Atlas Copco GA Series (GA 7–110)
Atlas Copco's flagship oil-injected screw family, 10–150 hp, direct-drive. Available fixed-speed, VSD, or VSD+ (permanent magnet).
Type
Oil-flooded rotary screw
Power
10–150 hp (7.5–110 kW)
Flow
30–650 cfm
Pressure
100–188 psig (7.5–13 bar)
Cooling
air-or-water
Drive
direct
Lubrication
oil-flooded
Models
GA 7 / GA 11 / GA 15 / GA 22 / GA 30 / GA 37 / GA 45 / GA 55 / GA 75 / GA 90 / GA 110 (and VSD+ variants)
Years produced
GA platform in continuous production since 1980; current-gen VSD+ ~2013.
Sound level
~62–75 dB(A) @ 1 m — VSD+ typically 3 dB quieter than fixed-speed.
Dimensions
GA 7–15: ~40"×26"×48"; GA 30–45: ~63"×36"×62"; GA 90–110: ~93"×54"×79".
Weight
GA 7 ~830 lb up to GA 110 ~5,300 lb.
Ambient range
40–115 °F standard; tropical rating to 130 °F available.
Motor efficiency
IE3 / NEMA Premium standard; VSD+ uses permanent-magnet IE5-equivalent.
Starter
Wye-Delta on fixed-speed; VSD/VSD+ uses Neos inverter.
Integrated dryer
-FF variants include integrated dryer, filters, condensate management.
Warranty
5-year AIRPlan airend option; standard 2-year package.
Control modes
- Load/Unload
- Modulation
- DSS (Delayed Second Stop)
- Variable speed (VSD/VSD+)
Typical applications
- Manufacturing
- Automotive
- Pharmaceutical (with -FF & filtration)
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: Atlas Copco Roto-Xtend Duty Fluid (PAO) — 8,000 hr
Change interval: 8,000 hr / 2 yr
Approved alternatives
- Roto-Foodgrade Fluid (H1)
- Roto-Synthetic for extended intervals
Torque guidance
Per Atlas Copco service book; separator canister torque critical to O-ring life.
Always verify torque values against the OEM service manual for the specific serial number.
Wear parts
| Category | Interval | Source |
|---|---|---|
| Air filter element | 4,000 hr or ΔP | |
| Oil filter | 4,000 hr | |
| Oil separator | 4,000 hr | |
| Roto-Xtend fluid | 8,000 hr | |
| Service kit A/B/C (per hours code on Elektronikon) | Per HMI prompt | |
| Coupling element | Inspect at each service | |
| VSD+ inverter cabinet filter | Quarterly clean | |
| Motor bearings (fixed-speed) | 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
Intake filter element
OEM
1613872000, 1613800400
Aftermarket
- P828889— Donaldson
- C 24 650/1— Mann-Filter
- SA 16060— Hifi
- PA2775— Baldwin
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 (spin-on)
OEM
1613610500, 2903101500
Aftermarket
- P550777— Donaldson
- B7050— Baldwin
- SO 6247— Hifi
- LF3874— 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
Oil separator element
OEM
1622314000, 2901196600
Aftermarket
- P533930— Donaldson
- OS 5271— Hifi
- LB 962/2— 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.
Lubricant
Roto-Xtend Duty Fluid (diester)
OEM
2901052200 (20 L), 2901170300 (209 L)
Aftermarket
- 801— Chemlube
- DSL-46— Summit
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.
- 801— ChemlubeUnverifiedDiester equivalent for GA-series.
- DSL-46— SummitUnverified
Diester fluid — do not mix with PAO/PAG or mineral. Full drain/flush required on switch.
Controller memory battery
Elektronikon Mk5 battery
OEM
1900520105
Aftermarket
- CR2032— Panasonic
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.
- CR2032— PanasonicUnverifiedStandard 3 V lithium coin cell; back up parameters first.
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
- Element outlet temp shutdown — check Roto-Xtend level & cooler
- Elektronikon service prompts A/B/C/D — do full kit, not partial
- VSD+ (permanent magnet) inverter fault — verify cooling airflow to drive cabinet
- Fan motor overload after debris ingestion
Known issues & field notes
- VSD+ inverter fan bearing failure at ~40k hr — plan preventive replacement
- SMARTLINK gateway 3G sunset — swap for LTE gateway on legacy units
- -FF integrated dryer condenser fouling in machine shops — quarterly cleaning
Controller(s)
- Elektronikon Mk5 / Mk V (Graphic & Touch) — Graphic: 3.5" (small frames) or 4.3" (larger) TFT color, hard buttons. Touch: 7" capacitive TFT with icon menu.
Strengths
- Best-in-class efficiency on VSD+
- Elektronikon Mk5 well-supported
- SMARTLINK data logger add-on
- Very quiet enclosures
Weaknesses
- Roto-Xtend not cross-compatible with mineral or non-Atlas PAO
- Parts pricing premium vs generic
Field notes
GA line spans small shop units to full-plant compressors. VSD+ variants use a permanent-magnet motor + inverter for wide turndown.