Tom, I guess once we equate what goes out of the tachometer with what
goes into the thermometer, the speed does not change-- the magic of
the second law of thermodynamics! (or, as you put it-- 'Pump affinity').
Quoting Tom Duross <tduro...@comcast.net>:
Brad, we measure rpm as a means of adjusting pressures to rated
speed. These pumps are magic and speed is not supposed to change.
Pump affinity. Also, when you have more than one pipe size
difference between discharge and suction, you should adjust for
velocity pressure (or read discharge after the increaser).
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