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Sprinkler Hydraulics

How do I find the initial sprinkler pressure requirement? by skdesigner
Posted: 13 Dec 10 (Edited 16 Dec 10)

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

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