The genuine Hitachi oil separator filter is one of the important spare parts of oil-flooded Hitachi screw air compressors. Its function is to separate oil from the compressed air-oil mixture after compression, delivering compressed air with low oil content while returning the oil to the system to continue lubricating, sealing, and cooling the airend.
Functions of the Hitachi Oil Separator
During operation, oil is injected into the airend to provide lubrication, cooling, and sealing between the rotors. After compression, the air-oil mixture is fed to the oil separator tank.
The Hitachi oil separator filter captures the small oil droplets remaining in the compressed air stream, helping to:
- Reduce the amount of oil carried out of the system with the compressed air.
- Reduce excessive oil consumption in the compressor.
- Deliver cleaner discharge compressed air.
- Stabilize system pressure and operating performance.
- Protect downstream piping and compressed air equipment.
- Help maintain the service life of the Hitachi air compressor.
Advantages of Genuine Hitachi Oil Separator Filters
Using a genuine Hitachi oil separator filter ensures compatibility with each compressor model and operating conditions as designed by the manufacturer.
High precision: The filters size and structure are matched to the Hitachi air compressor system.
Good oil separation performance: The filter media is designed to capture small oil droplets in the compressed air stream, helping to limit oil carryover into the air line.
High durability and stability: Suitable for the continuous operating environment of industrial compressed air systems.
Reduced risk of failure: A properly specified oil separator helps prevent excessive pressure differential, abnormal oil consumption, and reduced compressor performance.
Signs the Oil Separator Needs Inspection or Replacement
During use, the system should be inspected if any of the following occur:
- Unusually high oil consumption in the compressor.
- Oil appearing in the discharge air line.
- Increasing pressure differential across the oil separator.
- Reduced pressure or air flow.
- Higher than normal power consumption.
- Alarms related to pressure or the oil separation system.
- The oil separator has reached its recommended service life.
The actual replacement interval should be based on the compressor model, operating hours, oil type, and environmental conditions. It should not be based solely on a fixed number of hours if the compressor operates in a dusty or high-temperature environment.