Ingersoll Rand Rotary Oil-Free (5-1000 HP) air compressors, allow you not to worry about contaminated air. Our oil-free rotary screw air compressors have been vigorously tested by TÜV Rheinland - a global leader in independent testing and assessment services – and earned ISO 8573-1:2001 Class 0 certification. No matter what your product, process or location, Ingersoll Rand has the expertise and oil-free technology to meet your needs.Anest Iwata was the first in the world to develop air-cooled, oil less scroll compressors. Now we have taken our patented scroll technology and incorporated it into our premium line of SL series oil less scroll pumps. As air demand fluctuates during the day, the multiple air-end control systems allows you to adjust and save money. The scroll is the best-selling oil less air compressor.