Knife gate valve is in single piece , wafer type , drilling to suit with any relevant flanges standards , which facilitates easy to installation and reduce the overall weight external leakage. Gate is perpendicular to the flow. Smooth finish of the gate and fluid pressure effect a perfect seal against metal seat. Knife gate valves were originally designed for use in the pulp and paper industry. The benefits of knife gates also include that they are easy to actuate and cheap to produce. Knife gate valves are designed with a sharp edge to solve the blocking flow puzzle. The sharp edges of valves effectively cut through the pulp. They are available in large sizes to better handle thick flows of heavy oils, light grease, slurry, paper pulp, varnish, and wastewater.