe product. Always coordinate repair

activity with operations personnel, and follow all plant safety requirements and applicable safety and health

laws and regulations.

These instructions must be read prior to installing, operating, using and maintaining the equipment in any region worldwide. The

equipment must not be put into service until all the conditions relating to safety noted in the

instructions, have been met.

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

MarkingDirectives covering Machinery and, where applicable, Low Voltage Equipment, Electromagnetic

Compatibility (EMC), Pressure Equipment Directive (PED) and Equipment for Potentially Explosive

Atmospheres (ATEX).

To confirmthe Approvals applying andif the product is CE marked,checkthe serial number plate markings

andthe Certification. (Seesection 9,Certification.)

1.3 Disclaimer

Information in these User Instructions is believed to be reliable.In spite of all the efforts of Flowserve Corporation to providesoundand all necessary

information the content of this manualmay appear insufficient and is notguaranteedby Flowserveas

to itscompleteness or accuracy.

Flowserve manufacturesproducts toexacting International Quality ManagementSystemStandards

as certifiedandaudited by externalQuality Assurance organizations. Genuine parts and accessories have

beendesigned,testedand incorporated intothe productsto help ensure their continuedproduct quality

and performance in use. As Flowservecannot test parts andaccessories sourced fromothervendors the

incorrectincorporationof such parts andaccessories may adversely affect the performance andsafety

features of theproducts. Thefailure to properly select, installor useauthorized Flowserve parts and

accessories is considered to be misuse. Damageor failurecausedby misuse is notcovered by the

Flowservewarranty. In addition,any modificationof Flowserve products or removalof originalcomponents

may impairthe safety ofthese products in their use.

1.4 Copyright

transmitted in any form or by any means without prior permission of Flowserve.

1.5 Duty conditions

This product has been selected to meet the specifications of your purchaser order. The

acknowledgement of these conditions has been sent separately to the Purchaser.A copy should be kept

with these instructions.

The product must not be operated beyond

the parameters specified for the application. If there is any doubt as to the suitability of the

product for the application intended, contact Flowserve for advice, quoting the serial number.

Where applicable the Directives and anyadditional Approvalscoverimportantsafety aspects relating to

machinery and equipmentand thesatisfactory provisionof technical documents andsafety

instructions.Where applicable thisdocument incorporatesinformationrelevantto these Directives

and Approvals.

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If the conditions of service on your purchase order are going to be changed (for example liquid pumped,

temperature or duty) it is requested that the user seeks the written agreement of Flowserve before

start up.

MHP-TN USER INSTRUCTIONS ENGLISH 71576313 - 02/07

1.6 Safety

1.6.1 Summary of safety markings

These UserInstructions containspecific safety markings where non-observance of aninstruction

wouldcause hazards.Thespecific 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 wouldaffect personal safety and

could result in loss of life.

This symbol indicates “hazardous substances

and toxic fluid”safety instructions where noncompliance would affect personalsafety and could

result in loss of life.

This symbol indicates safety

instructions where non-compliance will involvesome risk to safe operation and personalsafetyand would

damage the equipment or property.

1.6.3 Safety action

This is a summary of conditions and actions to prevent injury to personnel and damage to the

environment and to equipment. For products used in potentially explosive atmospheres

section 1.6.4 also applies.

NEVER DO MAINTENANCE WORK

WHEN THE UNIT IS CONNECTED TO POWER

GUARDS MUST NOT BE REMOVED WHILE

THE PUMP IS OPERATIONAL

DRAIN THE PUMP AND ISOLATE PIPEWORK

BEFORE DISMANTLING THE PUMP The appropriate safety precautions should be taken

where the pumped liquids are hazardous.

FLUORO-ELASTOMERS (When fitted.)

When a pump has experienced temperatures over 250 ºC (482 ºF), partial decomposition of fluoro-

elastomers (example: Viton) will occur. In this condition these are extremely dangerous and skin

contact must be avoided.

This symbol indicates explosive atmosphere

zone marking according to ATEX. It is used in safety instructions where non-compliance in the hazardous

area would cause the risk of an explosion.

This symbol is used in safety instructions to

remind not to rub non-metallic surfaces with a dry cloth; ensure cloth is damp. It is used where non-

compliance in the hazardous area would cause the risk of an explosion.

Thissignis nota safety symbol butindicates

an importantinstruction in theassembly process.

1.6.2 Personnel qualification and training

All personnelinvolved 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.

HANDLING COMPONENTS Many precision parts havesharp 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.

THERMALSHOCK 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.

NEVERAPPLY HEAT TO REMOVE IMPELLER

Trapped lubricant orvaporcould cause an explosion.

