Viking ESFR Technical Data Manual page 9

March 7, 2008 Page 9
ESFR PRE-PRIMED SINGLE
TECHNICAL DATA INTERLOCK PREACTION
COLD STORAGE SYSTEM
The Viking Corporation, 210 N Industrial Park Road, Hastings MI 49058
Telephone: 269-945-9501 Technical Services 877-384-5464 Fax: 269-945-4495 Email: techsvcs@vikingcorp.com
Typically, when a partial branch line is required in the hydraulic calculations, the sprinklers closer to
the cross main will be used, as shown above. The calculation of the closer sprinklers will result in less
friction loss and a smaller pressure demand on the branch line. At the cross main, a K factor for the
branch lines will need to be determined. The lower pressure requirement will result in a larger K fac-
tor and thus require more water on the partial branch line, typically making the closer sprinklers more
demanding.
Figure 5 - Example of Remote Area for Darcy-Weisbach Calculation
Center Feed Tree