DeZURIK Cast stainless steel knife gate valve. Size: 12" Pneumatically operated ram with 12mm air fittings. Unit in excellent condition KGN-MSU metal seated unidirectional Cast Stainless Steel Knife Gate Valves are designed for applications in corrosive abrasive liquid slurry or dry material applications including: Pulp & Paper Mining Waste Water Chemical Petrochemical Power Steel etc. All KGN valves feature a cast corrosion resistant stainless steel body and packing gland. The gate and stem are also stainless steel; the superstructure is stainless steel.