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Hydrofoam equipment include:
- Hydrofoam nozzle
- Inline foam eductor
When applying foam, it is desirable to utilize a high-quality foam stream. At least __% of the stream flow should land on the flammable liquid within a well-defined,
compact, elliptical area or footprint.
An efficient foam-making device will throw foam
____ ___ ___ as water.
Nearly as far
The ___-_____Hydro-Foam design entrains less air into the foam solution. This produces a high quality foam that expands to the optimum Class "B" foam range, from __ to __.
Non-aspiring, 3:1 to 6:1
The hydrofoam nozzle is based on an efficient,
____-___, ____-____, ___-_____ design.
Water-hydraulic, self-educting, non-aspirating
Hydrofoam nozzle has several distinct
- 1. is a water-hydraulic delivery device that is simple and reliable because it does not have any moving parts.
- 2. efficient self-proportioning design allows the full energy of the available water-
- power to be used to produce a foam stream with greater range.
- 3. operate effectively at low nozzle pressures (75psi or less)
- 4. Large quantities of foam concentrate can be located remote from the nozzle and
- transported to the nozzle using small diameter hose lines (11/2") utilizing a special
- venturi-type device (Jet Ratio Controller).
Stream Range (straight stream)
Water Inlet Size
- 100 psi
- 660 GPM
- 21/2" NST (National Standard Thread)
The Hydro-Foam nozzle is fully adjustable from ___ ____ to ____ ____.
Straight stream to full fog
The foam concentrate inlet on the Hydro-Foam nozzle includes an _' reinforced clear
plastic "pigtail" with 11/2" NST swivel inlet for connection to the _____ and a 11/2"
NPT swivel for connection to the _____.
8', Fire hose, nozzle
11/2 __ psi per 100'
ladderpipe assembly __psi
- JRC- 50psi
- 11/2 -35psi
- ladderpipe -40psi
Expect to use __ gallons of
concentrate per minute of operation while water is flowing. (Hydrofoam nozzle)
The 11/2" In-line Foam Eductor is a ______ delivery device that is simple and reliable because it has few moving parts.
Positive metering allows foam mixtures ranging from __% to _%. (Inline educator)
.5% to 6%
Pump ___PSI to the inline eductor
Use __% for normal Class “B" flammable liquids. Use __% for polar solvents. Push the knurled "mixture" knob in and rotate. Line the knob setting (i.e. 3%) to the white line on the body of the pick-up tube housing. (Inline educator)
As air is entrained in the solution nozzle pressure and nozzle reaction will ___. (Inline educator)
Direct water stream ___ ___ ____until foam reaches the nozzle. (Inline educator)
Away from the fire
You can stop the flow of foam (inline educator) by removing the pick-up tube from the container of concentrate or rotating the mixture selector knob to the _ position.
Throttle back pump pressure __% before changing from "foam" to "water" (in-line educator).