Where Cavitation Begins – Cooling Tower Pumps and Piping

Norm Hall Cooling, Cooling Towers, Cooling Towers, Cooling Towers, Hydronic System Design, Monday Morning Minutes, Piping and Pumps, Pumps

Last week the R. L. Deppmann Monday Morning Minute defined NPSHR, and ended with the Hydraulic Institute (HI) definition as the absolute pressure that will cause the total head of the pump to be reduced by 3%, due to flow blockage from cavitation”. Of importance is the fact that it does not say that NPSHR is where cavitation begins.