Pressure Reducing ValveChina Argon Ar Nitrogen N2 Cylinder Gas Regulators with Pressure Gauges Harris Type Model 825-25 500psi 40bar 4000psi 300bar 315bar W22-14 W23-14 Cga580, Find details about China Regulator, Reducer from Argon Ar Nitrogen N2 Cylinder Gas Regulators with Pressure Gauges Harris Type Model 825-25 500psi 40bar 4000psi 300bar 315bar W22-14 W23-14 Cga580