nessie® pumps type pah 2/4/6.3, 10/12.5 25 ... -...

05-2006 DKCFN.PD.010.A6.02 521B0835 Nessie®isatrademarkofDanfossA/S

Data Sheet

Nessie® Pumps type PAH 2/4/6.3, 10/12.5 25/32 and PAH 50/63/70/80

PAH2/4/6,3,10/12,5,25/32and50/63/70/80arepumpsdesignedtosupplywaterflowunderhighpressure.Thepumpsarebasedontheaxialpistonprincipleenablingaverylightandcom-pactdesign.

Thepumpsaredesignedsothatlubricationofthemovingpartsinthepumpsisprovidedbythewateritself.Nooillubricationisthusrequired.

PAH 25/32 cross-section

Generally Allpartsincludedinthepumpsaredesignedtoprovidelongservicelife,i.e.longservicelifewithaconstantlyhighefficiencyandmininumofservicerequired.Thepumpsarefixeddisplacementpumpswheretheflowisproportionaltothenumberofrevolu-tionsoftheinputshaftandthepumpdisplace-ment.

1: Shaftsealing2: Mountingflange/ housingwithbearing3: Retainingring4: Piston/shoe5: Valve/thrustplate6: Swashplate7: Cylinderbarrel 8: Spring 9: Portplate10: Connectingflange

2 DKCFN.PD.010.A6.02 521B0835

Data sheet Nessie® Pumps type PAH 2/4/6.3, 10/12.5 25/32 and PAH 50/63/70/80

Benefits

Application examples

Code numbers

Technical data

• Verycompactandlightpump(canbeinstalledwithdirectcouplingtoanelectricmotor/combustionengine.)

• Generatesinsignificantpulsationsinthepres-sureline.

• Nopreventivemaintenancerequired (noperiodicservicelikee.g.changeoflubri-

cantandwearparts).

• Longservicelife• Allpartsofthepumparemadeofnon- corrosivematerialandthesurfaceiseasyto

clean• Fewwearingparts

Pump size Stainless steel Aluminium housing

PAH2 180B0024 N.A.PAH4 180B0022 N.A.PAH6.3 180B0023 N.A.PAH10 180B0008 N.A.PAH12.5 180B0007 N.A.PAH25 180B0036 N.A.PAH32 180B0037 N.A.PAH50 180B0047 N.A.PAH63 180B0040 180B0017PAH70 180B0042 N.A.PAH80 180B0041 180B0018

1) Forhigherpressure,pleasecontactDanfossSalesOrganization.2) Intermittentpressureis<10%everyminute.3) Peakpressureis<1%everyminute.4) Forhigherorlowerspeed,pleasecontactDanfossSalesOrganization.5) Flowatmax.pressurecontinuously.

• Stationaryandmobilehydraulicsystems• Highpressuresystems• Firefighting

• Flushingandcleaningprocesses• Humidificationsystems

PAH pumps, standard version 2 4 6.3 10 12.5 25 32 50 63 70 80

Geometricdisplacement cm3/rev. 2 4 6.3 10 12.5 25 32 50 63 70 80Max.pressure.cont.1) bar 140 140 140 160 160 160 160 80 160 160 160Max.pressure.intermittent2) bar 160 160 160 180 180 180 180 100 180 180 180Max.pressure.peak3) bar 200 200 200 220 220 220 220 140 220 220 220Max.speedcont.4) min-1 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800Min.speedcont.4) min-1 700 700 700 700 700 700 700 700 700 700 700Max.flow.cont.at1500min-15) l/min 2 5 8.5 13.5 17 35 45 72 87 97 112Max.powerrequirementat1500min-1 kW 0.9 1.7 2.5 4.3 5.3 10.5 13.5 11 26 29 33Weight,stainless/alu kg 4.4 4.4 4.4 7.7 7.7 16 16 31/26.5 31/26.5 31/26.5 31/26.5

DKCFN.PD.010.A6.02 521B0835 3


Total efficiencies, standard pumps

Suction pressure

Temperature

Shaft load

Aboveefficienciesaretypicalaveragevalues.

PAH 4/6.3 PAH 10/12.5

PAH 25/32 PAH 63/70/80

Fluidtemperature:• Min.+3°Ctomax.+50°C atmax.cont.pressure• Min.+3°Ctomax.+60°C atmax.100bar.

Ambienttemperature:• Min.+0°Ctomax.+50°C.

Storagetemperature:• Min.-40°Ctomax.+70°C.

Foroperationatlowertemperaturesthan+3°C,pleaseseetheparagraphonantifreezeprotec-tionandcontactDanfossSalesOrganizationforWaterHydraulics.

ForoperationathighertemperaturespleasecontactDanfossSalesOrganizationforWaterHydraulics.

