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1、TorqueoverloadprotectionValveelectricdeviceisusedtooperatethevalveandwasoneofthevalvesconnectedtothedevice.Thedeviceisdrivenbyelectricity,theirmotionprocesscanbestroke,torque,ortocontrolthesizeoftheaxialthrust.Asthevalveshouldbetheworkofelectricaldevicecharacteristicsandutilizationdependont
2、hetypeofvalves,fittingsandvalvesregulatetheworkofthepipelineorequipmentlocation.Therefore,controlvalveelectricdevicetherightchoice;considerthepreventionofoverload(workingtorquehigherthanthecontroltorque)hasbecomeessentialtotheoccurrenceofaring.Valveelectricdevicerightchoiceshouldbebasedon:1
3、.Operationtorque:Operationtorqueistoselectthemainvalveelectricaldeviceparameters.Theoutputtorqueelectricactuatorvalveoperationshouldbethegreatestmomentof1.2~1.5times.2.OperationThrust:thehoststructureofMOTORIZEDVALVEACTUATORthevalveelectricdevice,therearetwo,oneisnotconfiguredthrustplate,th
4、istimedirectlytotheoutputtorque;theotherisequippedwiththrustplate,andthistimetheoutputtorqueofthevalvestemthroughthethrustdisknutisconvertedtotheoutputthrust.3.Numberofoutputshaftrotationcircle:valveelectricactuatoroutputshaftrotationthenumberoflapsandthevalvenominaldiameter,stempitch,threa
5、dthefirstfewrelated,accordingtoM=H/ZScomputing(where:Mfortheelectricalinstallationsshouldbetomeetthetotalnumberofrotatingring;Hofthevalveopeningheight,mm;Stostemtransmissionthreadpitch,mm;Ztostemthenumberofscrewheads.)4.StemDiameter:Formulti-turntypevalvesforthenextshot,iftheelectricactuato
6、rallowsthemaximumstemdiameterofthevalvestemcannotbedispensed,itcannotbeassembledintoelectricvalve.Therefore,theelectricaldevicehollowoutputshaftdiametermustbegreaterthanspecifiedunderthevalvestemdiameter.Forsomerotaryvalves,aswellasmulti-turnvalvesinthedarkbarvalve,althoughwithoutconsiderin
7、gtheadoptionofstemdiameter,butshouldalsotakefullaccountofthematchingstemdiameterandkeywaysize,sothatworkcanbeassembled.5.OutputSpeed:valveKai,closedfast,easytoproducewaterhammerphenomenon.Shouldthereforebeunderdifferentconditionsofuse,choosetheappropriat