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
A rotary screw compressor compresses air using two rotating helical screws (rotors) that trap and compress air as they rotate.
⚙️ Working principle
Air enters the compressor inlet.
Two screw rotors rotate and trap the air.
The air volume decreases as it moves along the screws.
Pressure increases and compressed air exits the outlet.
✔ Designed for continuous operation
✔ More reliable and quieter than piston compressors.
2️⃣ Meaning of “L Series 7–11 kW”
L Series → Model range of industrial screw compressors.
7–11 kW → Motor power rating (about 10–15 HP).
Used for small-to-medium industrial air demand.
Typical specifications:
Parameter Typical Range
Motor Power 7.5 – 11 kW
Pressure 5 – 13 bar
Air Flow 0.41 – 1.87 m³/min
Noise ~63 – 70 dB
Operation Oil-lubricated rotary screw
3️⃣ Fixed Speed vs Regulated Speed
🔹 Fixed Speed
Motor runs at constant RPM.
Compressor switches load / unload to maintain pressure.
Best when air demand is constant.
✔ Lower initial cost
✔ Simple operation
🔹 Regulated Speed (Variable Speed / VSD)
Motor speed changes according to air demand.
Produces only the required air flow.
✔ Energy saving (up to ~30%)
✔ Less pressure fluctuation
✔ Best for variable air demand.
4️⃣ Main Features of L-Series Compressors
Typical features include:
High-efficiency electric motor
Compact design with small footprint
Low noise operation
Optional air receiver tank + dryer package
Easy maintenance and long service life.
5️⃣ Common Applications
These compressors are widely used in:
Manufacturing workshops
CNC machines
Automotive garages
Paint booths and sandblasting
Packaging industries
Food processing plants.
✅ In simple words:
The L Series 7–11 kW rotary screw air compressor is a 10–15 HP industrial compressor designed for continuous compressed-air supply, available in fixed-speed or energy-saving regulated-speed versions.
✔ If you want, I can also explain:
Price of 7–11 kW screw compressors in India
Difference between piston vs screw compressor
Air consumption calculation for selecting compressor.
