The installation method of check valve is mainly determined according to the type of check valve, the specific requirements of the pipeline system, and the installation environment. The following are several common check valve installation methods:
First, horizontal installation
1. General requirements: Most check valves, such as swing check valves and pipe check valves, usually require horizontal installation. When installing, ensure that the valve disc is above the pipe so that the valve disc can be opened smoothly when the fluid is flowing forward, and the valve disc can be closed quickly when the flow is reversed.
2. Installation steps:
Before installation, check the appearance and internal parts of the check valve are intact and ensure that the disc can be opened and closed freely.
Clean the impurities and dirt inside and outside the pipe to ensure the sealing performance and service life of the check valve.
Place the check valve in the predetermined installation position and use tools such as a wrench to secure it. Apply appropriate amount of sealant on the sealing ring to ensure sealing performance.
Turn on the fluid source and check the working status of the check valve to ensure that the disc is properly opened and closed.
Second, vertical installation
1. Type of application: Some specially designed check valves, such as lift check valves, may require vertical installation. The disc of this type of check valve usually moves up and down the axis, so vertical installation ensures smooth movement of the disc.
2. Installation steps:
It is also necessary to check the appearance and internal parts of the check valve before installation.
After cleaning the pipe, place the check valve vertically in the pipe and secure it with the appropriate tool.
Ensure that fluid inlet and outlet directions are correct to avoid unnecessary pressure or damage to the disc.
Third, special installation methods
1. Clamp check valve: This check valve is usually installed between two flanges, suitable for occasions that require quick installation and disassembly. When installing, it should be noted that the passing direction of the clamp check valve is consistent with the flow direction of the fluid, and ensure that it is stable installed on the pipeline.
2. Welding installation: In some cases, such as high pressure or high temperature piping systems, it may be necessary to weld the check valve to the pipe. This installation requires strict welding process and quality control to ensure the tightness and safety of the check valve.
Fourth, installation precautions
1. Directivity: When installing the check valve, ensure that the opening direction of the valve disc is consistent with the normal flow direction of the fluid. If the installation direction is wrong, the check valve will not work properly.
2. Tightness: The sealing performance of the check valve should be ensured during installation. For check valves requiring sealant or gaskets, install them as recommended by the manufacturer.
3. Maintenance space: When installing the check valve, future maintenance and overhaul needs should be taken into account. Leave enough space for the return valve so that it can be easily removed and replaced if needed.
Fifth, check and test after installation
After installation, check valves should be fully inspected and tested to ensure that they can work properly. You can manually operate the disc of the check valve to check that it can be switched on and off flexibly. At the same time, open the fluid source, observe the working state of the check valve under the action of the fluid, and ensure that the valve disc can be correctly opened and closed.
In summary, the installation method of the check valve should be determined according to the specific situation, including the type of check valve, the requirements of the pipeline system, and the installation environment. During the installation process, the manufacturer’s recommendations and relevant installation specifications should be strictly followed to ensure the normal operation and long-term use of the check valve.
Post time: Oct-28-2024