Technical data

Page 47
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [e-mail]
February, 2010
PREACTION SPRINKLER
SYSTEM
The force pulling on the lever arm depresses a schrader valve stem, sending the pressure above the dia-
phragm faster than it can be replenished through the small hole in the diaphragm (Figure 23). The pressure
under the clapper lifts it, allowing the release line pressure to be vented through the drain outlet (Figure
24).
The unit is self-resetting when operated as a rate of rise device. The unit may also be equipped with a
fixed temperature release that will release the system at a preset temperature regardless of the rate of
temperature increase. The release can be mounted at any angle and there is no limit on the number of
them that can be on a single line (Figure 25).
†NFPA 13-2007 edition.
Figure 24
Figure 25: Model C-1 Thermostatic Release