PARSIPPANY, NJ -- The Hydraulic Institute (HI) has published “ANSI/HI 9.6.1–2012 Rotodynamic Pumps Guideline for NPSH Margin.” The new guideline serves as a replacement for the 1998 edition, which was later withdrawn completely in 2003.
This guideline covers rotodynamic, general-purpose pumps with power levels as high as 5300 hp and impeller tip speeds less than 130 feet per second, and describes the benefits to pump longevity of maintaining suitable NPSH margin.