Stacked self-priming pump and centrifugal pump

A pump arrangement comprising:

• a first centrifugal pump adapted to pump a mixed-media flow, which is self-priming, comprising a volute having an inlet and an outlet, and a first rotating assembly comprising a first impeller shaft and impeller;
• and
• a second straight centrifugal pump, adapted to pump the mixed-media flow, mounted externally to an upper portion of the first centrifugal pump, the second straight centrifugal pump comprising a volute with an inlet and an outlet, a second rotating assembly comprising a second impeller shaft and impeller, and
• a transition chamber connected, at a first end, to the first centrifugal pump volute outlet and connected, at a second end, to the second straight centrifugal pump volute inlet, the transition chamber serving as a structural support for mounting the second straight centrifugal pump above and in vertical relation to the first centrifugal pump such that a portion of the weight of the second straight centrifugal pump is transferred to the first centrifugal pump;
• wherein a vertical center axis of the transition chamber is perpendicular to the first and second impeller shafts, and
• wherein the first and second impeller shafts are substantially parallel to each other along their respective longitudinal axes.

A pump arrangement comprising:

• a first centrifugal pump adapted to pump a mixed-media flow, which is self-priming, comprising a volute having an inlet and an outlet, and a first rotating assembly comprising a first impeller shaft and impeller;
• and
• a second centrifugal pump adapted to pump the mixed-media flow, which is a straight centrifugal pump, mounted externally to an upper portion of the first centrifugal pump, the second centrifugal pump comprising a volute with an inlet and an outlet, a second rotating assembly comprising a second impeller shaft and impeller, and
• a transition chamber connected, at a first end, to the first centrifugal pump volute outlet and connected, at a second end, to the second centrifugal pump volute inlet, to provide a flow path for mixed media flow between the first centrifugal pump and the second centrifugal pump,
• wherein the transition chamber serves as a structural support for mounting the second centrifugal pump above and in vertical relation to the first centrifugal pump such that a portion of the weight of the second straight centrifugal pump is transferred to the first centrifugal pump,
• wherein a vertical center axis of the transition chamber is perpendicular to the first and second impeller shafts, and
• wherein the first and second impeller shafts are substantially parallel to each other along their respective longitudinal axes.

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;
• and
• 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, the transition chamber serving as a structural support for mounting the second straight centrifugal pump above and in vertical relation to the first centrifugal pump such that a portion of the weight of the second straight centrifugal pump is transferred to the first centrifugal pump,
• wherein the stacked pump arrangement has a footprint equal to a footprint of the first centrifugal pump, and
• wherein the first and second impeller shafts are substantially parallel to each other along their respective longitudinal axes.