One thought to keep an eye on: Many pressure reducing valves have a maximum pressure output of 165. If you design your original system to require more than that from the pump discharge, you may not get it once you put in the PRV (even though your pump discharge is much higher).
matt -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Matt Grise Sent: Monday, July 16, 2018 3:41 PM To: [email protected] Subject: RE: PRV after pump discharge control valve Just out of curiosity -how much boost are you starting with? What is the projected need in the future? Matt -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Tom Duross Sent: Monday, July 16, 2018 3:33 PM To: [email protected] Subject: RE: PRV after pump discharge control valve You start bending the listings when playing with different impellers in the field. In the old days these were listed assemblies and if you swap out an impeller, there does the listing. Some still hold that to be true. You might try a model series that meets both designs but with different pump ends. Keep the base and driver. A new pump end will have a new serial and new listing. Most pumps, electric split case anyway are usually pit tested as a pump end only before leaving the plant using one of their adjustable drivers. When you have an inline, the impeller and case are bolted to the motor, and diesels historically have most times been tested as a complete pump too. Not sure of the demands but this might be a question for you pump rep that maybe they can answer. TD Thank you Kyle, it means a great deal to me for you to say. I was curious about the application too, and saw a 1250 gpm, 2600 rpm with a range of 69 psi based solely on impeller diameter. Both impellers would need to be purchased and certified up front, and every one having signed off on the idea. I even imagined a note on the enlarged pump room plan, "mount future impeller and name plate in locked cabinet next to spare sprinkler cabinet". Brad _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
