Structural Features And Applications Of Commonly Used Valve 5

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Check valve

Check valves, also known as single-flow valves or one-way valves, belong to the category of non-return valve components. They are used to restrict the unidirectional flow of air and prevent backflow. There are two types: lift type and swing type. The check valves of our company are swing check valves. Its structural features and working principle are as follows:

Structural features: It is composed of a valve body, valve cover, valve disc, sealing ring, rocker, etc.

2. Working principle: Fluid is introduced into the valve from the lower end. When the thrust generated by the pressure difference between the fluid before and after the valve is greater than the weight of the valve disc, the fluid pushes the valve disc open, causing the valve disc to rotate along the rocker, allowing the fluid to pass through. When the fluid flows back, the pressure at the outlet end is greater than that at the inlet end. Under the action of gravity and pressure difference, the valve disc moves in the opposite direction along the rocker, preventing the fluid from flowing back.

3. Precautions

When installing this valve, it is essential to pay attention to the inlet and outlet directions to ensure that the flow direction of the valve disc is consistent with that of the fluid.

4. Common Faults and Their Handling

(1) Repair and installation of valve disc detachment; (2) Check and replace the sealing ring if the seal is not tight