Screw Air Compressor Spare Parts Atlas Copco OEM 1622878600 Intake Valve

The air compressor intake valve, also known as the intake control combination valve, is a core control component in screw air compressors. It integrates multiple functions including intake control, loading/unloading control, capacity regulation control, unloading, and preventing oil spray during unloading or shutdown. Its operational principle can be summarized as “loads when energized, unloads when de-energized.”

Structure and Working Principle of the Intake Valve: The intake valve typically employs a rotary disc or reciprocating valve plate mechanism to control airflow switching. It primarily features two control modes: - On/Off Control: Closes the intake port when the air receiver pressure reaches the upper limit setpoint and reopens when pressure drops to the lower limit. - Capacity Control: Slightly closes the intake port when pressure reaches the capacity control value, maintaining stable pressure through proportional regulation. Designed as a normally closed valve to prevent excessive gas influx into the compressor head during startup, thereby avoiding excessive motor starting current. The valve also incorporates an intake bypass valve to prevent high vacuum formation within the compressor head during startup or no-load operation, ensuring effective lubricating oil atomization.

Common Faults and Maintenance Points: Common intake valve issues include failure to load, failure to unload, and oil leakage. Causes may involve solenoid valve malfunction, internal contamination blockage, seal wear, or degraded lubricant. Maintenance requires regular inspection of solenoid valve circuits, cleaning internal oil deposits, and using high-quality lubricants. When faults occur, prioritize checking solenoid valve operation, pipeline integrity, and control signal stability.

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