Gate valve adiots the integral coating of the valve plate to produce deformation compesation and achieve good sealing effect. It overcomes the phenomenon of poor seal,leakage and rust of genal gate valve ,and saves installation space more effectively. Can be widely used in tap water ,sewage,construction,petroleum,chemical industry,food ,medicine,textile,electric power,ship,gold ,energy system and other fluid pipeline as a regulating and intercepting device used.The soft seal gate valve adopts no cavity structure ,the inside and outside surface of the valve body valve cover is sprayed with epoxy resin, and the surface of the gate plate is coated with rubber ,so the possiblility of corrosion is fundamentally eliminated. The valve stem seal is replaced by an "O" sealing ring,which makes the sealing more reliable.