With all that said, how will one PRV at the pump prevent high pressures at the wet systems and allow higher pressure for the Quell system when all are fed from the same loop attached to the same pump discharge?
Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dewayne Martinez Sent: Wednesday, July 09, 2008 2:06 PM To: [email protected] Subject: RE: Pressure reducing valve location for a fire pump I will have to find out more from the salesman. He is the one who met with the Quell representative. The Quell systems will be fed off the UG loop supplied by the fire pump. I thought the purpose of the PRV was originally to provide protection to my wet systems in the warehouse but some of these systems are fed off the UG loop also. The only reason I would see to use a PRV is that the Quell system will require a flat curve close to 175psi. Guess I need to find out more. Thanks, Dewayne -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, July 09, 2008 11:50 AM To: [email protected] Subject: RE: Pressure reducing valve location for a fire pump OK, I'm a bit confused so help me out. You have a potential project that will require high pressures which are yet undefined, so you are installing a pump with a total discharge pressure of ????. Is the purpose of the pressure reducing valve to protect other standard 175psi rated systems from the over pressure? Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dewayne Martinez Sent: Wednesday, July 09, 2008 12:36 PM To: [email protected] Subject: RE: Pressure reducing valve location for a fire pump I have been told that there will be a future freezer building that will have a Quell system which requires the high pressures. This is a new installation. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, July 09, 2008 11:28 AM To: [email protected] Subject: RE: Pressure reducing valve location for a fire pump What's the purpose of the reducing valve in this application? Is this a new pump, existing pump, what are the design considerations warranting this? Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dewayne Martinez Sent: Wednesday, July 09, 2008 12:07 PM To: [email protected] Subject: Pressure reducing valve location for a fire pump I have to install a pressure reducing valve on the discharge side of the fire pump. I know from past discussions that if standpipes are present, the valve must be installed after the last control valve for the fire pump to satisfy NFPA 14. What if this is a large warehouse falling strictly under 13? Could it be placed between the pump discharge and check valve (just like pressure relief valve on a diesel FP) and sized per minimum relief valve in 2-20 (NFPA 20 99ed)? I have a 2000gpm pump with a 8" discharge flange and would like to get a 8" pressure reducing valve to work instead of a 10in (size required for discharge pipe) to save some money. I checked the spec sheets and the 8" valve can handle the flow at 150%. Thanks, Dewayne _______________________________________________ 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) _______________________________________________ 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) _______________________________________________ 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)
