Middle Line Wafer Butterfly Valve 2"~48" PN10/16(150lbs) CI,DI,SS,CS,ALB,Brass materials ISO, API, ASTM, ANSI, DIN, ... BS, JIS Middle Line Wafer Type Butterfly Valvesize:50- ... name Materialsbodycast iron, ductile iron, carbon steel, stainless steel, ALB, Brass, BronzeseatEPDM, PTFE, NBR, Viton, Buna, Hypalon, Neoprenedisccast iron, ductile ...