Wood fire doors _-Sheng door industry (certified) _ Changzhi fire doors by Wanbailin district-Sheng distribution of stainless steel products. Wanbailin district-Sheng Stainless Steel Products Distribution Division (www.sxqsmy.net) is specialized in the "garage doors, Continental doors, fire doors, stainless steel doors, engineering doors, building doors, retractable door" of enterprises, companies adhering to the "integrity management, service intentions, "the idea, to provide you with the highest quality products and services. Welcome to inquire! Contact: Weijing Li. Fire doors on the basis of steel shutter on the drive components to transform high-grade fire doors, with fire appliances and other equipment, in order to achieve fire effects: fire the motor by fire electrical control box controlled by the transmission driving the reel so that shutter doors from closed, power outages can also be used to manually crank the fire door fire on the motor can be achieved manually. In the relative motion of the mechanical wood fire doors, instead of using the coupling wheel drive normally open fire doors, internal friction rail inlaid copper or nylon. Ideal for use or storage of flammable gases, such as volatile chemicals and other items with high firing of factories and warehouses or may occur fire explosion hazardous environments. Fire doors insulated by the classification: fire door (A Class): within the specified time, it could also meet fire doors fire integrity and insulation requirements. Part of the fire door (Class B): not less than the prescribed within 0.50 h, fire doors to meet fire integrity and insulation requirements. Non-insulated fire doors (Class C): within the specified time, to meet the requirements of the fire integrity of fire doors.