... Iron:GG25(HT250,GGG45(QT450)Stainless Steel:CF3,CF3M,CF8,CF8M,CN7M,CF8C,317LSpecial Alloy CE aproved 150lb ceramic knife gate valve ... coal preparation plantPneumatic 150lb ceramic knife gate valve features:1, seal by structural ceramics ... standard:ASME B16.5, ASME B 16.47,MSS SP-81 DIN 2532,JIS ... DIN, AS, ISO, JIS,SANS etc Material cast iron, ductile iron, cast steel, stainless steel ( 304/CF8, 316/CF8M ...