Dry Pilot Actuator DP-1

The DP-1 actuates these automatic water control valves upon release of air (nitrogen) pressure. In the case of dry pilot actuation, air pressure is released due to the pilot sprinkler opening. For a double-interlock preaction system, air pressure is released from the piping due to the opening of an automatic sprinkler. When the actuator triggers, it permits water pressure to be released from the deluge or preaction valve differential chamber, thereby allowing the deluge or preaction valve to open.