Cast Steel Wafer Type Knife Gate Valve 1.Size:3"-80" 2.Pressure:Class150/300 3 ... .Material:Carbon steel,stainless steel Cast Steel Wafer Type Knife ... Alloy5.Operator:Handwheel,worm gear,electric,pneumatic,hydraulic.6.Connection type:wafer type7.Medium:Pulp & Paper,Wastewater Treatment,Plants ... 34, API 600 and API 6D Cast Steel Wafer Type Knife Gate Valve