Our Butterfly Valves are made of a variety of materials such as: Cast Iron, Ductile Iron, Cast Steel, Forged Steel D71X-6/10/16 Wafer Soft Seat Butterfly ValveWe are specialized in researching and producing all kinds of water supply and drainage Butterfly Valves, Our Butterfly Valves are made of a variety of materials such as: Cast Iron, Ductile Iron, Cast Steel, Forged Steel, Stainless Steel and ...