Single Interlock Type

A single-trip arrangement for a pre-action sprinkler system; the pipe line is kept filled with air or nitrogen, and water passes through the valve only when the fire detector sends a signal. Since accidental damage to the sprinkler head alone does not cause water flow, it is preferred in water-damage-sensitive areas. It consists of UL/FM approved components; it is installed in archive rooms, high-ceiling warehouses, and electronic equipment areas.