Abort Gate/Abort Damper : A device for the quick diversion of material or air to the exterior of a building or other safe location in the event of a fire
NFPA 654 Standard for the Prevention of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids, 2006 ed. (Std: Prev of Fr and Dust Explo from the Mfg, Procss, and Hndlg of Comb Particulate Solids - Amer) {337 NFC}