The fire extinguishing agent inside the cylinder of automatic dry powder fire extinguisher is DCP. This type of fire extinguisher is useful for extinguishing the fire of classes A, B, and C. The propellant inside that automatic dcp fire extinguisher is nitrogen, which is an inert gas.
Dry powder covers the fire and the nitrogen also suffocates the fire. In this way the supply for oxygen stops and the fire gets extinguished.Both the agent and the propellant also produce cooling effect due to which the fire does not starts again.
