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� 4300Catalog Triple-Lok 37�FlareTubeFittings Triple-LokIntroduction Parkerpioneeredtheflarefittingconceptearlyinthe20thcentury. Thedesignhassincegainedworldwideacceptanceduetoit's manyinherentfeaturesandcustomerbenefits.Today,the37� flarefittingitisthemostwidelyusedfittingintheworld.Itsappeal isinitssimplicity,compactdesign,easeofassembly,reliability (singleseal),materialavailability,adaptabilitytoinchormetric tube,worldwideavailabilityandacceptance.Furtherhelpingits acceptanceisitswidespreaduseasahoseadapter.Asatube fitting,itisespeciallysuitedforthinandmediumwallthickness tube.Eventhough37�flarefittingsaregenerallyconsideredto be3000psifittings,Triple-Lok'scapabilitiesrangefrom9000psi for1/4"sizeto2000psifor2"size.Currently,itisusedinvirtually everyapplicationthatusesfluidpowerformotioncontrol. Parker'sTriple-LokfittingsmeetthestrictrequirementsofSAE Fig.C1�Triple-LokFittingBody,SleeveandNut J514andISO8434-2industrystandards.Additionally,theymeet manycustomerandindustry-recognizedconformancestandards andtypeapprovals. DesignandConstruction TheTriple-Lok(37�flarefitting)designissimple.Itusesaneasily producedflareatthetubeendtosealandholdfluidunderhigh pressure.Thefittingconsistsofthreepieces:thebody,sleeveand nut.Thetubeendisflaredata37�angle(74�includedangle) andheldbetweenthefittingnose(seat)andthesleeve(sup- port)withthenutasshowninFig.C2,providingaveryeffective (single)sealbetweenthefittingnoseandthetubeflare. ThedesignofTriple-Lokfittingsisveryefficient.Thefittingincor- Smallsealareaallowsfor poratesthesmallestsealareaofallfittingtypes.Thissealarea, adequateclampingload appliedwithrelatively asseeninFig.C2,isonlyslightlylargerthanthefluidflowarea. lowassemblytorques Thesmallsealarearesultsinacompactdesign,lowassembly torque,andarelativelyhigh-pressurecapability. Seal Bearing Theprimarydifferencebetweenatwo-pieceflare fittingand Surface thethree-piecedesignistheflaresupportsleeve.Thesupport sleeveprovidesseveralkeyfunctions: Sleeve 1. Itprovidesaclampingsurfaceforthetubeflare. Flared Tube 2. Itprovidesabearingsurfaceforthetubenut.Thesleeve isolatesthetubefromthenut,minimizingthetubetwist duringassembly,acommonproblemof2-pieceflarefitting designs. 3. Itprovidessupporttothetubeflare.Thetaperedfittingnose tendsto"wedgeopen"thetubeflareduringassembly.The sleevehelpstoresistthisexpansion,thuseliminatingthe FlareSupport possibilityoftubeflareandsleevejamminginsidethenut. resisting"opening" ClampingandSeal- Thiseliminatesanywasteofappliedtorqueandallowsfor offlare ingSurfaceoftube easydisassembly. flareagainstbody nose 4. It makes the fitting adaptable to metric tube merely by Fig.C2�Triple-LokDesignandFeatures changingitsinsidediameter(seeTableC2). Duetothepopularityandsimplicityofthe37�flarefitting,many manufacturersoffertheproduct.Eventhoughmostmanufac- turersconformtothesamedimensionalstandards,thereare significant performance advantages with Parker's Triple-Lok fittingsduetoParker'soptimizedmanufacturingmethodsand commitmenttoquality. C6 ParkerHannifinCorporation TubeFittingsDivision Columbus,Ohio http://www.parker.com/tfd
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