Automatic shutdown
Automatic water fire extinguishing systems are divided into sprinkler and drencher extinguishing systems according to the type of irrigation channel according to СниП norms. Depending on whether the sprinkler system is filled with air or water, the feeding and distribution pipes are divided into water-filled, air-filled, air-and-water-filled. Drencher extinguishing systems are divided into several categories - electric, hydraulic, pneumatic, mechanical, combined.
According to the frequency of employment, they are divided into the following:
quick-acting - activation time 3 s. provided there are not too many
medium inertia - starting time 30 s.
inertial - starting time 30 s. much, but 180 s. provided there are not too many
According to the duration of his stay in working condition:
medium-term working condition – 30 min. not much
duration of working condition – 30 min. much, but 60 min. provided there are not too many
According to СНиП norms, automatic foam fire extinguishing systems - they differ according to the structural solution, the type of actuator, the time of activation, the time of remaining in the operational state and the distribution of dust. Automatic powder fire extinguishing systems are divided into sprinkler and drencher extinguishing systems according to the type of irrigation channel, as well as water extinguishing systems according to their structural solution. Drencher extinguishing systems are divided into electric, hydraulic, pneumatic, mechanical and combined categories.
The main difference between the automatic fire extinguishing system and the water extinguishing systems is the parameters of the operating time and the distribution of dust.
They are divided according to the duration of their employment:
short-term working condition – 10 min. not much
medium-term working condition - 15 min. not much
duration of working condition - 15 min. much, but 25 min. not much.
Installation of foam extinguishing according to the division of the foam:
low (5 to 20)
medium (more than 20 but not more than 200)
high (over 200)
