30.82
Series 769 FireLock NXT™ Preaction Valve 3
Pneumatic/Pneumatic Release:
The pneumatic/pneumatic system uses one Series 798 Double
Pneumatic Actuator to control the Series 769 Actuated Valve. The system control valve will operate only
when there are sprinklers activated in both the pilot line and the sprinkler system. If a sprinkler is activated
in either the pilot line or the sprinkler system (without an accompanying open sprinkler in the other system)
the system control valve will not operate. Since the pneumatic/pneumatic system uses two separate
pneumatic detections, the need for an electric release panel is eliminated. In all cases, an open sprinkler
will cause low-pressure supervisory alarm.
Note: All Series 769 valves are approved and listed for
double interlock pneumatic – electric with the Series 767. It is also approved for double interlock
and pneumatic/pneumatic double interlock configurations with the Series 798.
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