... ,S.S, Cast Iron, ductile iron, Bronze etc Wafer Butterfly Valve Specification:1) Size: 2" - 128"2) Rating: 150lbs- ... the OEM. We can make Butterfly valves,wafer butterfly valve, API butterfly valve and Lug butterfly valve .The material for cast steel, stainless ... steel and the standard for AISI,DIN,BS, ...