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
✔️ 100% Oil-Free, Pure Compressed Air
Oil-free compressors — especially rotary screw types — don’t introduce oil into the compression chamber, so the outlet air is free from oil contamination. This is critical where air quality affects product safety, hygiene, or sensitive equipment.
✔️ Essential for Many Industries
Oil-free compressed air is typically required in:
Food & beverage production
Pharmaceutical manufacturing
Electronics & semiconductor fabrication
Medical and dental facilities
In such sectors, even trace amounts of oil can damage products or violate regulatory requirements.
✔️ Lower Operating / Maintenance Costs
While oil-free compressors (especially rotary screw types) often have a higher upfront cost, they usually save money over time because:
No oil changes or oil disposal
Fewer filters and separators required
Reduced risk of oil-related maintenance issues
These factors reduce downtime and long-term cost of ownership.
✔️ Improved Efficiency and Environmental Impact
Oil-free screw compressors avoid pressure drops from oil-removal filtration and eliminate oil waste — contributing to better energy efficiency and a smaller environmental footprint.
📊 Oil-Free Rotary Screw vs. Oil-Lubricated (Quick Comparison)
Feature Oil-Free Rotary Screw Oil-Lubricated Screw
Air Purity ⭐⭐⭐⭐⭐ 100% oil-free ❌ May have traces
Maintenance Lower (no oil systems) Higher (oil changes)
Energy Efficiency Moderate to high Generally higher
Cost Higher upfront Lower upfront
Best Use Sensitive air quality needs General industrial use
Choose oil-free rotary screw if:
Clean, uncontaminated air is required for your process or industry.
You want compliance with high air-quality standards (e.g., ISO 8573-1 Class 0).
Long, continuous operation is needed with dependable performance.
Consider small oil-free models if:
You’re running a workshop, garage, or small-scale production where oil-free air is beneficial but industrial-level capacity isn’t needed.
