Centrifugal air compressors use centrifugal forces to create flow and pressure. Centrifugal technology is an extremely efficient way to generate compressed air.
 

The gearbox with the main drive shaft is driven by a motor. Both gearbox and main drive shafts drive the high-speed shafts with one or more impellers. Single-stage turbo compressors only have one impeller and deliver air at a pressure up to 2 bar(g).