What is the difference between superfine dry powder and ordinary dry powder?


  1. The particle size of the fire extinguishing agent is different. The average particle size of ordinary dry powder is 30-60 microns, while 90% of ultra-fine dry powder has a particle size of fewer than 20 microns.
  2. Different fire extinguishing efficiency. Fire fighting theory and experiments have proved that: in dry powder fire extinguishing, only 20% of the fine powder plays a role in extinguishing the fire, and the thick part only plays a role in penetrating the fire field, so the ultra-fine dry powder can quickly react with the flame, almost All play a role in fire extinguishing; according to the data published in international literature, the fire extinguishing efficiency of ultra-fine dry powder fire extinguishing agent is 6-8 times that of ordinary dry powder fire extinguishing agent and 4 times that of halon.
  3. Different fire fighting methods. Ordinary dry powder is generally only suitable for local application of fire extinguishing. The ultra-fine dry powder has a good effect on total submergence. The powder mist also has heattaxis and can actively capture the combustion base. It is not only suitable for fully submerged fire extinguishing in relatively closed spaces but also suitable for open places. Local application of fire fighting.
  4. The fire extinguishing agent formula is different. Ordinary dry powder is easy to absorb moisture and agglomerate, and it is corrosive to the protective material. The residue after fire extinguishing is difficult to remove. Generally, it is required to replace the agent once a year. The ultra-fine dry powder can be moisture-proof as a whole, has good fluidity and electrical insulation has no corrosion to the protection and has no irritation to the human body. The residue is easy to remove after the fire is extinguished. The validity period of the fire extinguishing agent is increased to more than 5 years.
  5. Different anti-resume effects. Due to the coverage thickness and bulk density of the fire extinguishing agent affecting the resurgence resistance, especially for Class A deep fires (such as cables), the ultra-fine dry powder coating has a more detailed particle size to isolate the air, which is more resistant than ordinary dry powder. The resurgence effect is better.