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� 4300Catalog Intru-Lok FlarelessBiteTypeFittings PressureRating Introduction Thecontactofthetuberidgewiththeferrule'sfrontfaceandbite TheIntru-LokbitetypefittingwasdevelopedbyParkerHannifin edgegivesthefittingitsabilitytoretainpressurewithoutleaking andintroducedtotheU.S.marketinthelate1950's.Thisfitting orblowingoff.Whenproperlyassembledtotherecommended addressesthoseapplicationsthatrequireabitebytheferrule tubing,Intru-Lokfittingswillconsistentlysealupto1500psi inbrass,copper,aluminumandplastictubingsystems.The workingpressureinallsizes. Intru-Lokfittingisaflarelessfittingthatconsistsofabody,a one-pieceprecision-machinedferrule,andanut.Onassembly, theferrule"bites"intotheoutersurfaceofthetubewithsufficient strengthtoholdthetubeagainstpressure.Theferrulealsoforms apressuresealagainstthefittingbody. Intru-Lokfittingsallowthefittingassemblertovisuallyinspect thebitequality,thussignificantlyminimizingtheriskofimproper assemblyandrelatedserviceproblems. Intru-Lok fittings are routinely used in markets, such as: Machinetools,chemical,oilrefineries,papermaking,thermo- plasticsprocessing,airandlubelines,pilotlines,panelboards, etc. DesignandConstruction ThethreecomponentsofIntru-Lok fittingsaredesignedand manufacturedtoproduceareliable,leakfreejointuponas- Fig.E1�Intru-LokComponents:Body,FerruleandNut sembly. TheIntru-LokBody�Intru-Lokfittings'bodiesareavailablein overfifteenconfigurations.Theshapedproducts(i.e.,elbows, tees,andcrosses)arehotforged,thenmachinedtothestrin- Brass gentIntru-Lokfittingspecifications.Straightproductsaremade Intru-LokFittings fromcolddrawnbarstock.Thecolddrawingoperationensures ASTM Type consistentlytightdimensionaltolerances,aswellassignificantly ForgedBodies B124 CA377 improvedstrength. TheIntru-LokFerrule�Intru-Lokfittingferrulesareprecision B16 CA360 machined with all dimensions and surfaces, particularly the BarStockBodies B453 CA345 criticalbiteedge,monitoredonanongoingbasis. TheIntru-LokNuts�Intru-Lokfittingnutsaremachinedfrom BarStockTubeNuts B16 CA360 colddrawnbarstock.Thecolddrawingoperationprovidesa moretightlypackedgrainstructure,thusimprovingthematerial's TubeFerrules B16 CA360 strength. In addition, cold forming significantly improves the fatiguepropertiesorendurancelimitsofthenuts. TableE1�StandardMaterialSpecificationsfor Intru-LokFittings HowIntru-LokFittingsWork Inassembly,theferruleisdrivenforwardonthetubebythe nutduringpre-set.Astheferrulemovesforwarditcontactsthe taperedseatareaofthebody,whichcausestheferruletocam inwardintothetube.Theleadingedgeoftheferruleisthusable tomakeaclean360degreecutintotheoutsidediameterofthe tubing.Thiscutinthetubingisoftenreferredtoasa"Bite";thus theterm:BiteTypeFitting.Astheferrulemakesitsbite,asmall ridgeoftubematerialisraisedupinfrontoftheferrule. AssemblyandInstallation PleaserefertoSectionTfortheassemblyandinstallationin- Fig.E2�AssembledIntru-LokFitting structionsforIntru-Lokfittings. Dimensionsandpressuresforreferenceonly,subjecttochange. E3 ParkerHannifinCorporation TubeFittingsDivision Columbus,Ohio http://www.parker.com/tfd
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