DRY CHEMICAL POWDER (DCP) Type Fire Extinguisher . Capacity ISI Mark IS: 15683 operating temperature (0) ºC to (+55) ºC for Class 4A type of fire complete with Squeeze type lever, Hose, filled with ISI Mark Powder IS: 4308 Complete in all respect & ‘B’ & ‘C’ class fires – inflammable liquids, gaseous fires like L.P.G. and acetylene, and electrical fires.