You might try what we used to do in the old days. Just reduce your sprinkler spacing so you drop your water demand at the remote sprinkler which will also drop the pressure required at the remote sprinkler. It will require more sprinklers but it might work. Before the advent of all of the new large orifice sprinklers we used this method to make the calculations work. \Mike Brown
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Reza Esmaeili Sent: Saturday, August 11, 2007 1:56 AM To: [email protected] Subject: Sprinkler Selection Question Dear Friends, I have a question about a sprinkler system, with the specifications below: - Main fire pump outlet pressure: 9 Bar. Most Remote Room Specifications: - Number of sprinklers in the room: 140 Pcs - Required Density: 24.5 l/min/m©÷ - Most remote sprinkler pressure loss: 2.5 to 3 Bar. - One sprinkler covarage: 9m©÷ As the density is 24,5 l/min/m©÷ and (1spk /9m©÷) so flow rate of each sprinkler is 220.5 l/min=58.3 GPM Q=K¡îP then 58.3 = K ¡îP If K=80 (or 5.55) then 58.3 = 5.55 ¡îP then P = 7.6 Bar If K=160 (or 11.1) then 58.3 =11.1 ¡îP then P = 1.9 Bar - If we choose K=80, as the pressure at most remote sprinkler is about 6 - 6.5 Bar so the available pressure is less than the required sprinkler pressure which is 7.6 Bar. - If we choose K=160, we don't have pressure problem but the density will be more than what we require. GPM = 11.1 ¡î(6x14.51) = 104 GPM Can anyone kindly let me know what K factor should I choose and why? Thanks for your help, 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)
