Pulse Electromagnetic Brass Valve work with gas detector,gas detector alarm,the Gas Electromagnetic Valve will shut off the gas Pulse Electromagnetic Brass ValveTechnology ParameterTarget gas :methane,coal gas ,LPGConnection mode:pass valveSize:1/2",3/4",1" and 1.25"Material:brass alloys , aluminum die castingInterface material :steelsTemperature:-10-50Stress :50kpaWorking valtage:DC9V-18V ...