Powder fire extinguishing agent is dry and easy-flowing fine powders, by having a fire-extinguishing performance of the inorganic salt and small amounts of additives by drying, crushing, mixing of fine solid powder. It is widely used in fire extinguishing agent. In addition to the metallic fire fighting the dedicated dry chemical extinguishing agent, dry powder extinguishing agent is generally divided into two categories of BC powder and ABC powder; the domestic fire companies developed a fine dry powder extinguishing agent, due to the small particle size, class gas released into the space in the core technology, some fire companies developed the ultrafine powder series automatic fire extinguishing products, broaden and enhance the range of applications, and the technical content of the dry powder extinguishing products. Powder extinguishing agent through the the pink mist sprayed with pressurized gas under flame contact, mixing occurs when the physical and chemical effects extinguishing. Further, there is some dilution of oxygen and cooling effect. Automatic fire extinguishing equipment (fire extinguisher) cylinder, pressure gauge, nozzles and other parts, extinguishing agent filling by pressure spray fire extinguishing equipment. Powder automatic fire extinguishing devices and types of fire extinguishers to many, because of the wide range of dry powder fire extinguishing devices, fire engineering company where the author used a variety of dry powder fire extinguishing devices, and accumulated some experience in the design of automatic fire engineering, especially in this specifically on how to choose dry powder automatic fire extinguishing device as an introduction for peer reference. Best fire extinguisher maintenance company - Shenzhen Yuantong Fire valve 【Shenzhen fire extinguishers, fire extinguisher maintenance, Shenzhen, fire equipment, fire signs, fire engineering in Shenzhen, Shenzhen transport equipment, fire safety, exit lights, Shenzhen hydrant http://www. szytxffm.net] classification fire with dry powder fire extinguishing devices to figure out how a basic truth of the first to find out the classification of the fire. In accordance with the provisions of the national standard fire fire classification, fire divided into A, B, C, D, E five types, respectively mean: A type of fire: the solid material fire. This material often has the properties of organic compounds, generally in the burning hot embers. Such as wood, cotton, paper and other fire. Class B fires: the liquid fire and molten solid substances fire. Such as gasoline, kerosene, crude oil, methanol, ethanol, asphalt and other fire. Class C fires: the gas fire. Such as natural gas, hydrogen, methane, gas and so on. Class D fire: the metal fire. Such as potassium, sodium, titanium, lithium, aluminum-magnesium alloy fires. Class E fire: live equipment fire. Such as generators, cables, and household appliances. The dry powder extinguishing agent is generally divided into two categories of BC powder and ABC powder to extinguish Class D fires BCD dry powder rare production; emerging new market: the performance of the ultrafine powder extinguishing agent should also be included in the ABC's major fine dry powder extinguishing efficiency is far greater than ordinary ABC powder, but the fire extinguishing category with ordinary ABC powder extinguishing agent, and to destroy the ABC class fire and charged equipment fire;, or separately introduced in order to understand its performance. BC powder extinguishing agent: BC dry powder BC type of fire can be extinguished. Apply to the initial fire of flammable and combustible liquids, gases, and live equipment, not suitable for the fire of solid substances. Therefore, the power distribution room, kitchen, computer room class prone combustible liquid gas fire and live fire places, with BC powder extinguishing agent. But these places are often not a simple liquid and gas fires; Therefore, such places are mostly equipped with ABC class dry powder extinguishing agent. 2, ABC dry powder extinguishing agents: the type of extinguishing agent can be solids, liquids, gases and electrically charged equipment fire fighting, scope of application of the most widely used.