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1、阀门相关基础知识BasicknowledgeofvalvesValveiscontrolunitinthepipelinefluidconveyingsystem,itisusedtochangethechannelcross-sectionandf1owdirectionofmedium,adiversion,globe,adjust,throttle,check,ortheoverflowpressurerelief,andotherfunctions・Usedforfluidcontrolvalve,fromthemostsimplecut-offvalvetoextremelyco
2、mplexautomaticcontrolsystemusedinallkindsofvalves,itsbreedandspecificationisvarious,nominalsizeofthevalvefromthetinyinstrumentvalvetosizeupto10mindustrialpipewithavalve・Thevalvecanbeusedtocontrolwater,steam,oil,gas,mud,allkindsofcorrosivemedium,liquidmetalandradioactivefluidandsoonvarioustypesoffl
3、uidflow,workingpressurevalvesareavailablefromultra-highpressure1.3mpax10to1000mpa,workingtemperaturefrom269°Cultra-lowtemperatureto1430°Chightemperature・Valvecontrolcanuseavarietyoftransmissionway,suchasmanual,electric,hydraulic,pneumatic,wormgear,electromagneticactuator,e1ectromagnetic,hydraulic,
4、electric,hydraulic,pneumatic,hydraulic,spurgear,bevelgeardrive,etc・；Inpressure,temperatureorotherformundertheactionofsensorsignals,action,accordingtotherequirementofthereservationornotdependonthesensorsignalsforsimpleopenorshutdown,relyonthedriveorautomaticmechanismmakesopeningandclosingvalveforli
5、fting,sliding,placeorrotarymovement,soastochangethesizeoftheportinordertorealizethecontrolfunction.UseofIvalvesValveisakindofpipeaccessories,itisusedtochangethechannelcross-sectionandflowdirectionofmedium,adeviceofcontrollingthemovementsofthemedium,adiversion,globe,adjust,throttle,check,ortheoverf
6、lowpressurerelief,andotherfunctions・Specifically,valveshaveseveralUSES:Truncatedvalvetype:themediuminthepassageortruncationofeachsegmentoftheline・Fotexample,gatevalve,globevalve,ballvalve,plugvalve,diaphragmvalve,butterflyvalveetc.Regulatingvalveclass:regulatingtheflowandpressureoftheagentinthelin
7、e・Suchasthrottlevalve,regulatingvalve,reliefvalve,safetyvalve,etc・divertervalveclass:changingtheflowdirectionoftheagentintheline,fordistribution,separationormixingmedium・Forexample,thedistributionvalve,thethree-w
