A friend can tell me how to improve the pressure in the bus pressure.

The structure and principle of pressure regulator are similar. Generally, there are adjusting screws or adjusting screw rings to adjust the air pressure. If you use it at home, you usually use a medium and low voltage direct-acting voltage regulator. The adjusting screw or adjusting ring of the pressure regulator is located at the top of the actuator (that is, the diaphragm). If you want to increase the air pressure, just turn the adjusting screw or ring clockwise, but when adjusting, you must have a pressure gauge at the air outlet, and observe the reading change of the pressure gauge. When adjusting slowly, it is recommended to rotate only 1/4 turns at a time, because there will be a process of pressure increase when the voltage regulator is boosted, not immediately after adjustment, so it is necessary to adjust slowly while observing, so as to avoid overpressure caused by excessive action. The import of 0.3, if the unit is bar, is really small. Your pre-pressure should come from the medium pressure pipe network. Generally, the normal medium pressure pipe network is around 2bar. Finally, I suggest that you don't adjust yourself, and don't contact the people in the gas company to reflect the situation. Because the operation of the pressure regulator has been adjusted according to the design pressure to ensure the outlet air pressure during normal gas supply, if the outlet air pressure is not enough because the inlet air pressure is too low and the set value is changed by private operation, people in the gas company will not be aware of it. Once the air intake returns to normal, the outlet air pressure of the pressure regulator with increased set value will also rise, which may cause the danger of overpressure! ! ! ! ! ! ! ! ! ! ! ! !

Sincerely answer for you, hope to give praise. O(∩_∩)O Thank you