Patent ID: 8123458

Claim:
A stacked pump arrangement for mixed-media flow comprising: a first centrifugal pump adapted to pump a mixed-media flow, which is self-priming, comprising a first impeller shaft and a volute having an inlet and an outlet; a second straight centrifugal pump adapted to pump the mixed-media flow mounted to an upper portion of the first centrifugal pump, the second straight centrifugal pump comprising a volute with an inlet and an outlet, and a second impeller shaft; and a transition chamber connected, at one end, to the first centrifugal pump volute outlet and connected, at another end, to the second straight centrifugal pump volute inlet for mounting the second straight centrifugal pump above and in vertical relation to the first centrifugal pump, wherein the first centrifugal pump, the transition chamber and the second straight centrifugal pump are stacked along a vertical axis, wherein a vertical center axis of the transition chamber is perpendicular to the first and second impeller shafts, wherein the first and second impeller shafts are substantially parallel to each other along their respective longitudinal axes, and the first and second impeller shafts are perpendicular to the vertical axis, wherein the first centrifugal pump comprises a first removable rotating assembly, and the second straight centrifugal pump comprises a second removable rotating assembly, and wherein the first removable rotating assembly is driven by a first power source, and the second removable rotating assembly is driven by a second power source.