Thepumpisneithertobeexposedtoaxialnorradialloads.Wethereforerecommendtouseaflexiblecouplingforconnectiontotheelectricmotororthecombustionengine.

Watersupplytothepumpiseithermadefromatankplacedabovethepumpordirectlyfromthemains.Thepressureatthepumpinlet(T)mustbeintherange:0-4bar(atm).

Ifhigherboostpressureisrequired,pleasecontactDanfossSalesOrganizationforWaterHydraulics.

4 DKCFN.PD.010.A6.02 521B0835


Noise level

Filtration

Installation

Theappliedwatermustbefilteredthrougha10µmabs.,β10-value>5000filter.

Inclosedsystems(hydraulicsystems),wherethewaterisledbacktotankforrecirculation,thefiltermustbeplacedinthereturnline.

Inopen-endedsystems(continuoussupplyof”fresh”water)thefiltermustbeplacedbeforethepumporthetanktoensurecontinuousfiltration.

Forfurtherfilterdetails,pleasecontacttheDanfossSalesOrganization.

Inordertoeliminatetheriskofcavitation,aposi-tiveinletpressureshouldalwaysbemaintainedbyobservingthefollowingguidelines:

1)Placethetankabovepumpinlet(water levelinthetankshouldalwaysbeabovethe

pump).

2)Placefilterinthereturnlineandnotinthesuctionline.

3)Dimensiontheinletlinewithminimum pressuredrop(largeinternaldiameter, minimumlengthofpipe,avoidbends,and

fittingswithsmallinternaldiameter.)

1. Closed hydraulic systems, recirculating water via tank.

Sincethepumptypicallyismountedonabellhousingorframe,thenoiselevelcanonlybedeterminedforthecompleteunit(system).Itisthereforeveryimportantthatthepumpismountedcorrectlyonaframewithdamperstominimizevibrationsandnoise.Furthermorethepumpdischargeshouldbeconnectedwiththeapplicationi.e.withaflexiblehigh-pressurehose.

Thenoiselevelisinfluencedby:• Thespeedofthepump,highrpmcreatemore

noisethanlowrpm• Thedischargepressure,highpressuregenera-

tesmorenoisethanlowpressure• Rigidmountingofthepumpgeneratesmore

noisethanflexiblemounting• Pipemountingdirecttothepumpincreases

thenoiselevelcomparedtoaflexiblehose

DKCFN.PD.010.A6.02 521B0835 5


Installation

Inordertoeliminatetheriskofcavitation,aposi-tiveinletpressureisalwaystobemaintainedatmin.0,9barabs.andmax.5barabs.

1)Placethefilterinthewatersupplylinebeforethepump.

2)Placeamonitoringpressureswitchsetatmin.0,9barabs.betweenfilterandpumpinlet.Themonitoringswitchmuststopthepumpatlowerpressurethanmin.0,9barabs.

2. Open-ended systems with water supply from tank.

Inordertoeliminatetheriskofcavitation,aposi-tiveinletpressureshouldalwaysbemaintainedbyobservingthefollowingguidelines:

1)Placethetankabovepumpinlet(water levelinthetankshouldalwaysbeabovethe

pump).

2)Placefilterinthewatersupplylinebeforethetank.

3)Dimensiontheinletlinewithminimum pressuredrop(largeinternaldiameter, minimumlengthofpipe,avoidbends,and

fittingswithsmallinternaldiameter.)

3. Open-ended systems with direct water supply

6 DKCFN.PD.010.A6.02 521B0835


Mounting

Water

Belowfigureillustrateshowtomountthepumpandconnectittoelectricmotor/combustionengine.

A: FlexiblecouplingB: BellhousingC: Motorshaft

Ifalternativemountingisrequired,pleasecontactDanfossSalesOrganizationforfurtherinforma-tion.

Toensureeasymountingoftheflexiblecouplingwithoutusingtools,thetolerancesmustbedimensionedaccordingly.

Makesuretoobservetherecommendedmount-ingtolerancesfortheflexiblecouplingused,asanyaxialloadontheshaftmustbeavoided.

Qualityofwaterregardingpurityandchemi-cal/microbiologicalcompositiondependsontheoriginofthewaterasdescribedbelow.

Qualityofwaterforhydraulicsystemsisre-commendedtobeofatleastsamequalityasisrequiredfordrinkingwater.

Classification of water:Waterusedintapwaterhydraulicsystemsmaytypicallybeclassifiedinto3maingroups:

A) Raw waterRawwaterismostoftenwatercollecteddirectlyfromborings&wells.Usually,waterisexposedtoa”simple”process,suchasfiltration.Thequalityofrawwatermayvaryalot.Insomecases/placesitisalmostofdrinkingwaterquality,whereaswaterinothercases/placesmaycontainlargeamountsofochre,humus&plantremnants.

