Oil Free Air Compressors: Best Choice for Pure Air
Oil Free Screw Compressors
CompAir Ultima™
100% oil and silicone-free for clean air critical applications
Ultima™ is CompAir's groundbreaking oil-free PureAir screw compressor with a unique design. It is a brand new compressor range and it utilises a low pressure and high pressure dry screw airend. Each airend is individually driven by a variable speed, permanent magnet synchronous motor, offering exceptional levels of efficiency versus traditional oil-free technology.
CompAir is always improving the best products to be even better and more cutting edge.
The Ultima utilises an intelligent “digital gearbox“ design, which continuously monitors and independently adjust the speeds of each airend, ensuring maximum efficiency and pressure ratios at all times. When any regulated speed compressor gets to the minimum speed, it goes into idle run. For any compressor, this is wasted energy. Ultima uses 45% less energy in idle run than a conventional two-stage compressor and a 160kW compressor uses only 8 kW in idle run.
It is available with iConn remote monitoring. iConn is the all new and smart, proactive real-time monitoring service that delivers in-depth and real-time knowledge on the system to our compressed air users. It enables accurate production planning and total peace-of-mind protection, generating insight and statistics that keep users informed on performance, at the same time highlighting potential issues before they become a problem.
It's compact, low maintenance, high capacity, and exceeds industrial expectations.
100% oil and silicone free - Highest levels of air quality
Highest efficiency levels - Low running costs
Low noise design - Installation at point of use
LP & HP airends individually driven - Energy efficient across the flow range
Very efficient heat recovery - Most efficient machine
Easy installation - No ducting required
On-board monitoring - Very user-friendly
Available with iConn remote monitoring - IoT connected
🌬️ Why Choose Oil-Free Air Compressors
Oil-free compressors deliver 100 % pure compressed air, meaning no oil or oil-derived contaminants in the output. This is critical for:
Food and beverage production
Pharmaceuticals & medical air
Electronics & semiconductor manufacturing
Laboratories and analytical instruments
Unlike oil-lubricated compressors, oil-free models eliminate the risk of oil carry-over into your end process — improving product quality, reducing filtration costs, and avoiding costly contamination issues.
🌀 Benefits of Oil-Free Screw Compressors
These compressors use advanced screw elements with no oil in the compression chamber, offering advantages such as:
✅ Pure and Clean Air
Oil-free systems produce air that meets ISO 8573-1 Class 0 purity (zero risk of oil contamination) — essential where even tiny oil traces are unacceptable.
⚙️ Lower Lifecycle Costs
No oil to buy, replace, or dispose of
Reduced need for oil-separation filters and condensate treatment
Fewer consumables and maintenance steps over time
💡 Energy Efficiency & Innovation
Newer designs — like CompAir Ultima — use direct drive and variable-speed permanent magnet motors for higher efficiency and lower running costs than traditional oil-free compressors.
🛠 Lower Noise & Installation Ease
Many oil-free screw compressors are quieter and more compact, enabling installation closer to the point of use and reducing piping losses.
♻️ Environmentally Friendly
No oil in compressed air systems eliminates environmental discharge concerns and helps meet sustainability targets.
🚀 Spotlight: CompAir Ultima™
The CompAir Ultima™ range represents one of the most advanced oil-free screw compressor technologies available:
🔎 Key Features
🧠 100% oil- and silicone-free air for strict industrial applications.
🔌 Individual Variable-Speed Motors on each compression stage for optimized efficiency across operating ranges.
🎯 ISO 8573-1 Class 0 Certified — ideal for the most stringent purity requirements.
🌀 Compact footprint (up to ~37 % smaller than traditional two-stage oil-free compressors).
🔥 Advanced heat recovery and low noise levels — saving energy and reducing operating costs.
📊 Smart monitoring (iConn) for remote performance insight and predictive maintenance.
🧠 Summary: Why Oil-Free Is the Best Choice for Pure Air
If your process requires guaranteed oil-free air, especially where contamination cannot be tolerated (medical, pharma, food, electronics), oil-free compressors are often the most reliable and cost-effective long-term solution. The CompAir Ultima™ range is a top-tier option, combining Class 0 purity, high efficiency, smart controls, and compact design to deliver pure air with lower operating costs.
