Answers To Some Frequently Asked Questions About Check Valves

What is the function of check valve?
What is the purpose of the check valve? The check valve is a kind of automatic valve, its main function is to prevent the reverse flow of the medium, the reverse rotation of the pump and the drive motor, and the discharge of the container medium.

What are some commonly used check valves?
Lifting check valves are straight-through, straight-through, vertical, and bottom valves;
Swing check valves are: single-valve, double-disc, or multi-disc;
Butterfly check valves include: single-plate butterfly type, double-plate butterfly type;
Diaphragm check valves include conical diaphragm type and annular braided diaphragm type.

What are the types of check valves?
Check valves include a lift check valve, swing check valve, butterfly check valve, forged steel check valve, silent check valve, cast iron check valve, brass check valve, stainless steel check valve, Carbon steel check valve, silent check valve, rubber disc check valve, double disc check valve.
A check valve, also known as a one-way valve or check valve, is used to prevent the medium in the pipeline from flowing backward. The bottom valve of the water pump suction valve also belongs to the check valve category.

Check valve use:
1. The check valve can prevent the medium from flowing backward:
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 flow medium flows in from the inlet port and flows out from the outlet port. When the inlet pressure is greater than the sum of disc weight and its flow resistance, the valve is opened. Conversely, the valve is closed when the medium flows backward.

2. The check valve can prevent the reverse rotation of the pump and the drive motor:
The check valve works automatically. Under the action of fluid pressure flowing in one direction, the valve disc opens; when the fluid flows in the opposite direction, the valve seat is acted on by the fluid pressure and the self-overlapping valve disc of the valve disc, thereby cutting off the flow.

The installation of the check valve should pay attention to the following things:
1. Do not make the check valve bear the weight in the pipeline. The large check valve should be independently supported so that it is not affected by the pressure generated by the pipeline system.
2. When installing, pay attention to that the direction of medium flow should be consistent with the direction of the arrow on the valve body.
3. The lifting vertical disc check valve should be installed on the vertical pipeline.
4. The lift-type horizontal disc check valve should be installed on the horizontal pipeline.

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