Type: CGA580 gas Cylinder Valve Working Pressure: 15 Mpa Medium: Inert gases DN(mm): 3 ... gas cylinder valve and metals fittings. The main products are oxygen valves, acetylene valve, argon valve, hydrogen valve, carbon dioxide valve, liquefaction propylene valve and liquefaction propane valve ... the Chinese National Standard GB, also the international standard CGA580 GAS CYLINDER VALVE