gas - freon 125
It has been successfully used to protect many objects on the territory of Russia for many years. This is due to a number of advantages of this gas. It has a certain amount of biosecurity.
The fire extinguishing concentration of HFC 125 is 9.8%. In accordance with the NFPA 2001 standard, the maximum residence time of a person in the conditions of using Freon 125 at concentrations from 9 to 11.5% is up to 5 minutes.
It should be noted that safety for people in a gas-fired fuel tank is ensured by the gas release algorithm. Gas is released into the protected volume only in the absence of people. When a fire is detected, a sound and light warning system is activated and people are evacuated. Delay of gas release is provided for the time required for personnel evacuation. After people leave the room, the specialist manually turns on the automatic fire extinguishing installation. That is, the gas release algorithm excludes the presence of people in the room.
In addition, HFC 125 has the following properties: it has a high fire extinguishing efficiency, does not deplete the ozone layer and has a good quality / price ratio; therefore, this gas is often used in installations for many facilities.
The gas is quickly released into the room, while the percentage of oxygen in the room is reduced to 19%. But this is enough to ensure free breathing of a person. This makes it possible to exclude a person from receiving serious damage to health.