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.
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
Oil-Free Air Compressors: Best Choice for Pure Air
Oil-free air compressors are designed to deliver 100% contaminant-free compressed air, making them essential for industries where air purity is critical—such as food & beverage, pharmaceuticals, electronics, and textiles.
Unlike oil-lubricated compressors, they eliminate the risk of oil carryover, ensuring ISO 8573-1 Class 0 certified air quality—the highest standard available.
Why Choose Oil-Free Compressors?
No contamination risk – protects sensitive products and processes
Lower maintenance costs – no oil filtration or disposal
Regulatory compliance – meets strict hygiene and safety standards
Improved reliability – fewer chances of system failure due to oil issues
Two-Stage Oil-Free Rotary Screw Compressors – DS Series
The CompAir DS37–DS150 series is an advanced range of oil-free rotary screw compressors designed for high efficiency, durability, and consistent performance.
Key Features
Class 0 oil-free air (ISO 8573-1 certified)
Power range: 37 to 150 kW
Capacity: up to 25.9 m³/min at 7 bar
Two-stage compression for improved energy efficiency
Fixed speed & variable speed (RS) models
Air-cooled design for easier installation
Smart control systems with monitoring and diagnostics
Performance Advantages
1. High Efficiency
Two-stage compression reduces energy consumption
Variable speed models match output to demand, saving power
2. Maximum Reliability
Advanced rotor coating prevents corrosion
Stainless steel components increase durability
Designed to operate in harsh conditions (up to ~46°C ambient)
3. Consistent Air Quality
No oil used in compression → zero contamination risk
Ideal for critical applications like cleanrooms and processing lines
4. Lower Operating Costs
Reduced maintenance intervals
Energy-efficient operation lowers lifecycle cost
Typical Applications
Oil-free compressors like the DS series are widely used in:
Food & beverage production
Pharmaceutical manufacturing
Electronics and semiconductor industries
Textile processing
Chemical plants
These sectors require clean, dry, and oil-free air to avoid product damage or safety risks.
Bottom Line
The DS37–DS150 oil-free rotary screw compressors represent a high-performance, energy-efficient, and contamination-free solution for modern industries.
If your operation depends on air purity, reliability, and long-term cost savings, oil-free compressors are not just an option—they’re the best choice.
