Sep . 10, 2024 10:15 Back to list

Working Principle and Installation Suggestions of Lift Check Valve

Lift check valve is a type of valve that uses fluid pressure difference and the weight of the valve disc to achieve lifting and automatically prevent medium backflow.

The Working Principle of Lift Check Valve

The working principle of lift check valve is mainly based on fluid pressure difference and the weight of the valve disc itself to achieve one-way flow control of the medium. Specifically, when the medium flows into the lift check valve body in the direction indicated by the arrow on the valve body, the pressure of the medium acts on the valve disc to generate an upward thrust. As the thrust of the medium increases, when the thrust is greater than the gravity of the valve disc, the valve disc is lifted, the valve opens, and the medium can pass smoothly. On the contrary, when the medium stops flowing or flows in the opposite direction, the force of the pressure of the medium behind the valve acting on the valve disc plus the gravity of the valve disc itself will be greater than the force of the pressure of the medium in front of the valve acting on the valve disc. At this time, the valve disc rapidly descends and tightly closes on the valve seat, effectively preventing the backflow of the medium.

Installation Suggestions for Lift Check Valve

To ensure the normal operation and prolong the service life of the lift check valve, the following are some installation recommendations:

Check the model and specifications: Before installation, it is necessary to verify whether the model, specifications, and connection dimensions of the valve meet the design requirements to ensure compatibility with the pipeline system.

Cleaning the pipeline: Before installation, the pipeline should be thoroughly cleaned to remove impurities and dirt, in order to avoid damaging the lift check valve sealing surface or affecting valve performance.

Correct installation direction: The lift check valve has a clear indication of the flow direction of the medium. During installation, it is necessary to ensure that the arrow direction on the valve is consistent with the flow direction of the medium to avoid valve failure caused by reverse installation.

Vertical installation: It is recommended to install the lift check valve vertically on a horizontal pipeline to ensure smooth lifting of the valve disc. In special circumstances, if inclined installation is required, it should be ensured that the inclination angle does not exceed the specified range, and consideration should be given to adding support brackets to support the weight of the valve.

Flange connection: When installing the lift check valve with flange connection, attention should be paid to the parallelism and coaxiality of the flange surface to ensure that the bolts are evenly tightened and prevent leakage caused by improper installation.

Regular inspection and maintenance: After installation, the sealing performance and operating status of the valve should be checked regularly, and any problems should be promptly addressed. At the same time, regular cleaning, lubrication, and replacement of vulnerable parts should be carried out on the valve according to its usage to extend its service life.

In summary, following the above working principles and installation recommendations can ensure that the lift check valve plays a stable and reliable role in the fluid control system.

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