Gate valve opening and closing parts is the gate, the direction of movement of the gate and the fluid direction perpendicular to the gate valve can only be fully open and fully closed, can not be adjusted and throttling. The gate has two sealing surfaces, the two most commonly used mode gate valve sealing surface of the wedge, wedge angle with the valve parameters vary, usually 5 .
Wedge gate valve can be made into a whole, called the rigid gate; can also be made to produce a trace of the deformation of the gate to improve its craft, to make up the sealing surface angle in the processing of the deviation, Plate is called elastic gate. When the gate valve is closed, the sealing surface can only be sealed by the medium pressure, that is, by means of the medium pressure to press the sealing surface of the gate to the other side of the valve seat to ensure that the sealing surface of the seal, which is self-sealing. Most of the gate valve is forced to seal, that is, when the valve is closed, to rely on external force forced to the gate pressure to the valve seat to ensure that the sealing surface of the seal.
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