Victualics cut sheets show the spray pattern for QR and QR on the same sheet. It also shows that the pattern is a function of psi, not K factor.
http://static.victaulic.com/assets/uploads/literature/40.10.pdf Also from NFPA 25 2011 edition. 5.4.1.1 Replacement sprinklers shall have the proper characteristics for the application intended, which include the following: (1) Style (2) Orifice size and K-factor (3) Temperature rating (4) Coating, if any (5) Deflector type (e.g., upright, pendent, sidewall) (6) Design requirements 5.4.1.3 Special and quick-response sprinklers as defined by NFPA 13, Standard for the Installation of Sprinkler Systems, shall be replaced with sprinklers of the same orifice, size, temperature range and thermal response characteristics, and K-factor. AND MOST IMPORTANTLY FOR YOUR CASE... A.5.4.1.3 It is imperative that any replacement sprinkler have the same characteristics as the sprinkler being replaced. If the same temperature range, response characteristics, spacing requirements, flow rates, and K-factors cannot be obtained, a sprinkler with similar characteristics should be used, and the system should be evaluated to verify the sprinkler is appropriate for the intended use. With regard to response characteristics, matching identical Response Time Index (RTI) and conductivity factors is not necessary unless special design considerations are given for those specific values. Duane Johnson, PE Program Manager Division of the Fire Marshal (Contractor) Office of Research Services National Institutes of Health 301-496-0487 "Protecting Science - One Sprinkler at a Time" -----Original Message----- From: Greg McGahan [mailto:[email protected]] Sent: Friday, August 02, 2013 3:22 PM To: [email protected] Subject: Re: SR vs QR Guys - please understand - I knwo all this stuff and I have already done some of what you suggested. He is insisting on documentation stating that they are the same except for the response time. I have NO idea where he came up with this and I think he is confusing QR with EC, but I cannot get through to him. One of the manufacturers is sendign me a statement. Thanks for your help.... Greg On Fri, Aug 2, 2013 at 2:15 PM, Ron Greenman <[email protected]> wrote: > Pull out a calc sheet. Show him the k for the old head. Pick any other > number of heads with the same k, SR and QR Ask him to replace k in > each p[lace where it occurs with the k from the newly chosen heads and > see if he can make the numbers come out different. This is pretty basic math > theory: > 2+3=5 no mater who's 2 you use. > > > On Fri, Aug 2, 2013 at 12:09 PM, Steve Mackinnon <[email protected] > >wrote: > > > Have you tried contacting the manufacture and asking for a letter? > > > > -----Original Message----- > > From: [email protected] [mailto: > > [email protected]] On Behalf Of Greg > McGahan > > Sent: Friday, August 02, 2013 2:44 PM > > To: [email protected] > > Subject: SR vs QR > > > > Does anyone have documetnation in an easy to read format that shows > > the difference in SR SSP/U and QR SSP/U heads is ONLY the response > > time and that all other aspects are identical - spray pattern, > > spacing > requirements, > > deflector distance etc? > > > > Thanks, > > Greg > > > > -- > > Greg McGahan > > Living Water Fire Protection, LLC <http://www.livingwaterfp.com> > > 1160 McKenzie Road > > Cantonment, FL 32533 > > 850-937-1850 > > fax 850-937-1852 > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org > > > > > > -- > Ron Greenman > Instructor > Fire Protection Engineering Technology Bates Technical College > 1101 So. Yakima Ave. > Tacoma, WA 98405 > > [email protected] > > http://www.bates.ctc.edu/fireprotection/ > > 253.680.7346 > 253.576.9700 (cell) > > Member: > ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC > > They are happy men whose natures sort with their vocations. -Francis > Bacon, essayist, philosopher, and statesman (1561-1626) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org > -- Greg McGahan Living Water Fire Protection, LLC <http://www.livingwaterfp.com> 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 fax 850-937-1852 _______________________________________________ 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
