The pumps minimum requirements NPSH

Avoid zones C and D at all times. The pump ean be operated in zone B only if it is neeessary. 

In zone C the pump is operating to the right of the BEP and it is inadec]iiately designed for the system in which it is running. To a point 

In the final analysis, pumps should be operated at or near their BEP. These pumps will run for years without giving problems. The pump curve is the pump s control panel, and it should be in the hands of the personnel who operate the pumps and understood by them. 

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