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1、Unit5AirFilters,PressureRegulators,andLubricatorsTheaircompressorandthevariouscomponentsthatarelocatednearthecompressorwerediscussedinapreviouschapter.Thecompressorsystemmayinclude,inadditiontothecompressor,anafter-cooler,asafetyvalve,awaterseparator,andareceiv
2、er.Thecompressedairleavingthecompressorsystemisthevariousdevicesfordoingwork;thesedevicesmaybeaircylinders.pneumaticmotors,orpneumatictools(Fig.l).Inawell-designedpneumaticsystem,theairmustpassthroughanairfilter,apressureregulator,andalubricatorintheline,before
3、itisdeliveredtothedeviceormachinethatperformsthework.Itissometimesrecommendedthatnotmorethantwotoolsbeservedbyasinglefilter,regulator,orlubricator,Inthischapter,thefunctions,andmaintenanceofthethreecomponents^I)airfilter;(2)pressureregulator;and(3)lubricatorare
4、discussed.Allthreecomponentsarenecessaryforefficientoperationofpneumaticsystems,anditisimportantthattheyshouldbeinstalledandmaintainedproperly.GENERALFEATURESSomeofthegeneraloperatingfeaturesshouldbepointedout.Severaldifferentworkdevicesorairtoolsmaybeconnected
5、toasinglecompressor,whichmaybelocatedatadistancefromthetools.Theremaybeperiodsoftimewhennoairisrequiredfromthecompressor.Thedistributionpipingmaybewarmduringsomeperiodsoftimeandcoldatotherintervals.Itisalmostimpossibletokeeptheairdistributionpipingfreefromdirt,
6、moistureorcondensate,pipecompound,pipescale,emulsifiedanddeterioratedcompressoroil,andrust.FgI.Compress«d
7、s,variousamountsofimpuritiesmaybefoundintheairdistributionlines,Foreignmatterinthecompressedaircandorealdamage,causingasystemtobecomeinoperative.Foreignmattercanclogthevalveportsanddamagethevalvepartsandotherclose-fittingpartsinairtools,airmotors,pistons,andoth
8、erdevices.Forexample.pipescalewhichconsistslargelyofironoxideisextremelyabrasive;itcanscorethevanesinairmotorsandanyothersurfaceswithwhichitcomesincontact.Deterioratedoilfro