CM-7 does not produce toxic gases. It converts toxic gases created by the fire itself into additional fire-extinguishing chemicals. As it seems like Red Comet doesn’t hold any patents for inventions in chemistry, most likely it’s a hydrochlorofluorocarbon that’s been known at that time.
This fire extinguisher was brought to me to show to you all. Actually there are three in the collection. There are two yellow ones and one red one. The mount below is one of two types in the collection. You can view information on the extinguishers HERE .The extinguishers are in excellent condition and the fusible links are intact.
Red Comet Fire Extinguishers – Collectors Weekly
Red Comet Fire Extinguishers. In Firefighting > Fire Extinguishers > Show & Tell. Fire Extinguishers 147 of 166: 4. … Vintage General Fire Extinguisher C… $79. Vintage Copper & Brass Pyrene Soda … $154. See all. Comments. Pat …
Red Comet developed fire extinguisher fuses that were set off when the temperature rose to 160 degrees. In automobile fire extinguishers the fuses were set at 255 degrees to allow for the extra heat developed in engines. The fluid used in the fire extinguishers came from Dow Chemical Co. and two other firms in Freeport, Texas.
People Also Ask what is cm7 in a red comet fire extinguisher
What is Red Comet fire extinguisher?
Red Comet became known for such developments as the "smash or slug" method of crashing glass and scattering the fluid in midair. Red Comet developed fire extinguisher fuses that were set off when the temperature rose to 160 degrees. In automobile fire extinguishers the fuses were set at 255 degrees to allow for the extra heat developed in engines.
Is CM-7 the same thing as Red Comet fire grenades?
Red Comet Manufacturing changed the liquid in their fire grenades from carbon tetrachloride to something they referred to as CM-7 in 1955. Is CM-7 the same thing as azeotropic dichloromethane? If not, what is the composition of CM-7?
What is Cm7 in a grenade extinguisher?
CM-7, which has replaced carbon tetrachloride in all our grenade extinguishers. CM-7 does not produce toxic gases. It converts toxic gases created by the fire itself into additional fire-extinguishing chemicals.
What is the chemical composition of an MC-7 fire extinguisher?
These days MC-7 extinguishers are sold as vintage items, and uniformly it’s claimed (e.g. here and there) that the liquid component is 1,1,2-Trichloro-1,2,2-trifluoroethane, which at that time indeed has been studied as a very unreactive (even upon heating) vaporizable liquid agent (e.g. Fire Research Abstracts and Reviews, Vol. 3 1961, p. 148 ).
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Red Comet fire grenade removing the toxic Carbon tetrachloride Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher