Oil Free Air Compressors: Best Choice for Pure Air
Oil Free Rotary Screw Compressor
CompAir DH - 100% air purity that meets stringent quality standards
These oil-free air compressor models contain absolutely no oil anywhere in the compressor and have been certified ISO 8573-1 Class Zero (2010) and silicone free.
Water injected, silicone free and oilfree air
Industries such as Electronics, Chemical, Pharmaceutical, Food and Beverage depend upon pure oil-free compressed air as a safe, clean energysource to drive production lines. Sometimes the air comes intodirect contact with the product being created, so it is criticalthat the purity of this air is maintained at all times. You cansee how this is achieved by the DH series in this video - click the design tab, to watch this. The DH Series comprises of the following features:
Single-stage, direct-driven compression element maximises efficiency and minimises maintenance
High quality water injection lubricates, cools and seals the compression process, maximising efficiency
No gearbox means no need for associated oil lubrication
Low bearing loads and low speeds mean sealed-for-life bearings can be used, requiring no oil lubrication
Regulated speed technology available to reduce energy costs
Comprehensive control ensures safe and reliable operation and includes remote communication capability
Fully packaged and silenced enclosure reduces noise and simplifies installation
Oil-Free Rotary Screw Compressor – CompAir DH Series
The CompAir DH Series Oil‑Free Rotary Screw Compressor is designed to deliver 100% oil-free compressed air, meeting the most stringent air-quality standards required in sensitive industrial environments. These compressors contain no oil anywhere in the compression process and are certified ISO 8573-1 Class 0, ensuring completely clean and contamination-free air.
Oil-free air compressors are engineered to compress air without oil lubrication in the compression chamber, preventing contamination in the air stream. This makes them ideal for industries where air purity is critical.
Key Advantages
100% Pure Air Output – Eliminates oil contamination risk
Regulatory Compliance – Meets strict standards like ISO 8573-1
Reduced Maintenance – No oil filters, separators, or disposal
Safer Operation – Lower fire and contamination risks
Reliable for Sensitive Applications
Typical Industries Using Oil-Free Compressors
Pharmaceuticals
Food & Beverage production
Electronics manufacturing
Chemical processing
Medical and dental facilities
Laboratories and research centers
These industries rely on clean compressed air because compressed air often comes in direct contact with products or equipment during manufacturing.
How the Oil-Free Rotary Screw Compressor Works
A rotary screw compressor uses two interlocking helical rotors that rotate to compress air continuously.
Process:
Air enters the compressor inlet.
Rotors trap and compress the air as they rotate.
Clean compressed air exits without oil contamination.
Unlike piston compressors, this design provides continuous, smooth airflow with minimal vibration and noise, making it ideal for industrial operations running 24/7.
Key Features of the CompAir DH Series
Water-Injected Compression – Water lubricates, cools, and seals the compression process for maximum efficiency.
Single-Stage Direct Drive – Improves efficiency and reduces maintenance.
No Gearbox Required – Eliminates oil lubrication systems.
Low Bearing Load & Low Speed Operation – Longer component life and reliability.
Variable Speed Technology – Helps reduce energy consumption.
Fully Enclosed & Low Noise Design – Simplifies installation and improves working conditions.
Typical Technical Range
Power: 15–110 kW
Pressure: 5–10 bar
Air Flow: up to ~18.5 m³/min depending on model
Why Oil-Free Rotary Screw Compressors Are the Best Choice
✔ Continuous industrial duty (24/7 operation)
✔ High energy efficiency
✔ Low vibration and noise
✔ Long service life
✔ Guaranteed contamination-free air
Because of these advantages, oil-free rotary screw compressors are widely considered the premium solution for industries requiring ultra-clean compressed air.
✅ Summary:
If your operation demands pure, contamination-free compressed air, the CompAir DH oil-free rotary screw compressor provides reliable performance, high efficiency, and ISO-certified air purity, making it an ideal choice for modern industrial applications.
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Comparison: Oil-Free vs Oil-Lubricated Compressors.