Therefore,itismostimportanttoanalyserawwaterintendedforacertainapplication.Typicalapplicationswhererawwatercanbeusedare:

• Fire-fightingequipment• Highpressurecleaner

Thefiltercapacityisanimportantparameterfortheseapplications,asthewatermaycontainlargeamountsofparticles,sand,ochreetc.

B) Drinking waterDrinkingwaterisexposedtoamuchmorecom-plexcleaningprocesscomparedtorawwater.Drinkingwateriseitherproducedonbasisofgroundwaterorsurfacewater(riversandlakes).Localauthoritiesareinchargeofcontrollingthewaterquality.

GroundWater:Thequalityofgroundwaterisnormallyveryfineandthusonlyminimumofprocessingisrequired.Typically,onlyfiltrationandventilationisappliedtoremoveaggressivecarbondioxide,ironandmanganese.

SurfaceWater(LakesandRivers):Inadditiontotheaboveprocessforgroundwater,itisessentialtodisinfectandprocessthiswaterfurther,assurfacewateriseitherchemi-callyormicro-biologicallycontaminated.Typi-cally,compoundsofchlorineareusedtodisinfectthewaterwhichmaygivethedrinkingwaterthecharacteristicafter-tasteofchlorine.Furthermore,UV-lightmaybeusedtosubstituteorsupplementthechlorineprocessing.

NB!Alwaysusedrinkingwaterfromthecold-watertaptominimizetheriskofmicrobiologicalcon-taminationofthewater.

DKCFN.PD.010.A6.02 521B0835 7


Water C) Technical WaterTechnicalwatermaybedividedinto3groups:

• Softenedwater(cationexchanged).• Demineralizedwater (Demineralized/de-ionizedwater)• Waterprocessedaccordingtothereverse

osmosisprinciple(RO-water)

Softened*anddemineralized*waterarenottobeusedfordrinkingwaterinmostEuropeancountriesasthechemicalsusedfortheprocessesareharmful/hazardoustohumanbeings.

*onlyapplyingtounitsbeingregenerative.

Descriptionsofthespecificprocessesarealwaysenclosedthesystemsformakingsoftened,dem-ineralizedandreverseosmosis-water.

WhenusingotherfluidslikeHFA,HFCetc.,pleasecontactDanfossSalesOrganization.

PumpsforTechnicalwaterarelistedinaseparateDataSheet

Ifasystemrequiresantifreezeprotection,DanfossrecommendsDOWCALNorCHILLSAFEantifreezesbothbeingabiologicallydegradableMonoPropyleneGlycol.

(DOWCALNisproducedbyPOLO).(CHILLSAFEisproducedbyATCO).

ProducersofDOWCALNandCHILLSAFErecom-mendamixtureratioofmin.30%DOWCALN/CHILLSAFEtopreventbiofilmoccurrenceinthesystemduetoDOWCALNandCHILLSAFEbeingbiologicallyde-gradable.

Thefunctionofthewatertankistocontinuouslysupplycleanwater,divertheat,removeairandtoallowforvariationsofthewatervolume.

Minimumtankcapacityisdimensionedaccord-ingtothevolumerequiredforwatercooling,volumerequiredforcylinders,andrequestforwaterexpansion.Normally,atankcapacityof1-3timesthepumpflow(permin.)willbesufficientforclosedsystems.Foropen-endedsystemstherequirementis>0,7timesthepumpflow(permin.)aslongasthereisawaterrenewalof>15%ofthepumpflow.

Directthesuctionlinetothepumpbottom,approx.1.5timesthesuctionlinediameter“D”abovethebottomtopreventprecipitatedimpuri-tiesfrombeingsuckedin.Alwayskeepalltankconnections(suction,drainandreturn)belowwaterlevelinthetank.Drainandreturnlinestobeplacedasfarfromthesuctionlineaspossibleandpreferablyseparatedbyadividingplateinthetank.Besides,thesuction,drain,andreturnlinesmustbecutina45°angle(seeexample).

Antifreeze protection

Tank

Clockwise(CW)seenfromthepumpshaftend(illustratedbyaPAH10/12.5).

ForCCWrotationpleasecontactDanfossSalesOrganizationforWaterHydraulics.

Direction of rotation

8 DKCFN.PD.010.A6.02 521B0835


Disconnection:IftheinletlinetothepumpT-portisdiscon-nectedfromthewatersupply,thepumpwillbeemptiedofwater.Beforestartingthepumpagain,thestartingproceduredescribedintheStart-up-paragraphmustbefollowed.

Transport and Storage PrecautionsIfemptiedofwater,thesystemmustbepro-tectedagainstcorrosionwithaglycolmixture(minimum35%monopropyleneglycol).

Theprotectionmustbemadewithin2daysaftertheemptying.

