Carbon dioxide fire extinguisher OU-7 Yarpozinvest OOU-7Y

Carbon dioxide fire extinguisher (CO2) is a high-pressure refillable extinguisher with a charge of liquid carbon dioxide (according to GOST 8050-85) under pressure of saturated vapors. CO2 operation is based on the displacement of the carbon dioxide charge under the action of its own excess pressure created during the filling of the extinguisher. Carbon dioxide is in the cylinder under a pressure of 5.7 MPa (60 kgf/cm2) at an ambient temperature of +20°C. The maximum working pressure in the cylinder at a temperature of +50°C must not exceed 14.7 MPa (150 kgf/cm2). The extinguishing action of carbon dioxide is based on cooling the combustion zone and diluting the flammable air-vapor medium with an inert (non-flammable) substance to concentrations at which the combustion reaction ceases. Carbon dioxide fire extinguishers are intended for extinguishing various substances whose combustion cannot occur without access to oxygen, fires on electrified railway and urban transport, electrical installations under voltage up to 10,000 V, fires in museums, art galleries, and archives, widely used in office premises with office equipment, as well as in the residential sector. The main advantage of carbon dioxide fire extinguishers is that carbon dioxide does not damage the object being extinguished and leaves no traces.