ANSI/HI 9.6.7-2015 pdf free download.Rotodynamic Pumps – Guideline for Effects of Liquid Viscosity on Performance. 9.6.7.3.2 Methods for determining correction factors Correction factors can be either defined empirically from a data bank containing measurements on various pumps with water and liquids of different viscosities or from a physical model based on the analysis of the energy losses in the pump....