Rotary Screw Air Compressors
Single and Two-Stage Lubricated Screw Compressors 160 - 250 kW
Fixed & Regulated Speed L160 to L250
By listening to our customer’s needs and wishes, and incorporating the latest technology and design concepts, CompAir has delivered an impressive range of compressors featuring higher free air delivery, new compact footprint, lower noise levels, new split radial cooling fan design, new controller, and many more features besides.
You’re referring to industrial-grade rotary screw air compressors in the 160–250 kW range, specifically fixed speed and regulated (variable speed) models like L160 to L250. Here’s a clear, practical breakdown of what that means and what to expect.
🔧 Overview of L160–L250 Rotary Screw Compressors
These machines fall into the heavy-duty industrial category, used for continuous operations like cement plants, steel, textiles, mining, and large manufacturing.
Power range: 160 kW to 250 kW
Type: Oil-lubricated rotary screw
Variants:
Fixed speed (constant RPM)
Regulated speed / VSD (energy-saving variable speed)
Example: CompAir L160–L250 series
⚙️ Key Features
High air output (FAD): ~1, 400 to 2, 600 m³/h depending on model
Working pressure: Typically 7.5–10 bar (can vary)
Oil-injected design: Ensures cooling, sealing, and lubrication
Continuous duty: Designed for 24/7 industrial use
Compact footprint: New designs combine high output with smaller space
🔄 Single-Stage vs Two-Stage (Important)
Single-Stage
Simpler design
Lower initial cost
Slightly lower efficiency
Two-Stage (Advanced / FourCore type)
Compresses air in two steps → higher efficiency
Better for high pressure & energy savings
Modern designs combine:
2-stage efficiency
Single-stage size footprint
👉 Some advanced models use “FourCore” airend technology (4 rotors, 1 motor) for improved efficiency.
⚡ Fixed vs Regulated Speed (VSD)
Fixed Speed
Runs at constant speed
Best for steady air demand
Lower upfront cost
Regulated Speed (VSD)
Adjusts motor speed based on demand
Saves 20–35% energy in variable load conditions
Ideal for plants with fluctuating air usage
🏭 Typical Applications
These compressors are used in:
Cement plants
Steel & foundries
Mining operations
Large textile mills
Food & packaging plants
✅ How to Choose (Practical Guidance)
When selecting between L160–L250 compressors, focus on:
Air demand stability
Constant → Fixed speed
Fluctuating → VSD
Energy cost vs budget
High electricity cost → choose 2-stage + VSD
Space constraints
New compact models (like FourCore) save space
Industry type
Harsh environments → heavy-duty models like Atlas Copco GA series
🧠 Bottom Line
These are high-capacity, mission-critical compressors
Two-stage + VSD models = best efficiency for modern plants
Fixed speed = cheaper but less flexible
Ideal for continuous, large-scale industrial air supply
