Wafer Butterfly Valve, Flange Butterfly Valve, Lt Butterfly Valve manufacturer / supplier in China, offering Zgtvt 2 Piece Wcb Ductile Iron Body F4 PTFE Wafer Butterfly Valve, F4 Full PTFE Lined Two PCS Wcb Body Wafer Type Butterfly Valve, Ductile Iron Ggg40/50 Concentric Flange Butterfly Valve with Double Eccentric Butterfly Valve and so on.