TECHNICAL DATA
MODEL VXD SINGLE-
INTERLOCKED PREACTION
SYSTEM WITH ELECTRIC
RELEASE
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
Page 4 of 13
Form No. F_051820 21.01.01 Rev 21.1
Figure 3: Fire Conditions
5.2 In fire conditions:
When the detection system operates, the system release control panel activates an alarm and energizes the normally closed
solenoid valve (E) open. Pressure is released from the priming chamber faster than it is supplied through the restricted orifice.
The Deluge Valve diaphragm opens to allow water to flow into the system piping and alarm devices, causing the water motor
alarm and/or water flow alarms connected to the alarm pressure switch (not shown) to activate. Water will flow from any open
sprinklers and/or spray nozzles on the system. When the deluge valve operates, water is drained from the PORV inlet. When
the 10:1 differential is overcome, the push rod opens, allowing the prime water to drain. If a release resets, priming water will
continue to escape through the PORV, allowing the deluge valve to continue to operate until the system is reset. The Deluge
Valve can only be reset after the system is taken out of service, and the outlet chamber of the deluge valve and associated
trim piping are de-pressurized and drained.
A
F
D
Supply
E
B
C
+
_
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