Dustcontrol’s turbopumps are regener­ative blowers, both the direct and belt driven models. As the impeller rotates, centrifugal force moves the air from the root of the blade to the tip. Leaving the tip, air flows around the contour of the housing and is picked up at the root of the succeeding blade. The ”closed” area of the housing between the outlet and inlet, forces the air to atmosphere. The many blades on the impeller create increasing stages of pressure generation and result in a very stable pressure differential capability. This pressure generation causes heat to be generated naturally which dissipates in the air-flow and through the blower housing. Silencing, particularly on the larger units is very effective. When two or more units are installed in parallel, they can be operated on demand for maximum efficiency and minimum energy consumption.