FRP butterfly valves are usually made of resin and glass fiber. The resin type can be selected from different types of resin. The surface of the flange is smooth and smooth, the outer surface is neat and tidy..

Cast iron butterfly valves, commonly referred to as gray iron butterfly valve, are made of an alloy containing iron and 2-4% carbon, and may contain trace amounts of other impurities like sulfur or phosphorus. ..

Marine Bronze Butterfly Valve Butterfly valve is a valve which can be used for isolating or regulating flow.There are many types of butterfly valve,e.g lug type butterfly valve,wafer butterfly valve,flanged butterfly valve, ..