Description: Design flow rate in the pump inlet port divided by the inlet cross-section of the pump; Name: average design speed in the inlet
Description: rated flow at pump inlet connection divided by the inlet area of the pump; Name: mean rated velocity at inlet
Description: ten times the logarithm to the base 10 of the ratio of the sound power of a source, p, to a reference value, p0, expressed in decibels; Name: sound output level