Lubricated Rotary Screw Compressor 55 - 75 kW
CompAir L55 - L75, RS
The 55 - 75 kW range of lubricated screw compressors comprises of fixed speed and regulated speed (RS) models
CompAir's 55 to 75 kW screw compressor range has been enhanced with 2 additional “e“ models offering improved performance in this kW size while at the same time being around 10% smaller than comparable machines.
You’re looking at the 55–75 kW lubricated rotary screw compressor range from CompAir, specifically the L55 to L75 (including RS variants). Here’s a clear, practical breakdown so you understand what this range offers and how to choose.
🔧 Overview of CompAir L55–L75 (RS)
These are industrial-grade oil-injected rotary screw compressors designed for continuous-duty applications like manufacturing, automotive, and heavy engineering.
Power range: 55 to 75 kW
Pressure range: 5 to 13 bar
Flow rate: ~2.1 to 14.8 m³/min
Variants:
Fixed speed (standard)
RS (Regulated Speed / Variable Speed Drive)
👉 RS models automatically adjust motor speed based on air demand, reducing energy consumption significantly.
🧠 Key Features & Benefits
1. Energy efficiency (biggest advantage)
Up to 6–8% efficiency improvement vs older models
RS models save even more under variable load
👉 This directly lowers electricity costs (the biggest operating expense).
2. Compact footprint
Around 2.23 m² installation space
~10% smaller than comparable machines
Good for plants with space constraints.
3. Improved airend design
New GD6 airend improves:
Flow by ~6%
Efficiency at high speed
4. Easy maintenance
Hinged doors + quick-access panels
Redesigned filters and separators
Fewer moving parts → lower downtime
5. Smart control system
Delcos XL controller:
Touchscreen interface
Real-time monitoring
Fault history & diagnostics
Optional remote monitoring (iConn)
6. Flexible configurations
Air-cooled or water-cooled
Fixed or variable speed
IE4 high-efficiency motor upgrade
Benefits
The upgraded 55 to 75kW screw compressors from CompAir have only a 2.23m2 footprint for easier installation in more restrictive locations.
The newly redesigned models offer quick release panel access for easier servicing, redesigned & improved service parts like separators & filters. With an efficiency improvement of up to 6.8%, and a higher flow rate up to 6% from the brand new airends, this improved performance and space saving ability delivers significantly lower lifetime costs.
Designed & manufactured at the centre of excellence in Germany, the latest changes represent a continuing improvement to a range which has been developed over many decades.
Outstanding Benefits
The new compressors are available in both fixed and regulated speeds – which can help reduce a system’s total cost of ownership significantly – as well as air-cooled and water-cooled options.
Pressure range: 5 to 13 bar
Volume flow: 2.1 to 14.8 m³/min
Motor power: 55 to 75 kW
The new models offer the following improvements:
Re designed GD6 semi integrated airend with better performance that can reach 5-6 % improvement at high speed
3-8% efficiency improvement for complete package standard models.
Smaller footprint by 11% compared to old models
Implementation of new automatic oil regulation valve for variable speed models provides better efficiency
New fine separator with 1 integrated seal , easy maintenance – no need to remove and re install o-rings
Sheet metal free of welding. All doors hinged to ease maintenance and reduce installation space. Easy access on the machines from all points
Premium efficiency airends
The new highly efficient airend delivers the highest quality compressed air at a low rotational speed, to help minimise the unit’s energy consumption and achieve excellent performance.
Our top quality airends are covered by the new 10 years warranty and up to 44, 000 hours.
Premium compressor design and industry leading warranty
The compressors are equipped with a premium high efficiency electric motor, which can be upgraded to an ultra efficient energy saving IE4 electric motor.
The RS (regulated speed) efficiently handles the varying air demand found in most plant air systems.The compressors incorporate quality components, such as high performance separator filter, large surface after cooler and thermostatically controlled motor driven fan.
The design concept is not only based on energy efficiency but also on high availability and low maintenance costs.
Therefore these packages ensure all service points are easily accessible. The reduced number of moving parts contributes to lower maintenance costs additionally.
Delcos XL innovative touch-screen compressor controller
The multilingual control system ensures safe and reliable operation and protects operators’ investment by continuously monitoring the operational parameters which is essential for reducing costs of ownership. The Delcos XL se is extremely user-friendly and self-explanatory.
