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ZYC自力式(shi)壓差控制閥(fa)是(shi)一種(zhong)用(yong)(yong)(yong)于(yu)消(xiao)防(fang)用(yong)(yong)(yong)水(shui)(shui)(shui)與生(sheng)(sheng)活用(yong)(yong)(yong)水(shui)(shui)(shui)并聯的供水(shui)(shui)(shui)系統中(zhong)，用(yong)(yong)(yong)來調配供水(shui)(shui)(shui)方向(xiang)的閥(fa)門。當火(huo)災(zai)發(fa)生(sheng)(sheng)時，消(xiao)防(fang)急(ji)需大(da)量用(yong)(yong)(yong)水(shui)(shui)(shui)，立即切斷生(sheng)(sheng)活用(yong)(yong)(yong)水(shui)(shui)(shui)，確(que)保足(zu)夠(gou)的消(xiao)防(fang)用(yong)(yong)(yong)水(shui)(shui)(shui)；當消(xiao)防(fang)停止用(yong)(yong)(yong)水(shui)(shui)(shui)壓力減小時，閥(fa)門自動打開，呈常(chang)開狀(zhuang)態，恢復生(sheng)(sheng)活供水(shui)(shui)(shui)。該閥(fa)使(shi)系統無須另設專門的消(xiao)防(fang)單獨供水(shui)(shui)(shui)管網，大(da)大(da)地節約了建設成本和用(yong)(yong)(yong)水(shui)(shui)(shui)量。