Rotary Screw Air Compressors
Lubricated Rotary Screw Compressor 30 - 45 kW
CompAir Li30-45
The New Generation
Industries across the globe rely on CompAir rotary screw compressors for the supply of high quality compressed air. The CompAir Li series air compressor range incorporates the best of CompAir technology, design and quality. To deliver reliable, economical and efficient performance in a completely new package. The Li series delivers high quality air at volumes at a pressure range between 7 and 10 bar and is available in air cooled versions.
Maximum Durability
We maximise service life and durability by eliminating elastomer and thermoplastic pipe and tube in system pressure lines. Replacing them with corrosion resistant stainless steel tubing and passivated zinc coated carbon steel piping. For ease of maintenance we complete the connection with viton sealed grooved couplings and self sealing high pressure compression fittings.
Designed for Serviceability
Maintenance personnel love the Li series compressor range. Service access is quick and easy with all doors able to be removed in seconds. We’ve also made sure serviceable components including filters are easily accessible and no piping needs to be disconnected to service the separator.
📌 Featured Lubricated Rotary Screw Air Compressors (30–45 kW)
Industrial rotary screw compressors in the 30–45 kW class are widely used in factories and workshops for continuous, reliable compressed air supply. They are oil-injected for lubrication, cooling, and sealing, making them efficient for heavy-duty applications.
⭐ CompAir / Li-Series & Similar Models
CompAir L45 Rotary Screw Compressor – A 45 kW lubricated rotary screw compressor ideal for industrial compressed air needs with robust build quality and reliable performance.
CompAir L45e Lubricated Rotary Screw Compressor – Premium-efficiency variant with enhanced energy savings.
Screw air compressor 40HP Li‑series Screw Compressor with in – Approx ~30 kW / 40 HP class Li-series unit with variable frequency drive option (likely L30RS).
Other rotary screw compressors around this power range that may be suitable depending on requirements:
Rotary Screw Air Compressor ‑ 30 Hp…, Dmc 30 Hp Rotary Screw Air Compressor, and Gardner Denver (CompAir) Make 40HP Screw Compressor.
📘 Overview: CompAir Li30-45 & L-Series Compressors
Range & Design
The CompAir Li / L30–L45 range covers 30 kW, 37 kW and 45 kW models, in both fixed-speed and variable-speed (RS) configurations.
Available options often include integrated dryers and advanced controller systems.
Key Performance & Features
✔ Lubricated rotary screw technology – Oil-injected screw element provides smooth, continuous compression with lubrication and cooling.
✔ Pressure range – Typical working pressures from about 5 bar up to 13 bar depending on model and speed configuration.
✔ Energy efficiency – Higher-efficiency “E” variants and regulated-speed (RS) models deliver notable energy savings by matching output to demand.
✔ Durability & serviceability – Robust piping with corrosion-resistant materials, easy-access doors, and service-friendly layouts.
✔ Control and monitoring – Modern controllers (e.g., Delcos XL SE) allow real-time status, diagnostics, remote control and data logging.
Technical Notes (Typical for 30–45 kW)
Air delivery (FAD) ranges roughly from ~1.3 m³/min up to ~8.7 m³/min depending on model, speed and pressure.
Pressure settings often configurable between ~5 – 13 bar general industrial range.
Units typically have quiet, efficient motors (often IE4 class) and large coolers for stable operation.
📊 Typical Industrial Uses
These compressors are suited to:
Manufacturing and assembly plants
Automotive workshops
Pneumatic tools and plant air systems
Packaging, material handling, and instrumentation
Where continuous, reliable compressed air is required
Advantages
✅ High duty-cycle performance for continuous operation
✅ Lower operating noise compared with piston compressors
✅ Better energy efficiency (especially with variable speed units)
✅ Lower maintenance costs over long life
✅ Good discharge pressure and flow control
Considerations
🔹 Requires proper oil management and periodic oil/filter changes
🔹 Not suitable for oil-free requirements (e.g., food/medical air without dryers/filters)
🔹 Initial cost higher than some piston compressors
