There are a few issues this brings up with using nitrogen on a wet system. As far as I am aware, the maximum maintenance pressure for nitrogen generators (provided you’re using a generator and not a nitrogen cylinder) is around 80 psi. Purging the system of oxygen is typically done by a remote purge valve, left open for up to 1 month, or an automated purge valve. These valves do not purge when water is located at this purge valve. So you have two possibilities to inert the system.
* Leave the system down (not automatic) in nature for up to 1 month to purge the oxygen? * Are you using a nitrogen cylinder to fill the system with nitrogen prior to introducing water? There may be a way to install a dry system to keep the system automatic, set it up, and when purged turn it to a wet system but this seems overly complicated. Jamie Seidl NICET SET #107472 Century Fire Protection<http://www.centuryfp.com/> | General Manager 3600 Woodpark Blvd. Suite G Charlotte, NC 28206 ____________________________________________________________________ p 704 888 3473 | m 704 650 0033 From: Tim Easter <[email protected]> Sent: Tuesday, October 29, 2024 6:22 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Help with nitrogen pressure External Email: ONLY open links/attachments from known safe sources If a wet pipe system is inerted with nitrogen what does nitrogen pressure need to be? Thanks
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