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: Why They’re the Best Choice for Pure Air
Oil-free air compressors are specifically engineered for applications where air purity is critical—such as pharmaceuticals, food & beverage, electronics, and healthcare. Unlike conventional compressors, they eliminate any risk of oil contamination in the compressed air stream.
🔑 Key Advantages
100% clean air: No oil carryover → zero contamination risk
Lower operating cost: No oil changes, less filtration needed
Eco-friendly: Meets strict environmental and ISO air quality standards
Low maintenance: Fewer components and no lubrication system
Quiet operation: Reduced vibration and noise
Oil-Free Screw Compressors (Technology Overview)
Oil-free screw compressors are among the most advanced types of compressors. Instead of using oil for sealing and cooling, they use:
Dry screw elements or water injection
Two-stage compression for higher efficiency
Precision engineering to maintain tight tolerances without lubrication
⭐ CompAir Ultima™ – Next-Generation Oil-Free Compressor
The CompAir Ultima™ series is a breakthrough in oil-free screw compressor technology, designed for maximum efficiency and pure air delivery.
🚀 What Makes Ultima™ Unique?
1. 100% Oil-Free Air (Class Zero)
Certified to ISO 8573-1 Class 0, the highest air purity standard
Ideal for sensitive industries like pharma and food processing
2. Dual Motor “Digital Gearbox” Design
Uses two independent permanent magnet motors
Each airend operates at optimized speed → higher efficiency
3. Exceptional Energy Efficiency
Saves energy compared to traditional compressors
Up to 45% less energy during idle operation
Achieves IE5-level efficiency (top-tier performance)
4. Compact & Space-Saving
Up to 37% smaller footprint than conventional systems
5. Heat Recovery System
