Elkhart Brass TFLX-20 - Manual (Page 6)

6
Warning:
The reaction force of this nozzle is dependent on the pressure and flow that is supplied to the nozzle
as well the selected nozzle diameter. Using this nozzle for water only will result in significantly higher
reaction forces than with CAF. Nozzle reaction must be considered when using the larger settings in
water only. Elevated nozzle pressure may create an unsafe reaction force for the user. The nozzle
reaction formula for water is as follows:
NR = 1.5*d
2
*NP
NR = Nozzle Reaction (Pounds)
D = Nozzle Diameter (Inches)
NP = Nozzle Pressure (psi)
*Formula only valid for water application.
D. Wet CAF – 1 1/8 Inch – 29 mm Setting
The Wet CAF/ 1 1/8 inch setting on the Flex Attack
®
tip has been designed to enable the user to
apply a wet solution of CAF. The discharge size of the nozzle in this setting is 1-1/8”. The CAF
flow characteristics of the nozzle in this setting will depend upon pump panel settings, but will
exhibit the similar characteristics to a 1-1/8” smooth bore tip. Each department should thoroughly
test the nozzle to determine the characteristics based on their foam system. If using water only
the flow rate at 50 psi is 265 gpm and the nozzle reaction is 95 pounds.
E. Dry CAF – 1 3/8 Inch – 35 mm Setting
The Dry CAF setting on the Flex Attack
®
has been designed to enable the user to apply a dry
solution of CAF. This application is generally used for exposure protection. It should be noted that
a wet solution of CAF can be flowed through the nozzle in this setting. The discharge size of the
nozzle in this setting is 1-3/8”. The CAF flow characteristics of the nozzle in this setting will
depend on pump panel setting, but will exhibit similar characteristics to a 1-3/8” smooth bore tip.
Each department should thoroughly test the nozzle to determine the characteristics based on their
foam system. If flowing water only the flow rate at 50 psi is 396 gpm and nozzle reaction is 142
pounds.