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.
The CompAir Li30–45 is part of a premium range of lubricated rotary screw air compressors designed for industrial use where continuous duty, efficiency, and reliability are critical. Here’s a clear breakdown to help you understand this model and comparable options.
🔍 Core Features
Power range: 30 kW to 45 kW
Pressure range: typically 7–10 bar
Type: Oil-lubricated rotary screw compressor
Cooling: Air-cooled versions available
Drive: Direct/gear drive (belt-free for efficiency)
Motor: High-efficiency IE3 / IE4 motors
Controller: Advanced electronic control (Delcos series)
⚙️ Performance & Engineering Highlights
High efficiency airend: Precision CNC-machined rotors improve output and reduce losses
Low oil carryover: ~2–3 ppm for cleaner compressed air
Durable piping: Stainless steel + coated carbon steel (long life)
Energy savings: Up to ~8% better efficiency vs older models
Service-friendly: Easy access panels, no pipe disconnection for maintenance
⚙️ 1. Detailed Technical Specifications
🧩 Power & Capacity
Motor power: 30 kW / 37 kW / 45 kW
Airflow (FAD): ~4.5 to 8.5 m³/min (depends on model)
Pressure range: 7 to 10 bar (standard industrial range)
Cooling type: Air-cooled (standard), water-cooled optional
⚡ Electrical & Efficiency
Motor class: IE3 / IE4 high-efficiency motor
Drive system: Direct or gear drive (no belt losses)
Energy savings: Up to 8% more efficient than older compressors
🧠 2. How It Works (Simple Explanation)
Air enters through inlet filter (99% efficiency)
Two rotating screw rotors compress air continuously
Oil is injected for:
Cooling
Sealing
Lubrication
Air + oil mixture passes through separator
Clean compressed air exits (oil carryover < 2–3 ppm)
👉 This design allows continuous, non-stop air supply, unlike piston compressors.
🔧 3. Key Features (Why Industries Prefer It)
🔹 High Efficiency Airend
Precision CNC rotors = better airflow + lower power loss
🔹 Low Oil Carryover
< 2–3 ppm → cleaner air, less contamination
🔹 Strong Build Quality
Stainless steel + coated piping → long life
No plastic piping → better durability
🔹 Intelligent Controller (Delcos)
Digital display
Fault alerts
Remote operation
Auto restart
🔹 Easy Maintenance
Open-access panels
No pipe removal needed for service
🏭 4. Industrial Applications
Used in:
Manufacturing plants
Automobile workshops
Textile factories
Food & packaging industries
CNC & pneumatic systems
💡 6. Buying Advice (Very Important)
Choose based on:
Continuous 24/7 operation → CompAir Li/L37–45
Variable air demand → Go for VFD (RS model)
Low budget → 30 HP standard compressor
Energy saving priority → L45e (premium efficiency)
