Nozzles fire streams foam

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Anonymous
ID:
205682
Filename:
Nozzles fire streams foam
Updated:
2013-03-07 12:38:41
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Nozzles fire streams foam
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Nozzles fire streams foam
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  1. Maximum vertical and Horizontal reach
    Vertical-65 to 70 Horizontal-32 degrees
  2. Nozzle reaction
    The force of nature that makes the nozzle move in the opposite direction of water flow
  3. Constant or Set Volume Nozzle
    Has one set volume at a set pressure, for example, 60 gpm at 100 psi
  4. Automatic or constant pressure nozzle
    has a flow that is adjusted by the pump operator
  5. Special-purpose nozzles
    Nozzles like the cellar nozzle or Bresnan distributors or piercing nozzles that are used for limited types of situations
  6. Small diameter handlines
    Typically 1.5, 1.75, or 2 inches in diameter.
  7. Medium-diameter handlines
    2.5 or 3 inches hose
  8. Direct attack
    Flow of water directly at the seat of the fire
  9. Indirect attack
    Applying fog stream into closed room or compartment
  10. Water to steam conversion at 212 F
    1600-1700x
  11. At 1,000 F
    Over 4,000x
  12. Combination attack
    Blend of direct and indirect attack with circular, z, or T motion
  13. Class B foam
    aggregate of gas-filled bubbles formed from aqueous solutions of specially formulated concentrated liquid foaming agents
  14. Class A foam
    aggregate of gas-filled bubbles formed from aqueous solutions of detergent or soap based surfactants used to penetrate ordinary combustible materials.
  15. Application rate of foam
    the amount of foam or foam solution needed to suppress a fire in gallons per minute per square foot
  16. Protein foam
    Made from chemically broken down natural protein materials, such as animal blood, that have metallic salts added for foaming
  17. Fluoroprotein foam
    protein foam with a fluorinated surfactant added
  18. AFFF
    • Aqueous film forming foam made from fluorochemical surfactants and synthetic foaming agents.
    • Creates a liquid that forms a film that spreads quickly over the surface of the flammable liquid.
  19. Alcohol-resistant foams
    Contain a polymer that forms a protective layer between the burning surface and the foam, preventing the foam breakdown by alcohols present in the burning fuel.
  20. FFFP
    Combines protein with the film forming fluorosurfactants of AFFF to improve qualities of both types.
  21. Detergent-type foams
    Use synthetic surfactants to break down the surface tension of water and create a foaming blanket. Good on Class A materials.
  22. Hydrocarbons
    Wide range of substances in forms ranging from gaseous to liquid to semisolid to solid.
  23. Miscible
    Water soluble.
  24. Fact
    An eductor works with the Venturi principle.
  25. CAFS
    dual injection systems, the concentrate is in a separate foam tank and foam pump pumps the concentrate directly into the hoseline.
  26. Banks in technique of foam
    Strikes before fire and rolls onto it
  27. Bank-back technique of foam
    Banks off wall and rolls back into the fire
  28. Rain down technique of foam application
    Foam is sprayed high into the air over the fire and floats down onto it

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