Flow
Posted: Tue Aug 01, 2006 5:47 am
I am going to buy a 3/4" QEV and need to have a safty ballvalve in front of it, I was thinking if the flow of the QEV is 7.81Cv and the flow of a 1/2" Ballvalve is 8.053Cv then will I need a 3/4" Ballvalve safty or will it make no difference if I used a 1/2" Ballvalve?