... ,S.S, Cast Iron, ductile iron, Bronze etc Wafer Butterfly Valve Specification:1) Size: 2" - 128"2) Rating: 150lbs- ... ductile iron4) Operation: hand wheel, worm gear, electric actuator, pneumatic operatorStandards:1) Design and Manufacture: GB,DIN,API2) Test & ... We can make Butterfly valves,wafer butterfly valve, API butterfly valve and Lug butterfly valve .The material for cast steel, stainless ...