Micah, When you test the valves you will test each one individually flowing 250 gpm so therefore you have to size them individually.
On Tue, Oct 31, 2023 at 5:53 AM Micah Davis <[email protected]> wrote: > Good morning, Forum! I hope everyone is having a great week!! > > I think I got this right, but someone is questioning me. I have an > automatic standpipe with factory pressure-regulating valves (i.e., Zurn > 4000). When calculating residual pressures at the inlet of the PRV to be > used in the sizing charts, the question is, how much water should I be > flowing in the system? One suggestion is only flowing 250 gpm at the hose > valve you are sizing. The other suggestion is flowing the system demand > flow per NFPA 14. In this case, that would be 750 gpm (250 gpm at each of > the two most remote hose valves plus 250 gpm at the top of the only other > standpipe). We are in agreement that the calculation should be a source > calc to determine the actual pressure provided by the system. > > Thank you, > Micah Davis > Ferguson Fire Design > > _________________________________________________________ > SprinklerForum mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to > [email protected] -- Greg McGahan *Genesis Fire Services, LLC* *4912 Glover Lane. Milton, FL **32570* *P- 850-637-8535* *C- 850-712-9555*
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