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 85298
480-505-9271
fax: 866-430-6107
email:[email protected]
http://www.mfpdesign.com
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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]] *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]
<mailto:[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]
<javascript:_e(%7B%7D,'cvml','[email protected]');>
*From:*Sprinklerforum
[mailto:[email protected]
<javascript:_e(%7B%7D,'cvml','[email protected]');>]
*On Behalf Of *Zachary Siegrist
*Sent:* Wednesday, May 18, 2016 3:23 PM
*To:* [email protected]
<javascript:_e(%7B%7D,'cvml','[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
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