Multistage pumps, MP-seriesfor high head water applications

Technical characteristics

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Performance rangeCapacities up to 340 m3/h (1800 USgpm)Head up to 500 m (1640 feet)Max. speed up to 2950 rpm (3550 rpm)Multistage pumps for capacities up to 2.200 m3/h (1250 USgpm) available – series P.

For more detailed information about operation limits withregard to material of construction and operating conditionsplease refer to data sheets or actual quotations.

SizesDN 40 up to DN 125 (from 1 1/2“ to 5“) discharge

Max. temperature140oC (280oF)

Max. casing pressure55 bar (800 PSI)

Handled liquidsClean as well as slightly contaminated media such as:• cold and hot water• condensate• oil, brine, caustic and acid suspensions

Applications• water supply• booster systems• irrigation• fire fighting• snow making• cooling circuits• boiler feed• condensate• district heating• osmosis and ultra filtration• spray water systems• drainage of mines

Modular designFlygt multistage pumps utilize a modular design conceptwhich maximizes component interchangeability. As such,multiple design configurations can be engineered to meetcustomer requirements without compromise to reducespare part inventories.The entire performance range is covered by 4 mechanicalsizes that hold 8 different hydraulics.

SizeDischarge branch

DNd [mm]Suction branch

DNs [mm]Hydraulics

CapacityQ [m3/h]

50 Hz 60 Hz

MP 40. 40 65 40.2 30 3640.3 42 50

MP 65. 65 10065.1 70 80

65.2 90 110

MP 100. 100 125100.1 150 180

100.2 200 240

MP 125. 125 150125.1 240 280125.2 300 360

HydraulicsClosed radial type impellers designed for casing wear ringson both sides. Axial thrust is minimized by balance holes forminimum bearing loads and maximum bearing lifetime.Diffusers separated from stage casings, easily exchangeable.Balanced radial forces, minimum shaft deflection, minimumvibrations.

Heavy duty design for long term operation inindustrial applications.All design versions acc. to ISO 5199 / EN 25199ISO 9001 certifications guarantees high qualitystandards and reliability of our products.

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Discharge connection Suction connection

Performance range – 50 Hz

2950 rpm

1450 rpm

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Performance range – 60 Hz

3550 rpm

1750 rpm

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MP – horizontal configurationHorizontal shaft with bearings at both ends, drive-end at discharge side (standard), rotation clockwise,with suction connection left and dischargeconnection radially upwards, grease lubrication.Counter clockwise rotation and other flangeorientations available as an option.

MPA – horizontal configuration, axialsuctionEnd-suction type, discharge connection radiallyupwards. Drive end at discharge side. Thrust bearingat drive side, grease lubrication, medium lubricatedslide bearing between first and second stage. Inducerdesign available for low NPSH applications.

MPB – vertical configurationVertical close coupled design using standard IEC motorsup to 90 kW. The pump shaft is directly coupled to themotor shaft.

MPVVertical design with separate thrust bearing and flexiblecoupling between motor and pump shaft. Standard IECmotors for 90 kW and larger.

MPVSVertical wet pit configuration lengths:at 2950/3550 r.p.m.: max. 4 mat 1450/1750 r.p.m.: max. 10 mInducer design available.

Design versions

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• Horizontal configuration with outer bearings on both sides.

• Driven by electric motors, combustion engines or steam turbines via flexible coupling.

• Drive end discharge, clockwise rotation. Counter clockwise rotation available

• Connection directions: suction left viewed from drive end, discharge radially upwards.Connections can be adjusted to meet customer requirements in 90 o increments.

• Drive end thrust bearing, double row bearing. Suction side ball bearing, grease lubrication withgrease nipples.

• Thermal expansion of the pump rotor will be balanced internally without affecting the shaft alignment.

• Shaft sealing arrangements (mechanical seal or gland packing), see page 11–12.

• Maintenance friendly design. Bearings and shaft seal are maintainable without pump disassembly.

