... Iron:GG25(HT250,GGG45(QT450)Stainless Steel:CF3,CF3M,CF8,CF8M,CN7M,CF8C,317LSpecial Alloy CE aproved 150lb ceramic knife gate valve ... medium piping system for coal preparation plantPneumatic 150lb ceramic knife gate valve features:1, seal by structural ceramics, can prevent ... , ANSI , DIN, AS, ISO, JIS,SANS etc Material cast iron, ductile iron, cast steel, stainless steel ( 304/CF8, 316/CF8M, 304L/ ...