BS EN 60534-2-5-2003 工业过程控制阀.流通能力.通过有段间恢复功能的多段控制阀的流体流量的校准公式

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【英文标准名称】:Industrial-processcontrolvalves-Flowcapacity-Sizingequationsforfluidflowthroughmultistagecontrolvalveswithinterstagerecovery
【原文标准名称】:工业过程控制阀.流通能力.通过有段间恢复功能的多段控制阀的流体流量的校准公式
【标准号】:BSEN60534-2-5-2003
【标准状态】:现行
【国别】:英国
【发布日期】:2003-11-07
【实施或试行日期】:2003-11-07
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:方向控制阀;过程自动化;过程测量和控制技术;数学计算;流动;过程控制;流量率;电气工程;流体技术;阀门;流量;控制阀;流量控制;定义;尺寸选定;自动控制系统
【英文主题词】:Automaticcontrolsystems;Controlvalves;Definition;Definitions;Dimensioning;Direction-controlvalves;Electricalengineering;Flowcapacity;Flowcontrol;Flowrates;Flows;Fluidtechnology;Mathematicalcalculations;Processautomation;Processcontrol;Processmeasuringandcontroltechnology;Valves
【摘要】:ThispartofIEC60534includesequationsforpredictingtheflowofcompressibleandincompressiblefluidsthroughmultistagecontrolvalves.TheequationsforincompressibleflowarebasedonstandardhydrodynamicequationsforNewtonianincompressiblefluids.Theyarenotintendedforusewhennon-Newtonianfluids,fluidmixtures,slurries,orliquid-solidconveyancesystemsareencountered.Atverylowratiosofpressuredifferentialtoabsoluteinletpressure(△p/p1),compressiblefluidsbehavesimilarlytoincompressiblefluids.Undersuchconditions,thesizingequationsforcompressibleflowcanbetracedtothestandardhydrodynamicequationsforNewtonianincompressiblefluids.However,increasingvaluesof△p/p1resultincompressibilityeffectswhichrequirethatthebasicequationsbemodifiedbyappropriatecorrectionfactors.Theequationsforcompressiblefluidsareforusewithgasorvapourandarenotintendedforusewithmultiphasestreamssuchasgas-liquid,vapour-liquidorgas-solidmixtures.Thisstandardisapplicableonlytothosedesignsofmultistagemultipathcontrolvalvesandmultistagesinglepathcontrolvalves.
【中国标准分类号】:N16
【国际标准分类号】:23_060_40;25_040_40
【页数】:32P.;A4
【正文语种】:英语