INERT GAS SYSTEMS

DI.MARCA produces all kinds of inert gas fire prevention systems at 200 and 300 bar. DI. MARCA offers Argon, IG55 IG100 and IG541 systems. Argonite and CO2 are the main gases used for the systems that act on the fire by decreasing the percentage of oxygen. See the attached documents below for more information.

ARGONITE

Argonite

Argonite uses argon as the extinguishing agent, which acts on the fire by decreasing the percentage of oxygen from 20.9% to below 15%, the threshold below which the fire theoretically goes out. The total flooding principle is the one used. Argonite is designed primarily to extinguish:

  • Hazards inherent in electrical and electronic systems
  • For the protection of spaces in subfloors and ceilings
  • Hazards inherent in flammable liquids, gases and fuels
  • Real estate of high value (museums, libraries)

In rooms with expensive tools and equipment (CED, control rooms, etc.). Argonite is 100% ecological. ARGONITE has zero environmental impact and reduces the percentage of oxygen to 12%, thus guaranteeing the fire is extinguished and allowing the presence of people in the room. The argon required for the extinguishing action is contained in special tanks of an approved type TPED of 80/140 litres, in which the gas is pressurised to 200/300 bar. The pipes for transporting and dispensing argon IG 01 are constructed using galvanised steel API 5LX Schedule 40, complete with ASA Series 3000 fittings downstream of the pressure reducer, while for the upstream manifolds, Schedule 160 / XXS piping is used. The discharge nozzles are radial type, suitably perforated using the VDS approved hydraulic calculation and they allow a uniform propagation of gas into the environment with the required design concentration. The excess pressure that may form in the protected area after discharge of the extinguishing agent is attenuated with the use of one or more pressure relief dampers, equipped with pre-calibrated springs, which allow the evacuation of excess pressure. Legislation provides for the FAN DOOR TEST as a test measurement of losses, to verify the physical characteristics of the rooms to be protected and properly develop the plan. The automatic implementation is carried out using the smoke detection system. It is activated electronically by pressing a discharge button at the entrance of the protected space or directly on the control unit or manually by pressing the control on the cylinder.

CO2

CO2

CO2 is normally colourless, odourless and when discharged it takes on the appearance of a white vapour; it does not corrode; It does not damage any material and does not wet.

Carbon dioxide, unlike air, does not contain a quantity of oxygen sufficient to feed combustion; it vaporises quickly without residues of any kind, causing a sharp drop in temperature, a factor that greatly increases the extinguishing effect of CO2.

Humans can not breathe in an environment saturated with CO2, and therefore must take precautions before entering an environment where this gas was discharged in large quantities.

The fire extinguishing system employs carbon dioxide in the liquid state as the extinguishing agent, stored in cylinders at a pressure of about 55 bar at 15°.

The fire alarm system provides fully automatic operation through the electrical command and control panel and the appropriate controls and automatic valves and causes the discharge of the extinguishing agent.

In addition to automatic operation, the system can also be operated by manual mechanical activation.

The system design and the quantities of CO2 are calculated appropriately ensuring an extinguishing operation according to NFPA 12

The DI.MARCA CO2 systems are the total flooding type and "local application" type used to protect against specific hazards

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