These systems also known as clean agent systems are widely used where the environment needs no
tedious cleaning after the extinguishment of fire like computer rooms, control rooms, record rooms,
libraries, electrical hazards such as switchgear rooms, substations, battery rooms etc.
Carbon dioxide systems are generally used for unmanned areas since it could be lethal for human beings though it
is economical & one of the best agent for extinguishing the fire. Low pressure CO2 systems (360 psi) are used
where the quantity of the gas required is high as it is available with tanks from 1 ton to 10 tons& comes with
its own refrigeration unit to store CO2 in its liquid form.
High pressure CO2 systems (850 psi) are used where the quantity of gas required is small as they are
available in standard bottles of 60, 80 & 120 lbs. capacity wherein the gas is stored under high pressure at
normal ambient temperature.
Clean Agent Fire Extinguishing System
FM200, Novec 1230 gases are mostly used as clean agent fire gas suppressionants.
Clean Agent Fire Suppression Systems are designed as per NFPA 2001.
In case of FM200 ( HFC227ea) the design concentration to suppress the fire is 6 % to 8.9% by volume.
And in Novec 1230 the design concentration required to suppress the fire ranges from
4% to 5.5% by volume.
On activation of smoke detector, the fire alarm gives signal to the solenoid valve of the master
cylinder to activate. Hence opening the salve valves on the other cylinders and discharging the
liquid gas through manifold, directional valve, pipes and output through nozzles. Hence Total
Flooding of the gas in the room is achieved.