Hydraulic gear pump valve leaks are a common but troublesome occurrence in industrial facilities. While some valves are expected to leak to some extent, especially when they start to reach the pressure set on the nameplate, other valve leaks are problematic and can even be dangerous to your facility. If you suspect a leaking valve, here are a few reasons why your safety or pressure relief valve may be leaking, how to test the valve, and how to troubleshoot a valve that has been confirmed to be leaking. Four common reasons a pressure relief valve may leak include:
1. The reason for the leakage of the pressure relief valve
1. The relief valve is not fully closed
If the valve is not fully closed, the relief valve and safety relief valve will leak. This is a common problem in industrial environments where the environment is often dusty or dirty. If there is debris in the valve, it will prevent the valve from closing completely, causing the valve to leak.
2. The pressure relief valve is damaged
Pressure relief valves age and begin to age, especially in plants and facilities that experience extreme temperatures and a lot of wear. Over time, the valve can become damaged, affecting its ability to close properly. Leaks may occur if there is any damage or excessive wear on the seat or seal.
3. The size of the relief valve is incorrect
Another common cause of safety relief valve leakage is that the valve is not sized for the project. Whether it's a loose fit or a completely wrong fit, an improperly installed valve will not work properly and will often leak.
4. Leakage elimination method of the pressure relief valve
If you have tested and confirmed that your safety relief valve is leaking, there are several ways to troubleshoot and try to fix the leak.
The first step is to determine the cause of the leak.
Is the pressure relief valve the right size for the project?
Is the valve damaged?
Is there dust or debris blocking the valve?
Once the source of the leak has been identified, it is possible to assess whether the valve can be repaired or whether it should be completely replaced. For example, if the valve is the wrong size or the valve is damaged, it is best to replace it. If the valve can be cleaned and adjusted to work properly, repair is an option.
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