Is 71.5 the churn pressure of the pump? The pump will produce pressures higher than rated pressure when the flow is lower than rated flow.
Matt Grisé PE*, LEED AP Sales Engineer Alliance Fire Protection 130 w 9th Ave. North Kansas City, MO 64116 *Licensed in KS & MO 913.888.0647 ph 913.888.0618 f 913.927.0222 cell www. AFPsprink.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brian Harris Sent: Thursday, June 02, 2011 8:31 AM To: [email protected] Subject: Gravity Tanks Reviewing some calc's for a job that has a 30,000 gallon tank (gravity) that feeds a 500gpm @ 65psi pump that sits approx. 7' below the pump suction, no other sources of water supply. The current calc's show a static pressure of 71.5, residual of 65, and a flow of 500. I'm having a hard time coming up with the static of 71.5, what am I missing? Brian Harris, CET First Defense Fire Protection 11957 Ramah Church Road Huntersville, NC 28078 Phone: 704.948.3506 Fax: 704.948.3507 Nicet # 128476 ======= Email scanned by PC Tools - No viruses or spyware found. (Email Guard: 7.0.0.21, Virus/Spyware Database: 6.17450) http://www.pctools.com/ ======= _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
