Pump Glossary D

Design point

For the hydraulic calculation (selection) of a centrifugal pump, in general, the flow rate (Q), the head (H), and the speed (n) are needed. When used with an HQ curve, these ratings make up the design point of the selected centrifugal pump

Dry running

In the absence of liquid, flow parts running


Nominal diameter (nominal diameter), also known as the average outside diameter (mean outside diameter). Is the standardized diameter series of containers, pipes, and their accessories. 
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