If applicable go 4 lines over to add in the 2 obstructed heads. Still 14 calc but no extra on the BL which is where it usually hurts.
Chris Cahill, P.E. Fire Protection Engineer Sentry Fire Protection, Inc. 763-658-4483 763-658-4921 fax Email: [email protected] Mail: P.O. Box 69 Waverly, MN 55390 Location: 4439 Hwy 12 SW Waverly, MN 55390 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ralphy Henderson Sent: Wednesday, August 05, 2009 1:53 PM To: [email protected] Subject: Re: Diesel Fire Pump with Pressure Reducing Valve Yes, the PRV was just one of the suggestions one of the guys mentioned if need be. We were looking at a 100 psi boost, 140 churn + 60 city = 200 psi.. But realistically we could upsize pipe more or find a pump with a flatter curve (or as someone mentioned the new governors on diesels) - we're already figuring 25.2k esfr's. We're looking at calcing 14 esfr's due to obstructions which is the reason for such high pressures.The only reason I brought up the PRV was to see if someone had an installation where one was included we're we can see everything to scale and compare the components and size limitations compared to the typical electrical pump setup. Only one of our guys has any experience with diesel but that was when they used to chisel plans on stone tablets - by his own admission, btw. :-)-Ralphy --- On Wed, 8/5/09, [email protected] <[email protected]> wrote: From: [email protected] <[email protected]> Subject: Re: Diesel Fire Pump with Pressure Reducing Valve To: "AFSA" <[email protected]> Date: Wednesday, August 5, 2009, 3:24 PM Can you use a lower-rated pump and still make the calc's work with larger pipe sizes or different (larger) ESFR K-factor? It's not a good practice to arbitrarily over design a pump and then use a device ramp the discharge pressure back down, especially if the only reason is to save on pipe sizing.. How much differential is there between highest anticipated churn and minimum required residual? Also, what are the required flow and pump rating in GPMv Sent from my Verizon Wireless BlackBerry -----Original Message----- From: Ralphy Henderson <[email protected]> Date: Wed, 5 Aug 2009 07:27:03 To: <[email protected]> Subject: RE: Diesel Fire Pump with Pressure Reducing Valve Sure, this is for ESFR drawing off city water supply. We're looking at potentially high pressures at churn and operation of first few sprinklers. --- On Tue, 8/4/09, Steve Leyton <[email protected]> wrote: From: Steve Leyton <[email protected]> Subject: RE: Diesel Fire Pump with Pressure Reducing Valve To: [email protected] Date: Tuesday, August 4, 2009, 9:57 PM If I might ask, what is the application? In other words, why the reducing valve and how is the discharge main to be configured? Steve Leyton Protection Design & Consulting San Diego, CA -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ralphy Henderson Sent: Tuesday, August 04, 2009 2:36 PM To: [email protected] Subject: Diesel Fire Pump with Pressure Reducing Valve Would anyone happen to have an example of a diesel driven fire pump with a pressure reducing valve downstream? I'm tossing around the options with our estimators and we'd like to compare pump room sizes etc...with projects that we've already done consisting of electric driven pumps (which we mostly do). Thanks,Ralphy _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) __________ Information from ESET NOD32 Antivirus, version of virus signature database 4306 (20090804)__________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 4306 (20090804)__________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
