The opening and closing part of the cast steel gate valve is the gate plate, the direction of motion of the gate plate is perpendicular to the direction of the fluid, the gate valve can only be fully opened and fully closed, and can not be adjusted and throttled. The two sealing faces of the most commonly used mode gate valves form wedges, and the wedge Angle varies with the valve parameters, usually 50, and 2°52' when the medium temperature is not high. The gate plate of the wedge valve can be made into a whole body, which is called the rigid gate plate; It can also be made to produce a micro deformation of the ram, in order to improve its processability, make up for the sealing surface Angle in the processing of the deviation, this ram is called elastic ram.

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