Common Problems And Solutions When Installing Check Valves

A check valve is a valve used to control the one-way flow of fluid and is commonly found in piping systems. However, there are some common problems that can be encountered when installing check valves that can affect the proper operation of the valve and the performance of the system.

Here are some common problems and corresponding solutions.

1. Leakage problem:

In some cases, leakage problems may occur after the check valve is installed, causing the fluid to not effectively stop when the reverse flow occurs. Leaks can originate from the valve itself, from sealing surfaces, or from improper installation.

Solution:

Check the valve itself for damage or defects, such as worn sealing surfaces, loose bolts, etc.

Ensure that the sealing surface and the seat ring fit well so that the sealing performance is not affected.

During the installation process, ensure that the fastening bolts are even and tightened in a timely manner to avoid uneven pressure.

2. Vibration and noise issues:

Check valves may produce vibration and noise after the fluid stops flowing, which may be caused by the inertia of the fluid or water hammer.

Solution:

Before the fluid stops flowing, the valve is gradually closed to reduce vibration caused by the inertia of the fluid.

Consider adding snubbers or shock absorbers to the system to reduce water hammer and vibration.

Choose a check valve with a vibration-dampening and sound-absorbing design.

3. Fluid blockage problem:

After the check valve has not been used for a long time, the internal parts may not move normally due to accumulated dirt, affecting the opening and closing of the valve.

Solution:

Regularly maintain and clean check valves to ensure smooth flow of internal components.

When not in use, open and close the valve regularly to maintain its normal movement.

Consider adding a filter to your system to reduce the buildup of dirt and impurities.

4. Valve stuck problem:

Check valves may become stuck due to material accumulation, foreign matter intrusion, etc., causing the valve to fail to fully close or open.

Solution:

Clean the inside of the valve regularly to prevent buildup and accumulation of impurities.

Consider adding a filter to the system to prevent impurities from entering the valve.

5. Pressure loss problem:

Improper valve size or flow path design may result in increased system pressure loss.

Solution:

Select the appropriate valve size and type based on system needs.

Optimize pipeline flow channel design to reduce unnecessary fluid resistance.

In short, the correct installation of check valves is a key step to ensure stable operation of the pipeline system. If you encounter the above problems, taking appropriate solutions in time can ensure the normal operation of the valve and ensure the performance and safety of the system. During the installation process, following the manufacturer's recommendations and ensuring professional involvement can effectively reduce the occurrence of problems.