The most recent versions of foam fire extinguishers which contain aqueous film forming foam (AFFF) must be among the best of the breed all around firefighting versions on the market today. In the past, they weren’t popular due to the greater price, the odor that was a result of the high animal protein material in the foam and the fact that the foam was so thick.
Happily new technology and manufacturing techniques have brought them down in cost and made them available to everyone that is fantastic news for firefighting.
It is easy to identify a foam extinguisher since it’s red with a cream panel which makes it a cinch to recognize it in any fire emergency. Visit the website http://www.cakengineer.com/product.php?protype=26 to learn more about foam system (which is also known as”ไปที่เว็บไซต์ http://www.cakengineer.com/product.php?protype=26 เพื่อเรียนรู้เพิ่มเติมเกี่ยวกับระบบโฟม” in the Thai language).
Another reason for them being so popular today is the fact they’re much lighter in weight than their own water-based competitors. This is achieved through the fact that they have superior firefighting attributes so a 6-liter foam version has the identical 13A fire rating as the equivalent 9-liter water units.
They’re also safe to use near electrical fire hazards but not directly on them. For that, you still require a CO2 model that’s why they’re frequently seen side by side in most work environments. The hose onto a foam extinguisher is non-conductive that’s why it’s safe to use near any fire involving power. You should only buy decent quality versions that conform to BS EN3 as they would have been analyzed to 35,000V dielectric tests according to BSEN3-7:2004.
Now how can a foam fire extinguisher really work I hear you ask? It’s quite simple really enjoy all great things in life. The spray nozzle connected to the unit sprays the AFFF foam evenly through the fire immediately and thus provides a protective coating preventing re-ignition.
The foam completely smothers the flame once triggered and seals in any damaging vapors under the foam coating. This will help to starve the fire of oxygen and thus safely extinguish it. When the foam is sprayed throughout the fire it also absorbs in precisely the exact same manner as water into any materials which may be penetrated and helps to cool them as the water inside the foam melts.
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