The gate valve is a shutter of the opening and closing member. The direction of movement of the gate is perpendicular to the direction of the fluid. It can only be fully open and fully closed, and cannot be adjusted and throttled. Sealing is achieved by the contact between the valve seat and the gate. Usually, the sealing surface will be welded with metal materials to increase wear resistance, such as surfacing 1Cr13, STL6, stainless steel, and the like. The ram has a rigid ram and an elastic ram, which are divided into a rigid gate valve and a resilient gate valve according to the ram.
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