Overview Of Department Foam Systems Flashcards
What are the two types of class B foams used in FFX?
National Universal Plus 3-6% AR-AFFF
Williams Thunderstorm ATC 1-3% AR-AFFF
What type of class B Foam is used by All E-One and Volunteer owned apparatus?
Universal Plus 3-6%
What brand of class B foam is used in all Pierce Engines?
Williams Thunderstorm 1-3%
What Nozzle has become the standard foam application device for foam application using the E-One Feecon foam system?
The fog nozzle. While this is acceptable for the E-one, it is not compatible with other foam induction systems.
What is imperative when choosing a nozzle for a Venturi style proportioning system?
The nozzle flow must match the flow of the educator.
Because modern foams require less energy to produce a finished foam, making it is possible to achieve what two styles of nozzles?
Air aspirating and non-air aspirating.
All foams in FFX are AR-AFFF. What does AR-AFFF stand for?
Alcohol resistant aqueous film forming foam
What properties are a characteristic of a AR-AFFF?
Good knock down ability, heat resistance, fuel tolerance, vapor suppression and alcohol resistance
What chemicals typically comprise class B foams?
Class B foam is typically compromised special flaurochemical and hydrocarbon surfactants, hi molecular weight polymers, and solvents
What three fire extinguishing mechanisms does class B foam use?
- An aqueous film is formed on a conventional hydrocarbon fuel, or a polymeric membrane is formed on a polar solvent fuel. This film or membrane forms a barrier to help prevent the release of fuel vapors
- A blanket is formed that excludes oxygen and drains the liquids forming the films.
- The water content cools
What type of foam system is used in the E-one reserve fleet?
Feecon around the pump system. They feature:
Variable flows gpm
Variable discharge pressures
No back pressure restriction
Not affected by hose length or elevation
No nozzle restriction
What nozzles can be used with the E1 reserve fleet to flow foam?
Akron assault nozzle and JS10 air aspirating nozzle.
- operator should calculate and pump the hand lines and nozzles at the appropriate pressure and flow rate for the selected nozzle.
What type of foam system is used in pre-2012 Pierce engines?
The pierce engine has an Akron 95 GPM truck foam system. This is a single discharge inline in doctor delivery system dedicated to the front bumper line.
When using a pre-2012 pierce engine with an Akron 95 GPM foam system, what is the required psi and max hose lay for 1% and 3% foam concentrations?
The educator is suppled at 200 psi with a max hose lay of 350’ at 1% and 250’ at 3%.
When using a pre-2012 pierce engine with an Akron 95 GPM foam system, what nozzle should be used?
Foam application with this system should be accomplished by utilizing a JS 10 air aspirating foam nozzle with the Akron bail/shut off. 
What foam system is used in the newest pierce engines?
The newest pierce engines will have the husky 3 foam delivery system. This is an injection style system where foam concentrate is added at the discharge and will also be dedicated to the front bumper line.
What is the Flow capability of the Husky three foam system and the newest Pierce engines?
This foam system is capable of 300 GPM at 1% foam application and 100 GPM at 3% foam application.
When using the newest pierce engines with the Husky 3 foam system, what nozzles are compatible for use?
Both the Akron assault nozzle and JS 10 are compatible with the system, however application percentage should be taken into consideration when selecting your nozzle for foam operations.
300 gpm @ 1% = Akron assault
100 gpm @ 3% = JS-10
What type of Portable in-line educators does Fairfax use for every engine company?
National foam HLP-9M. The style inductor must be positioned to receive 200 PSI inlet pressure with a max hose lay of 200 feet on the outlet side of the reductor regardless of foam concentration.
What nozzle should be used when operating with the portable in line eductor?
The JS 10 air aspirating foam nozzle with the Akron bail/shut off
What foam systems are equipped on the CAFS engines?
Husky 12 – Hercules foam system. This is an ejection style foam system where foam concentrate is added at the discharge.
What is the flow capability when using class B foam in a CAFS engine?
The Husky 12 foam system is capable of 1000 GPM at 1% and 400 GPM at 3% class B foam
What nozzles should be utilized to flow form from a CAFS engine?
Both the Akron assault nozzle and JS 10 nozzles are compatible with the system
What four engines currently contain class a foam and are also equipped with compressed air foam systems?
412, 416, 420 and 441
What type of class A foam does Fairfax utilize?
Ansul Silv-ex Plus foam. This is a low, medium, and high expansion foam formulated from specialty hydrocarbon surfactance, stabilizers, corrosion inhibitors and solvents. It is proportioned between 0.1 to 1.0%
What fire extinguishing mechanisms are in effect when using class A foam?
Reduction of surface tension for increased wedding and penetration characteristics for deep-seated class and fires.
Extended drain time providing longer surface wetting and reduced risk of reignition.
A foam blanket which provides an insulating barrier between the fuel and air, reflects heat, and cools the fuel.
How is a class A foam solution applied (what nozzle, concentration rate)?
This application produces a milky form solution without aeration. It is supplied at a rate of 0.3% - 0.5%. The Akron assault nozzle is compatible for this application.
How is class A foam mixed with both air and water when utilized for a CAFS fire attack?
This application consists of 2/3 water and 1/3 air with a class a foam application rate of 0.3%. The appearance should be sudsy and milky. The Akron assault smoothbore option is compatible with this application.
* a fog nozzle would break down the bubble production. 
How is class A foam utilized in CAFS for overhaul and exposure protection? 
This application consists of 2/3 air and 1/3 water with a class a foam application rate of 0.5%. The finished product will be fluffy and sticky. The Akron a salt gated but with smooth bore slug removed is the best nozzle for this application.
Recommended practices for foam systems:
