The Grate Nozzles are designed to protect aircraft hangars and helipads. They are available with a 360°, 180°, or 90° discharge pattern and 26ʺ, 20ʺ and 555 mm widths to meet design requirements. The Grate Nozzles are AFFF foam discharge devices that deliver a uniform discharge pattern with a maximum spacing of 50ʹ x 25ʹ (15.2 m x 7.6 m). The nozzles are installed flush with the floor of the protection area within the trench drain. The companion trench drain grate is specially engineered to receive the Grate Nozzle® and serve as a cover for the drain trench.