... or off medium in pipelines and equipments, and the pressure of medium will controlled by manual turn.3. Working Temp: -10 ... Valve,Gas Valve,Valve,Gas Valves,Gas Valve,Valve,Brass Gas Valve, Brass steam Valve; Brass Boiler Valve;Brass gas Valve;Ball Valve,Gas Valve,Valve,Gas Valves,Gas Valve ...