Therefore, it is an object of the subject invention to provide a high efficiency centrifugal pump which meets low-specific speed requirements.

The subject invention fulfills the above-stated object by providing a centrifugal pump comprised of a discontinuous discharge rotor having an extended length axial intake passageway connected to a plurality of radially extending discharge passageways of constant or slightly convergent cross section, a spiral collector for directly receiving the fluid flow from the discharge passageways including a first portion of constant radial depth to minimize friction losses,Water Pump Control Valves and a diffusor aligned with and extending substantially across the outlet end of the spiral collector. The innermost leading edge of the diffusor is blunt in shape. This centrifugal pump structure provides pump efficiencies of greater than 40 percent when operating with a liquid at low-flow rates.FILTER SERIES The subject matter which is regarded as the present invention is particularly pointed out and distinctly claimed in the concluding portion of this specification .

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2011-12-02

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