Electromagnetic Valve with Non-return Function DN:1-300mm Pressure:0.01-200MPa Material:stainless steel,brass,cast steel Electromagnetic Valve with Non-return FunctionDN:1-300mmPressure:0.01-200MPaMaterial:stainless steel,brass,cast steel Media:water,oil,air,corrosive fluidConnection:flange,welding,internal thread Electromagnetic Valve with Non-return Function