September 2012

Head, performance curve and affinity laws all contribute to the efficiency of centrifugal pumps.
A Tennessee community review shows increasingly positive operation and maintenance statistics.
A spiral rotor and even-wall stator improve pumping pressure and flow.
To avoid premature drive failure, proper precautions must be taken when installing VFDs on open-delta supplies.
Equipment and technology improvements can be sound investments.
In the food industry, stainless steel performs more productively and efficiently.
Last of Two Parts
A simple mathematical model can be used to estimate vibration at the top of the motor in a vertical pump-motor structure.

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