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业界资讯

泵出口止回阀门"止回阀"的选型

  一般的泵站工程情况,对于泵出口止回阀的选择,应遵循以下原则;

  1、对泵出口管路口径较小的管路,即DN ≤50mm时,应选用升降式止回阀。

  2、对泵出口管路口径DN>50mm的管路,应选用旋启式止回阀旋启式止回阀可以水平或垂直安装。旋启式止回阀阀瓣绕转轴作旋转运动,其流体阻力一般小于升降式止回阀,它适用于较大口径的场合,安装位置不受限制,通常安装于水平管路,它适用与较大口径的场合。根据阀瓣的数目可分为单瓣旋启式、双瓣旋启式及多瓣旋启式三种。单瓣旋启式止回阀一般使用与中等口径的场合。大口径管路选用单瓣旋启式止回阀时,为减小水锤压力,最好采用能减小水锤压力的缓闭止回阀。双瓣旋启式止回阀适用与大中口径管路。对夹双瓣旋启式止回阀结构小、重量轻,是一种较快的止回阀;多瓣旋启式止回阀适用与大口径管路。


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