... 1zero pressure solenoid valve 2.plastic valve body ,brass joint 3.ISO:9001:2000,CE,ROHS,CQC 1.zero pressure solenoid valve2.plastic valve body ,brass ... 9001:2000,CE,ROHS,CQCFLZ-5 is a zero pressure solenoid valve,the operational pressure of this model is 0-50 meters ... malfunction ratio of traditional zero-pressure solenoid valves and the flaws of high -pressure solenoid valves that cannot turn on or ...