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CentrifugalPumps©AlfaLavalSlide2LKH-FamilyUltraPureSelfPrimingStandardMultistageHighPressureHighInletPressure©AlfaLavalSlide3LKHPumpsPerformance•Flowupto520m3/h•Pressureupto19bar©AlfaLavalSlide4LKH5and80©AlfaLavalSlide5LKH-FamilyModelMaxFlowMaxHeadMaxInletPressureMaxTempSealTypem3/Hr(m)BarDegCStandardLKH50011010140ExternalLKHI2308016140InternalLKH-UP908010140ExternalLKH-SP857510100ExternalLKHex2308010140ExternalLKHP2308040140InternalLKHmultistage7019010140Internal©AlfaLavalSlide6LKH©AlfaLavalSlide7LKHAdaptorBackPlateImpellerPumpShaftPumpCasingORingMechanicalShaftSealComponentsPumpCasing©AlfaLavalSlide8SanitaryDesign©AlfaLavalSlide9PumpOperationPrincipleProductinProductout©AlfaLavalSlide10TheLKHPumpCasingThickermaterialallowshigheroperatingpressuresOptimizedimpellervanedesign=VerylowNPSHrandlownoiselevel.CloseTolerances,0,5mmBackplate:11mmCasing:8mm©AlfaLavalSlide11Impellerdesign•Semi-Openimpellerdesign•Frontedgeofimpellervaneininletmakesliquidrotatebeforeenteringthepump-whichgiveslowNPSHr•Gentleproducttreatmentduetosmoothdesign–closetolerances.•Impellerscrewasanoption•Threadedconnectiontoshaft©AlfaLavalSlide12ImpellerImpellerscre©AlfaLavalSlide13ProductWettedPartsMaterials:•StainlessSteelAISI316L(DIN1.4404)Elastomers:•AccordingtoFDA(Food&DrugAdministration)•EPDM•NBR•FPM•FEP(PTFE)©AlfaLavalSlide14CasingSealing©AlfaLavalSlide15CasingSealingPumpCasingO－Ring©AlfaLavalSlide16LKHAdjustableRange360flexibilitywithfixedposition(6bolts)security!©AlfaLavalSlide17LKHAdaptor•FitsallIECframedmotors•1.5kWto37kW•Theadapterisstainlesssteelasstandard•ModulardesignPumpBackplate1.5Kwmotoradaptor37Kwmotoradaptor©AlfaLavalSlide18TheLKHStubShaftSameonallstubshafts1,5kW–37kW(IEC)StubShaftCompressionCoupling•Compressionbushingtype•6symmetricallylocatedscrewsMotorMotorShaft©AlfaLavalSlide19MechanicalSealsVerythinFilmofProductApprox.0,001mmStationarysealRotaryseal©AlfaLavalSlide20MechanicalSealsRemember-Sealfacesuseproductforlubricationandcooling.RotarysealStationarysealDryRunning!!!!!!!FrictionHeatWear©AlfaLavalSlide21TheLKHShaftSeal•IdenticalsealforallmodelsLKH5-60•Availablein3versions-Single-Flushed-Doublemechanical•Easyconversionfromsingletoflushedordoublemechanicalshaftseal©AlfaLavalSlide22AllSealsFitAllPumpsFrontLoaddesignSingleflushedDoubleflushed40506035452015255-10LKHSingle31.75mm(32mm)SingleSingleflushedDoubleflushed80907040mm©AlfaLavalSlide23SingleShaftSealRotatingSealSiliconcarbidestationarysealring©AlfaLavalSlide24SingleShaftSeal©AlfaLavalSlide25MechanicalBalancedShaftSealMechanical:Stat./rot.,ring,spring,etcBalanced:Independentoffluidpressure©AlfaLavalSlide26FSS/DMSUSEDwhenproductorapplicationincludesanyofthefollowing:•Sticky/hardeninginair•Burningon•Crystallizing•Abrasive•Hightemperature•Barrier-Water/Steam©AlfaLavalSlide27FlushedShaftSealTeflonlipsealFlushmedium0,25–0,5l/mMax.1barpressureHardsurfacecoateddrivering©AlfaLavalSlide28©AlfaLavalSlide29•注水机械密封•可以形成一个注水屏障，如果系统中有真空出现，可以避免气体中的物质透过机械密封污染产品。©AlfaLavalSlide30DoubleMechanicalSealSiliconCarbideFlushmedium0,25–0,5l/mMax5barProduct©AlfaLavalSlide31LKHExternalShaftSeal-FAB:sFeaturesAdvantagesBenefitsExternalshaftsealLesspartsincontactwithproduct–easytocleanHighproductqualitySmallsealdiameterLowvelocity–lesswearLifetimeincreasedSealvisiblefromoutsideSealleakageeasytodetectLessriskforbacteriagrowthSamesealsizefitsLKH5-60OnlyonesealsizetokeepinstockReducedinventorycostEasytochangeshaftsealShortproductionstopMoreproductiontimeLowmaintenancecost©AlfaLavalSlide32LKHExternalShaftSeal-FAB:sFeaturesAdvantagesBenefitsBalancedshaftsealNotaffectedbypressurevariations.Ultimatesecurity©AlfaLavalSlide33LKHDesign-FAB:sFeaturesAdvantagesBenefitsAllproductwettedpartsinmaterial316LCompatibleformostfluidsCanbeusedformostapplications.ZerodeadzonesEasytoCIPHighproductqualityOpenimpellerdesignGentleproducthandlingHighproductqualityStainlesssteeladapterNocorrosionHygienicSmoothsurfacesEasytoCIPHighproductquality©AlfaLavalSlide34LKHDesign-FAB:sFeaturesAdvantagesBenefitsSmallgapbetweencasing/impeller/backplateHighefficiencyLowshear–gentleproducthandlingLowerpowerconsumptionHigherproductqualityLowrequiredNPSHVerygoodinvacuumapplicationsAvoidcavitationCheaperinstallationLowrequiredNPSHNoneedforinducerLowerinvestmentcost©AlfaLavalSlide35LKHUltraPurePump•CentrifugalPumpsfortheinternationalHighPurityMarket•ConnectionsaccordingtothenewHighCleanBioPharmandUSBPEstandards©AlfaLavalSlide36LKHUltraPurePumpFeatures•Selfv