Fire shutter doors, like to play with the role of a firewall separating the level of fire protection, which consists of curtain panels, seat, guide, support, reels, boxes, control box, roll door stopper, lintels, manual speed up switch devices , buttons, switches and protective devices such as 13 parts, usually installed in the inconvenient parts separated by a firewall. Such as: open elevator hall, escalators, department store's large business hall, exhibition hall of the exhibition floor, and building a larger hole can notFire doorsWindow position. Fire shutter doors in the building, to make fire separated by the vast number of applications.

   But the national standard GB14102 on iron Chain of the fire resistance rating, were not asked back the fire resistance test measuring surface temperature, surface temperature rise not to fire back as the time to determine the conditions of fire, appeared on the market in recent years, steam fog type steel fire shutter, evaporative steam fog-type steel fire shutter, etc., by "high regulation" requirement, when used as a fire partition separating the components, it must fire back surface temperature rise as the fire resistance of the determination conditions. To determine the difference between these two different conditions of the fire shutter fire resistance of the classification, classification in the fire curtain before the introduction of national standards, "high regulation" management experts recommended that: will be the national standard "door and shutter resistance test method "GB7633 resistance test, to include the back surface temperature fire conditions in the determination of requirements, fire resistance ≥ 3.0h, called super fire shutter, all in the fire resistance test is not to fire back surface temperature l determine the conditions referred to as the ordinary fire shutter doors.

Author: River supernatural power chain Co., Ltd
website: www.shenlichain.com
main product: swing chain、iron chain