Elkhart Brass Extender 8598 - Manual (Page 8)

6
Nozzle Reaction Formula
STRAIGHT BORE NOZZLES
NR = 1.5 d ² NP
Where NR = Nozzle Reaction (Pounds)
d=Nozzle Diameter (Inches)
NP = Nozzle Pressure (psi)
1.5 is a constant
Equatio n 1
COMBINATION FOG NOZZLES
NR = 0.0505 Q P
Where NR = Nozzle Reaction (Pounds) Q = Flow (GPM ) P =
Nozzle Pressure (psi at base of nozzle) 0.0505 is a constant
This formula is with nozzle set on straight stream. Reaction will decrease as
pattern is widened to fog.
NOTES: