Fire shutter doors use mainly for large supermarkets (hypermarkets), shopping malls, large specialty materials market, large hall, factories, warehouses, and other public places have fire protection requirements. When the fire broke out, fire shutter doors fire central control under the control of the system, according to pre-set the program to automatically put down (downward), so as to prevent the flames from spreading to other areas of action retractable shutter doors, for the implementation of fire protection for valuable time. Under normal circumstances, a large building in accordance with the provisions of the National Fire Protection Act configured central fire control system. When a fire occurs, smoke sensors installed in the roof (the smoke) first received a smoke signal, an alarm to the central control system high speed shutter doors, fire after the central control system by identifying the power is turned on fire shutter fire in your area so that the fire area fire shutter speed by a certain downside. When the shutter down to about 1.5 meters from the ground position, stop down, in order to facilitate evacuation and evacuate personnel. Fire doors in the middle of the residence after a certain time, and then continue down the garage shutter doors, until close. Fire shutter speed downlink and intermediate dwell time can be adjusted during installation. Fire shutter doors central control system is not equipped with fire in some cases, building, fire shutter doors fire shutter doors only by means of fire control electrical box to run the program to achieve prescribed fire fire shutter doors. In this case, when the fire broke out, the smoke alarm signals received by the sensor is directly transmitted to the fire shutter doors of fire control electrical box. In the case of a power outage shutter doors, only by pulling the chain will fire shutter doors down. Fire shutter doors equipped with a manual, only one-way down, you can not upgrade. Higher production requirements fire shutter doors, which requires that the entire system can withstand a certain time of about 1100 ° high temperature test, fire-resistant fire shutter doors are the main indicators of fire shutter doors. GB14102-93 steel fire shutter door general technical conditions specified in the refractory period of the four fire rating. Stainless steel shutter doors, shutter doors Tatung, the security provided by the sun rose Xin Xin Taiyuan sun rose Security Technology Limited. Taiyuan Xin sun rose Security Technology Co., Ltd. (www.xrsznafkj.cn) strong, credible, in Taiyuan, Shanxi metal door industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xin sun rose into the brilliant security and you work for a better future!