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
Premium efficiency airend
Time proven inverter concept
iConn industry 4.0 Solution
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
🔧 Lubricated Rotary Screw Air Compressors
CompAir L23 – L29 (22–30 kW) – Detailed Summary
📌 1. Overview
Model Range: L23 to L29 (including RS – regulated speed models)
Power Range: 22 kW to 30 kW (≈ 30–40 HP)
Type: Oil-lubricated rotary screw compressor
Operation: Designed for continuous industrial duty (24/7)
👉 This series is part of the CompAir L-Series, known for high reliability, efficiency, and compact design
⚙️ 2. Working Principle
Uses two rotating screw elements (airend)
Air is compressed continuously inside the screw chamber
Oil is injected for:
Cooling
Lubrication
Sealing
👉 Result:
Continuous airflow
Low noise and vibration
High efficiency
📊 3. Technical Specifications
Parameter L23 (22 kW) L29 (30 kW)
Power 22 kW (30 HP) 30 kW (40 HP)
Pressure Range 5 – 13 bar 5 – 13 bar
Air Flow (FAD) ~3.0 – 4.16 m³/min ~4.1 – 5.52 m³/min
Speed Type Fixed / Variable (RS) Fixed / Variable (RS)
Noise Level ~67–68 dB ~69 dB
👉 Variable (RS) models provide wide flow control range depending on demand
🔁 4. Fixed vs RS (Regulated Speed)
🔹 Fixed Speed Models (L23 / L29)
Constant motor speed
Load/unload operation
Lower initial cost
👉 Best for:
✔ Stable, continuous demand
🔹 RS Models (L23RS / L29RS)
Variable Speed Drive (VSD / inverter)
Adjusts speed based on air demand
Reduces energy loss
👉 Energy saving:
✔ Significant reduction in power consumption
👉 Best for:
✔ Fluctuating load industries
🔋 5. Key Features
✅ High Energy Efficiency
Slow-speed airend reduces power consumption
✅ High Reliability
Integrated oil filter & fewer hoses improve durability
✅ Compact Design
Small footprint → saves space
✅ Low Maintenance
Easy access design
Optimized service components
✅ High Air Quality
Oil carryover < 3 ppm (very clean air output)
🧠 6. Advanced Features
🔹 Delcos Pro Controller
Real-time monitoring (pressure, temperature, runtime)
Service alerts & fault logs
Remote control & auto restart
Modbus communication
👉 Ensures safe, smart, and automated operation
♻️ 7. Optional Integrated Systems
Heat recovery system
Refrigerant dryer
Air filters
Condensate drain system
Nitrogen generator compatibility
👉 These improve overall system efficiency & air quality
🏭 8. Applications
Used in:
Manufacturing plants
Automobile industry
Textile factories
Food & beverage processing
Packaging industries
Heavy-duty workshops
✅ 11. Final Conclusion
L23 (22 kW) → Best for medium industrial applications
L29 (30 kW) → Suitable for heavy-duty operations
Fixed Speed → Lower cost, stable demand
RS (Variable Speed) → Best for energy savings & fluctuating load
👉 Simple Rule:
Constant demand → Fixed Speed
Variable demand → RS (VSD)
