Duty Folding Door is specially designed for garages, factories, logistics warehouses, industrial parks and cold chain workshops. The door panel is made of aluminum alloy frame inlaid with explosion-proof glass, transparent carbonate (PC polycarbonate sheet) or high-density polyurethane foam insulation board. The inner and outer color steel plates are embossed, which can insulate and heat, reduce noise and sound, effectively prevent the exchange of cold and hot air, and is energy-saving and environmentally friendly. The door panels slide vertically upwards in sections and flip along the track to be stored above the door opening, not occupying indoor or outdoor passage space. Equipped with a professional industrial door motor control system, it supports multiple opening methods such as remote control and button linkage, operates smoothly and has low opening and closing noise. A transparent lighting window can also be optionally equipped to facilitate the observation of the working conditions inside and outside the door. It is equipped with multiple safety protection devices such as airbags, infrared photoelectric protection, steel wire rope breakage prevention, and spring breakage prevention to prevent people and objects from being pinched. The door frame and track are made of hot-dip galvanized steel structure, which is rust-proof and durable, and suitable for various industrial environments such as dampness and dust.