The technical deployment and maintenance of a Foam Fire Extinguisher (AFFF - Aqueous Film Forming Foam). This medium is designed to extinguish fires through a smothering effect, creating a physical barrier between the fuel surface and the oxygen.
Fire Classifications & Hazard Warnings
Class A: Effective on solid combustibles (wood, paper, textiles) by cooling and penetrating the fibers.
Class B: Highly effective on flammable liquids; the foam film floats on the liquid surface to suppress vapors.
CRITICAL WARNING: This unit is water-based. Do NOT use on electrical fires, as the foam is conductive and poses a severe electrocution risk.
Operational Procedure (PASS)
Deployment utilizes the standard PASS method, with a focus on surface coverage:
Pull: Remove the safety pin to unlock the trigger mechanism.
Aim: Direct the nozzle at the base of the fire.
Squeeze: Press the handle to discharge the AFFF agent.
Sweep: Apply gently to cover the entire surface area, allowing the foam blanket to settle and suppress the flames.
Maintenance Protocols
To ensure operational readiness, personnel must check foam levels regularly and inspect the nozzle for any crystalline blockages or debris. The cylinder must be stored upright to maintain internal pressure balance. Mandatory annual refills and inspections are required to ensure the chemical stability of the AFFF