Knife gate valve is suitable for mud and medium pipeline containing fiber, and its valve plate can cut off the fiber material in medium; it is widely used in conveying coal slurry, mineral pulp and papermaking slag slurry pipeline. Knife gate valve is the derivative of gate valve, and has its unique advantages and disadvantages.1, It is the preferred valve product for slurry, slurry and pulp pipeline. 2. Simple structure, small volume, light weight and convenient installation. Disadvantages of knife gate valve: it can only be used in low-pressure pipeline. Knife gate valve is mainly used in slurry pipeline, which can be said to be a special valve for slurry pipeline.