德国HAWE液压压力公式
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德国HAWE液压压力公式SealsAnyquestionaboutthecompatibilitywithsealmaterial首ldbesettledwiththefluidmanufactureralwaysbeforeusingacertainpressurefluid(exceptmineraloilandsyntheticesters).Aroughoverviewisgiveninthetableatthestartofthissection.HAWEutilizessealsmadeofthefollowingmaterialsasstandard:NBR(acrylonitrilerubber,e.g.Bunan,Perbunan)orHNBR(hydratedNBR).Somedevicesareavailableonrequestwithsealsmadeof:FPM(alsoFKM,fluorrubber)e.g.forfluidstypeHFDThecoding...-PYD首ldbeaddedtothecodingforHAWEdevices,e.g.WN1H-G24-PYDEPDM(ethylenpropylenrubber)e.g.forSKYDROLorbrakefluidorSBR(styrene-butadienerubber)e.g.forbrakefluid(notsuitableforSKYDROL!)Thecoding...-AT首ldbeaddedtothecodingforHAWEdevices,e.g.WN1H-G24-ATGeneralinformation2.Pressurefluids2.1MineraloilsTheoperationbehaviorofahydraulicapplicationmainlydependsonthequalityoftheutilizedpressurefluid.Theselectionofthepressurefluidisdeterminedbytheoperatingconditionsofthesystemsuchas:'Temperature(seeviscosityclassification)'Nomenclature(somepressurefluidsmaybeunacceptablebecauseofundesiredreactionswithmetals,sealsetc.)'Kindofapplication(e.g.ecologicallycompatiblepressurefluids)'Associatedfield(Useofalreadyavailablepressurefluids)PressurefluidsHLP(DIN51524part2)Mineraloilwithadditivesimprovingcorrosion,oxidationandwearprotectionPressurefluidsHL(DIN51524part1)MineraloilwithoutwearprotectingadditivesPressurefluidsHVLP(DIN51524part3)MineraloilwithsameadditivesasHLP,butwithincreasedviscosityindexforuseinhighertemperaturerangesUndopedoilHe.g.-Lubricatingoils(DIN51517Part1)-whiteoil(e.g.USDAH1)MineraloilwithoutadditivesSpecialfluidsforaviation(MILH-5606)foroff-shoreapplications(NATOH540)MineraloilsarebasedasaruleonnaphtenicbasedoilwithwidetemperaturerangeOthermineraloilsEngineoilstypeHD(e.g.DIN51511)AutomatictransmissionfluidtypeATF(AQASuffixA)Oilsformanualtransmissionsofvehicles(e.g.DIN51512)TestoilfordieselinjectionpumpsMineraloilswhichactuallyweredevelopedforotherapplicationpurposesPressurefluidCharacteristicsCommonhydraulicoilNowearprotectionadditivesthereforenotsuitableforgearpumps.HAWE-pumpstype:Z,RZ,MP..-Z,HK..ZObservemanufacturer’sspecificationsforotherdevices!Additivesimprovingtheviscosityindexshowdrawbacksconcerninge.g.shearstrength(viscositydropduringloadby30%),falloutofwaterandair.Useonly,iftemperaturerangerequiresthis.Observefluidmanufacturer’sspecification!Onlyforsystemsforintermittentservice(S2orS3operation),duetothemissingadditives(lowlubricatingcharacteristic).Whiteoilismainlyusedinsystemsforfoodprocessing.SealsmadeofflourrubberFPMmightberequired,dep.onthepressurefluid.Observefluidmanufacturer’sspecification!Moreorlesswellsuitedpressurefluids.Observewhetheritcontainsadditivespreventingcorrosionandoxidationaswellasmaterialcompatibility(especiallywithseals).Observefluidmanufacturer’sspecificatio德国HAWE液压压力公式
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