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In a Compressed Air Foam System (CAFS), air or another gas is compressed and introduced into the foam solution. Larger systems use a dedicated air compressor and compresses regular air from the atmosphere.
Smaller systems can use any inert compressed gas such as Carbon Dioxide (CO2), Compressed Nitrogen (N2) or smaller tanks of compressed regular air.
The simplest, most efficient and least expensive way of producing foam is with a portable foam eductor. These foam systems use regular hand lines and an eductuor 100 feet from the end of the nozzle. The eductor siphons foam solution from a tank or drum using the "Venturi" principal. When the foam solution reaches a standard fog nozzle, water pressure and the broken stream produced by the nozzle introduce air into the foam solution.
There are other forms of nozzles that introduce water using the "Venturi" effect that are not user adjustable like a fog nozzle.
The quick easy answer is regular air is used most commonly in fire fighting foam however CO2 and N2 can be used depending on the design of the system used.
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What gas is used to make foam for firefighting?
which gas helps to make the foam that firefighters use
What gas is used to make the foam for firefighters?
The same air that we breathe !!
What is the gas that helps to make the foam that firefighters use?
fire retardants used in the foam are trimethyltrimethylene glycol and hexylene glycol.
What is the gas that is used in foam used by firefighters?
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Which gas is in the foam used by firefighters?
Carbon Dioxide is the most common gas in fire extinguishers.
What gas makes the foam firefighters use?
It's Carbon Dioxide (CO2)
What gases are in firefighters foam?
The foam is not gas, but chemicals that prevent the fuel source in a fire from receiving the oxygen needed to sustain a fire.
Does nitrogen help to make foam that firefighters use?
Yeah because it makes it wet ;)
Why gas helps to make the foam that firefighters use?
AFFF or aqueous fire fighting foam is a chemical agent that is added to water usually at a rate of about 300:1 (300gal water for 1gal foam concentrate) this mixture is then mixed with the outside air as it exits the nozzle and creates a blanket of foam that suffocates the fire.
Which is the gas that helps to make foam that firefighters use?
Air is the gas most commonly used to create the foam that firefighters use. Most commonly, the foam is generated by adding a small amount (1%-5%) of foaming agent into the water flow coming from the fire engine. This is done by either injecting it into the water stream with a small metering pump, or with a foam eductor which draws the foam into the water stream using a venturi. A foam play pipe, or Foam nozzle is used on the end of the water line which is designed to draw air into the stream of water, and creates the foam. More recently air compressors (CAFS - Compressed Air Foam System) are being added to some newer fire apparatus which injects air directly into the water stream. This allows for even less water to be used in firefighting, and produces a more consistant foam.
Is a fire extinguisher the smae foam firefighters use?
No. Fire extinguishers use a dry powder to smother the fire. Firefighters use two types of foam that can be broken down into more categories. A class "A" foam is actually a type of soap. It is used to break up water tension so that water can seep into the ground and/or fuel better. A class "B" foam is used to make a blanket that smothers gasoline or diesel type fires.
A gas that helps make foam?
Air is the simplest example.