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MP – horizontal configuration

• End-suction design provides optimum flow into the first stage impeller for best suctionperformance.

• Inducer design available for low NPSH applications when pumping volatile and warm media.Eliminates the need for a second shaft seal

• Drive end discharge, rotation clockwise viewed from drive end.

• Drive end thrust bearing, double row bearing. Grease lubrication with grease nipples.Medium lubricated slide bearing between first and second impeller.

• Thermal expansion of the pump rotor will be balanced internally, without affecting the shaftalignment.

• Shaft sealing arrangements (mechanical seal or gland packing) see page 11–12.

• Maintenance friendly design. Bearings and shaft sealing are maintainable without pumpdisassembly.

Type MPA – horizontalconfiguration, axial suction

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MPB – close coupled design• Vertical close coupled design• Standard motor according to IEC,

design V 1, up to 90 kW• Fixed coupling between pump

and motor• All axial forces taken up by motor

bearings• Medium lubricated slide bearing in

suction casing• Maintenance friendly design. Shaft

sealing maintainable without pumpdisassembly

MPV – with separate thrust bearing• Vertical configuration with separate thrust

bearing, grease lubrication with greasenipples

• Standard motor according to IEC, designV1, 90 kW to 355 kW

• Flexible coupling between pump andmotor

• Medium lubricated sleeve bearing insuction casing

• Maintenance friendly design. Shaftsealing maintainable without pumpdisassembly.

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MPB and MPV – verticalconfiguration

• Installation lengths:2950/3550 r.p.m. – max. 4 m1450/1750 r.p.m. – max. 10 m

• Separate grease lubricated thrust bearingwith grease nipples

• Standard motors according to IEC, designV1

• Flexible coupling between pump andmotor

• Drive and discharge connection alwaysabove liquid level

• Medium lubricated sleeve bearings inpump body and shaft section. Number orbearings dependant on installation length

• Suitable for variable speed control

• Mechanical seal or gland packingavailable

• Maintenance friendly design

• Suction bells, suction strainers or footvalves available

• Encapsulated design available whenpumping hot or volatile media

• Inducer design available for low NPSHapplications when pumping volatile andwarm liquids.

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MPVS – vertical wet pit design

Seal chamber dimensions in compliance with ISO 3096.Mechanical seals of all brands that comply with thisstandard and EN 12756, version “k” can be used withoutmodification of the standard parts.

The taper bore type seal chamber is self venting andguarantees optimum lubrication and cooling of the sealfaces.

Shaft seal options

Single mech. seal, design Uunbalanced up to max. 16 bar

Single mech seal, design Bbalanced up to max. 55 bar

For more detailed information about operational limitswith regard to material configuration and operationconditions please refer to data sheets or actualquotations.

The availability of gland packings is limited to max.operation pressure of 25 bar.

Above 25 bar operation pressure only mechanical sealsare available.

Gland packing

Mechanical seal

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Cartridge mechanical sealCartridge seals are pre-assembled units that guaranteetrouble free mounting as well as reliablity. Cartridge sealsalso minimize the maintenance costs when changing theseal.

Single mechanical seal cartridge,also available with Quench.

Double mechanical seal cartridgewith connection for externalflushing.

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Materials

MaterialCode

Impeller DiffuserStage

casingsSuctioncasing

Dischargecasing

Casingwear rings

ShaftShaft

sleeves

Standard materials

111 0.6025 0.6025 0.6025 0.6025 0.60251) 2) 1.4021 1.4021

211 2.1050.01 0.6025 0.6025 0.6025 0.60251) 2) 1.4021 1.4021311 1.4408 0.6025 0.6025 0.6025 0.60251) 2) 1.4021 1.4021532 1.4408 1.4408 1.4408 1.4408 1.4408 1.4410 1.4462 1.4462

Material options141 0.6025 0.6025 0.7040 0.7040 0.7040 2) 1.4021 1.4021341 1.4408 0.6025 0.7040 0.7040 0.7040 2) 1.4021 1.4021151 0.6025 0.6025 1.0619 1.0619 1.0619 2) 1.4021 1.4021351 1.4408 0.6025 1.0619 1.0619 1.0619 2) 1.4021 1.4021

1) At discharge pressure > 40 bar discharge casing standard of 0.7040

2) Optional casing wear rings made of 1.4410 possible

Elastics (o-rings) EPDM for hot water up to 140 o C, optional VITON(Pay attention to operational limits and chemical resistance)Temperature and pressure operating limits depending on the material version, please refer to techn. data sheets.

