Gate valve (gate valve) opening and closing parts are gate, the movement direction of the gate is perpendicular to the direction of the fluid, gate valve can only be fully open and closed, can not be adjusted and throttling.The gate has two sealing faces. The most common type of gate valve has two sealing faces forming wedges. The wedge Angle varies with the valve parameter, usually 50, and 2°52' when medium temperature is not high.Wedge gate valve gate can be made into a whole body, called a rigid gate;It can also be made into a gate that can produce a small amount of deformation to improve its manufacturability and compensate for the deviation of the sealing face Angle in the process. This type of gate is called an elastic gate.Stainless steel gate valve material is divided into 304 stainless steel gate valve, 316 stainless steel gate valve, 321 stainless steel gate valve.The expression method is Z41H-16P.