The O-ring inside the pilot valve of a pilot-operated safety valve is prone to damage

It is quite common to encounter situations where the O-ring inside the pilot valve gets damaged easily. This problem can be solved in the following ways: 1. Check the material of the O-ring: Ensure that the O-ring material used meets the requirements of the working environment and possesses good wear resistance and corrosion resistance. 2. Adjust the pilot valve clearance: Properly adjusting the clearance of the pilot valve can reduce the amplitude of piston movement and minimize wear on the O-rings. 3. Improve lubrication: Adding a lubricant between the pilot valve and the piston can reduce friction and extend the service life of the O-ring. 4. Increase the surface hardness of the piston: By using surface treatment methods to increase the hardness of the piston, contact with the O-ring can be reduced, thereby preventing wear. At the same time, it is also necessary to regularly inspect and maintain the pilot valve, and replace damaged O-rings in a timely manner to prevent leaks and other safety hazards that they may cause. .

There are fluctuations in the pressure of the process system, and it’s not possible to stabilize this pressure. Once stabilizing measures are taken, the actual system pressure can no longer be accurately reflected, which raises concerns regarding potential safety hazards.

I think you can compare it with the figure below. See if it helps

Since the pressure fluctuations are within the design limits, it is possible to consider raising the setting pressure of the safety valve accordingly. Safety valves and pressure relief valves are somewhat different; safety valves cannot be used as pressure relief valves.