Quick Reference Values
extinguishing mediumHalon 1211 (Bromochlorodifluoromethane)
minimum discharge time8 to 15 seconds depending on capacity
hydrostatic test pressure2.5 to 3.5 MPa
operating temperature range-20°C to +55°C
Practical Notes
Halon 1211 is an ozone-depleting substance governed by the Montreal Protocol; its use is strictly limited to critical applications like aviation where approved clean-agent drop-in replacements are still evolving.
Since Halon 1211 is stored as a liquefied gas, routine maintenance relies heavily on precise weighing rather than just pressure gauge readings to detect leakage.
Extinguishers used in aircraft must withstand significant pressure variations and vibration, requiring rigorous adherence to the standard's construction and testing clauses.