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
The range covers air-cooled models from 37 to 150 kW and is available in both fixed and variable speeds delivering ISO 8573-1:2010 Class 0 certified 100% oil-free air for the most critical applications, e.g. within the food and beverage, pharmaceutical, textile, and electronics industries.
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
Oil-free air compressors are the ideal solution for industries that require clean, contamination-free compressed air. Unlike lubricated compressors, these machines deliver air without any oil carryover, ensuring high purity and reliability for sensitive applications. Two-stage oil-free rotary screw compressors such as the DS Series are specifically engineered to provide efficient, high-capacity, and completely oil-free compressed air.
An oil-free air compressor compresses air without using oil in the compression chamber. This ensures that the compressed air remains 100% free from oil contamination, making it suitable for industries where air quality is critical.
Typical industries using oil-free compressors include:
Pharmaceutical manufacturing
Food & beverage processing
Electronics production
Medical and healthcare facilities
Automotive painting and coating
These sectors require ISO Class 0 oil-free air, the highest air purity standard.
Two-Stage Oil Free Rotary Screw Compressors – DS Series
The DS Series compressors use a two-stage compression system that improves efficiency and performance compared with single-stage machines.
Key Specifications
Power range: 37 – 150 kW
Air capacity: Up to ~25.9 m³/min at 7 bar
Available in fixed speed and variable speed models
Air-cooled design with multiple configuration options
Higher-capacity models can reach 40–80 m³/min flow and up to 280–450 kW power depending on the configuration.
Main Features of DS Series Compressors
1. Two-Stage Compression Technology
The DS Series uses two compression stages with advanced rotor design to deliver higher efficiency and lower energy consumption.
2. High-Efficiency Rotors
Stainless steel rotors
Durable coatings
Optimized housing design
These components improve durability and performance while maintaining oil-free air quality.
3. Intelligent Control System
Modern DS compressors include touchscreen controllers that allow operators to:
Monitor system performance
Analyze operating trends
Control compressor functions easily
4. Easy Maintenance Design
The system includes:
Hinged service panels
Removable air ends
Accessible service points
This design reduces downtime and maintenance costs.
