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.
Considering that the highest cost in the lifecycle of a compressor is the energy to run it, the unique design of Ultima has allowed us to combine the ultimate performance with the ultimate efficiency, and still deliver a footprint 37% smaller than a conventional two-stage oil-free compressor. This allows easy installation in the smallest possible space – more than a benefit where space is limited – it is a real property cost saving.
Ultima™ - the real deal
Ultima compressors are 100% oil and silicone-free and meet ISO 8573-1 Class Zero (2010), making them the ideal choice for stringent oil-free applications within food and beverage, pharmaceutical, electronic and the automotive industries. What makes this compressor series unique is the lack of a gearbox. Ultima uses ultra high efficiency direct drive motors which replace the gearbox and the single motor, which optimise performance throughout the complete volume range, as the airends can be driven at different speeds dependant on the demand. With a single motor driving both airends together this is not possible. This is where Ultima is hard to beat.
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
Oil-Free Air Compressors: Best Choice for Pure Air
Oil-free air compressors are widely considered the best solution when air purity is critical. Unlike oil-lubricated systems, they do not allow oil to enter the compression chamber, ensuring clean, contaminant-free air.
🔑 Key Advantages
100% oil-free air – essential for sensitive industries (food, pharma, electronics, medical)
Low contamination risk – protects products and processes
Reduced maintenance – no oil changes or disposal required
Environment-friendly – no oil carryover into pipelines
🏭 Common Applications
Food & beverage processing
Pharmaceutical manufacturing
Hospitals & dental clinics
Electronics & semiconductor production
Painting and coating operations
👉 In these sectors, even tiny oil traces can damage products or violate quality standards—making oil-free compressors the preferred choice.
Oil-Free Screw Compressors (Advanced Industrial Solution)
Oil-free screw compressors are a high-performance industrial variant of oil-free technology.
⚙️ How They Work
Use two interlocking screw rotors to compress air
Rotors are synchronized with timing gears (no direct contact)
Special coatings and precision engineering eliminate the need for oil
🚀 Key Benefits of Oil-Free Screw Compressors
1. Ultra-Clean Air (Class 0 Standard)
No oil contamination at any stage
Ideal for critical manufacturing environments
2. Continuous Operation
Designed for 24/7 industrial use
Stable airflow and high efficiency
3. Lower Maintenance (in some aspects)
No oil filtration or replacement
Fewer risks of system contamination
4. Energy Efficiency
Advanced rotor design reduces friction and energy loss
Suitable for large-scale operations
⚖️ Oil-Free vs Oil-Lubricated Screw Compressors
Feature Oil-Free Screw Oil-Lubricated Screw
Air Quality 100% clean Risk of oil carryover
