【 Weak current College 】 carbon dioxide fire extinguisher maintenance practice---Power By 【 China power house network 】

1. Visual inspection

Fire extinguishers, first before servicing shall be in accordance with the technical requirements for maintenance of fire extinguishers, fire extinguishers for Visual inspection. Check-in age of 12 years and the barrel is rust severely and patent leather shedding of fire extinguishers, no maintenance, do to permanent marker and complete scrap.

Second, the pressure relief

The Visual inspection qualified fire extinguisher with pressure relief. First open fire extinguisher body operating mechanism, let its internal pressure.

Third, the disintegration

The relief of fire extinguishers to be demolished. Disassembly will fire extinguishers installed on a dedicated jigs, uses special wrenches to remove the head of the fire extinguishers. Water fire extinguishers for head and clean drum body.

4. split for maintenance

Will remove all head bus, cleaner head inside. Using compressed air to clean the inside of the siphon tube, ensuring the smooth flow of gas bottles. Replacement sealing ring, core, replace the insurance piece. Check the push rod, spring is intact, and then make the water pressure test.

5. hydraulic test

Will be cleaned of barrel filled with water, the water temperature is not lower than 5C ° clear water, installed in the hydraulic test bench, and then start the pump and repeated pressure boosting, several times, exclude the water gas, pressure slowly even risen to fire extinguisher maintenance technical requirements should be met in the hydrostatic test pressure values that maintain a 22.5MPA, stability, observe no minutes were compromised and macroscopic deformation. Hydraulic test, you should fill in the hydraulic test records, disclosure or macroscopic deformation of fire extinguishers should be scrapped. And fill in the scrap, and barrel body do permanent marker.

6. drying

The hydraulic test qualified barrels placed upside down to make water, drying equipment, drying equipment must not exceed 100C °. In case the patent leather peeling, internal drum body thoroughly dry, remove from baking equipment, ready to assemble.

VII. fire extinguishers Assembly

The repair of fire extinguishers for head and after drying drum body junction coating properties stable sealing packing, connections should be left after 3-4, thread the connections should be sealed well prepared filling carbon dioxide fire extinguishing agent.

VIII. medium filling

Will assemble the head of the fire exit and filling machine console connected, open the valve's operating facilities for filling of carbon dioxide, its filling quantity must comply with the requirements. On the basis of the corresponding specification minus 0.5 resulting value. Fire extinguisher filling errors.

9. air tightness test

The filling good fire extinguisher upright placed in 50C °-55C ° of clear water, the surface should be above the top of the fire extinguishers, maintain 50mm 60 minutes, and observing for any disclosure of the bubble.

10. the factory inspection

The maintenance of fire extinguishers installed after passing the blast hose, loaded on insurance sales lead seals fight, clean appearance. Last post on fire station printed labeled with a fire extinguisher maintenance time, testing, maintenance and certification, preparing the factory.