Cast Iron Wafer Type Flanged Knife Gate Valve 1.Size:2"-80" 2.Pressure:Class150 ... Seal:Rubber, PTFE, Stainless Steel Cast Iron Wafer Type Flanged Knife Gate Valve1. Size:2"-80"2. Pressure: Class150,Class3003. ... Iron.5. Seal: Rubber, PTFE, Stainless steel, Hard Alloy 6. Working temperature: Rubber <100° C, Hard-seal< 425° C 7. ... Slurry, Ashes, etc8.Dimensions: Cast Iron Wafer Type Flanged Knife Gate Valve