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4300Catalog Assembly/Installation PortEndAssembly (ED)(seeFig.T2)andarerecommendedforhigherpressures PortEndAssembly thantheothertypes.Types"G"and"H"useanO-ringthatis supportedontheoutsidebyaremovableretainingring(seeFig. ThethreecommontypesofportendsusedintheUnitedStates T3).TypeB(cuttingface)isdesignedwitharelativelysharpridge withtubefittings,pipefittingsandhosefittingsare: ofmaterialthatsealsbycoiningtheflatfaceofthefemaleport 1)Parallelthread (seeFig.T4).Afourthsealingmethodusesabondedsealwhich 2)TaperedThread consistsofametalringwithanelastomerbondedtotheinside � 3)Flanges surface(oftenreferredtoasDowty seal)(seeFig.T5). ParallelThreadPorts Unliketaperedthreads,parallelthreadportsdonotrequiresealing bythethreads.Thesealisobtainedbyothermeans,typically anelastomericseal.Whenassembledproperly,parallelthread portsprovidethebestleak-freeportconnectionavailable. Parkertubefittingsareavailablewithseveraltypesofparallel threadportstuds(ends): � SAEstraightthreads(SAEJ1926/ISO11926) Fig.T2�EOlasticSeal,TypeE � ISO(ISO6149) � JIS(JISB2351) � BSPPflatface(ISO1179) � DINMetricflatface(ISO9974). TheSAEstraightthread,ISO6149andJISB2351portsare allofsimilardesign.ThemaleendisfittedwithanO-ring.On assembly,theO-ringisfirmlysandwichedbetweentheangular sealingsurfaceofthefemaleport,themaleendundercut,and theshoulderorback-upwasherofthemaleend.Sealingisthus madepossibleandmaintainedbytheO-ringcompression,which resultsfromthesandwichingoftheO-ringinthecavityasshown inFig.T1.Thestraightthreadsdonotoffersealingaction;they Fig.T3�O-RingwithRetainingRing,TypesG&H providetheresistance(holdingpower)forservicepressure.Port dimensionsforSAEandISO6149portsaregivenonpages U25andU26respectively.ForJISB2351dimensions,please contacttheTubeFittingsDivision. Fig.T4�CuttingFace,TypeB Fig.T1�SAE/ISO/JISB2351StraightThreadPortO-Ring UponAssembly TheSAEstraightthreadportisthesameasMS16142.Itis alsosimilarto,butdimensionallynotthesameas,MS33649 andAND10050,andthusnotinterchangeablewiththem. Therefore,itisnotrecommendedtousefittingsdesignedforSAE straightthreadportsinMS33649andAND10050ports. WiththeBSPPandmetricflatfaceportends,thesealingactu- allytakesplaceonthetopsurface(spotface)oftheport.Port dimensionscanbefoundonpagesU29andU30respectively. Fig.T5�BondedSeal Thereareseveralsealingmethodsavailablefortheseports. Portstudswithtype"E"sealingutilizeParker'sEOlasticseal T3 ParkerHannifinCorporation TubeFittingsDivision Columbus,Ohio http://www.parker.com/tfd
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