Here is to introduce Screw Air Compressor Filters Maintenance Guidelines. Screw air compressors rely on three critical filters: the intake air filter, the oil filter, and the air/oil separator. Regular Air Compressor Filters Maintenance is essential to ensure clean compressed air, reduce downtime, and extend the life of your compressor. Proper care not only improves performance but also helps lower operating costs.
1. Maintenance of the Intake Air Filter
The intake air filter prevents dust, dirt, and other contaminants from entering the screw compression chamber. Only particles smaller than 15 microns should pass through the screw airend.
If the air filter is clogged or damaged, larger particles can enter the compressor system. This accelerates wear on the oil filter and air/oil separator, and contaminates the bearing chamber. As a result, bearing wear increases, rotor efficiency drops, and in severe cases, rotor seizure can occur.
👉 Our company supplies air filters made with highquality filter paper, offering a service life of approximately 2000 hours under standard conditions.
2. Maintenance of the Air/Oil Separator
The air/oil separator plays a key role in separating lubricating oil from compressed air. Its efficiency depends on both the quality of the lubricating oil and the condition of the air filtration system.
In harsh operating environments, maintenance cycles for the air filter should be shortened, and prefilters should be considered. The air/oil separator must be replaced once the pressure differential exceeds 0.12 MPa. Failure to do so can cause motor overload or separator damage, leading to oil leakage.
Our separators are built with imported HV and Lydall fiberglass media, offering a reliable service life of 3500–5000 hours.
Replacement Procedure for the Air/Oil Separator Filter
1. Remove the control pipe joints on the air/oil barrel cover.
2. Disconnect the oil return pipe.
3. Unscrew fastening bolts and remove the barrel cover.
4. Take out the old separator and clean any debris.
5. Install the new separator, ensuring asbestos pads are aligned to prevent blowouts.
6. Reinstall the cover, oil return pipe, and control pipes, then test for leaks.
3. Maintenance of the Oil Filter
The oil filter should be replaced after the first 500 operating hours. Use a specialized wrench to remove the old filter, add new compressor oil, and handtighten the replacement into the filter seat.
For ongoing maintenance, replace the oil filter every 1500–2000 hours of operation, or during each oil change. In harsh environments, replacement intervals should be shortened.
⚠️ Never exceed the filter’s service life. A clogged oil filter can cause excessive pressure differential, triggering the bypass valve. This allows contaminants to flow directly into the compressor, risking serious internal damage.
Conclusion
Air Compressor Filters Maintenance on intake air filter, oil filter, and air/oil separator is vital for ensuring clean compressed air, reliable performance, and long equipment life. With highquality filters and a proper maintenance schedule, you can reduce operating costs and prevent costly breakdowns.
