When the gas fire extinguishing system is started, it will spray a large amount of fire extinguishing gas into the protective area, and the air pressure in the protective area will rise instantly. In addition, the heat generated by the fire will also increase the indoor air pressure. The larger, the longer the time, the greater the value of the increase in air pressure. Therefore, the "Code" requires that the allowable pressure (the difference between the internal and external pressure) of the protected area envelope structure (including doors and windows) to withstand the internal pressure should not be lower than 1200Pa; Its function is that on the one hand, when the pressure in the protective area rises to a certain value due to the extinguishing agent discharge pressure, part of the air and the fire extinguishing agent are released to the outside of the protective area in time through the pressure relief port to ensure the safety of the protective structure of the protective area; On the other hand, to prevent fire failure due to the explosion of doors and windows caused by the pressure rise when the fire extinguishing agent is sprayed in the protective area, the fire spreads out of control; the setting height: because heptafluoropropane, carbon dioxide, trifluoromethane, and hexafluoropropane are heavier than air, in order to reduce The extinguishing agent is drained from the pressure relief port. The "Code" stipulates that the pressure relief port of the above-mentioned gas fire extinguishing system should be opened at more than 2/3 of the clear height of the protection zone, that is, the height of the lower edge of the pressure relief port should not be lower than 2 / 3.
表示必填 采购：泄压口* Denotes requiredpurchase: pressure relief port