HOT (and cold) PARTS If hot or freezing components or auxiliary heating supplies can present a danger to operators and

persons enteringthe immediate area action must be taken to avoid accidental contact. If complete

protection is not possible, the machine access must be limited to maintenance staff only, with clear visual

warnings and indicators to those entering the immediate area. Note: bearing housings must not be

insulated and drive motors and bearings may be hot.

If the temperature is greater than 68 °C (175 °F) or below 5 °C (20 °F) in a restricted zone, or

exceeds local regulations, action as above shall be taken.

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MHP-TN USER INSTRUCTIONS ENGLISH 71576313 - 02/07

HAZARDOUS LIQUIDS

Whenthe pump is handling hazardous liquidscare must be takento avoid exposureto the liquid by

appropriate sittingofthe pump, limitingpersonnel access and byoperator training. If the liquidis

flammableand/or explosive, strict safety procedures must be applied.

Gland packingmust not be used when pumping hazardous liquids.

PREVENTEXCESSIVE EXTERNAL

PIPE LOAD Do not use pumpas a support for piping. Do not

mount expansion joints, unless allowed by Flowserve in writing, so that their force, due to internal

pressure, acts on the pump flange.

1.6.4 Products used in potentially explosive atmospheres

The following instructionsfor pumps andpump

units wheninstalled in potentiallyexplosive atmospheresmust be followed to helpensure

explosion protection. The terminology and procedures ensure that the

installed pump is in compliance with theEuropean Directive 94/9/EC, known asthe ATEXDirective, which

is mandatory in Europe and mayalso be specifiedin other countries.Where applicable, both electricaland

non-electricalequipment must meet therequirements 94/9/EC.

Evenif theinstallationis in a region where ATEXis not theapplicable regulation, the general measures

described shallbe followedtoensure safeoperation.

ENSURE CORRECT LUBRICATION

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

START THE PUMP WITH OUTLET

VALVE PART OPENED (Unless otherwise instructed at a specific point in the

User Instructions.) This is recommended to 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. Pumpoutlet valve shall may need to

be adjusted to comply with the duty followingthe runup 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 pumpat zero flow or belowthe

recommended minimum flow continuously willcause damage to theseal.

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.

The measures are explained under the headings of:

 Avoiding excessive surface temperature  Preventing build up of explosive mixtures  Preventing the generation of sparks  Preventing leakages

 Maintaining the pump to avoid hazard

1.6.4.1 Scope of compliance

Use equipmentonlyinthe zone forwhichit is

appropriate. Alwayscheckthatthe driver, drive coupling assembly, sealand pump equipment are

suitably ratedand/orcertified for theclassification of the specific atmosphere inwhichtheyare to beinstalled.

WhereFlowserve hassupplied onlythe bare shaft pump, the Ex rating appliesonly to the pump. The

partyresponsible for assembling the pump set shall selectthe coupling, driver and any additional

equipment, with the necessary CE Declaration of Conformity establishing it is suitablefor the area in

whichit is to beinstalled. The output froma variable frequency drive (VFD)can

causeadditionalheatingaffectsin the motorandso, for pumps sets witha VFD,the ATEX Certification forthe

motor must statethat it iscoversthesituation where electricalsupply is fromthe VFD. This particular

requirementstill applies evenif the VFD isin a safe area.

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MHP-TN USER INSTRUCTIONS ENGLISH 71576313 - 02/07

1.6.4.2 Marking

Anexample of ATEX equipment marking is shown below. The actual classification of the pumpwill 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 levelof protection

Gas and/orDust G = Gas; D= Dust

c = Constructionalsafety

(in accordance withEN 13463-5)

Gas Group (Equipment Category 2 only) IIA– Propane (typical)

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

Maximumsurface temperature (TemperatureClass) (seesection 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 maximumambient of 40 °C (104 °F); refer to

Flowserve for higher ambient temperatures.

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 pumpcould be

installed in different hazardous atmospheres. In this case the user is responsible for ensuring that the

pump surface temperature does not exceed that permitted in the particular hazardous atmosphere.

If an explosive atmosphere exists during the installation, do not attempt to check the directionof rotation by starting the pump unfilled. Even a short

run time may give a high temperature resultingfrom contact between rotating and stationary components.

Furthermore, confinement of liquid in the pump and pipes must be avoided (valve closed). If the liquid

heats up this may cause excessive pressure and lead to bursting of pump components.

Wherethere is any risk of the pump being run against a closed valve generating high liquidand casing

externalsurfacetemperatures it is recommended that users fit an externalsurfacetemperature 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 aroundclose clearances, bearing housings and motors.

