Air Compressor Valves Unloading Valve Intake Valve Assembly

Features:

1,Application: Power Frequency Oil-injected Screw Compressor

2,It’s N/O type and will close in response to a control pressure signal.

3,Special structure design solves the problem of high start load.

4,At shutdown, intake valve has check function to prevent oil injection through the compressor.

5,Intake valve can eliminate cavitation noise from air-end by air admission when unloading.

6,Integration of discharge valve, air admission valve, solenoid valve and proportional valve into an intake valve makes it install easily and quickly.

Control system:

• Check valve model
• Switch model
• Adjusting model

The working process of air inlet valve of screw air compressor is: start, load, unload, air conditioner and insert.
(1) Start.
The motor starts, the host machine starts to operate, the inlet valve is closed, the small hole in the valve core enters the oil and gas barrel after compression, the system pressure rises gradually.
(2) Loading.
When the system pressure is lower than the lower limit pressure set by the pressure switch, the pressure switch action makes the loading solenoid valve power up, the three-way solenoid valve opens, and the air supply to the inlet valve servo cylinder drives the control cylinder to open the butterfly valve, and the inlet valve fully opens for inhalation.
Transfer the pressure of solenoid valve while closing the relief valve, the machine is no longer empty, the pressure in the tank continues to rise to the outside air supply.
(3) Unloading.
When the pressure rises to the maximum differential pressure switch, pressure differential switch sends an electrical signal to the three-way solenoid valve, solenoid valve closed stop gas supply to the inlet valve servo cylinder, unable to control cylinder pressure was maintained holes inlet butterfly valve closed, at this time the weight control check valve can promptly in tightly closed, open the drain valve at the same time release to basic hydraulic pressure in barrels of oil and gas.
The air compressor is in no-load operation. After loading the solenoid valve for 20min, the system enters the state of idle vehicle for too long.
(4) Volume tone.
Air compressor in the loading process to decrease the number of empty heavy load for air compressor, equipped with inverse proportion valve, when the unit pressure reaches maximum pressure switch inverse proportion valve in advance before action, reduce the gas to the servo cylinder, intake valve servo cylinder valve stem thrust reduction, under the action of spring force, the valve stem retraction, when the spring force and the gas cylinder thrust balance, the valve stem in a state of half open, the volume to reduce air compressor capacity adjustment.
(5) Decompression.
The stop signal comes from the empty vehicle for too long or the system pressure is continuously at the upper pressure limit, the motor stops, the main engine stops and no longer inhales, the internal check valve of the intake valve closes quickly without the phenomenon of oil exhaust, and the relief valve continuously vents to the external atmospheric pressure.