![Utilizing A Nitrogen Generator For Pre-Action Systems In Critical Facilities Applications | Mission Critical Magazine Utilizing A Nitrogen Generator For Pre-Action Systems In Critical Facilities Applications | Mission Critical Magazine](https://www.missioncriticalmagazine.com/ext/resources/Issues/March-April-2013/mc0313-gilmore-fig2-615.jpg)
Utilizing A Nitrogen Generator For Pre-Action Systems In Critical Facilities Applications | Mission Critical Magazine
Mechanical construction - 1. Pre-action fire sprinklers are a dry sprinkler system, water is not contained in the pipes but is held back by a pre-action valve. Pre-action valves are electrically operated
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