Please brush up on NFPA 20. bc On May 18, 2016 2:48 PM, "Travis Mack, SET" <[email protected]> wrote:
> I think he is trying to get at the max capacity of a pump so that the > municipal water supply doesn't go below 20 psi. So, if his factor comes to > a max of 1200 and the system requires a 1500 gpm pump, then a tank is going > to be required. That is my assumption at least. > > Travis Mack, SET > MFP Design, LLC > 2508 E Lodgepole Drive > Gilbert, AZ 85298480-505-9271 > fax: 866-430-6107email:[email protected] > http://www.mfpdesign.comhttps://www.facebook.com/pages/MFP-Design-LLC/92218417692 > Send large files to us via: https://www.hightail.com/u/MFPDesign > LinkedIn: https://www.linkedin.com/in/travismack > > On 5/18/2016 12:46 PM, [email protected] wrote: > > Still not sure what that is supposed to represent or what you’re trying > to calculate. > > > > > *Craig L. Prahl* > Fire Protection Group Lead/SME > *CH2M* > 200 Verdae Blvd. > Greenville, SC 29607 > Direct - 864.920.7540 > > Fax - 864.920.7129 > > CH2MHILL Extension 77540 > [email protected] > > > > *From:* Sprinklerforum [ > mailto:[email protected] > <[email protected]>] *On Behalf Of *Zachary > Siegrist > *Sent:* Wednesday, May 18, 2016 3:42 PM > *To:* [email protected] > *Subject:* Re: Equation for sizing fire pump > > > > Sorry, I am looking at the wrong equation. That equation just ensures I > have 20 psi available at 159 percent. > > On Wednesday, May 18, 2016, <[email protected]> wrote: > > What are you supplying with your pump? > > > > I’m not seeing any correlation between a flow at 20 psi and sizing a > pump. What flow are you talking about, a municipal flow rate or what? > > > > If for sprinkler systems, you size the pump based on the characteristics > of the water supply and the system demands. > > > > There are ways to get an estimate on pump size but the final selection > better be verified through hydraulic calculations. > > > > > *Craig L. Prahl* > Fire Protection Group Lead/SME > *CH2M* > 200 Verdae Blvd. > Greenville, SC 29607 > Direct - 864.920.7540 > > Fax - 864.920.7129 > > CH2MHILL Extension 77540 > [email protected] > > > > *From:* Sprinklerforum [mailto: > [email protected]] *On Behalf Of *Zachary > Siegrist > *Sent:* Wednesday, May 18, 2016 3:23 PM > *To:* [email protected] > *Subject:* Equation for sizing fire pump > > > > Is there an equation to specify an appropriate pressure when sizing a fire > pump? For example, when sizing gpm, I've always taken the GPM available at > 20 psi divided by 1.5 to give me the maximum GPM rating of the pump. I'm > inquiring to see if such a formula is available to size the pressure > correctly. Can anyone help? > > > > Zach Siegrist > > > > _______________________________________________ > Sprinklerforum mailing > [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 > >
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