tudorsailor
Well-known member
These sticks Fire Safety Stick - Fire Extinguishing for the 21st Century are on sale through Force4. The video is encouraging but what is the truth? Anyone know?
TudorSailor
TudorSailor
The one minute run-time version would seem to have more extinguishing capacity than most large cylinder extinguishers.I regard these like small extinguishers - they are in the boat so you can get out. I have the large extinguisher in the cockpit locker for putting out a fire.
They are not approved in the US, for what ever that is worth (could be many reasons).
In the boat videoAll the videos are outdoors, I may be more convinced if demonstrated in a confined environment such as the Boat Test did with dry powder. They state not toxic, CO2 are not toxic but will kill you if too much oxygen displaced.
They have been available (possibly invented?) in Italy for over 10years now, first trade name "Mangiafuoco"; their web site said they adapted the fire extinguishing system of the Soyuz (?). I can't read the price on the Fire safety stick web wite but simlilar products are available say at Leroy Merlin for 35-45euro depending on duration 50-100sec.These sticks Fire Safety Stick - Fire Extinguishing for the 21st Century are on sale through Force4. The video is encouraging but what is the truth? Anyone know?
TudorSailor
- Google the health effects of photogenically generated aerosols.
Potassium Nitrate is saltpetre, the oxidant used in making gunpowder. Hardly useful in putting out fire - quite the reverse. Indeed any oxidiser is bad to add to fires.From their website:
"This process allows the stick to extinguish all types of fires through saturation, while its slow bio-degradation in the environment, further prevents the likelihood of subsequent fires.
The extinguishing process involves two different reactions: one is physical and the other, chemical. The physical reaction relates to potassium’s tendency to oxidise rapidly in air. When in contact with air, alkaline salts consume great quantities of oxygen, thus depriving fires of oxygen. Then the chemical reaction is created through the stable link between potassium particles and the fire’s combustion particles.
Through the two reactions, a quick oxidation process takes place, immediately transforming the jet from a solid state into a gaseous state freeing the potassium particles. These atoms are able to intercept and interrupt any other free particles produced by the fire’s natural chain reaction combustion process.
Potassium has strong inhibitor qualities due to its weak ionization energies. The extinguishing agent being used is composed of Potassium Nitrate, organic oxidizer, and plasticizer resin.
When Potassium Nitrate (KNO3) discharges from the extinguisher it vaporizes in the environment followed by the condensation of its extinguishing substance. When it reacts (inside the body of the extinguisher) it breaks down and the aerosol that is formed is made up primarily of free radicals of Potassium K+, of Nitrogen N (an inert gas), and water vapour.
The aerosol that comes out of the unit reacts with the fire. Potassium radicals (K+) capture the Oxygen of the combustion thereby extinguishing it.
At the end of the extinguishing process the following is discharged to the atmosphere:
As a solid: particles of Potassium (that have reacted with the Oxygen of the fire) having a size between 3-4 microns. These particles are invisible at sight and heavier than air. They disperse in the atmosphere and tend to deposit on the ground in no appreciable amounts.
As a gas: As Nitrogen; an inert gas already present in the air we breathe at more or less 78%.
As water vapour (and lastly) extremely minimal toxic by-products that are a result of the combustion process."
Sorry, but this looks a total load of garbage to me. It would disgrace a GCSE chemistry student.