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:
DH series machine
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
An oil-free air compressor is designed to compress air without the need for oil lubrication in the compression chamber.
✔️ No oil in the air stream → far cleaner output
✔️ Less contamination → safe for sensitive equipment, food processing, medical use, electronics, and labs
✔️ Lower maintenance related to oil handling
These compressors use special materials and designs (like Teflon®, advanced coatings, ceramic bearings, etc.) to reduce friction without oil.
🏭 Why Choose Oil-Free Air Compressors
🌟 Main Benefits
Pure Air Output — ideal for applications where air quality is critical
No Risk of Oil Carry-Over — eliminates contamination of pipelines, products, or end-use tools
Lower Operating Hazards — fewer fire risks and safer in controlled environments
Regulatory Compliance — easy to meet strict air purity standards (e.g., ISO 8573-1)
📌 Common Applications
Pharmaceutical manufacturing
Food & beverage production
Dental and medical clinics
Electronic parts manufacturing
Paint booths & precision tools
Research laboratories
🔧 Oil-Free Rotary Screw Compressors Explained
The oil-free rotary screw compressor is a premium choice among oil-free compressors — especially for continuous industrial duty.
🔩 How It Works
Instead of pistons, it uses two interlocking helical rotors inside a precision-machined chamber:
Air enters the inlet
Rotors trap and compress the air as they turn
Output is clean compressed air — with no oil introduced in compression
🌟 Why This Type Is Excellent
✔ Continuous Duty – ideal for 24/7 industrial use
✔ High Efficiency – smooth compression with less heat buildup
✔ Low Vibration & Noise – smoother operation than piston models
✔ Better Air Quality – often meets very strict oil-free classifications
✔ Longer Component Life – less wear without oil in compression chamber
⚙️ Tips Before You Choose
✔ Check ISO air quality class required for your application
✔ Match the compressor’s capacity (CFM) to your demand
✔ Consider cooling system, filtration, and drainage needs
✔ Factor in service support and local spare parts availability
📌 Summary
✅ Best For
Sensitive, contamination-intolerant environments
Continuous industrial operations
Compliance with strict air purity standards
🏆 Best Choice
👉 Oil-Free Rotary Screw Compressors — excellent efficiency, reliability, and truly pure compressed air.
