... ) Category and applications Applications Gas: air,carbon dioxide,oxygen gas,nitrogen, coal gas,natural gas,methane and other chemical gas.Liquid: water,high-temperature water ... of flow speedLiquid(water):0.25M/S~9.5M/S Gas:4M/S~78M/S Vapor:3M/S~78M/S Relative ... each link completion good, slowly open whether observation in the valve portal has leakage(need special note Human body safety) if ...