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Structure Of Check Valve

Aug 15, 2017

      The headstock is turned on or off by the force of the medium flow to prevent the backflow of the valve from being called check valve. Check valve belongs to the automatic valve class, mainly used in the medium one-way flow of the pipeline, only to allow the medium flow in a direction to prevent accidents. Check valve According to the structure, can be divided into lift check valve, swing check valve and butterfly check valve three kinds: 1. The lift check valve is divided into vertical and horizontal two kinds. 2. Swing check valve is divided into single, double and multiple three kinds. 3. Butterfly Check valve is straight-through. The above several check valve in the connection form may divide into the threaded connection, the flange connection, the welding connection and the clamp connection four kinds.Check Valve
      The structure of the lift check valve is similar to that of the cut-off valve, and its disc moves along the midline of the channel, which is reliable, but the fluid resistance is larger, and it is suitable for the small caliber occasions. Lift type check valve can be divided into straight-through and vertical two kinds. Straight-through type lift check valve can only be installed in the horizontal pipe, and vertical lift check valve is generally installed in the vertical pipe.Check Valve
      The disc of the swing check valve rotates on the rotating shaft. Its fluid resistance is generally smaller than the lift type check valve, which is suitable for large caliber occasions. Swing Check Valve According to the number of disc can be divided into single disc swing type, double disc swing type and multiple-disc swing three kinds. Single-disc swing check valves are generally suitable for medium caliber occasions. Check Valve
      In order to reduce water hammer pressure, it is best to adopt a closed check valve which can reduce the pressure of water hammer when selecting single disc swing check valve in large diameter pipe. Double-flap Swing check valve is suitable for Judachon caliber pipe. The pair of double disc swing check valve has small structure and light weight, and it is a fast developing check valve. Check Valve
      Multi-disc Swing check valve is suitable for large diameter pipeline. Butterfly Check valves are structurally similar to butterfly valves. Its structure is simple, the flow resistance is small, the water hammer pressure is also small. Diaphragm type check valve has a variety of structural forms, all using diaphragm as the headstock, because of its good waterproof hammer performance, simple structure, low cost.Check Valve