The Yuantong Shenzhen Fire Valve Co., Ltd. Shenzhen reputation of the best fire-fighting equipment suppliers, mainly engaged in: Fire extinguishers, fire extinguisher maintenance, fire equipment, fire signs licensing, fire protection engineering, transportation equipment, fire safety exit lights, fire hydrants and other fire equipment products. Foam fire extinguisher of fire-fighting role: the combustion surface and the air in the foam covering layer formed on the surface of the burning material, isolated, play the role of suffocation fighting. Since the foam layer can prevent the thermal effect of the combustion zone and thus prevents evaporation of the combustible material itself and the combustible materials in the vicinity of the surface of the burning material. Foam precipitated water on the surface of the burning material and for cooling the foam heat produced by evaporation of water vapor can reduce the concentration of oxygen in the vicinity of the combustion products. The extinguishing foam fire extinguisher: applicable to Class A fire fighting, such as wood, cotton, hemp, paper, etc. fire, the general type of fire fighting, such as petroleum products, grease fires; but can not put out a water-soluble flammable class disaster fires of flammable liquids, such as alcohols, esters, ethers, ketones and other substances in the fire. Dry powder fire extinguisher dry powder fire extinguisher range: Suitable for fighting flammable liquid, gas, electrical, fire, and water should not be fighting the fire. The AC powder fire extinguisher can put out the charged substances fires and A, C, D substances burning fire. Role of the dry powder extinguishers: First, to eliminate the active ions travel generated by the combustion products, the combustion chain reaction interrupt; dry powder encountered high temperature decomposition of absorbing large quantities of heat, and the release of steam and carbon dioxide, to achieve the combustion zone of the cooling and dilution The role of oxygen in the air. 1211 fire extinguisher role: inhibit burning chain reaction, discontinue burning. With both cooling and a stifling effect. Carbon dioxide fire extinguisher carbon dioxide fire extinguisher role performance: when the combustion zone carbon dioxide content in the air reach 30% -50%, make burning off, mainly stifling effect, absorb thermal energy and carbon dioxide in the jet extinguishing process, also There are a cooling effect. Carbon dioxide extinguishing range: Suitable for fire fighting 600 volt electrical equipment, precision instruments, books, files, and the scope of oil, gas and fire not use water to put out the substance. 1211 fire extinguisher: for flammable and combustible liquids, gases, and live equipment fighting fires, but also on the surface of the solid material fire fighting (such as bamboo, paper, fabric, etc.), and is particularly suitable for precision instruments, computer fighting, precious relics and precious materials warehouse fire, but also the beginning of the fire fighting airplanes, cars, ships, hotels and other establishments. [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 best fire extinguisher maintenance company - Shenzhen far through fire valves]