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 (≈10–15 HP) range—like the “L Series (Fixed & Regulated Speed)” you mentioned—are typically used for small to medium industrial applications such as fabrication shops, CNC machines, packaging units, and automotive workshops. The key decision factors here are duty cycle (continuous use), energy efficiency (VSD vs fixed), airflow (CFM), and reliability.
🔧 Best Rotary Screw Air Compressors (7–11 kW range)
🥇 Best overall (balanced performance & reliability)
Fixed Speed
Runs at full capacity always
Lower upfront cost
Best when demand is constant
Regulated Speed (VSD)
Adjusts output based on air demand
Saves up to ~60% energy in variable load conditions
Higher initial cost but lower electricity bills
👉 If your load fluctuates (most factories do), VSD is worth it.
🧠 How to choose (quick guidance)
Small workshop (1–3 machines) → ELGi EN05 / EN Series
Medium factory (CNC, fabrication) → ELGi EN Series or Atlas Copco 7.5 kW
Heavy production / 24×7 → Atlas Copco (prefer VSD)
Power cost is high → Always go VSD
