Translations:Pumpen, Betriebs- und Regenwasserwerke/147/en

$V_{n}={\frac {0.33\times Q_{maxA}\times (p_{a}+1)}{((p_{a}-p_{e})\times s\times n)}}$

n	=	pump number
s	=	switching frequency, normally 20/hr
QmaxA	=	operating point flow rate, m³/hr