Sidestep the issue. If you can, pull a slight vacuum on the standpipe instead of pressurizing it.
> On Feb 28, 2017, at 7:17 AM, Mike Stossel <[email protected]> wrote: > > I am trying to calculate the time it will take for a 2-1/2” hose valve to > relieve a standpipe system of air. I am designing a temporary standpipe > system in NYC and the requirement is to fill the entire system with air and a > single 2-1/2” hose valve needs to relieve the pressure within 3 minutes or a > second will need to be added. My total system volume will be 1902 gallons > and the staring air pressure will be at 18psi. Does anyone know of a way to > calculate this? > > Thanks for the help. > > Mike Stossel SET > <image003.png> > 36 Barren Road > East Stroudsburg, PA 18302 > Office: 973-670-2627 > [email protected] <mailto:[email protected]> > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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