Wafer Butterfly Valve, Flange Butterfly Valve, Lt Butterfly Valve manufacturer / supplier in China, offering API 150lb DIN Pn16 Concentric Stainless Steel EPDM Double Flange Butterfly Valve, Pn16 150lb Pn25 Stainless Steel CF8 Double Flange Type Industrial Butterfly Valve, Pn16 DN150 6inch 6" Ductile Iron Disc Double Flange Type Butterfly Valve and so on.