We have never used one for an entire facility unless we could do it with 2-1/" prv. The relief valves really can create a lot of problems and we have seen them not work at all and no one know for long periods of time.
You can get 500 gpm out of 2-1/2" PRV so we try to stay with them. Are you talking about a PRV or a Clay Valve being unreliable? PRV's usually relax over time. That is why the requirement is to limit the pressure to 165 psi on the system side of the valve. Living Water Fire Protection, LLC 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 Fax: 850-937-1852 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Todd Williams - work Sent: Wednesday, March 14, 2007 12:19 PM To: [email protected] Subject: RE: pump tricks >Greg McGahan wrote... > >We do not use Relief valves any more. We rely on the proper rated fittings >and Pressure Reducing Valves. The relief valves we have seen do not operate >quickly enough to save the system from being exposed to higher pressure and >they discharge so much water that they destroy property. > > Interesting. I am working on a project where the relief valve was removed and replaced with a PRV. The PRV has become such a nightmare since we can't reliably set it and just don't trust it to work right, that we are replacing it with a standard relief valve. What is you experience with PRVs over time? What kind of maintenance are you doing with them? Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut 860-535-2080 www.fpdc.com _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
