Pump unit and method for operating a pump unit
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United States of America Patent
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Sep 4, 2007
Grant Date -
Mar 18, 2004
app pub date -
Dec 22, 2000
filing date -
Dec 22, 2000
priority date (Note) -
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Abstract
The method is provided for operating a pump unit with a centrifugal pump which is driven by an electric motor and which comprises a rotor running in a split tube. The rotor space is separated with respect to the stator in a fluid-tight manner. On running the motor to its operational rotational speed the fluid located in the rotor space due to the increasing rotational speed evaporates and is removed so that the motor finally functions as a dry-runner.
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