Answer: The reverse proportional valve is used in conjunction with the butterfly air intake control valve. When the system pressure increases due to the reduction in gas consumption, when the reverse proportional valve set pressure is reached, the reverse proportional valve is activated and the control air output is reduced. The thrust of the valve stem of the servo cylinder of the air compressor intake valve is reduced. Under the action of the spring force, the valve stem retracts. When the spring force is balanced with the gas thrust of the cylinder, the valve stem is in a half-open state, and the air intake of the air compressor is reduced to balance with the gas consumption of the system.
The adjustment of the reverse proportional valve is relatively simple, but it requires multiple adjustments to achieve the sensitive action of the servo cylinder. The purpose of adjusting the reverse proportional valve is to activate the reverse proportional valve when the air pressure reaches 0.02MPa from the upper and lower limits of the pressure switch action, so as to reduce or increase the intake volume and make the intake valve close or open accordingly, and adjust the air compressor capacity in advance to reduce the number of empty weight loads of the air compressor. Adjusting the inverse proportional valve clockwise will increase the air intake of the servo cylinder, and vice versa, it will reduce the air intake.
