Oil Free Air Compressors: Best Choice for Pure Air
Two Stage Oil Free Rotary Screw Compressors DS – Series
CompAir has extended its Oil Free rotary screw compressor range with the new DS37-DS150 fixed and variable speed series.
What it is:
Class Zero Oil FREE Rotary Screw Compressor
Nominal Power from 37-150 kW
Capacity of up to 25.9 m³/min (@ 7 bar g)
Complementing the established 160 to 315 kW model range
Fixed Speed and Variable Speed (RS) Models
Air-cooled
Numerous Further Options
We are pleased to announce the launch of new oil-free rotary screw compressor models, complementing the established CompAir D-Series range and delivering reliability, dynamic efficiency, lower operating costs, and high-quality oil-free compressed air.
The new models are:
Class Zero Oil Free Rotary Screw Compressor
Nominal Power from 37-150 kW
Capacity of up to 25.9m3/min (@ 7 bar g)
Complementing the established 160 to 315kW model range
Fixed Speed and Variable Speed models
Air cooled
Numerous Further Options
Highest productivity
Oil Free Class 0 certified air delivered for the most demanding industries
Intuitive Controller with extensive events history and advanced connectivity
The DS Series range from CompAir is able to withstand the harshest environments and 46°C maximum ambient temperature, reducing unplanned shutdowns caused by high heat, and increasing productivity.
Optimum efficiency
The range features a robust airend with precision machined gears, oversized bearings, stainless steel air seals, and unique labyrinth oil seal design to eliminate the risk of internal leaks.
Hot Air Discharge option for lowest pressure dew points without additional energy consumption via HOC dryer
Maximum reliability
Patented Ultracoat™ treatment of rotors and internalparts of compression chamber to avoid corrosion
Stainless Steel robust piping design on the cold side
Efficient inlet air filter for the best care of the air compressed path
IP65 electrical fittings and control panel
Value added services
Easy access to main components
No special tools required
8000 hours coolant change interval
Free iConn inside. A smart, proactive real-time online monitoring service that allows operators to manage the performance of the system through invaluable data statistics and insights, iConn will alert users should a potential issue with the compressed air system arise.
Service and warranty programs
Key Characteristics
✔ Two-Stage Compression
Air is compressed in two stages for improved efficiency and pressure stability compared to single-stage units.
✔ Oil-Free Output
Delivers contaminant-free compressed air suitable for highly sensitive environments — especially where oxidation, oils, or contaminants risk product safety or system integrity.
✔ Robust Construction
Models like DS Series use stainless-steel rotors, precision-machined gears, and effective sealing designs to ensure long life and minimal internal leakage.
✔ Energy Efficient & Reliable
Many systems include variable speed drives (VSD) and advanced motor technology (e.g., IE4/IE5) to optimize performance and reduce energy consumption.
✔ Easy Service & Control
Modern controllers provide intuitive touchscreen interfaces, connectivity options (e.g., Modbus, Ethernet), and diagnostic features for remote monitoring and predictive maintenance.
🛠 Benefits of DS Series Oil-Free Compressors
🌬 1. Pure, Clean Air Output
They deliver ISO 8573-1 Class 0 oil-free air, meaning no oil or lubricant traces even at microscopic levels — essential for sensitive processes like food packaging or pharma production.
🔋 2. Lower Operating & Lifecycle Costs
Thanks to features like VSD and efficient motor design, DS systems can deliver significant energy savings over time compared to older fixed speed or conventional compressors.
🏭 3. High Reliability & Durability
Corrosion-resistant parts
Advanced sealing systems
Designed for extreme climates (hot, dusty, or cold)
These design factors mean fewer breakdowns and longer service intervals.
🧠 4. Smart Control & Monitoring
State-of-the-art controllers with web connectivity and history logs make it easy to:
Track performance
Predict maintenance needs
Reduce downtime
This level of control improves uptime and avoids unplanned stops.
📊 Typical Applications
Oil-free, two-stage compressors like the DS series are widely used in industries where air quality is critical, including:
🍶 Food & Beverage Processing
💊 Pharmaceutical & Biotechnology
🖥️ Electronics & Semiconductors
🧵 Textiles
🚗 Automotive Painting and Assembly
🩺 Medical Devices and Healthcare Facilities