Ifthereisriskofexposuretotemperaturesbelowthefreezingpointduringtransportorstorage,thesystemlikewisehastobeflushedwithaglycolmixture(minimum35%monopropyleneglycol).

Forfurtherinformationonanti-freezemedia,pleasecontactDanfossSalesOrganization.

Recommended procedure:1. Closedhydraulicsystemswithrecirculating

waterandopen-endedsystemswithwatersupplyfromtank:

1.1 Emptythesystemofwater 1.2 Fillglycolmixtureontothesystemthrough

a10µmabs.filter 1.3 Startupthesystem.Remembertobleed

thepump,ifrequired. 1.4 Requiredfunctionsareactivatedtobe

flushedwiththeglycolmixture 1.5 Surplusglycolisemptiedoffthesystem 1.6 Thepumpisnowprotectedagainst

internalcorrosionandfrost.

2. Open-endedsystemswithdirectwatersupply:2.1 Disconnectthewatersupplytothe pump/system.

2.2 Emptythepumpthroughthelower bleedingplug.Retightentheplugwhen thepumpisempty.

2.3 Connectthepumptoatankwithanti- freezeadditive.Connectahosetothe pumpP-portandtheotherendofthe hosebacktotank.

2.4 Quicklystartandstopthepump. Makesurethatthepumpdoesnotrun

dry. 2.5 Emptypumpofanti-freezemedium

(throughthelowerbleedingplug). Remountandretightenthebleeding plug,whenthepumpisempty.

2.6 Thepumpisnowprotectedagainst internalcorrosionandfrost.

Start-up: Thesystemhastobeflushedpriortostart–uptoremovepossibleimpuritiesfrompipes,hosesetc.Beforestartingthepump,thetopbleedingplug”C”isloosened.Whenwaterappearsfromthebleedingplug,thepumpisfilledwithwater,andtheplugisretightened.Makesurethatrotationdirectionofthepumpiscorrect.

Withitsinletlineconnectedtothewatersupplyorthetank,thepumpisnowstartedwithopenoutletP-port.Attheinitialstartofthesystem,thepumpshouldberunwithoutpressureforabout5minutestoremovepossibleimpuritiesfrompipes,hoses,etc.

Hydraulicsystemsmustbeflushedwitha3%cleaningagent-solutionformin.60minutes.Thenthesolutionisdischargedfromthesystemwhichissubsequentlycleanedwithpurewaterformin.30minutes(pleaseseeinstructionsfor”CleaningofWaterHydraulicSystems”.Finallythefilterischanged.

Safeguarding of Pump during Operation:Whenrunning,thepumpmustalwaysbecon-nectedtothewatersupplytopreventthepumpfromrunningdry.

Insystemswithwatertankitisrecommendedtobuildinalevelgaugewhichwillmakethepumpstopattoolowwaterlevel.

Inopen-endedsystemswithouttankitisrecom-mendedtobuildinapressureswitchbetweenfilterandpumpT-porttomakethepumpstopatmin.0.9barabstopreventthepumpfromrunningdry.

Forallsystemsitisrecommendedtoinstallatemperaturegaugeforstoppingthepumpwhenthetemperatureexceeds50°C.

Filter:Afterstart-upitisrecommendedtochangefilterelementafter1-10hours’operation.Subse-quently,thefilterelementischangedwhen‘cloggedfilter’isindicated.

Operation

DKCFN.PD.010.A6.02 521B0835 9


Examples of waterhydraulic systems

Stationarywaterhydraulicsystem

Mobilewaterhydraulicsystem

10 DKCFN.PD.010.A6.02 521B0835


Dimensions for PAH 2, PAH 4 and PAH 6.3

Dimensions for PAH 10 and PAH 12.5

P: PressureconnectionG1/4,11deepT: TankconnectionG1/2,15deepC: BleedingM6,HexagonNV=4mmD: Parallelkey5×5×20,DIN6885

P: PressureconnectionG3/8,15deepT: TankconnectionG3/4,17deepC: BleedingG1/4,NV=6mm,14deepD: Parallelkey5×5×20,DIN6885

DKCFN.PD.010.A6.02 521B0835 11


Dimensions for PAH 25 and PAH 32(Stainless steel) in mm


Dimensions for PAH 63, PAH 80 in standard version (Alu-minum housing)

P: PressureconnectionG11/4,23deepT: TankconnectionG11/2,23deepC:BleedingG3/8,NV=8mm,14deepD:Parallelkey10×8×45,DIN6885

12 DKCFN.PD.010.A6.02 521B0835 ProducedbyDanfossIndustriService-Advertising06.05FO/Bi.E


Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies toproducts already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

DK-6430 NordborgDenmark

Dimensions for PAH 50, 63, 70 and 80 in stainless steel version


nessie® pumps type pah 2/4/6.3, 10/12.5 25 ... -...

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