Extended coverage dry heads do have different K-factors depending on the length. See the Tyco DS-2, for example.
Benjamin Young On Thu, Aug 15, 2013 at 11:13 AM, Roland Huggins <[email protected] > wrote: > Ahh but we are intermixing reality and assigned methodology. With all the > averaging to define the K-factor, applying rectangles to circular discharge > patterns, differences in losses in fittings, etc etc etc despite using a > very precise calculation equation, we still are making a rough estimate > that works very well at ensuring fire control. > > Just like the cut-sheet shows, the nominal K-factor is used. > > Roland > > > Roland Huggins, PE - VP Engineering > American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives > Dallas, TX > http://www.firesprinkler.org > > > > > > On Aug 15, 2013, at 6:47 AM, Steve Leyton <[email protected]> > wrote: > > > I would check with the manufacturer of the specific sprinkler you are > proposing to install. Dry sprinklers have internal moving parts and the > designs aren't necessarily the same between different ones; if there's a > measurable added friction loss in the barrel from flow over and through the > various tube and spring assemblies, I'd wager they've got the net K or > pressure loss available. > > > > Steve Leyton > > _______________________________________________ > 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
