Impellers are rotating devices designed to alter the flow and pressures of liquids, gasses, and vapors. Impellers consist of various vanes- often blade - shaped - arranged around a short central shaft. When the shaft and vanes rotate - they suck in fluids or gasses and impel them out the other side. These impellers are typically found in - and are integral components of - centrifugal pumps, agitation tanks, washing machines, and other devices requiring fluids or gasses to move in a specific direction. As a driven rotor, it increases the pressure and flow of a fluid.