Patent ID: 8414257

Claim:
A self-priming, centrifugal pump, comprising: a volute housing having a suction and discharge, the suction having a suction hopper connected thereto and the discharge having a discharge hopper connected thereto; a volute scroll having a cutwater and a volute scroll throat area, the volute scroll being disposed within the volute housing, the cutwater having a diameter; an impeller disposed within the volute scroll, the impeller having a relative exit area and an outer diameter; wherein a ratio of the volute scroll throat area to a impeller relative exit area is at least about 0.54; wherein a ratio of the volute scroll throat area to the cross-sectional area of the discharge is no greater than about 1.34; wherein a ratio of a volute scroll volume to the cross-sectional area of the discharge is no greater than about 73.60; wherein a ratio of the diameter of the cutwater to the outer diameter of the impeller is at least about 1.01; wherein a ratio of a volume of the discharge hopper to a volume of the suction hopper is no greater than about 1.89.