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preaction fire alarm valve automatic alarm valve system
Preaction system is automatic fire detection and alarm technology and automatic sprinkler system All together, in the closed sprinkler installed in the system. Usually without system when a fire breaks out the pipe filled with low pressure air or nitrogen for monitoring, so the system has the characteristics of dry type system. So it is suitable for installation in the both need to put out the fire with water, but never in areas are not allowed to fire running water. For example, library, archives, valuables storage room, computer room and so on. Also alternative dry system installed in areas such as high severe ice frozen.