Conversion of NPSH-Values to Another Speed: Quadratic or Not? | Part 1

The conversion of the head (H) of centrifugal pumps from the speed n1 to the speed n2 can be done by means of the well-known equation H2 / H1= (n2 / n1)2. This equation is however, also valid for the conversion of Net Positive Suction Head (NPSH) to another speed?