Fast customs check what are the precautions for the classification and use

Fast closing check valve opening and closing by medium flow and power to open or close, to prevent the backflow medium valve check valve. Check valve belong to automatic valve class, mainly for the one-way flow of medium pipeline, only allowed to medium flows in one direction, in order to prevent accidents. Quick closing check valve according to its structure, can be divided into the lift check valve, swing check valve and butterfly valve 3 kinds: 1. Lift fast closed check valve can be divided into vertical and horizontal two kinds. 2. Swing quickly closed check valve can be divided into more than single type, double disc type and disc type 3 kinds. 3. Fast butterfly check valve for straight-through processing. The above several fast closing check valve in the connection form can be divided into the thread connection, flange connection, and connected to the clamp four welding connection. So when use should pay attention to what? 1, do not make the check valve in the pipe system to bear the weight, the check valves shall be independent support large, make it not influenced by the pressure of the pipeline system to produce. 2, when installation, pay attention to the medium flow direction should be consistent with the body the direction of the arrow. 3, vertical elevating disc check valve should be installed in vertical pipe runs. 4, elevating disc check valve should be installed in horizontal pipe runs.