The Viking VSH1230 Multi Zone Fire Extinguishing System is equipped with a pneumatic release device (PAE). The pilot cylinder of these systems is activated electrically when a fire is detected. The CO2 contained in the pilot cylinder flows through the pilot line to the pneumatic actuators, mounted to the selector valves, and opens them. Each selector valve has a small pilot valve attached. This ensures that only the selector valve assigned to the associated protected enclosure opens and the agent discharges into the corresponding pipe. This prevents the agent from flowing into protected enclosures that are not affected by fire.