Why NPSHR Changes With Impeller Diameter?

Written on February 1, 2011 at 10:43 pm, by

Introduction Confusion sometimes results when reviewing published NPSHR curves.  This is especially true when faced with trimming the impeller diameter to match changing operating conditions.  A well known fact is that the head-flow relationship varies with the diameter.  This can be accurately approximated by the affinity laws.  However, what happens to the NPSHR-flow relationship whenContinue Reading