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LIZ-030 March 8, 2018 Rev12
9
4.2 USE WITH FOAM
Refer to fi re service training for the proper use of foam.
WARNING
For Class B fi res, lack of foam or interruption in the foam stream can cause a break in the foam
blanket and greatly increase the risk of injury or death.
Assure that:
• Application rate is suffi
cient (see NFPA 11 or foam manufacturer’s recommendations)
• Enough concentrate is on hand to complete task (see NFPA for minimum duration time
requirements)
• Foam logistics have been carefully planned.
Allow for such things as:
• Storage of foam in a location not exposed to the hazard it protects
• Personnel, equipment, and technique to deliver foam at a rapid enough rate
• Removal of empty foam containers
• Clear path to deliver foam, as hoses and other equipment and vehicles are deployed
WARNING
Improper use of foam can result in injury or damage to the environment. Follow foam
manufacturer’s instructions and fi re service training to avoid:
• Using wrong type of foam on a fi re, i.e. Class A foam on a Class B fi re.
• Mishandling of concentrates, some of which are fl ammable.
• Plunging foam into pools of burning liquid fuels.
• Causing environmental damage.
• Directing stream at personnel.
WARNING
There are a wide variety of foam concentrates. Each user is responsible for verifying that any
foam concentrate chosen is suitable for the purpose intended.
4.0 FLOW CHARACTERISTICS
4.1 FIXED FLOW
Figure 4.1 gives the fl ow characteristics of the MASTER FOAM nozzle. Pressure on the graph is the nozzle inlet pressure. Losses
through piping and monitor must be taken into account to deliver the desired pressure to the nozzle. Flow on the graph is the water
fl ow entering the nozzle. Any foam educted adds to this fl ow.
0
50
100
150
200
0
200
400
600
800
1000
1200
175
125
75
25
100
500
700
900
1100
300
1300
5000
0
500
1000
1500
2000
2500
3000
3500
4000
4500
FLOW (gpm)
OPERATING RANGE:
150 psi (10.3 bar)MAXIMUM
50 psi (3.4 bar)MINIMUM
PRESSURE (psi)
BURST PRESSURE
1000 psi (68.9 bar)
FLOW (l/min)
1400
1600
1800
2000
2200
1500
1700
1900
2100
2300
9000
5500
6000
6500
7000
7500
8000
8500
0
5
10
3
7
6
8
9
4
2
1
11
12
13
PRESSURE (bar)
1000 GPM
750 GPM
1250 GPM
500 GPM
350 GPM
250 GPM
1500 GPM
2000 GPM
Fig 4.1 MASTER FOAM Flows
CAUTION
An inadequate supply of nozzle pressure and/or fl ow will cause an ineff ective stream and can
result in injury, death or loss of property. See fl ow graph or call 800-348-2686 for assistance.