Middle Line Wafer Butterfly Valve 2"~48" PN10/16(150lbs) CI,DI,SS, ... acids, salt, alkalis, etc.3) Materials: Part name Materialsbodycast iron, ductile iron, carbon steel, stainless steel, ALB, Brass, BronzeseatEPDM, PTFE, NBR ... , Viton, Buna, Hypalon, Neoprenedisccast iron, ductile iron, carbon steel, stainless steel, ALB, monelstemstainless steel, carbon steel Bushing ...