Compressor
Impeller recirculates air through a side channel, building pressure in stages. Oil-free, compact.
Typical range
0.5–20 HP, to ~10 PSIG / to ~0.4 bar vacuum
Best for
Vacuum lifting, aeration, small conveying, lab applications.
Operating principle
Impeller blades recirculate air through a side channel, adding energy each pass — pressure builds in stages along the channel. Oil-free, compact, low pressure.
Efficiency notes
Oil-free, continuous duty, compact. Efficient at low pressures (to ~10 PSIG). Quieter than lobe blowers.
Selection guidance
Vacuum holding, aeration, small conveying, lab. Low pressure, compact, oil-free.
Components
- Impeller with many blades
- Side-channel housing
- Inlet/outlet
- Motor (often integrated)
- Filter
Common issues
- Impeller-to-housing wear → ingested debris
- Reduced flow → filter restriction, worn channel
- Overheating → blocked cooling
Maintenance
- Keep inlet filter clean
- Verify no debris ingestion
- Bearing/motor per OEM
Field tips
- Compact and oil-free — ideal for vacuum lifting and aeration
- Keep the inlet filter clean — restriction cuts flow
- Runs continuously without oil in the air stream