Opening and closing of the ram of the torque, ram wedge gate valves, Industrial Valves seal, and the use of life is to improve the gate valve performance must consider a few questions. In order to avoid the ram stuck when lifting, the size of the wedge Angle of two sealing surface, usually with the temperature increasing of medium, size increases. Wedge gate valve gate, according to its different structures can be divided into single ram, double disc and flexible disc 3 kinds. Single valve plate has simple structure, the advantages of reliable, but processing difficulties, the temperature changes ram is stuck. Chess I double ram by two pieces of ram split, two sealing surface Angle can be adjusted automatically, so the processing is convenient, not easy to be wedge gate when temperature changes. Defect is parts more, the structure is complex, ram for active connection, after long-term corrosion, easy to fall off.
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