Pumping system for a multi-stage pump
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United States of America Patent
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Sep 10, 2002
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N/A
app pub date -
May 10, 2000
filing date -
May 14, 1999
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Abstract
A pumping system for selectively activating the stages of a multi-stage centrifugal pump is provided. The pumping system has a first stage impeller for receiving fluid into the system and imparting rotational energy into the fluid. The system also has a second stage impeller for centrifugally imparting additional rotational energy into the fluid after the first stage impeller. A valve selectively closes an inlet to the second stage impeller so that the system operates as a single stage centrifugal pump while the second stage impeller remains wetted.
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