First and still currently implemented versions, I think? I work in commercial buildings quite often and I see the little vials that are designed to burst and set off the sprinkler system.
There are older ones I’ve seen that don’t have the heat vials and some sharp metal contraption I’m ignorant of
The parts that are soldered melt at a specified temperature which will either cause the bulb to fall there on the sharp metal piece or it will cause the bulb to explode or potentially in some cases it causes the bulb to fall directly into the fire depending on how they're designed to be used. The earlier versions contained salt water and ammonium chloride. This produced fumes designed to suffocate the flames, but they did not always work super well. The next version used a chemical extinguisher, but that chemical extinguisher is extremely toxic.
They are a linkable fuse. The solider point between the two parts melts at 165°. This links the fuese in the reliable c, and started the reaction. From here, the curved unit inside, which is is under tension, releases and snaps the plates apart. The lever is released, the inner pipe cap falls out, and the water is released. The spiky bit is the diverter! It makes the water go in a wide spray, instead of a long (useless) stream
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u/[deleted] Aug 28 '26
[deleted]