Turbo blowers for pressure and vacuum have a high yield at a relatively low pressure. By selecting a particular rotational frequency, the capacity of the Tower blower can be adjusted to one’s requirements. This is extremely useful when changing the process capacity, for example. The noise level of the Turbo blower is markedly lower than that of displacement compressors and operation is free of pulsation and vibration. The bearings have been placed outside the pumphouse, and are thus accessible without demounting the pumphouse, which is made from corrosion-proof aluminium. The Turbo blower is often used for aerating baths, cleaning soil and for larger biogas installations. For the latter application, the Turbo blowers are also available in Atex version. Thus they can be built with various types of Ex-motors.