I have been reviewing threads on pumps running in parallel here and on other sites. I seem to find a lot of information on 2 pumps running in parallel and then the information on 3 pumps running in parallel and how it is pretty much useless……I have 4 pumps, all identical performance characteristics, all running at the same speed, all discharging into a common header and am attempting to develop a set of curves that accurately depicts what is happening as 2 pumps are running, 3 pumps are running and 4 pumps are running. It would seem though that after two pumps there is little to no change in performance. It this true or am I making to broad an assumption? The fact that the additional two pumps are not increasing my capacity or head of any appreciable quantity would not surprise me. I have been an engineer at this steel mill for a little over a year and have found some INTERESTING engineering solutions. Thanks in advance for any input you folks can provide.
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