PERCENT
FOAM USED FOR CALIBRATION
0.5% and 1%
Class A foam of 20 centipoise viscosity
3%
3M ATC 3 AR-AFFF product code ATC-603
6%
3M ATC-AFFF product code FC-600F
Fig 2.5.2b Proportioning Accuracy With Pressure Variation
0
1
2
3
4
5
6
7
8
40
60
80
100
120
140
160
NOZZLE INLET PRESSURE (PSI)
FOAM
PERCENT
AGE
(%)
NOMINAL 0.5%
AT 100 PSI
NOMINAL 1%
AT 100 PSI
NOMINAL 3%
AT 100 PSI
NOMINAL 6%
AT 100 PSI
Note:
In any eductor type system the accuracy of proportioning depends on the viscosity of the foam
concentrate. The orifice plates for the
nozzle have been calibrated at 70 degrees F as follows:
MASTER FOAM
2.5.3 CONCENTRATE HOSE CONNECTION
The concentrate hose is attached to the
nozzle by a 1.5 inch cam lock fitting (Military
Standard: MS 27019). Orient levers to avoid interference with the stream shaper and push the fitting onto the
concentrate inlet on the nozzle. Fold both levers until they touch the hose to lock. The other end of the hose is fed
into a foam container. An optional hose is available with female camlock fittings on each end. Hose connection
and typical set ups are shown in figure 2.5.3a and 2.5.3b.
MASTER FOAM
7
TASK FORCE TIPS 800.348.2686 www.tft.com
