How to check the normal working condition of the pressure limiting valve and maintain the pressure limiting valve?

When checking the normal working condition of the pressure limiting valve, pay attention to observe whether there is obvious damage or leakage on the outside of the valve. Check the valve body and joints for any cracks, corrosion or leakage, especially at the interface between the valve and the pipeline. If leakage is found, it must be dealt with in time to prevent further damage. Check the outer surface of the valve for debris, dust or corrosion, which may affect the working efficiency of the valve.
Performing a pressure test is an important step in checking the working condition of the pressure limiting valve. By installing a pressure gauge, check whether the actual working pressure in the system is within the set range of the pressure limiting valve. If the pressure exceeds the set limit and the pressure limiting valve fails to start or has no pressure relief effect, it means that the valve may be faulty. At this time, it is necessary to further check the working mechanism of the pressure limiting valve to confirm whether there are any internal or external fault factors, such as valve sticking, spring relaxation or poor sealing.
It is also very important to test the adjustment function of the pressure limiting valve regularly. Most pressure limiting valves allow users to adjust the working pressure according to actual needs. The valve can be tested by adjusting the adjustment screw or control device on the valve to respond to different pressures. If the valve does not work accurately within the expected pressure range after adjusting the pressure, the valve may need to be repaired or replaced.
Cleaning is an important part of maintaining the pressure limiting valve. After long-term use, the valve and the connecting pipes may accumulate dirt, sediment or impurities, which will affect the flexibility and accuracy of the pressure limiting valve. Clean the valve housing and sealing parts regularly, use suitable cleaning tools such as soft cloth or air blow, and avoid scratching with hard objects to avoid damaging the valve surface. During the cleaning process, always ensure that the valve is in the closed state to avoid damage during the cleaning process.
Lubrication of the pressure limiting valve is also a key step in maintenance. Some pressure limiting valves have moving parts inside, such as springs or valve seats, which require proper lubrication to ensure flexible operation. Use suitable lubricating oil or grease for regular application, especially in an environment where the valve is frequently opened or closed, to prevent parts from being worn out or stuck due to excessive friction. It should be noted that when selecting lubricating oil, ensure that it is compatible with the material of the pressure limiting valve, and avoid using inappropriate oils to cause damage to the valve.
In order to extend the service life of the pressure limiting valve, it is very necessary to regularly check and replace the worn parts. Springs, sealing rings and other parts may age, loosen or wear out after long-term operation, affecting the performance of the valve. During regular maintenance, check the condition of these wearing parts and replace them when necessary to ensure that the pressure limiting valve is always in optimal working condition.