Commissioning of Gas Pressure Regulating Cabinet by Zhenxing Gas Pressure Regulator Company
Zhenxing Gas Pressure Regulator Company provides a detailed commissioning process for gas pressure regulating cabinets. Here are the key steps to follow:
1. **Set the Pressure**: Start by adjusting the pressure in a step-by-step manner, following the principle of "high to low." The sequence should be: cut off the pressure, release it, and then set the working pressure. This ensures a controlled and safe process.
2. **Check the Closing Pressure**: Once the pressure is set, verify the closing pressure to ensure the regulator functions correctly and meets the required specifications.
3. **Open the Outlet Valve**: Only after confirming that the pressure setting is correct should you open the outlet valve. Never open it prematurely, as this can lead to dangerous situations.
4. **Protect Precision Instruments**: Be cautious with sensitive equipment. Avoid sudden pressure changes that could damage the instruments.
5. **Bypass Control During Commissioning**: If continuous air supply is needed during commissioning, manually control the pressure via a bypass. Keep one hand on the pressure regulating valve and monitor the pressure gauge continuously to maintain the desired outlet pressure. After the regulator is stable, slowly open the outlet valve and close the bypass valve.
6. **Double Regulator Debugging (2+0 Type)**: For regulators that use a 2+0 configuration (one active, one standby), both lines must be tested. Open one line and close the other, while venting the pressure in the standby line to prevent stress on the diaphragm and spring, which could cause fatigue over time.
7. **Automatic Switching Setup**: If the system uses two channels for automatic switching, set the pressure parameters for both main and auxiliary circuits. Fully open the inlet and outlet valves of both lines. The regulator must have high performance, with voltage regulation accuracy ≤ 2.5% and shut-off accuracy ≤ 10%.
- Conduct an automatic switching test by simulating a fault on the main line. Increase the pressure until the main line valve closes, cutting off the gas supply. Check if the auxiliary line starts automatically according to the preset pressure.
- After passing the test, reset the main line shut-off valve and adjust the pressure back to its original setting. Ensure both the main and auxiliary regulators are properly set—main line supplies gas, and the auxiliary remains on standby. This setup is commonly used in critical public and industrial gas supply systems.
8. **Series Monitoring Regulators**: Most series monitoring systems use passive monitoring, where the monitoring regulator is fully open.
- First, check the pressure signals of both regulators or pilots. If the signal tubes are connected after the working regulator, they are correctly installed.
- Tighten the pressure springs of both regulators. The front regulator (monitor) should bring the rear pressure to the cut-off level and help debug the shut-off valve.
- Commission the relief valve.
- Adjust the front regulator’s spring so that the intermediate pressure reaches the outlet pressure plus 10%.
- Set the post-relief regulator’s spring to the desired outlet pressure. At this point, the intermediate pressure will rise to match the inlet pressure.
- Note: This process should be done under conditions of high flow at the outlet.
9. **Leak Testing**: After completing the pressure regulator adjustments, use a foaming agent to check all connections for looseness or gas leaks.
This comprehensive commissioning guide from Hebei Zhenxing Gas Pressure Regulator Co., Ltd. ensures safe and efficient operation of gas pressure regulating systems.
Source: Zhenxing Gas Pressure Regulator | http://
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