I'd say Special Application, usually a larger K Factor that reduces pressure demand compared to what you might ordinarily used.
Think of a K25 ESFR's ability to reduce pressure requirements to eliminate the need for a fire pump since you only need 15 PSI instead of 75. George L. Church, Jr., CET Rowe Sprinkler Systems, Inc. PO Box 407, Middleburg, PA 17842 877-324-ROWE 570-837-6335 fax g...@rowesprinkler.com -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Cesar Lira Sent: Thursday, September 20, 2012 11:25 AM To: sprinklerforum@firesprinkler.org Subject: RE: Sprinkler design for class IV rack storage Hi Scot. Could you explain what do you mean with Ergo named S.A.? C.L.R. -----Mensaje original----- De: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] En nombre de å... .... Enviado el: jueves, 20 de septiembre de 2012 03:34 a.m. Para: SprinklerFORUM@firesprinkler.org Asunto: Sprinkler design for class IV rack storage Andrei: You might be able to avoid a pump if you go in-rack. but your client probably will experience a broken in-rack sprinkler in their future operations, and be quite upset. Special application sprinklers usually offer an advantage by reducing the demand for pressure-volume work (i.e. pump size), ergo their name "SA". Control-mode, ceiling-only will probably demand a bit more pressure-volume work from your source, but the sprinkler might be a bit less expensive that SA. Since you are attempting to design a sprinkler system without having to replace a fire pump, it appears you will need to pursue each option and see what the demand is, relative to the supply your pump offers. There are slight improvements that can be made to pump performance, based upon changing out impellers, but that is only if the demand is close to the pump's current supply capacity. There is no single 'best' answer. You, as designer need to weigh your variables and make a judgment (and describe the rationale) for the stakeholders as to why you choose what you chose. scot deal excelsior fire -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachment s/20120920/1bef6c88/attachment.html> _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
