The Ingersoll Rand W-Series Oil-Free Scroll Compressors generate Class 0 oil-free air quality with quiet operation. The W-Series scroll compressors use an orbital wheel single-stage technology. Two interlacing spiral scroll pumps compress and pressurize the air. One scroll remains in a fixed position, while the other scroll orbits around it without rotating. The motion traps the air in the pockets between the two scrolls and pushes the air towards the center. As the air moves closer to the center, the pockets shrink, and the air compresses. With four basic configurations, users can choose from energy-efficient models from 2kW to 30kW. The W-Series models are available in eight ratings from 3hp to 40hp.