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Foam & Nozzles. Class A Foam Training Available. Awareness and Operations Training In-Depth Education Current Applications Attack Strategies Proportioning Tools Application Devices Training Aspects Environmental Concerns. Foam Terminology. Foam Concentrate

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class a foam training available
Class A Foam Training Available...
  • Awareness and Operations Training
  • In-Depth Education
  • Current Applications
  • Attack Strategies
  • Proportioning Tools
  • Application Devices
  • Training Aspects
  • Environmental Concerns
foam terminology
Foam Terminology
  • Foam Concentrate

As purchased from the manufacturer.

Must be proportioned in water.

  • Foam Solution

Foam concentrate proportioned with water

Prior to the addition of air and mechanical agitation.

  • Finished Foam

Foam solution after air and mechanical agitation is added.

Quantity will vary, dependent upon how much air is added.

Quality will be dependent on type of concentrate used, and type of aspiration method used.

basic foam making
Basic Foam Making

Foam Concentrate

+ Water

+ Air

+ Mechanical Agitation

= FOAM

6 foam solution class b

6%

6 gallons

6% foam

concentrate

+

94 gallons water

= 100 gallons 6% foam solution

6% Foam Solution (Class B)
3 foam solution class b

3 gallons

3% foam

concentrate

+

97 gallons water

= 100 gallons 3% foam solution

3% Foam Solution (Class B)

3%

0 5 foam solution class a

0.5 gallons

0.1% - 1% foam

concentrate

+

99.5 gallons water

= 100 gallons 0.5% foam solution

0.5% Foam Solution (Class A)

0.1-1%

foam concentrates
Foam Concentrates...
  • Class A

For Class A Combustibles

0.1% - 1.0%

  • AFFF(Aqueous Film Forming Foam)

For Class B Hydrocarbon Flammables

1% ; 3%; 6%

  • AR-AFFF (Alcohol Resistant - Aqueous Film Forming Foam)

For Class B Hydrocarbon & Polar Solvent Flammables

(1% x 3%) (3% x 3%) (3% x 6%)

foam concentrates9
Foam Concentrates...
  • Protein

For Class B Hydrocarbon Flammables

3%; 6%

  • Fluoroprotein

For Class B Hydrocarbon Flammables

3%; 6%

  • FFFP (Film Forming Fluoroprotein)

For Class B Hydrocarbon Flammables

3%; 6%

foam concentrates10
Foam Concentrates...
  • Syndet - High Expansion

For Quickly FillingEnclosed Areas

For LNG Suppression (Liquefied Natural Gas)

  • HazMat Foam

Vapor Suppression for Fuming Chemicals

for all foam concentrates
For AllFoam Concentrates...
  • Determine what fuel/hazard is involved
  • Use appropriate concentrate for the hazard
  • Read manufacturer’s recommendations for proper use
  • Refer to MSDS sheet for safety information
  • Understand the environmental concerns
  • Pre-plan with waste-water treatment facilities
  • Refer to NFPA 11 guidelines for application rates
batch mixing
Batch Mixing
  • Simple
  • Economical
  • Apparatus Water Tank
  • Portable Tank
  • Foam at All Discharges
  • Not Easily Adjusted
  • Increased Maintenance of Pumps, Tanks, Valves
around the pump proportioner
Around the Pump Proportioner
  • Higher Flows
  • Foam to All Discharges
  • Normal Pump Pressures
  • Higher Cost
  • Operator Must Know Flow
  • Inlet Pressure Limitations
  • Typically Installed by Manufacturer
  • Increased Maintenance of Pumps, Tanks, Valves
discharge side proportioner
Discharge Side Proportioner
  • No Foam in Pump or Water Tank
  • Automatic Systems Available
  • Increased Accuracy for Class A Foams
  • Dual Agent Capabilities
  • Simpler Operation
  • Normal Pump Pressures
  • Works with Most Nozzles
  • Higher Initial Cost
inline or bypass eductor
Inline or Bypass Eductor
  • Simple Design
  • Few Moving Parts
  • Most Common
  • Relatively Economical
  • Nozzle Limitations
  • Pressure Minimums
  • Hose Line Limitations
operational considerations foam eductor

200 psi Inlet Pressure

- 70 psi Eductor Loss

130 psi Outlet Pressure

-100 psi Nozzle Pressure

30psi Hoseline Friction Loss Allowance

Operational Considerations Foam Eductor

200 psi Inlet Pressure

70 psi Eductor Loss

130 psi Outlet Pressure

100 psi Nozzle Pressure (typical)

Clean Metering Valve & Check Ball after EVERY use.

maximum hose length on eductor outlet
Maximum Hose Length on Eductor Outlet
  • Shown for 100 psi nozzle.
  • Lower nozzle pressure = Increased maximum length
  • May vary depending on eductor, hose and nozzle
using foam eductors
Using Foam Eductors...
  • Follow eductor manufacturer’s recommendations for pump pressure, hose size and hose length
  • Nozzle flow rating must match eductor flow rating
  • Automatic nozzle will adjust itself to eductor flow rating
  • Nozzle must be fully open
  • Avoid kinking of hose line
  • Mix ratio setting on eductor must match that of the foam concentrate being used
  • Elevation loss must be calculated, if nozzle is elevated
  • Check for plugged or damaged pick up tube on eductor
foam expansion methods
Foam Expansion Methods

Without Foam Attachments

Low Expansion

Typical Expansion 4 - 8 to 1

foam expansion methods21
Foam Expansion Methods

With Foam Attachments

Low Expansion

Typical Expansion 8 - 10 to 1

Medium Expansion

Typical Expansion 20+ to 1

foam capable
Foam Capable?

“Our department has an eductor, foam nozzle, and 15 gallons of foam on the truck, so we can handle liquid fires, too.

...Or can we?”

Let’s look at the facts...

nfpa 11 for ignited spills of shallow depth
NFPA # 11For ignited spills of shallow depth

Hydrocarbon fuels:

  • Rule of thumb: Eductor flow rate x 10 = sq. ft. of ignited hydrocarbon spill area

Example: 95 GPM x 10 = 950 ft2

  • 0.1 GPM foam solution /ft2 (AFFF or FFFP)
  • 15 minutes of continuous foam application

95 GPM Eductor

42.75 gals. of 3% Foam Concentrate

1382.25 gals. of Water

1425 gals. of Foam Solution

nfpa 11 for ignited spills of shallow depth24
NFPA # 11For ignited spills of shallow depth

Polar Solvent (alcohol type) fuels:

  • Rule of thumb: Eductor flow rate x 5 = sq. ft. of ignited polar solvent spill area

Example: 95 GPM x 5 = 475 ft2

  • 0.2 GPM foam solution /ft2
  • 15 minutes of continuous foam application

95 GPM Eductor

85.5 gals. of 6% AR Foam Concentrate

1339.5 gals. of Water

1425 gals. of Foam Solution

master foam streams
Master Foam Streams

Foam Concentrate Usage