Do you know how to do a flow rate projection from a two point flow test? I figure that with overflow your .45/2500 will require 1250 GPM + 500 GPM hose, yes? At 1750 GPM your flow test projects to a residual pressure of 22-23 PSI, so you don't need a tank but you do need a pump.
Steve L. From: Sprinklerforum [mailto:[email protected]] On Behalf Of Brian Harris via Sprinklerforum Sent: Thursday, September 12, 2019 8:08 AM To: [email protected] Cc: Brian Harris Subject: Pump? Or Pump & Tank? An insurance adjuster is telling a local packaging plant they need to update their current sprinkler system to meet the higher demands of product they are now storing. Adjuster is classifying everything as Unexpanded Group A plastics, on racks, max 25' storage, max 30' ceilings. One option allows .45/2500 + 500 hose using 11.2K heads. Running some quick numbers I'm around 1850 GPM @ 65 PSI. The latest flow test is only 84 Static, 60 Residual @ 1010 GPM. They've been told their gonna need a pump, I'm thinking they need more water as well. Thoughts? Brian Harris, CET BVS Systems Inc. Design Manager bvssystemsinc.com<http://bvssystemsinc.com/> Phone: 704.896.9989 Fax: 704.896.1935
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