'Engineered excellently. Ingersoll Rand oil free centrifugal air compressors are not only the first and only to be certified ISO 8573-1:12001 Class 0, they offer efficient, economical and reliable solutions for delivering compressed air. This high performing, versatile compressor delivers the advantage of a compact design to a border range of customer and applications. From Plant Air, Engineered Air or N2, Process Gas, API with the flow until 15.000 cfm.