The performance of a centrifugal pump with a trimmed impeller will follow the affinity laws as long as that trim is relatively small.
I am having a tough time finding pump manufacturers who offer NSF certified pumps. It sounds simple enough at face value but many searches and conversations have been futile. Maybe you know of a few possible suppliers.
Walking the system and asking questions before taking measurements is vital.
Thorough analysis, testing and upgrades renew the life of an old single-stage, double-suction, horizontal split-case pump.
Want full visibility of pump performance to facilitate operation as close to BEP as possible within your production constraints – from your cellphone? Then this is the way to go.