The biggest feature of this series of doors is good thermal insulation and fast running speed, and all of them are equipped with safety gratings as standard. In the process of opening and closing the door, there is no contact and friction between the door panels. It is a quick door with heat preservation, energy saving, sealing, high efficiency, wind resistance and environmental protection. The maximum opening speed can reach 1.5 meters per second. The door panel is made of 0.8mm thick double-layer stretched aluminum plate, and the middle insulation material is filled with polyurethane foam. The cross section is designed as a broken bridge thermal insulation structure, which has the characteristics of good thermal insulation, light weight, high strength and impact resistance, and the wind resistance level is ≤12. This door type is suitable for the fast passage of indoor and outdoor logistics and production The adoption of this door type can save energy loss caused by air circulation fo