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Volume or pressure, who knows. . .?
You need to see the pump curve
http://www.engineeringtoolbox.com/pu...ves-d_635.html
and play that curve against all the factors already mentioned.
It's the same with HVAC fan curves and vacuum tube transconductance curves; use a graphical method to solve it.
Last edited by Thatguy; 05-17-2009 at 02:08 PM.
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