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4300Catalog Assembly/Installation Seal-LokAssembly Over-flangingwillresultintubenutinterference,aswellasthin- Brazing ningoftheflangetubeend.Under-flangingreducesthecontact areaforsealingagainsttheO-ringinthefitting. Brazingistheothermethodofattachingthesleevetothetube end.Thisprocesscanbeaccomplishedbyusingamulti-flame torch,asshowninFig.T21,oraninductionbrazingunit.During theheatingprocess,thepre-formedbrazeringorwire-fedfiller materialismeltedbetweenthetubeO.D.andthesleeveI.D., creatingastrongbondbetweenthetwo. Overflangedassembly Underflangedassembly Fig.T21�Multi-flametorchbrazing Fig.T20�OverflangingandUnderflanging BrazingSteps: 1. DeterminethetubelengthallowanceusingTableT13. AdvantagesofParflangeprocess TherearenumerousadvantagestousingtheParflangeprocess overthebrazeorweldprocess: � TheParflangeprocessisseveraltimesfasterthanthebraz- ingorweldingmethods.Forinstance,the1025and1040 modelsproduceflangesatarateof9to12timesthespeed ofcomparableinductionbrazing. � TheParflangeprocessdoesnotrequireanyspecialpre-or post-flangecleaningofthetubeandsleeve. � Unlikebrazing,theParflangeprocessdoesnotrequireany flux,brazealloy,postbrazecleanerorrustinhibitor.Anen- vironmentallysafelubricantappliedtotheflangingpinisthe onlyadditiveassociatedwiththeParflange. Fig.T22�Tubelengthallowance � TheParflangeprocessisinherentlysafe.Itdoesnotrequire openflameoranyformofheating.Additionally,thereisno emissionofhazardousfumes,asistypicalwithweldingand NominalTubeO.D. A brazing. Inch Metric (in.) � TheParflangeprocessusesonlyafractionoftheenergy 1/4 6 0.04 neededforweldingorbrazing. 3/8 8,10 0.04 � The Parflange process accommodates the use of plated components(i.e.,tubeandsleeve),thuseliminatingtheneed 1/2 12 0.04 toelectroplateassembliesafterfabrication. 5/8 14,15,16 0.06 � TheParflangeprocesseliminatesthepotentialforleaksat 3/4 18,20 0.06 thebrazeorweldjoint. 1 22,25 0.06 � TheParflangeprocessproducesaburnishedsealingsurface, typicallymuchsmootherthanthe125micro-inchrequirement 11/4 28,30,32 0.06 ofSAEJ1453. 11/2 35,38 0.06 TableT13�Tubelengthallow- ance Dimensionsandpressuresforreferenceonly,subjecttochange. T16 ParkerHannifinCorporation TubeFittingsDivision Columbus,Ohio http://www.parker.com/tfd
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