... we are most professional on gate valve and knife valve castings.Name: cast iron knife gate valve body 1) Material: gray iron, ductile iron 2) Size: 2"---60"(DN50 ... ) Pressure: low pressure, medium pressure, high pressure6) Manufacture standards: API/ANSI, BS4504, JIS, MSS, ISO, EN, DIN, NF 7) Machining: lathe ...