Fire engines with class A/B foam
Compressed air foam fire truck, also known as compressed air foam fire truck. This compressed air foam truck is loaded with water and high expansion foam fire agent, which has the characteristics of small water consumption, strong foam fire extinguishing penetration, minimal reignition, high fire extinguishing efficiency, and long foam fire range, etc. It has strong practicability in fighting high-rise buildings, oil and other fires.
Class A, class B (compressed air) foam extinguishing agent, foam fullness, fine, strong adhesion, formula using fluorocarbon composite surfactant, foam durability, water time stability, liquid water surface tension and interface tension are very low. The main advantages are fast fire control speed, high water use efficiency in fire site, thermal insulation and radiation protection, and significant effect of preventing reburning, which can greatly reduce the water damage loss in fire site. It can be adjusted at the ratio of 0.1 ~ 1%. A and B on the car are the types of foam agent.
In put out the class A fire fire (solid), not only can stick in the air bubble surface to form A layer of thermal radiation shield, stable and lasting bubbles would not flow, reduce the water damage, due to A steady stream of bubbles precipitation has A strong penetration ability of the viscous liquid, can penetrate deep into the Yin of solid combustion flame, promote combustion surface carbonization, cut off the combustion chain, terminate the combustion reaction.
In put class B fire (liquid), have a stable and lasting bubbles and stability analysis of water and foam under the action of water film spreading rapidly and lasting foam stability and the stability of the permanent drainage, not only can quickly put out the fire, and effectively prevent the combustion, so the product has advantages of good effect in foam stability, prevent recurrence.