Atlas Copco Compressor Parts Compatibility Guide
Atlas Copco compressors are renowned for reliability and efficiency, but each model and generation uses specific filters, separators and oils. Choosing the correct parts preserves performance, reduces energy consumption and avoids costly downtime. This UK-focused guide explains how to identify your machine, interpret model codes and select genuine or equivalent replacement parts available from CompressorParts.co.uk.
1. Understanding Atlas Copco Model Codes
Atlas Copco model names reveal a great deal about the machine’s size and design. For example:
- GX Series (2.2 – 11 kW): Small belt-driven screws, ideal for workshops.
- GA Series (11 – 90 kW): Industrial rotary screws for continuous duty.
- GA VSD / VSD+ Series: Variable-speed versions offering energy savings up to 50 %.
A label such as GA7 VSD 10 bar tells you it’s a GA-series compressor rated 7 kW with variable-speed drive and a maximum pressure of 10 bar. Knowing this ensures you buy the right separator, oil filter and oil grade.
2. Key Service Parts and Typical References
- Intake Filter: Replacement every 2 000 hours; common part number 1621935600 or equivalent.
- Oil Filter: Spin-on type 1622062300 (early GX) / 1622062301 (later GA models).
- Air/Oil Separator: 1621938900 (standard GX) or 2906008800 (GA series).
- Drive Belts: Check tension and replace around 4 000 hours or annually.
- Oil: Atlas Copco Roto Xtend Duty ISO 46 or equivalent fully synthetic compressor oil.
3. Maintenance Intervals for UK Operating Conditions
| Component | Interval (Hours) | Notes |
|---|---|---|
| Intake Filter | 2 000 | Clean or replace more often in dusty environments. |
| Oil Filter | 2 000–4 000 | Change with oil for best results. |
| Air/Oil Separator | 4 000–8 000 | Replace at 0.8 bar ΔP maximum. |
| Drive Belts | 4 000 | Inspect for cracks and alignment. |
| Oil Change | 2 000–4 000 | Use OEM or approved synthetic oil only. |
4. Cross-Referencing OEM and Alternative Parts
We maintain a large cross-reference database mapping Atlas Copco OEM numbers to proven aftermarket equivalents. Each listing details the OEM part, compatible model and verified alternative. For instance, 1621935600 intake filter cross-references to Mann CF 940 and Fleetguard AF25553, both tested for identical filtration efficiency.
5. Common Service Kits
- GX 7 Kit: Intake Filter 1621935600, Oil Filter 1622062300, Separator 1621938900, 2 L ISO 46 oil.
- GA 11 Kit: Intake Filter 1613800700, Oil Filter 1622062301, Separator 2906008800, 4 L oil.
- GA VSD Kit: Contact us for exact build variant match – VSD models differ by controller and pressure option.
6. Troubleshooting and Symptoms
- High Oil Carry-Over: Separator saturated or oil grade incorrect – fit new separator and use synthetic ISO 46.
- Overheating: Dirty coolers or clogged oil filter; clean and replace filters.
- Low Pressure: Intake filter restricted or regulator fault – replace filter and check controls.
- Excessive Noise: Worn bearings or loose mounts; inspect anti-vibration pads (see mounts).
7. Energy Efficiency Tips
- Keep filters clean – each 0.1 bar of restriction adds ~1 % to energy use.
- Use VSD models or fit sequencers for multi-compressor installations.
- Fix air leaks – 10 small leaks can waste the output of an entire GX compressor.
8. Environmental and Condensate Compliance
All oil-lubricated Atlas Copco compressors produce condensate that must be treated before discharge. Install an oil-water separator and replace cartridges annually to meet UK regulations.
9. Ordering and Support
Provide your Model, Serial and Operating Pressure to our team and we’ll supply the correct kit or individual filters from UK stock with fast delivery.
10. Example Image and Label Guide
Serial numbers are typically found on the rear cabinet frame or inside the service door. Record the entire string including prefix letters.
FAQs
Can I mix OEM and aftermarket filters in the same service?
Yes, provided both meet OEM specifications and pressure ratings. We supply verified equivalents only.
How often should I change the oil in my GX compressor?
Every 2 000–3 000 hours or 12 months, whichever comes first. Use ISO 46 synthetic oil.
What’s the difference between GX and GA series?
GX units are belt-driven compact screws for workshops; GA models are industrial direct-drive screws for continuous use.