0-DN200,HS41XA-2.0-DN250,HS41XA-2.0-DN300,HS41XA-2.0-DN350,HS41XA-2.0-DN400,HS41XA-2.5-DN50,HS41XA-2.5-DN65,HS41XA-2.5-DN80,
HS41XA-2.5-DN100,HS41XA-2.5-DN125,HS41XA-2.5-DN150,HS41XA-2.5-DN200,HS41XA-2.5-DN250,HS41XA-2.5-DN300,HS41XA-2.5-DN350,HS41XA-2.5-DN400,
一、概述：
HS41XA带过滤防污隔断阀由两个隔开的止回阀和一个液压传动到泄水阀组成，第一个止回阀阀体内装有过滤网。由于止回阀的局部水头损失，中间腔内的压力始终低于入水口的压力。这个压差驱使泄水阀处于关闭状态，管路正常供水。在压力异常时，（即