I'll ask another question. How many and what size pumps are required to meet the sprinkler demand?
Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT www.fpdc.com 860-535-2080 (ofc) > On Mar 6, 2014, at 10:08 PM, Brad Casterline <[email protected]> wrote: > > It occurs to me you are looking for answers not questions-- I'll run back up > to the nosebleed section now and just spectate > >> On Mar 6, 2014, at 8:41 PM, Brad Casterline <[email protected]> wrote: >> >> Shouldn't the order of operation be farthest from tank, middle, closest to >> tank? Especially if farthest is weakest? >> >>> On Mar 6, 2014, at 8:30 PM, "J. Scott Mitchell, PE" <[email protected]> >>> wrote: >>> >>> 100% guess, but the first two may be intended to support the fire sprinkler >>> system in the building with the third one coming on late in a bad game to >>> support hose streams. >>> >>> Just a thought. >>> >>> J. Scott Mitchell, PE >>> >>> >>> Sent from my Verizon Wireless 4G LTE smartphone >>> >>> -------- Original message -------- >>> From: Brad Casterline <[email protected]> >>> Date:03/06/2014 8:14 PM (GMT-06:00) >>> To: [email protected] >>> Subject: Re: Pump House Controls >>> >>> Correction on pump #3? Should be 2500 @ 65, not 2000 @ 65? >>> >>>> On Mar 6, 2014, at 6:54 PM, "Tom Duross" <[email protected]> wrote: >>>> >>>> I have a question regarding how you guys would control this. >>>> >>>> Outside pump house with aboveground tank, 500,000 gal. >>>> Three diesel drive fire pumps in parallel from 10" tank supply to 10" yard >>>> supply. >>>> All three pumps are rated at 2500 GPM but different pressure ratings. >>>> I have no design information right now but it's a record storage facility, >>>> 50' high piles of paper, fwiw. >>>> I'm looking at replacing one of the pumps, the oldest and original, I'll >>>> call it pump #1. >>>> Pump #1, original 1971 is a 10x8 rated for 2500@125 PSI. >>>> Pump #2 was replaced in 2003, same model 10x8, nice tier 2, 2500@125. >>>> Check. >>>> Pump #3 was replaced in 1994, same model 10x8, but 2000@65. Huh? >>>> Jockeys are dual vertical turbine, 100@140. Check. >>>> If I work under the premise of direct replacement and quote a 2500@125, >>>> tier >>>> 3 or 4, >>>> how would you guys balance these pumps for lead to lag with a pump so small >>>> compared to the rest? >>>> Pump #2 becomes the lead pump and #1 and #3 fall in 10# each behind? >>>> TD >>>> >>>> >>>> _______________________________________________ >>>> 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 >>> _______________________________________________ >>> 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 > _______________________________________________ > 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
