Wedge gate valve can bear high pressure because its sealing surface is at an angle to the vertical centerline and has good sealing. Generally, the valve stem of wedge gate valve is subject to quenching and tempering and surface nitriding treatment, which has good corrosion resistance and scratch resistance; The gate and valve seat seal are made of cemented carbide surfacing, with wear resistance, high temperature resistance, corrosion resistance, good scratch resistance and long service life; The valve body has a complete variety of materials, and the packing and gasket are reasonably selected according to the actual working conditions or user requirements, which can be applicable to various pressure, temperature and medium working conditions; Generally, the bearing pressure can reach PN16. It is widely used in industrial fields such as electric power, petroleum, chemical industry, metallurgy, mining and sewage treatment, especially in the equipment of ash removal and coal washing plant of power station!