... 3 piece floating balll valve2 piece floating ball valve,reduce ball floating ball ,top entry floating ball valve,etc Note: as for the difference ... designed before are served as reference. knife gate valve type features:1, seal by structural ceramics, can prevent solid ... 600LBMain MaterialsCarbon Steel:WCB,WCC,WC1,WC2,Low Temperature Carbon SteelStainless Steel:CF3,CF3M,CF8,CF8M,CN7M,CF8C,317LSpecial ...