... ) main material NBR Rubber with Brass alloys Gas Magnetic Valve for Natural Gas, Coal Gas, Liquefied Petroleum GasSpecifications: 1) Fluid ... : Natural Gas, Coal Gas, Liquefied Petroleum Gas 2) Size: 15 to ... : Brass 7) Response Time: Below 1 S Gas Magnetic Valve for Natural Gas, Coal Gas, Liquefied Petroleum Gas