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4300Catalog Assembly/Installation RoutingandClamping RoutingandClamping Non-preferredRouting PreferredRouting Explanation Mosthydraulic,pneumaticandlubrication system requires some form of tube line Avoidstraighttubelines. fabricationandfittinginstallationforcomple- Thereisnomarginforerrorona tion.Properfabricationandinstallationare straightline,resultinginexcess essentialfortheoverallefficiency,leakfree jointstrain. performance, and general appearance of anysystem. Thefollowingfactorsshouldbeconsidered earlyinthedesignprocess,aftersizingthe tube lines and selecting the appropriate styleoffitting: 1. Properroutingoftubelines 2. Adequatetubelinesupport(clamping) RoutingofLines Routingoflinesisoneofthemostdifficult,yet mostsignificantofthesesystemdesigncon- siderations.Properroutinginvolvesgetting aconnectinglinefromonepointtoanother throughthemostlogicalpath,whileconsider- ingotherfactorsasdiscussedbelow. The most logical path is not always the directpathandshouldhavethefollowing characteristics: Allowforexpansionandcontrac- tionoflinesbyutilizing"U"bend. � Avoidexcessivestrainonjoint --A strainedjointwilleventuallyleak.Astraight linetubeassembly(withnobends)ora jointthatisforcedintopositionarecom- monexamplesofstrainappliedtotube assemblies. � Allowforexpansionandcontraction Offset("S")bendallowsformo- --Usea"U"bendorahoseinlonglines tionunderload. toallowforexpansionandcontractiondue topressureortemperaturefluctuations. � Allowformotionunderload--Even someapparentlyrigidsystemsdomove underload.Useanoffset("S")bend. Avoidexcessivepressuredrop bygettingaroundobstructions � Getaroundobstructionswithoutus- withoutusing90�bends.One ing excessive amount of 90� bends 90�bendcausesmorepressure --Pressuredropduetoone90�bendis dropthantwo45�bends. greaterthanthatduetotwo45�bends. � Keeptubelinesawayfromcomponents Avoidcreatinganobstructionby thatrequireregularmaintenance. routinglinesaroundareasthat � Leave fittingjointsasaccessibleas requireservice.Leaveadequate clearanceforwrenches. possible--Inaccessiblejointsaremore difficulttoassembleandtightenproperly, andmoretimeconsumingtoservice. � Haveaneatappearanceandallowfor easy trouble-shooting, maintenance andrepair. Routelinestoallowforproper clamping.Whendoneproperly, The following illustrations provide several severallinescantypicallybe examplesoftypicalroutingsituations.The clampedtogether. graphicsshowthepreferredandnon-pre- ferredpathalongwithanexplanation. Routelinestoallowfortrouble- shooting.Linesthatcrossand arenotinlogicalordertendto bedifficulttoworkwithduring maintenance. T36 ParkerHannifinCorporation TubeFittingsDivision Columbus,Ohio http://www.parker.com/tfd
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