While I'm not Richard, I've been told I can be a Rick. Why do you want to double the fittings, controllers, sensing lines, etc. by installing two pumps instead of one 2500 GPM pump? Not sure about your part of the world, but 2500 GPM is not all that unusual a pump size when protecting storage challenges today. If you don't have the misc draws common to a large industrial plant, since it's a factory and not a refinery/petrochem, are the draws for the pump limited to FP ? If you're not planning on the cycling Richard mentioned in large sites, I'm not sure of your logic in furnishing TWO pumps when ONE would do- especially if you're not proviing redundancy, the largest reason I could see to have multiple pumps.
The scenario you have presented don't look like there's a lot of high exposure save the deluge. So we don't have to worry about adjacent exposures, but it apears as if it is prudent to flow both the wet and the deluge simultaneously? 300 hose vrs a more traditional 500 (more if there are piles of combustibles in the yard) seems a little light. Ae there other sources for large FD draws? For that matter, is there an FD with apparatus? George Church Rowe Sprinkler -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Reza Esmaeili Sent: Wednesday, September 05, 2007 12:43 PM To: [email protected] Subject: RE: Fire Pump Selection - Another Question According to NFPA answer, you were right Richard, howeever NFPA answer was short for item 3. What I want to ask is simulating a real project like below: Imagine in a factory I want to select fire pump for my below demand: 1- Total demand of deluge system: 1500 GPM 2- Total demand of wet pipe sprinkler system: 700 GPM 3- Total demand of hose streams: 300 GPM. Total water demand: 2500 Gpm, Total pressure: 100 psi For this project as my source of power is reliable, I want select TWO parallel electric pumps with below specifications: Scenario 1: Two pumps( First: 1250Gpm ,100 Psi - Second: 1250 Gpm ,100Psi ) Scenario 2: Two pumps( First: 1500Gpm ,100 Psi - Second: 1000Gpm ,100Psi ) Scenario 3: Two pumps( First: 1500Gpm ,100 Psi - Second: 1500Gpm ,100Psi ) As my deluge demand is 1500 GPM, so which scenario is the best for my project? Note that I want to select one of the above scenarios and don't have any other options. Would you also please analyze each item. Thanks, Reza --------------------------------- Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
