Component
Filters that remove particulate from intake air to protect valves, rotors, rings, and downstream air quality.
Operating principle
An intake filter removes dust and particulate before air enters compression. Cleaner intake extends ring/rotor/scroll life and protects downstream separators and desiccant.
Components
- Paper/synthetic element
- Housing with restriction gauge
- Pre-filter (some)
- Rain cap / intake piping
Common issues
- Clogged filter → reduced capacity, higher energy, overheating
- Bypassed element → abrasives destroy rings/rotors
- Wet filter → restriction and corrosion
- Wrong element → poor fit, bypass
Maintenance
- Change on differential pressure, not just schedule
- Inspect housing/gasket for bypass
- Keep intake away from hot/dusty sources
- Log the restriction trend
Field tips
- A 50% clogged filter can cost ~3% extra energy
- Every 4°F cooler intake ≈ 1% energy saving — draw from a cool, clean spot
- Legacy oil-bath filters need oil service, not an element swap