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Check valve

Check valve is a kind of valve whose opening and closing parts are circular discs and act on their own weight and medium pressure to block medium backflow. It belongs to automatic valves, also known as check valves, one-way valves, return valves or isolation valves.


American Standard swing check valve

Swing check valve, also known as one-way valve or check valve, its role is to prevent the backflow of media in the pipeline. The opening and closing parts are opened or closed by themselves by the flow and force of the medium to prevent the medium from flowing backward. The valve is called a check valve. Check valves belong to automatic valves, mainly used for one-way flow of media on the pipeline, only allowing the flow of media in one direction to prevent accidents. Valves of this type should be installed horizontally in pipes.

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GB lift check valve

Lifting check valve is a kind of valve that automatically opens and closes the valve disc depending on the flow of the medium itself. It is used to prevent the flow back of the medium. It is also called check valve, one-way valve, counter-flow valve and back pressure valve. Check valve is an automatic valve, its main role is to prevent medium backflow, prevent pump and drive motor reversal, as well as container media release. Check valves can also be used to supply lines in which the pressure may rise to an auxiliary system that exceeds 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).

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Vertical flange check valve

Vertical Check Valve: The valve is opened or closed due to overcoming spring resistance due to the pressure effect of the medium at the inlet end of the pipeline. When the inlet pressure is lower than the outlet, the spring pushes the spool to the seat and closes the valve, preventing the medium from flowing back, so it has a check effect. Vertical check valves are widely used in chemical industry, liquefied petroleum gas (LPG) and fluid industries. Check valves are divided into three types according to their structure: lift check valve, swing check valve and butterfly check valve.

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Swing welded check valve

Welded swing check valve is automatically opened and closed by the force generated by the flow of the medium itself in the pipeline, belonging to an automatic valve. Check valves are used in pipeline systems. Their main functions are to prevent medium backflow, reverse of pump and its driving motor, and leakage of medium in the container. Check valves can also be used to supply the auxiliary system in which the pressure may rise above the pressure of the main system.

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High temperature and high pressure rotary check valve for power station

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