We need a manufacturer’s rep on line. But if you get out their book they only cast a few pump casings. They engineer a wide variety of impellers to go with a casing and usually several different power plants.
I’d been told in the past that final machining of the impeller was after order. Maybe the has changed as suppression-type sprinkler systems have become more common. Maybe there are a very few super fitters out there who rebuild a pump, have an electricians card, and millwright skills. Maybe. When the engine or motor has problems, or the pump needs to be opened up its usually written up and a specialist comes in and works on it. Manufacturer’s pre-test and certification. Hmm. Don’t know. Not redone when you replace original impeller with a like impeller. But if you open it up that far you’ve already triggered a new acceptance test. Best. Bruce Verhei > On Jul 16, 2018, at 13:41, Matt Grise <[email protected]> wrote: > > 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
