FM Approved|UL Listed

The Victaulic® series 798 double pneumatic actuator (DPA) is a pneumatically actuated device that requires two-separate pneumatic activations in order to actuate a preaction fire protection valve. Series 798 can be used with the series 758 FireLock™ preaction valve or the series 769 FireLock™ NXT preaction valve for double interlock pneumatic/pneumatic systems. Air pressure loss in both the pilot line and system line are required to activate the DPA. Double interlock systems using the series 798 DPA do not require an electric release panel and provide an added level of security in areas with limited or unreliable electric power. The series 798 DPA allows the sprinkler and pilot line systems to operate with a low air or gas pressure of 10 psi/69 kPa, regardless of the supply water pressure. The series 798 is designed to actuate at 7 psi/48 kPa for both the pilot and sprinkler system. When air pressures have decayed to 7 psi/ 48 kPa in both systems the 798 will actuate, thus releasing the pressure from the piston charge line and actuating the sprinkler actuated valve in its intended manner. The low pressure required in the pilot and sprinkler systems allows both systems to have a very low moisture content while the 7 psi/48 kPa trip point will allow water to enter the sprinkler system and reach a greater number of heads more rapidly. The patented single unit design operates as a pneumatic double interlock device and greatly simplifies set up. The series 798 DPA is rated to 300 psi/2065 kPa working pressure and is tested and approved to be used on Victaulic® series 769 FireLock™ NXT preaction valves or series 758 fire protection valves.