High Pressure Blowers than those which can be achieved using centrifugal fans. Side Channel exhausters are used in all those applications requiring an operating vacuum higher than the one achievable by a fan, but not as to require the use of a vacuum pump. The rotating parts are not in contact with the casing. There is, therefore, no friction during operation and thus no internal lubrication is necessary. CNC Machined For Close Tolerances And Better Performance.