... C.S,S.S, Cast Iron, ductile iron, Bronze etc Wafer Butterfly Valve Specification:1) Size: 2" - 128"2) Rating: ... ,cast iron, ductile iron4) Operation: hand wheel, worm gear, electric actuator, pneumatic operatorStandards:1) Design and Manufacture: GB ... can do the OEM. We can make Butterfly valves,wafer butterfly valve, API butterfly valve and Lug butterfly valve .The material for cast steel, stainless ...