I. Introduction MFZ / BC, MFZ / ABC series of dry powder fire extinguisher is in accordance with GB4351-2005 standards of production, its high-quality carbon steel cylinder using special processing technology from. The series of fire extinguisher has a simple structure, flexible operation widely application, easy to use, low cost advantages. Widely used in various industries. 1,2kg which is particularly suitable for families and a variety of small cars. Second, the structure and composition of the main fire extinguisher fire extinguisher from the cylinder, bottle valve, spray hose (nozzle) and other components, fire extinguishing agent is sodium bicarbonate (ABC type of ammonium phosphate) fire extinguishing agent, driving gas is nitrogen, at room temperature its working pressure of 1.5MPa. Third, the main performance characteristics 1, the series of fire extinguishers with high efficiency, rapid fire and other features, a built-in dry powder fire extinguishing agent has good electrical insulation, not easy to damp, metamorphism, easy storage and so on. 2, the driving gas used non-toxic, tasteless, after injection of the human body without harm. 3, fire extinguisher bottle valve fitted with a pressure gauge, a display of its internal pressure effect, easy inspection. Fourth, the use of 1 for fire fighting since the beginning of flammable liquids and gases, can also be charged fire fighting equipment, which MFZ / ABC type can also be used for fighting fires of flammable solids. Widely used in oil fields, oil depots, factories, shops, power distribution room and other places, it is to prevent fires to protect people's life and property necessary firefighting equipment. 2. Use temperature range: -20 ℃ ~ + 55 ℃. Fifth, the main technical parameters (20 ℃ ± 5 ℃) Weight kg effective fire extinguishing agent injection time s Effective injection distance m s spray jet lag time remaining rate% kv electrical insulation level firefighting AB MFZ / ABC1 1 ± 0.05 ≥8 ≥3.0 ≤ 5 ≤15 ≥5 1 21 MFZ / ABC2 2 ± 0.06 ≥8 ≥3.0 1 21 MFZ / ABC3 3 ± 0.09 ≥13 ≥3.5 2 34 MFZ / ABC4 4 ± 0.08 ≥13 ≥3.5 2 55 MFZ / ABC5 5 ± 0.10 ≥ 13 ≥3.5 3 89 MFZ / ABC8 8 ± 0.16 ≥15 ≥4.5 4 144 MFZ / 2 2 ± 0.06 ≥8 ≥3.0 21 MFZ / 4 4 ± 0.08 ≥9 ≥3.5 55 MFZ / 8 8 ± 0.16 ≥15 ≥4.5 144 Sixth, sketch 1, siphons; 2, Pentong assembly; 3, cylinder assemblies; 4, safety device; 5, head assembly. Seven, to use the extinguisher to the fire scene, pulled the pin, grip spray hose, pressure BAR, aligning fire extinguishing flame roots; release handle, to stop the jet, in order to achieve a gap jet. Eight, maintenance 1, the storage environment temperature: -10 ℃ ~ + 45 ℃; not in the hot sun exposure, close to the fire source or subject to severe vibration. 2, fire extinguishers should be kept secure, dry and ventilated storage place. 3, always check the safety pin and the seal is intact, the pressure to meet the requirements, parts are loose, deformation, corrosion or damage. 4, fire extinguisher after the expiry of two years or every five years should be checked before refillable bottle valve, nozzles and other damage, check the cylinder for corrosion; and 2.6MPa pressure test, the failure should be scrap. 5, fire extinguisher maintenance or refill by a qualified professional fire service department for repair, the user does not disassemble or repair;