Importance

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Abstract

A delivery pump for conveying a liquid between a pump inlet and a pump outlet, the pump being constructed as a single-stage centrifugal pump with a radial impeller (2) having a centrifugal construction arranged rotatably in an impeller chamber (6) of a pump casing (1); the impeller being connected to a variable-speed drive motor (5) variable in speed into the five-digit range of revolutions per minute, and the impeller receiving liquid flow centrally, and being provided with radially-extending delivery ducts (3), and at outside impeller diameters of up to 55 mm developing rotational speed-dependent delivery heads of up to 300 m. For use in a process engineering system, the delivery pump is designed for nominal operation in the form of continuous centrifugal pump part-load operation with delivery rates in the range of 0 ml/min to 7000 ml/min; the nominal operation is characterized by a centrifugal pump part-load-specific rotational speed nq.sub.TL.gtoreq.0.05.ltoreq.10 (l/min), and the impeller chamber (6) comprises one or more pump outlet ducts (13) located on the circumference at acute angles to or tangentially to the outside diameter of the radial impeller.

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First Claim