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1、TechnicalPrinciplesofValvesSymbolsandCircuitFunctionsSymboltoDIN-ISO1219CircuitFunctionICircuitFunctionFThecircuitfunctionillustrationsaredefinedtotheDIN-ISO1219Standard.AABThesecanbeusedtoshowotherswitchingprocesses.Therespectivevalveportsarespecifiedbylettersinth
2、estandardwherePdefinesthePpressureport,AandBserviceportsPwhileRandSareventorexhaustports.Thenewillustrationofpneumat-2/2-waysolenoidvalve;Distributorvalve;icsisspecifiedwithnumbers.normallyclosed,flowdirectionaswhende-energized,pressureportPrequiredconnectedwithpor
3、tBCircuitFunctionThecircuitfunctionofavalveindicatesthefunctionswhichcanbeachieved.CircuitFunctionTThecircuitfunctiondefineswhetheraCircuitFunctionsof3-wayValvesvalveshuts-offorallowsthefluidflow,Awhetheralltheportsareshut-offintheCircuitFunctionCde-energizedpositi
4、on,orwhethersomeportsareclosedandothersleftAopen.PR3/2-wayvalve;forgeneralusePR3/2-wayvalve;whende-energized,portAexhaustedCircuitFunctionsof4-wayValvesCircuitFunctionsofFlowValvesCircuitFunctionGCircuitFunctionACircuitFunctionD24AB13PPR4/2-wayvalve,whende-energize
5、d,pressureport1connectedwithport2,2/2-wayvalve;3/2-wayvalve;outletport4exhaustednormallyclosedwhende-energizedportBpressurizedCircuitFunctionof5-wayValvesCircuitFunctionBCircuitFunctionECircuitFunctionHBA42PPP125132/2-wayvalve;Mixervalve;normallyopenwhende-energize
6、d,pressureportP5/2-wayvalve,whende-energized,2connectedwithportA,portPclosedpressureport1connectedwithoutlet1port2,outletport4exhausted.1TechnicalPrinciplesofValvesSolenoidValvesOrificesPressureRangesCircuitFunctionLTheorifices(DN)availablearegiveninAllpressurefigu
7、resquotedinthismmandcorrespondtothediameterofcatalogrepresentgaugepressures.thevalveseats.PressureratingsarequotedinPSI.42OurfiguresapplyforthevoltagerangePortConnection±10%.If3/2-wayvalvesareusedinadifferentcircuitfunction,thepermittedInmostcases,portswiththreadsp
8、ressurerangechanges.Careshould513basedoninch-systems(GtoISO228)betakentoensurethatthevacuumormetricthreadsareused.Manypumpisconnectedtotheoutletp
