Hampton E2-1

Compressed – Air – Foam – System (CAFS)

Did you Know?

  • CAFS only uses 1/3 of 1% or (.03%) of a gallon of Class A Foam for every 100 gallons of water used.?
  • Just adding Class A Foam to water makes the finished foam solution 3 times more effective than just water alone when fighting a fire?
  • Just adding Compressed Air to the Class A Foam Solution above will increase its firefighting effectiveness from 3 times to 7 to 10 time that of the fighting fires with just water.
  • CAFS has no friction loss in any size hose line over any distance?
  • CAFS can be flowed through any Fire Engine already set up on the fire ground and use the preexisting hand-lines already in operation.
  • CAFS can be pumped into any aerial ladder pipe for elevated streams.

Did I tell you?

  • One 1.5 inch CAFS nozzle connected to a 1.75 inch fire hose only puts out 60 gpm of CAFS Foam Solution, with a nozzle tip pressure of 110 psi and the line weighs 66% less than the average 1.5 inch combination nozzle connected to 1.75 inch fire hose putting out 125 gpm at a nozzle tip pressure of 100 psi.
  • One 60 gpm CAFS hand line will put out the same size fire as one 125 gpm water hand line in 1/5th the time, using 90% less water.
  • Did I mention, the little 4 man Attack CAFS Engine pictured above has a 1500 GPM Pump, 25 gallon Class A foam cell and a 250 Gallon water tank?

If you do the math, the little 4 man Attack CAFS Engine above, can put out a much fire as a 2500 gallon water tanker wile only using 250 gallons of water and 1.87 gallons of Class A Foam Solution.

  • Remember water weighs 8.34 pounds for every gallon used.
  • So 2500 Gallons of water from a tanker would weigh 20,850 pounds
  • 250 Gallons of Class A CAFS Solution would weigh 2,090 pounds  
  • Using CAFS Solution for structural firefighting only adds 1/10 of the weight placed on a structure of water.
  • CAFS uses 90%  less water resulting in less water damage.

A CAFS fire-stream at 60 gpm is operating at a 7:1 compounding factor with nearly total efficiency. In theory (and proven by test after test) the 60 gpm CAFS stream is actually generating approximately 500 gpm of finished foam output, which is staying put on the ceiling. That is where the heat and danger are and that is why in comparative tests a CAFS line is 7 to 10 times more efficient and quicker in obtaining knockdown. It’s not rocket science, just a little understanding to see how we can do more with less. Remember, bigger isn’t always better, right?

The following are measured results of fire suppression utilizing a thermocouple placed four feet off the floor for accurate temperature drop comparison, at the same application rate, under controlled supervision and conditions:

  • Water as a singular agent takes 222.9 seconds to cool a fire from 1,000 degrees Fahrenheit to 212 degrees Fahrenheit, at the rate of 3.5 degrees per second.
  • Nozzle Aspirated Foam, on the other hand, takes 102.9 seconds to achieve the same cooling effect at the rate of 7.6 degrees per second.
  • Compressed Air Foam tops them all at 38.5 seconds at a cooling rate of 20.5 degrees per second.
  • Compressed Air Foam proves it works 5 to 6 times faster than water on the same fire fuel load.

It’s interesting to note that these figures actually give credibility to the “seven bubble theory” or the 7:1 ratio of “bubblettes” created from a single droplet. The results show CAFS achieved nearly a seven times greater heat reduction, using approximately 15 percent of the water, in approximately 1/7th  of the time. Time after time, CAFS has proven its superiority in rapid and effective fire suppression.

For more information on CAFS, go to:

  • http://www.darley.com/showroom/cafs
  • http://www.cafsinfo.com
  • dan@hempfieldfireequip.com
  • or email a message to chief@hamptonvfd.org for more information on the unit pictured above.