... : DN50 - DN300 2)Pressure: PN1.0/1.6MPa Knife Gate Valve Body:CI,DIWedge:SS304LStem:SS304U ring:EPDMEnd flange ... are widely used in water source projects, urban water supply and drainage, sewage treatment, electric power, petroleum, petrochemical , ... heat supply, shipbuilding, medicine and metallurgy industries. Equipment are used for regulating or cutting off ...