CompAir L Series Rotary Screw
10–400 hp oil-flooded rotary screw platform. DELCOS Pro/XL controller.
Type
Oil-flooded rotary screw
Power
10–400 hp
Flow
35–1,900 cfm
Pressure
100–190 psig
Cooling
air-or-water
Drive
belt-or-direct
Lubrication
oil-flooded
Models
L07–L290 (kW)
Years produced
L-Series in production since 1990s; multiple refreshes.
Sound level
~66–76 dB(A) @ 1 m enclosed.
Ambient range
40–115 °F.
Motor efficiency
IE3 / NEMA Premium.
Warranty
5-year airend option.
Control modes
- Load/Unload
- Modulation
- VSD (Regulated)
Typical applications
- General industrial
- European-spec plant air
Specs & intervals below are from publicly published OEM literature and long-standing field practice. Torque values, exact revision-dated part numbers, and safety-critical settings vary by serial number — always cross-check the unit’s OEM manual and nameplate before ordering parts or performing service.
Fluid
Spec: CompAir A-Plus fluid (PAO)
Change interval: 8,000 hr
Wear parts
| Category | Interval | Source |
|---|---|---|
| Air filter | 2,000 hr | |
| Oil filter | 2,000 hr | |
| Separator element | 4,000 hr | |
| Motor bearings | Per motor plate |
Consumable part numbers change by revision and region — pull the current number from the OEM portal.
Parts cross-reference
OEM part numbers with commonly-cited aftermarket equivalents. Verify against the nameplate and OEM parts portal before ordering — dimensionally similar filters can still be wrong for the application.
Air filter
Air filter
OEM
100005325
Aftermarket
- P828889— Donaldson
- C 24 650/1— Mann-Filter
VerifiedConfirmed against a public OEM or aftermarket catalog / cross-reference tool at time of entry.LikelyCommonly cited in the vendor's cross tool or long-standing field usage; not independently re-verified against the current OEM parts list.UnverifiedDimensional lookalike or user-reported.
Oil / fluid filter
Oil filter
OEM
11427475
Aftermarket
- P550425— Donaldson
- LF3325— Fleetguard
VerifiedConfirmed against a public OEM or aftermarket catalog / cross-reference tool at time of entry.LikelyCommonly cited in the vendor's cross tool or long-standing field usage; not independently re-verified against the current OEM parts list.UnverifiedDimensional lookalike or user-reported.
Air-oil separator
Separator
OEM
98262/78
Aftermarket
- P532473— Donaldson
- OS 5223— Hifi
VerifiedConfirmed against a public OEM or aftermarket catalog / cross-reference tool at time of entry.LikelyCommonly cited in the vendor's cross tool or long-standing field usage; not independently re-verified against the current OEM parts list.UnverifiedDimensional lookalike or user-reported.
Lubricant
CompAir CS-1000 (PAO)
OEM
A11517-137
Aftermarket
- Rarus SHC 1025— Mobil
VerifiedConfirmed against a public OEM or aftermarket catalog / cross-reference tool at time of entry.LikelyCommonly cited in the vendor's cross tool or long-standing field usage; not independently re-verified against the current OEM parts list.UnverifiedDimensional lookalike or user-reported.
- Rarus SHC 1025— MobilUnverified
Need to look up a number across all models? Use the parts cross-reference search.
Preventive maintenance
Daily
- Check fluid level in sight glass at running temp
- Listen for unusual noise / vibration
- Check discharge pressure & temperature vs baseline
- Verify condensate drain function
- Log package amps if metered
Weekly
- Blow down receiver and drain traps
- Check for oil carryover at first drop leg
- Inspect for fluid or air leaks around airend and separator tank
- Verify safety valve is not weeping
Every 2,000 hr / 6 mo
- Change fluid filter
- Change air filter (or sooner per ΔP)
- Sample fluid for TAN / metals / water
- Clean cooler exterior with low-pressure air (never > 30 psi against fins)
Every 4,000 hr / 12 mo
- Change separator element
- Change fluid
- Inspect scavenge line & orifice for coking
- Check coupling / belt alignment & wear
- Torque electrical lugs to spec (typ. 45–75 in-lb #4–2/0 AWG)
Every 8,000 hr
- Rebuild inlet valve
- Rebuild minimum-pressure check valve
- Regrease or replace motor bearings per OEM interval
- Verify safety valve setpoint against gauge
Common faults & first checks
- AL01 airend temp high
- AL04 sep ΔP
- AL11 phase failure
Controller(s)
- CompAir DELCOS Pro / XL / 3100 — DELCOS XL: 5.7" TFT color; DELCOS Pro: 4-line monochrome.
Strengths
- Wide flow range
- DELCOS is stable & well-documented
Weaknesses
- Overlap with sister brand Gardner Denver
Field notes
CompAir is a Gardner Denver / Ingersoll Rand brand.