Check valve introduction
Check valve is to rely on the flow of the media itself and automatically open, close valve disc, used to prevent the media backflow valve, also known as reverse valve, one-way valve, reverse valve, and back pressure valve.
Check valve belongs to an automatic valve, its main function is to prevent the reverse flow of the medium, prevent the pump and drive motor reversal, and the leakage of the container medium.
Check valve classification
The opening and closing parts depend on the medium flow and force to open or close, in order to prevent the reverse flow of the valve called check valve.Check valves belong to the automatic valve class, mainly used in the one-way flow of medium pipeline, only allow the medium to flow in one direction to prevent accidents.
Check valves can be divided into lift check valves, swing check valves and butterfly check valves according to the structure:
1. Lift check valves are divided into vertical and horizontal.
2. Swing check valves are divided into single - disc type, double - disc type and multi - disc type.
3. Butterfly check valve is straight through.
The above check valves can be divided into threaded connection, flange connection, welding connection and clamp connection
Check valve construction
According to the structure division, can be divided into lift check valve, swing check valve and butterfly check valve three kinds.Lift check valves can be divided into vertical and straight - through two kinds.Swing check valves are divided into single - disc type, double - disc type and multi - disc type.Butterfly check valve for butterfly double, butterfly single, the above check valve in the form of connection can be divided into threaded connection, flange connection, welding and clamping connection four.