The FD Capt. and I are on the same page with this, and I forgot to add I was color coding the hydrants for Class B. The file for the buildings/development will be amended for water volume. We're more concerned with the next crew who may not know, landscapers, etc. How this system configuration ever got approved is everyone involved's questioning.
Funny, I looked at another in RI yesterday, group 4 non-encapsulated stored to 30', aisles under 8', dry system (used to be a refrigerated building), overhead only, no racks, 2500 gpm pump at 125, water supply is 30 psi and drops to 0 at 1800. Placard says .57/2600 w/233 heads flowing. Tenant is FEMA. I think there's more there than a suction control valve. -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Ron Greenman via Sprinklerforum Sent: Thursday, July 29, 2021 3:39 PM To: [email protected] Cc: Ron Greenman <[email protected]> Subject: Re: FP Suction Control Valve I think I’ve preached this before but to my way of think standpipes and hydrants are the drivers of design when present with sprinklers acting as a first line of containment, buying time for manual suppression. That they work so well at suppression so often is an added bonus. On Thu, Jul 29, 2021 at 12:03 PM cw bamford via Sprinklerforum < [email protected]> wrote: > I looked at this Question a few times and finally saw - > "....3 hydrants it serves....." > > my initial thought was 750 gpm pump x 1.5 = 1125 gpm Max. design > that's a big for an apartment and 13R > > 1125 gpm 60 minute supply 67,500 gallons or double that for 120 > minutes > > Was pump designed for hydrants? Does it need a Tank? > Standpipe Design? > > could a "New Controller" that Limits PSI be installed ? > > > On Tue, Jul 27, 2021 at 4:28 AM Tom Duross via Sprinklerforum < > [email protected]> wrote: > > > Good morning Campers. Looking for advice and comments. > > > > I have an existing diesel driven fire pump in a prefabricated pump > > house installed in 2012 serving 2 apartment buildings. > > > > I first tested this pump in 2017, had 13 hours on it, ran fine but > > we ran out of water at just about 100% capacity. > > > > Spent the day with the water department a few days later checking > > underground valves, flowing a few street main’s hydrants, basically > > came > to > > the conclusion that this is all we got. Wrote up a report, > > suggested > they > > hire an FPE to see if the pump’s tested capacity meets requirements, > > how did this happen, what about the hydrants off this system, stuff > > like that. I think I stirred the sleepy caldron a little. > > > > Didn’t hear back from the client until this spring. Apparently they > > changed ITM contractors and the new one didn’t pan out. They had a > > balcony fire May 2021, gas grille, 13R system with no attic > > protection, non-completed > attic > > separations and fire walls, etc. Fortunately they had a response so > > quickly it never made it to penetrate the eaves and soffits and was > > extinguished between the 5th and 6th (top) floors. Local FD must > > have had a field day with a Q20 of about 800 and closest city > > hydrant ¼ mile away. Waiting > for > > incident report to review. > > > > > > > > So back to my query. It’s a xy&em pump house. All welded sch40 and > > painted. Not the greatest build as there’s a 6” BFP vertically > > installed right off the incoming service with elbows turning it > > around and down to the floor to feed the pump. Just a few spacers > > in the piping so no room for slipping in this device unless > > something gets removed or moved. 4-15 of > > #20 > > (2013) says between the pump discharge and check and I get that but > > also defers to the mfgr. for direction. Looking at the various > > offerings most are a little vague on placement and even one says > > after the pump > discharge > > valve. Without major surgery, I have 2 spots to slip in this 20” > > long device. I can remove the relief valve between the discharge > > increaser > and > > pump check and put it there ‘or’ I can remove the tee feeding a 6” > > storz and check located between the discharge valve and the city > > bypass. The > former > > will allow me to test through the device but the latter will not. I > don’t > > believe either of these appurtenances are necessary and I will > > explain (he’s still rambling? Jeepers….). The engine is a small JD > > inline 4 running > > 3000 > > rpm, single ECM, max. speed is 3300. Churn is 155 at 3025. I > > haven’t physically done it but if I extrapolate to 3300 I get 170 > > psi. I’m below > > 175 so I think the PRV can go. If I opt to remove the storz I can > > but testing this pump will have to be via the 3 hydrants it serves, > > in > addition > > to the 2 buildings. I honestly don’t know why the engineer (small > > E) > had a > > storz included as this house it atop a hill in the woods ½ mile away > from a > > city hydrant and these buildings. > > > > > > > > OK, done rambling. Loose the PRV or keep scratching my head? > > > > > > > > Let’s go Red Sox! > > > > > > > > Tom Duross > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org > -- Sent from Gmail Mobile _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
