Brian,
Did you mean to say the pump sits 7' below the tank outlet in the bottom
of the tank?This still wouldn't get you the 71.5 static.Maybe the
designer is using the actual shop certified curve plus the elev. head
from the tank,or as Ron mentioned,this is an actual pump test result.
LV
On Thu, Jun 2, 2011 at 9:30 AM, Brian Harris wrote:
Reviewing some calc's for a job that has a 30,000 gallon tank
(gravity) that
feeds a 500gpm @ 65psi pump that sits approx. 7' below the pump
suction, no
other sources of water supply. The current calc's show a static
pressure of
71.5, residual of 65, and a flow of 500. I'm having a hard time coming
up
with the static of 71.5, what am I missing?
Brian Harris, CET
First Defense Fire Protection
11957 Ramah Church Road
Huntersville, NC 28078
Phone: 704.948.3506
Fax: 704.948.3507
Nicet # 128476
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