HFC-277ea is a chemical gas comprises of Hydrogen, Fluorine& Carbon. A commonly known brand is FM200.
General Information on HFC-277ea (FM200):
How HFC-277ea (FM200) extinguishes a fire is through bringing down the temperature, so that the combustion reaction is unable to sustain itself.
HFC-277ea (FM200) is only suitable for total flooding applications where the protected area has the structural integrity to contain the chemical gas that has been discharged.
Although HFC-277ea (FM200) has a Zero Ozone Depletion Potential (ODP), it however has a Global Warming Potential of approximately 3800.
Upon discharge of HFC-277ea (FM200), a decrease in visibility in the protected room will occur as the chemical agent is stored in the form of liquid. Mist will therefore be generated when vaporisation occurs, causing condensation in the air.
Also, it is highly recommended that exposure to HFC-277ea (FM200) during its discharge should be kept to a minimum as Hydrogen Fluoride (HF), a by-product from the chemical reaction of halocarbon gas with heat will cause irritation to a body’s tissue surfaces, and prolonged exposure with increasing concentrations could even prove to be lethal in the absence of medical intervention.
How it works:
Similar to NN100, HFC-277ea (FM200) is activated after two stages of fire protection field devices activation.
First stage activation of HFC-277ea (FM200) system:
When the first smoke detector is triggered, the alarm bell situated in the protected room will begin to ring.
The “Evacuate Area Immediately” signage situated inside the protected room will start to flash.
Second stage activation of HFC-277ea (FM200) system:
Horn and strobe light situated inside the protected room will being to sound and flash respectively.
Upon the pre-determined 30 seconds countdown delay, HFC-277ea (FM200) will be discharged.
“Gas Discharged” signage situated outside protected room will begin to flash.
Although HFC-277ea (FM200) is used in Singapore, it is banned in certain Scandinavian countries like Switzerland, Sweden, Denmark and Iceland. For an alternative to HFC-277ea (FM200) gas suppression system, another reliable gas suppression system will be NN100.