Common faults and treatment methods of gas pressure regulators
We need to monitor the daily operation of the gas pressure regulator in real time, including the inlet and outlet pressure of the pressure regulator , flow rate, temperature, etc. Comprehensive analysis of the collected data can be used to determine and timely determine the possible faults of the voltage regulator, identify the fault type and determine the severity. Finally, some targeted measures are taken to repair and debug it to restore it to normal operating status and ensure the stability of user pressure. Through experience, common faults and countermeasures are listed below.
1. The pressure regulator stops working
When the pressure regulator stops working, the possible reason is that the cut-off valve of the pressure regulator has been misoperated. It is cut off for other reasons, or some components in the regulator or pilot are damaged, such as membranes and diaphragms. It is also possible that the pressure difference between the inlet and outlet of the pipe network is too small at this time to make the pressure regulator work properly.
Solution: First, reset the cut-off valve of the pressure regulator and conduct a test. If it is not solved, then check whether the inlet and outlet pressure of the pipe network is within the normal range. If the problem is still not solved, you should check whether the components inside the pressure regulator or pilot are damaged, and replace them if they are damaged.
2. The outlet pressure of the pressure regulator is low
The possible cause of this failure is that the regulator The gas in the pressure regulator contains impurities, causing the valve port of the pilot to be blocked, or the actual flow rate of the pressure regulator is higher than the rated flow rate and the inlet pressure is too small. It may also be caused by aging of the components inside the regulator, such as a decrease in spring stiffness.
In the solution process, you should first check whether the inlet pressure of the pressure regulator is sufficient, then check and remove impurities in the pressure regulator and replace it with a new filter, and finally check the components inside the pressure regulator. , if necessary, replace the spring with a new one with strong stiffness. Of course, you can also adjust the valve stem to see if the problem can be solved.
3. The closing pressure of the pressure regulator is high
Possible reasons for this failure include the aging of the gasket in the pilot valve disc of the pressure regulator. Leakage occurs, or the O-ring at the connection between the valve disc, valve port and valve stem of the pressure regulator is damaged for some reason. The valve port of the pressure regulator is not working properly. It contains impurities or has been damaged. Finally, the gaskets at the upper and lower valve ports of the pressure regulator may be damaged.
When dealing with faults, the main thing is to check whether the gaskets and components involved are really problematic, and replace new gaskets and valve ports, including 0-rings, valve port gaskets, etc., if necessary.
4. Regulator surgeVibration
Surge phenomenon is mostly caused by friction Related, for example, the friction between the pilot bracket of the pressure regulator and other components is too serious or the friction between the valve stem and its guide hole is too large. Of course, it is also possible that the small holes in the pipe network during the pressure test are too large or the needle valve opening is large.
To solve this kind of problem, you need to use lubricant in the place with serious friction and reinstall it, and adjust the needle valve of the pressure regulator if necessary.
In addition to the common faults mentioned above and the corresponding maintenance and debugging methods provided, other forms of faults may also occur in gas pressure regulators. For this reason, the voltage regulator and pilot should be checked regularly during use. When closing the voltage regulator, check whether it is completely closed, etc. The specific operation method is to slowly close the outlet valve and measure the pressure at this time. If the outlet pressure is slightly higher than the pressure during normal operation and stabilizes in a short period of time, it means it is completely closed. If the pressure value continues to rise after closing, it means that the closure is not tight. At this time, the pressure regulator and pilot need to be inspected and repaired.
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