What is Best Efficiency Point (BEP)?
Best Efficiency Point (BEP) is the capacity at maximum impeller diameter at which the efficiency is highest. BEP is in that many calculations such as specific speed suction specific speed, hydrodynamic size, viscosity correction, headrise to shut-off, etc. are based on capacity at BEP. Many users prefer that pumps operate within 80% to 110% of BEP for optimum performance. You will see most pumps have their BEP close to the mid part of their performance curve.
