What did you tell him? My understanding is that you perform 2 tests: one with PLD enabled and another with PLD disabled.
Kyle Montgomery Aero Automatic Sprinkler Co. From: John Denhardt <jdenha...@firesprinkler.org> Sent: Thursday, May 22, 2025 10:39 AM To: sprinklerforum@lists.firesprinkler.org Subject: [External][Sprinklerforum] Re: Diesel fire pump flow testing I called and talked to Mike yesterday. I believe he is all set. Thanks, John John August Denhardt, P.E Vice President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 Are you a member with a technical question? Don't forget one of the most valuable resources that AFSA provides is Technical Reviews by our Technical Services Department. It’s like having an FPE on your staff. Visit www.firesprinkler.org/technicalreview<https://www.firesprinkler.org/technicalreview> to submit a question today! (Member login required.) On May 22, 2025, at 12:33, Walter Argeriou <walter.arger...@chesasprink.com<mailto:walter.arger...@chesasprink.com>> wrote: _________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to sprinklerforum-le...@lists.firesprinkler.org<mailto:sprinklerforum-le...@lists.firesprinkler.org> Call R.T. Stearns in Portsmouth N.H. 603-319-4171. They will absolutely know. Tell them Wally sent you. There will likely be a fee for call, but… They will know for sure. From: Mike Watts <mwa...@firetrol.net<mailto:mwa...@firetrol.net>> Sent: Tuesday, May 20, 2025 1:59 PM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org> Subject: [Sprinklerforum] Diesel fire pump flow testing External Email: ONLY open links/attachments from known safe sources Ok this is a new one for me. Have a diesel driven fire pump that has a PLD pressure limiting driver. When it comes to the annual flow test, how do I test this properly per Nfpa? Would this be tested as a variable speed pump per nfpa? I know on start up you disable the PLD to test and set relief valve pressure. On annual flow test the net pressure is low because RPMs are limited. Do I disable the PLD for the test to compare with pump data plate? OR use RPM correction formula with PLD on? OR test as a variable speed pump? Sorry first PLD pump for me this is cool stuff just want to make sure I test it right. Not finding much info on PLD PUMPS 8n nfpa. Ps called the manufacturer they could not help with annual testing requirements. Mike Watts Sprinkler Service Manager Firetrol Protection Systems 4616 W. Howard Lane, Suite 700 Austin, TX. 78728 512-687-0115 Office 512‐660-4411 Cell mwa...@firetrol.net<mailto:mwa...@firetrol.net>
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