Abstract
In automated food processing technology, pumps are used for the transport and the increase of pressure of low-viscosity, liquid products. To ensure a hygienically and microbiologically perfect condition of the product, high standards are applied to turbo machines and positive displacement pumps with regard to hygiene and cleaning technological requirements. These standards apply to all pumps used in the food processing industry, including centrifugal pumps, piston pumps, rotary pumps, peristaltic pumps, diaphragm pumps, water ring pumps, positive-displacement pumps, screw pumps, gear pumps as well as to homogenizers, dampening devices, and finally all valves integrated in the pump body. Concerning centrifugal pumps, it is common practice to flange the pump directly to the motor. This has the advantage of a more compact pump design. Open couplings as used in the conventional pump design where the motor is mounted on a ground plate are not needed. If motors with special shafts are used, the impeller is plugged on to the motor shaft or the pump shaft is plugged on to the motor shaft of a standard motor. In this case, depending on the pump size and/or axial forces, reinforced bearings, integrated bearing flanges, and measures against axial thrust are required.
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