Opening and closing the gate of the moment, the wedge gate, the valve seal and valve life is to improve the performance of the valve must be considered several issues. In order to prevent the ram from being jammed during lifting, the angle between two sealing surfaces of the wedge ram usually increases with the increase of the medium temperature and the increase of the diameter of the ram. Wedge gate valve gate, according to their different structures can be divided into a single gate, double gate and flexible gate three. Single valve plate has the advantages of simple structure, reliable operation, etc., but the processing is difficult. When the temperature changes, the brake plate is easily stuck. I-type double gate made of two rams assembled together, the angle between the two sealing surfaces can be automatically adjusted, so easy to process, the temperature changes in the gate is not easy to be wedged. The disadvantage is that many parts, the structure is complex, the gate due to activity connections, long-term corrosion, easy to fall off.
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