What Tom said 100%. The only thing I might change is to put the two test valves out on the roof. Pretty standard out here. Who wants to drag hoses through stairwells?
On 11/22/07, Tom Duross <[EMAIL PROTECTED]> wrote: > You don't have to flow 500 from just one valve, it can be 2. > You can flow 250 on the 15th and 250 on the 16th or put 2 FDV's on the 16th. > Why not pressure regulating valves (spkr/hose) and do it right? > Restricting and reducing valves are junk and should be prohibited. > Don't forget drain risers. > Tom > > > > I guess I found the answer to one question. Pressure restricting hose valves > I found were listed only upto 175 psi inlet pressure. Are there any for over > 175 psi? My problem is with the pressure reducing valve (set at 165 psi) on > the second riser, I can't get 100 psi at the upper floors (below the 13th). > Any other options? > > Tony > > > I'm working on a 16 storey residential building. The contractor wants to use > 4" standpipe, resulting I need a 500 gpm @ 125 psi fire pump with the 76 psi > static city water supply to provide 100 gpm at the top floor. (500 gpm @ 100 > psi at the most remote hose connection and automatic standpipe is the local > requirement.) 13th floor up, the static pressure is less than 175 psi. I'm > planning to have two risers. An express riser off the full pump pressure and > a second riser after a pressure reducing valve set at 165 psi and located at > the ground floor. Both 4 inch risers will be steel schedule 10 with > victaulic fittings. All sprinkler heads will be standard (not rated for high > pressure). The express riser will supply the sprinklers and 2 1/2" hose > connections, 13th floor and up. I will be using pressure restricting hose > valves set at 100 psi for each floor. Can I take the hose connections (using > pressure restricting hose valves) from 12th floor down from the same express > riser? (static pressure will range from 175 to 225 psi). Anything else wrong > with this set up? Piping and fittings should be okay for less than 225 psi? > > Tony > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > -- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
