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ThesevaporjetpumpsareoneoftheoldestandmostreliablewaystocreateavacuumpumpingspeedPleaseuseguards,safetyEdwardsprovidesacomplete rangeofvapourdiffusionpumpsandvapourboosterstomeettheseneeds.inapressurerangeofResultThediffusionpumpisthemostcommontypeofpumpfor useinhighvacuumapplicationsMinimizedpowerrequiredandfluidcapacitytoensurelowoperatingcostGasesonthehighvacuum(inlet)sideofthepumpare capturedinthejetvaporbyDiffusionpumpsconsistbasically(seeFig)ofapumpbody(3)withacooledwall(4)andathree,fourorfive-stagenozzlesystem (AD)Allindustrialdiffusionpumpsarewater-cooledUntilthehighvacuumvalve(4)opens,bothdiffusionpumpandpumpfluidarepreservedForhazardsthat cannotbedesignedout,warnings,procedures,andinstructionsonproperuseandservicingareprovidedHowoildiffusionpumpsworkThepumpfluidvapor streamsthroughtherisertubesandemergeswithsupersonicspeedfromoildiffusionpumpsrequirecarefulmaintenanceinordertomaintainahighlevelof performanceandmaintaintheintegrityofthevacuumchamber.Excellentpumpingspeed.ResultDifusionVacuumPumps.HTSeriesPumpsThesepumpsare designedtogivehighthroughput(pressuremultipliedbypumpingspeed)atxmbarmakingthemidealforindustrialprocessesthatevolvelargequantitiesofThe diffusionpumpisthemostcommontypeofpumpforuseinhighvacuumapplicationsLowback-streamingoftheoperatingfluidEasyResultItistheidealpump fluidforhighvacuumapplicationsTheoilservingaspumpfluidisintheboiler(2)andisvaporizedfromherebyelectricalheating(1)PumpingSpeedThe pumpingspeedofanypumpisWorkingPrincipleandStructureSincethechamberitselfhasnomovingpartsasidefromtheoildroplets,avacuumdiffusionpump canoperatewithstabilityoverlongperiodsInthisdiplomathesisdealswithdiffusionpumps,asubdivisionofthevacuumkineticpumpsthatareusedforcreating, improvingand/ormaintainingavacuumTheoildiffusionpumpconsistsofapumpbody,boilerheaterandstagefractionatingjetstackassemblyDiffusionpumps Theworkingfluid(oil)isheatedintheboiler,vaporizedandstreamsoutofeachstageofthejetstackathighspeed.Thisapplicationnotewillexplainpractical stepsthatcanbetakentoensureoptimalperformanceofoildiffusionpumpsinaproductionenvironmentDiffusionvacuumpumpsareoneoftheoldesthighvacuumpumpingtechnologiesandprovidethehighestpumpingspeedattheResultHighThroughputDiffusionPumpsDRAFT//DiffusionPumpHazards DesignersofsystemsutilizingdiffusionpumpsmustdesignouthazardsResultDiffusionpumpsconsistbasically(seeFig)ofapumpbody(3)withacooledwall(4) andathree,fourorfive-stagenozzlesystem(AD)Beforeventingthevacuumchambertheforevacuumvalve(2)andthehighvacuumvalve(4)mustbeclosed, wherebythediffusionpumpremainsinthereadystatusOperatingrangeTheattainableultimatepressureisbelowmbar(xTorr)DIFFELENultraisusedinHigh ThroughputDiffusionPumpsUserManualDiffusionPumpHazardsDesignersofsystemsutilizingdiffusionpumpsmustdesignouthazardswhereverpossibleThese vaporjetpumpsareoneoftheoldestandmostreliablewaysResultFeatures.TheoilservingasResultTheoryojDi^usionPumpForadiffusionpump,thediffusion apertureistakenfortlieannularaperture(‘neck’)roundtlievapourict,throughwhichtheairis’Result3,to,l/sUndernormalenvironmentalconditions,the creationofvacuumrequiresaremovalofgases,containedinatmosphericair,fromagivenvesselorachamberwherethediffusionpumpcantakeover