Experts, I have questions regarding the manual valve on the furnace burner and the fuel gas pressure control valve, and I would like to seek your advice.
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I’ve just started working and am still in the learning phase. Regarding heating furnaces that use fuel gas, I’d like to know how to operate the manual valve in front of the burner and the pressure control valve on the fuel gas pipeline when lighting the burner. What impact does the opening degree of these valves have on the pressure of the fuel gas? (The pressure gauge for the fuel gas pipeline is located after the pressure control valve but before the manual valve.) With the pressure in the fuel gas pipeline, as well as the temperature and composition of the fuel gas remaining unchanged, and the opening degree of the pressure control valve staying constant, what happens to the pressure inside the fuel gas pipeline if the manual valve on the burner is opened wider? When lighting the burner, how should the control valve and manual valve be operated to maintain the fuel gas pressure within an appropriate range?
Both the fuel gas main burner pipeline and the pilot light pipeline are equipped with check valves. Once these check valves are properly adjusted, when the pressure in the downstream pipelines changes, they will move back and forth to maintain the pressure in the main pipeline behind them
In the furnaces we use here, the main burner is equipped with a pressure control valve. What I don’t understand is that when I first start the burner, the pressure in the fuel pipeline should be regulated by this control valve. But when I increase the opening of the burner’s manual valve, there should be some delay in the adjustment made by the pressure control valve. If I change the pressure control valve to a manual one, keeping its setting unchanged, and then increase the opening of the manual valve, will the pressure in the fuel pipeline decrease?
Change the pressure control valve to manual mode; increase the valve opening of the burner. Won’t the pressure in the pipeline downstream of the control valve drop at night? By the way, increase the setting of the pressure control valve slightly, so as to maintain stable pressure in the fuel pipeline network downstream of it