What is class A foam concentrate?
Class A foam concentrates are specifically designed to combat fires involving ordinary combustible materials, like wood, paper, coal, rubber, and plastic by making water more effective. The concentrates reduce the surface tension of water providing superior wetting and penetrating characteristics.
What is a benefit of class A foam?
Class A Foam Benefits: Reflects radiant heat and is highly visible. Insulates fuels and excludes oxygen. Absorbs maximum BTU’s due to its large surface area. Clings to vertical surfaces and acts as a water reservoir. Penetrates water into fuels because of its low surface tension.
Is Class A foam safe?
Not a hazard in normal industrial use. Small amounts swallowed during normal handling operations are not likely to cause injury; swallowing large amounts may cause injury or irritation.
How long does Class A foam last?
The effective life of CLASS A PLUS foam concentrate can be maximized through optimal storage conditions and proper handling. CHEMGUARD concentrates have demonstrated effective firefighting performance with contents stored in the original package under proper conditions for more than 10 years.
What percentage is Class A foam mixed at?
0.1% to 1.0%
Class “A” foam concentrates are generally mixed with water in ratios from 0.1% to 1.0%. They can be added to the fire stream by premixing in the tank, mechanical eductors, or electronic injection systems.
What is class B foam made of?
Class B foams can be protein foams or synthetic foams. Protein foams contain natural proteins and are generally biodegradable; synthetic foams are made of synthetic foaming agents.
Which type of foam proportioner relies on the Venturi effect?
National Foam Proportioners utilize the water flowing through them to produce a venturi effect that induces foam concentrate into the water stream.
Does Class A foam expire?
If kept in the original unopened and airtight Chemguard supplied container and stored within the temperature range of 35ºF – 120ºF (2ºC – 49ºC) a shelf life of between 20-25 years can be expected. When stored in other than the manufacturers supplied container, please check with Chemguard for storage guidelines.