The role of the check valve

A check valve is a valve that automatically opens and closes the valve clack depending on the flow of the medium itself to prevent the medium from flowing back. The main functions of the check valve are: to prevent the medium from flowing backward, to prevent the pump and the drive motor from reversing, and to discharge the container medium.

The check valve can prevent the medium from flowing back:
The check valve has only one flow direction, that is, it can only flow in the direction of the water inlet, preventing water from flowing in the opposite direction. The flowing medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the weight of the disc and its flow resistance, the valve is opened. On the contrary, the valve is closed when the medium flows back.

The check valve can prevent the pump and drive motor from reversing:
The check valve works automatically. Under the action of the fluid pressure flowing in one direction, the valve flap opens; when the fluid flows in the opposite direction, the fluid pressure and the self-coincidence of the valve flap act on the valve seat, thereby cutting off the flow.

The check valve can also be used to supply the auxiliary system whose pressure may rise above the system pressure. Check valves can be divided into swing check valves (rotating according to the center of gravity) and lift check valves (moving along the axis). They are all used in pipes where the medium flows in one direction and only allows the medium to flow in one direction to prevent accidents.

Company Profile

2005——Start to produce ceramic lined valve series.

2006——Start to produce rubber seat dome valve, knife gate valve and pinch valves.

2010——Joint venture start to produce Teflon plastic lined valve series.

2016——VerSpec US warehouse operated in Akensas.

2018——VerSpec Korea branch operated in Cheonnam.

2019——VerSpec India and VerSpec Mexico start operating.

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