1.6.4.4 Preventing the build up of explosive mixtures

The surface temperature on the pump is influenced by the temperature of the liquid handled. The

ENSURE PUMP IS PROPERLY FILLED AND

VENTED AND DOES NOT RUN DRY.

maximum permissible liquid temperature depends on the temperature class and must not exceed the

values in the table that follows.

Ensure pump and relevant suction and discharge pipeline system is totally filled with liquid at all times

during the pump operation, so that an explosive

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

atmosphere is prevented. In addition it is essential to make sure that seal chambers, auxiliary shaft seal

systems and any heatingand cooling systems are properly filled.

Temperature limit of liquid

handled (* depending on

material and construction

variant - check which is

lower)

If the operation of the systemcannot avoid this condition the fitting of an appropriate dry run

protection device is recommended (eg liquid

Temperature

classto

EN13463-1

Maximum

surface

temperature

permitted

detection or power monitor).

T6 T5 T4 T3 T2 T1

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

Consult Flowserve Consult Flowserve

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

To avoid potential hazards from fugitive emissions of vapor or gas to atmosphere the surrounding area

must be well ventilated.

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MHP-TN USER INSTRUCTIONS ENGLISH 71576313 - 02/07

1.6.4.5 Preventing sparks

To prevent a potential hazard from mechanical

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

current generating a spark the ground contact on the baseplate must be used.

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

Where applicable the coupling must be selected to comply with 94/9/EC and correct alignment must be

maintained.

Additional requirements for metallic pumps on non-metallic baseplates

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

(grounded).

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.

Where there is a risk fromsuch tools or materials; maintenance must be conducted in a safe area.

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

1.7 Nameplate and safety labels

1.7.1 Nameplate

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

these User Instructions.

1.7.2 Safety labels

Avoidentrapmentof liquidin thepump andassociated pipingdue toclosingof suctionand dischargevalves,

which couldcause dangerousexcessive pressures to occurif there is heatinputto the liquid. This canoccurif

the pump is stationary or running. Burstingof 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

CORRECTMAINTENANCE IS REQUIRED TO AVOID POTENTIAL HAZARDS WHICH GIVE A

RISK OF EXPLOSION

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

Oil lubricated units only:

1.8 Specific machine performance

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

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

been supplied separately to the purchaser these should be obtained and retained with these User

Instructions if required.

To avoid potential explosion hazards during maintenance, the tools, cleaningand painting

materials used must not give rise to sparking or adversely affect the ambient conditions.

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MHP-TN USER INSTRUCTIONS ENGLISH 71576313 - 02/07

1.9 Noise level

Attention must be given to the exposure of personnel to the noise, and local legislation will define when

guidance to personnel on noise limitation is required, and when noise exposure reduction is mandatory.

This is typically 80 to 85 dBA. The usual approach is to control the exposuretime

to the noise or to enclose the machine to reduce emitted sound.

You may have already specified a limiting noise level when the equipment was ordered, however if no

noise requirements were defined, then attention is drawn to the followingtable to give an indication of

equipment noise level so that you can take the appropriate action in your plant.

Pump noise level is dependent on a number of operational factors, flow rate, pipework design and

acoustic characteristics of the building, and so the values given are subject to a 3 dBAtolerance and

cannot be guaranteed.

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

and high efficiency motors when on load directly driving the pump. Note that a motor driven by an

inverter may show an increased noise at some speeds.

If a pump unit only has been purchased for fitting with your own driver then the “pumponly” noise

levels in the table should be combined with the level for the driver obtained from the supplier. Consult

Flowserve or a noise specialist if assistance is required in combining the values.

It is recommended that where exposure approaches the prescribed limit, then site noise measurements

should be made. The values are in sound pressure level LpAat 1 m

(3.3 ft) fromthe machine, for “free field conditions over a reflecting plane”.

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

Motor size and speed

kW (hp)

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

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

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

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

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

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

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

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

18.5 (25) 81 81 77 78 71 71 69 71 22 (30) 81 81 77 79 71 71 69 71

30 (40) 83 83 79 81 73 73 71 73 37 (50) 83 83 79 81 73 73 71 73 45 (60) 86 86 82 84 76 76 74 76

55 (75) 86 86 82 84 76 76 74 76

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

110 (150) 89 90 85 87 79 80 77 80 150 (200) 89 90 85 87 79 80 77 80 200 (270) 300 (400) 87 90 85 86

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

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

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

Pump

only

   

Typical sound pressure levelLpAat 1 mreference20 μPa, dBA

Pump and

motor

Pump

only

Pump and

motor

Pump

only

85 87 83 85

Pump and

motor

Pump

only

Pump and

motor

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