Rotary Screw Air Compressors
Lubricated Rotary Screw Compressor 22 - 30 kW
CompAir L23 - L29, RS
The L-Series from CompAir
Well known in the industry for quality and reliability CompAir continuously develops the L-Series achieving cutting edge performance and efficiency. The L23-L29 range of lubricated screw compressors comprises of fixed speed and regulated speed (RS) models.
Engineering Excellence
Benefits to you:
High reliability and high quality compressed air
Superior energy efficiency
High flexibility
Small footprint
Low maintenance & servicing costs
Engineering excellence
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Integrated heat recovery
Water Separator
Compressed Air Filter
Condensate Drain Solution
Compressed Air Refrigerant Dryer
Heatless Desiccant Dryers
Heat Regenerative Desiccant Dryers
Nitrogen Generator
SmartAir Master Multi Compressor Controllers
📌 General Info on 22 – 30 kW Lubricated Rotary Screw Compressors
Industrial range: The 22–30 kW (≈30–40 HP) segment is ideal for medium industrial air demand applications — running pneumatic tools, production lines, paint booths, and continuous operations. These units deliver airflow roughly ~3.8 – 5.5 m³/min depending on pressure and model.
Oil lubrication (lubricated / oil-injected): Most compressors in this range use oil-injected screw elements, which help with cooling, sealing, and smoother continuous airflow, with typical discharge pressures from ~7 bar up to ~13 bar.
Drive types:
Fixed-Speed (FS): Simple and cost-effective — runs at rated speed.
Variable-Speed (VSD/RS): Adjusts motor speed to match air demand, improving energy efficiency especially when demand fluctuates.
Features to consider: integrated control panels, air dryers, filters, condensate drains, and noise-reduction enclosures.
🛠️ How to Choose the Right One
⚡ For steady, constant air demand: Choose a fixed-speed compressor — rugged and less costly.
💡 For varying demand: A VSD model like the one above saves energy and reduces utility costs.
🧰 For workshop use with storage: A package with a large receiver tank (e.g., 1000 L) smooths out pressure delivery and reduces cycling.
Rotary screw compressors use two meshing helical rotors to compress air. When lubricated (oil-injected), the oil:
Lubricates and cools the compression chamber
Reduces wear and friction
Results in stable, continuous operation and lower energy usage compared to piston compressors
Key features usually include:
✔ Continuous 24/7 industrial duty
✔ Lower noise (typically ~60–66 dB(A))
✔ Fixed-speed or variable-speed (VSD) options
✔ Air-cooled systems
✔ Easy automation & control systems
✔ Pressure ranges commonly 7–12 bar (some models up to ~13 bar)
Typical performance specs in this power range are:
Flow / capacity: ~2.7–5.3 m³/min depending on pressure setting
Pressure: typically 7–10 bar
Lubrication: oil-injected/separator system with <3 ppm carryover
Duty cycle: 100% continuous
🧠 Tips for Choosing the Right Compressor
🔹 Fixed speed is generally more affordable and simpler for steady workloads.
🔹 Variable speed (VSD) saves energy when air demand changes over time.
🔹 Check pressure rating (e.g., 7–12 bar) against your tool or process requirements.
🔹 Consider whether you need options like integrated dryer or tank for cleaner, dry air output.
