What is DSPA
DSPA stands for Dry Sprinkler Powder Aerosol. It is a system consists of a solid aerosol forming compound in a non-pressurized red canister which aerosolizes finely divided solid particles: the aerosol fire extinguishing agent. The aerosol is self-generated by a combustion process of the solid aerosol-forming compound, activated by an activation device (also known as the starter).
Unlike many other extinguishing agents, DSPA Aerosol interferes with the chain reaction in the fire, leaving oxygen levels intact.
“Fire propagation” radicals (OH, H, and O) are essential elements to the chain reaction of the fire. DSPA Aerosol suppresses the fire (primarily) by chemical interference with these free radicals within the fire zone, thus interrupting the on-going chain reaction of the fire.
DSPA Aerosol is an extinguishing medium of finely divided solid particles, mainly potassium particles, with a typically diameter of approx.. 2 microns. When introduced into the flaming region of a fire, the aerosol reacts with the fire radicals produced during combustion (hydrogen, oxygen, and hydroxyls) resulting in extinguishment of the fire. The small aerosol particles provide a large surface area for capturing these radicals making them effective extinguishing agents.