Mechanical seal materials

Standard materials

Comparison of various standards

DIN Code Mech. seal Stationary ring Elastics Metal partsBQ 1 EGG Carbon 1) SIC 2) EPDM 1.4571

BQ 1 VGG Carbon 1) SIC 2) Viton 1.4571

Q1 Q1 VGG SIC 2) SIC 2) Viton 1,4571

Application limits regarding pressure, temperature and speed as well as chemical resistance refer to data sheets oractual quotations.

1) Carbon resin impregnated2) Pure silicon carbide (without free silicone)

Optional materials upon request.

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EN (DIN) ISO BSI (UK) AISI ASTM0,6025 EN-GJL-250 (GG 25) 185/Gr. 250 1452 Gr. 220 A 278 Class 300.7040 EN-GJS-400-15 (GGG 40) 1083/400-12 A 536 Gr. 60-40-181.0619 GP 240 GH (GS-C 25) 1504 161 Gr. 480 A 216 Gr. WCB

2.1050.01 G-CuSn10 B 584 C 907001.0421 X20Cr13 683-13-4 970 420 S 37 420 A 276 Type 4201.4408 G-X6CrNiMo 18-10 3100-316 C 16 CF8M A (351) 743 Gr. CF8M1.4410 X2CrNiMoN25-7-41.4462 X2CrNiMoN22-5-3 1503 318 S13 A 276 S31803

Available accessories:

• baseframes• couplings• coupling guards• motors• minimum flow valves• speed control• special accessories to meet

customer requirements on motors

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Multistage pumps in multioutlet design can be fittedwith a random number of discharge connections. Thepumps are predominantly used in fire fightingapplications to serve different pressure zones withdifferent pressure levels.Multioutlet configurations are available for allhorizontal and vertical MP designs.

Pumps with more thanone discharge

Vertical close coupled pumps withTechnovarTechnovar is a programmable pump controlsystem which incorporates a frequency inverter aswell as control logic and is directly attached tothe pump motor.Power range: from 2.2 to 22 kWWall mounted version up to 45 kWEasy handling and installation, no separate panelrequired.Technovar is able to control pressure, differentialpressure or flow.

1. Constant pressure controlPump stops immeditaley at zero flow.

2. Following a system curveWithout using any different devices the Technovarwill adjust the speed of the motor to follow a presetand programmable system curve. System pressure isincreased depending on the actual flow rate.

3. Constant flow controlThe sensor used can be either a flow meter or adifferential pressure transmitter in combination withan orifice plate. Technovar can be set according to thetype of sensor used and will keep the flow rate in thesystem constant.

Direct controlShould a super-posed control system be installed,Technovar's frequency inverter can still be used,even though its other functions are closed down.

External communicationTechnovar can communicate with up to four pumpswith the help of an RS 485 interface. Again the systemis self-sufficient without the need of additional equip-ment:

– automatic cycling– starting/stopping of pumps according to system– changing of pumps in case of a failure

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Everything you need for yourwater supplyAs one of the world’s leading manufacturersof pumps and providers of fluid handlingtechnology, Flygt can provide you withcomplete pumping solutions. From planningand delivery, through installation and after-sales service, Flygt’s competence is at yourservice.Through our products and services, engineers,planners and consultants have access to morethan 100 years of experience, assuring themost reliable and cost-effective operation.Flygt service and sales facilities are found inmore than 130 countries worldwide.