Valve size:20-200mm Valve pressure:1.6,6.4MPA Medium:W.O.G Material:cast iron,carbon steel,stainless steel,C.I Valve size:20-200mmValve pressure:1.6,4.0,6.4MPAMedium:W.O.GMaterial:cast iron,carbon steel,stainless steel,C.I Pneumatic film stainless steel single-seat control valve