Rotary Screw Air Compressors
L Series 7 - 11 kW
Fixed & Regulated Speed
Well known in the industry for quality and reliability, CompAir continuously develops and expands the L-Series to achieve optimum performance and efficiency and maximum flexibility. The wide range of screw compressors from 7 to 11 kW includes fixed and regulated speed models, high efficiency models and is available as airstation including receiver and refrigerant dryer.
Engineering Excellence
Compressors are more than just a financial investment, they are a key component in ensuring that manufacturers, processors and operators receive consistent, high quality low cost air. The screw compression element is the heart of the compressor and therefore CompAir keeps the design and manufacture in-house, using the latest CNC rotor grinding machinery, coupled with online laser technology. The resulting reliability and performance ensure that operating costs will remain low throughout the compressor’s life.
Benefits
Compressor base mounted
Complete package including compressor, dryer and receiver
Small carbon foot print (by mounting the components on the receiver the footprint is reduced up to 55%)
In-house AirEnd
Highly efficient motors
Easy maintenance
Wide regulation range
Rotary screw air compressors in the 7–11 kW range (L Series / similar category) are typically used in workshops, small manufacturing units, and continuous-duty industrial applications where reliable, steady compressed air is needed.
Here’s a clear breakdown of what you’re looking at 👇
🔧 What “L Series 7–11 kW” Means
Power range: 7 kW to 11 kW (≈ 10–15 HP)
Typical airflow: ~40–110 m³/h depending on model
Pressure range: usually 7–13 bar
Designed for continuous operation (24/7) with low noise and high efficiency
These are often equivalent to models like Atlas Copco G7–G11 or GA series.
⚙️ Fixed Speed vs Regulated (Variable Speed)
1. Fixed Speed (FS)
Runs at constant motor speed
Best for steady air demand
Lower upfront cost
Slightly higher energy consumption if demand fluctuates
👉 Ideal for:
Workshops
CNC machines running continuously
Packaging lines with constant load
2. Regulated Speed (VSD / Variable Speed Drive)
Adjusts motor speed based on air demand
Can save up to ~60% energy in variable load conditions
Higher initial cost but lower operating cost
👉 Ideal for:
Plants with fluctuating usage
Multiple machines turning ON/OFF
Energy-conscious operations
🧠 Key Buying Tips
Choose VSD (regulated speed) if your air demand fluctuates → saves electricity long-term
Choose fixed speed if your load is constant → cheaper upfront
Look for:
Integrated dryer (FF models)
Noise level (<70 dB if indoors)
Service availability in your area
✅ Quick Recommendation
Small workshop: 7.5 kW fixed speed
Medium factory: 11 kW fixed speed
Energy-sensitive plant: 7–11 kW VSD compressor
