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How do I find the initial sprinkler pressure requirement?
Sprinkler Hydraulics
Q=K(P^.5)
Where:
Q= Flow (USGPM)
K= Sprinkler Orifice Coefficient
P= Pressure (psig)
Re-arrange for P:
P=(Q/K)^2
Q also = coverage area per sprinkler(sq.ft)* Density(gpm/sq.ft)
(sq.ft cancels, leaving GPM)
Therefore,
P=[(a*d)/k]^2
Where:
Q= Flow (USGPM)
K= Sprinkler Orifice Coefficient
P= Pressure (psig)
Re-arrange for P:
P=(Q/K)^2
Q also = coverage area per sprinkler(sq.ft)* Density(gpm/sq.ft)
(sq.ft cancels, leaving GPM)
Therefore,
P=[(a*d)/k]^2