Gas pressure regulating cabinet commissioning Zhenxing gas pressure regulator company has a trick gas compression cabinet debugging step:
(1) Set the pressure, follow the principle of high to low, and follow the steps one by one, namely: cut off the pressure - release the pressure - work pressure.
(2) After the pressure is set, it is necessary to check the closing pressure to verify its performance and whether it meets the required value.
(3) The outlet valve can be opened after the pressure setting meets the requirements. The outlet valve must not be opened before this to prevent accidents.
(4) Precision instruments should be protected to prevent pressure fluctuations and damage the instrument.
(5) In the “modulation equipment commissioning, if uninterrupted air supply is required, the pressure should be manually controlled by bypass, and the pressure regulating valve should be controlled by one hand. With a hand pressure gauge, the pressure change is observed at all times to maintain the outlet pressure at the required pressure. Within the pressure range, after the pressure regulator pressure setting is completed, slowly open the regulator outlet valve, and then close the bypass valves after the regulator is normally supplied with air.
(6) If the regulator adopts 2+0 one open and one closed type, both roads need to be debugged, open one way, close one way (standby), and the air pressure between the inlet and outlet valves should be vented in the spare road to avoid the regulator film And the spring is stressed, causing fatigue.
(7) If the regulator port uses two channels to automatically switch the air supply, the pressure parameters should be set according to the main and auxiliary circuits, and then the two inlet and outlet valves should be fully open. The automatic switching has higher performance requirements for the regulator. Voltage regulation accuracy ≤ 2.5%. The closing accuracy is ≤10.
Automatic switching test: increase the main road pressure (simulation fault), make the main road pressure super high and cut off the valve action, cut off the main road natural gas, stop the gas supply, observe whether the auxiliary road can start the white line according to the set pressure. . After the inspection is passed, the main circuit shut-off valve is reset, and the pressure of the main circuit regulator is adjusted back to the original set value, so that the pressure of the main and auxiliary two-way regulator is set, the main road is mainly supplied with gas, and the auxiliary road is provided. Standby, when the main road fails, the auxiliary road regulator starts to realize continuous uninterrupted air supply. This method is commonly used in key public welfare and industrial and commercial household gas supply.
(8) Series monitoring regulators The series monitoring of regulators and regulators mostly adopts the form of passive monitoring, that is, the monitoring regulator is fully open.
1. First check whether the pressure signals of the two regulators (or pilots) are correct. If the pressure signal tubes are connected after the working regulator, they are connected correctly.
2. Press the pressure regulating springs of both regulators to the tightest, and the pressure regulating spring of the front regulator (monitor regulator) will make the rear pressure to the cutting pressure and debug the shut-off valve.
3. Commission the release valve.
4. Then adjust the pressure regulating spring of the front pressure regulator (monitor regulator) to make the intermediate pressure to the outlet pressure set value +10%.
5. The pressure regulating spring of the post-release regulator (working regulator). The post-stage pressure is set to the outlet pressure setting (the intermediate pressure will rise to equal the inlet pressure).
Note: This debugging should be carried out under the condition of large outlet flow.
(9) After the adjustment of the pressure regulator is completed, use foaming agent to check the looseness of each interface and the debugging process, and whether there is gas leakage.
(Source: Hebei Zhenxing Gas Pressure Regulator Co., Ltd.**, gas pressure regulator http://)
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