Brass Resticting Disc
Function: Used to reduce water pressure at hose line by restricting flow. Brass disc with orifice size as ordered.
Model 2770 ........................... 1½"/3.8cm
Model 2771 ........................... 2½"/6.4cm
Sizing Information:
A = 0.0425
A2 = Orifice Size in Squeare Inches
Q = Flow in GPM
P1 = Inlet Pressure
P2 = Required Outlet Pressure
0.0425 x GPM/lpm divided by square root of difference between inlet pressure and required
outlet pressure results in orifice size, in square inches.
