旋启式止回阀用于防止管路系统发生反向流。它们适用于水平或竖直（仅限于向上流经阀门）安装的管路走向。旋启式止回阀具有低压降特性，**适合中等流速的介质应用。旋启式止回阀的正确选型很重要（请参见第20页技术规格表）。管线流速太低，或者流速过高，都会损伤阀门内件，缩短阀门的使用寿命。应避免管路系统出现快速和频繁的反向流、脉动或紊流的工况。将旋启式止回阀在管路系统中换一个位置安装，通常能减轻或排除以上工况所造成的问题。
Pacific?BoltedBonnetCastSteelSwingCheckValves
Swingcheckvalvesareusedtopreventflowreversalinpipingsystems.
Theyaresuitableforserviceinhorizontalorvertical(flowupthroughvalveonly)pipingruns.Swingcheckvalveshavelowpressuredropandarebestsuitedformoderatevelocityapplications.
Correctsizingofswingcheckvalvesisimportant(seepage20oftechnicaldatasheet).Eithertoolowalinevelocityortoohighavelocitycandamagevalveinternalsandshortenvalvelife.
Serviceinsystemsinvolvingrapidandfrequentflowreversals,pulsationorturbulentflowshouldbeavoided.Relocatingswingcheckvalveswithinthepipingsystemcanoftenminimizeoreliminateproblemscausedbythistypeofapplication.
联系我时，请说是在津市食品信息网看到的，谢谢！
