You need a demand, no? Highest outlet times .433 equals so many psi, plus end head, friction loss in the pipe, backflow, and underground. It helps to know where the cut-off points for horsepower are though, price-wise, when, thinking, "hey I just need 120 but I'll say 146 because that's still less than 175". PSI vs GPM both do affect horsepower, but I think psi goes in smaller increments than gpm. On May 18, 2016 8:39 PM, "Parsley Consulting" <[email protected]> wrote:
> When I've been assigned to teach NFPA 20 for AFSA the presentation > includes a very simple process for sizing a fire pump. > > > *Ken Wagoner, SET Parsley Consulting* > > > > * 350 West 9th Avenue, Suite 206 Escondido, California 92025 Phone > 760-745-6181 <760-745-6181> Visit our website > <http://www.parsleyconsulting.com/> * > On 05/18/2016 4:02 PM, Roland Huggins wrote: > > I did an article in Sprinkler Age way back in the 90s on sizing pumps. > The methodology hasn’t changed other than newer equipment like variable > speed drivers but it’s still a good starting for for the basics. > > Roland > > > Roland Huggins, PE - VP Engineering > American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives > Dallas, TX > http://www.firesprinkler.org > > > > On May 18, 2016, at 12:23 PM, Zachary Siegrist <[email protected]> > wrote: > > 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 list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > > > _______________________________________________ > 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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