Dry sprinkler system and the pre action what specific differences. Pre acting without air compressor can not.
The dry type is wet relative, the wet pipe is water, and the dry pipe is pressurized air. The biggest difference between the dry system and pre action system, pre action system and alarm system, smoke temperature alarm valve into open pre wet spray nozzle system, burst, and dry, no alarm system, direct burst water exhaust nozzle!
The pre acting automatic sprinkler system refers to the closed water system which is not filled with water in the quasi working state. The fire alarm system is turned on by the automatic fire alarm system, and then converted into a wet system.
Automatic water spray extinguishing system is dry dry alarm valve after the piping system is filled with air or nitrogen are installed on the automatic sprinkler sprinkler nozzle, when the nozzle from heat release after the driver opened fire, the first jet nozzle in the gas pipes, exhaust gas, pressure water through the pipe to the nozzle sprinkler.
