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Fair point, my bad as I'm fairly sure the other thread I read was 25 psia, so I took at as a straight head conversion from NPSH. It's taking getting used to thinking of TDH, differential head, NPSH, and their respective pressures for sure. I'm overcomplicating it at this point. Just for my own...

Fair points LittleInch, I was ruminating on it more last night and settled on chasing adequate head performance at 27-40 gpm to allow for that higher flow requirement on the suction stroke of the plunger, with the rationale being that as far as flow is reduced due to plunger limitations, we're...

It is produced water, however the tank is treater fed and samples very clean. It's a good point, I'll be sure to add margin of safety on the vapor pressure head. This tank is skimmed.

Thank you guys for the response. Acceleration head definitely seems to be the big culprit here, I appreciate you folks catching that. We do indeed have a decently long run of suction piping (40' straight pipe, 102' of equivalent length including fittings) Estimating Hacc from GPSA: Hacc =...

Good afternoon all, I am having trouble explaining a cavitation issue where we apparently have adequate NPSHa for an existing triplex plunger pump moving produced water. Pump: https://www.pentair.com/content/dam/extranet/myers/sell-sheets/ma-60m-60h-triplex-plunger-pump-sell-sheet.pdf Aplex 60M...