In the complex underground working environment of mines, the Fire Barrier Dual Door is a key safety device integrating "fire isolation" and "passage control." It not only assumes the fire fighting responsibility of blocking the spread of fire and controlling the flow of smoke but also acts as a controllable barrier for tunnel passage, achieving a precise balance between ensuring mine production safety and operational efficiency.
link:https://www.rlycn.com/mining-ventilation-system/mine-doors/dual-purpose-fireproof-barrier-door.html