As an essential type of door for the major shops, shopping malls and garages, rolling shutter doors are deeply loved by everyone. Because of its unique function, fire shutter door plays an important role in its post. The most important part is rolling shutter machine, which has certain requirements. Next, let's take a look at the requirements of the rolling machine of the fire shutter door and the fire resistance rating of the fire shutter door.

一、防火卷帘门的卷门机要求：

1、 Requirements for rolling machine of fireproof rolling shutter door:

(一)外观及零部件

（1） Appearance and parts

1、卷门机的外壳应完整，无缺角和明显裂纹、变形。

1. The shell of the door rolling machine shall be complete without missing angle, obvious crack and deformation.

2、涂覆部位表面应光滑，无明显气泡、皱纹、斑点、流挂等缺陷。

2. The surface of coating part shall be smooth without obvious bubble, wrinkle, spot, sagging and other defects.

3、卷门机的零部件不应使用易燃和可燃材料制作。

3. The components of the door rolling machine shall not be made of inflammable and combustible materials.

4、卷门机的操控设备应有利于使用工作人员操控。

4. The control equipment of the door rolling machine should be convenient for the operating staff.

(二)基本性能

（2） Basic performance

1、卷门机的额定输出扭矩应符合设计要求。生产方应提供检验合格证明。

1. The rated output torque of the door rolling machine shall meet the design requirements. The manufacturer shall provide the inspection certificate.

2、卷门机刹车抱闸应可靠，刹车力不可小于额定值输出扭矩下配重后的1.5倍，滑行位移不可超过20mm。

2. The brake of the door rolling machine shall be safe and reliable. The braking force shall not be less than 1.5 times of the counterweight under the rated output torque, and the sliding displacement shall not exceed 20 mm.

3、 卷门机应具备手动式使用装置，应灵便、可靠，安装位置应有利于操作。使用手动式操作设备操纵防火卷帘门启、闭运行时，严禁出现滑行碰撞现象。

3. The door rolling machine shall be equipped with manual operation device, which shall be convenient and reliable, and the installation position shall be convenient for operation. When using manual operation equipment to operate the fire shutter door to open and close, sliding collision is strictly prohibited.

4、卷门机应具备电动式启闭和借助防火卷帘门总重量恒定下滑的功能性，电动式启闭和自重下滑速度应符合6.4.5的要求，启动防火卷帘门自重下降的臂力不应大于70N。

4. The rolling door machine shall have the function of electric opening and closing and constant sliding of the total weight of the fireproof rolling shutter door. The speed of electric opening and closing and self weight sliding shall meet the requirements of 6.4.5, and the arm force for starting the self weight decline of fire shutter door shall not be greater than 70N.

5、卷门机应具有全自动限位装置，当防火卷帘门启、闭上、下限位时，能全自动终止，其多次重复精准定位误差应低于20mm。

5. The door rolling machine shall be equipped with automatic limit device, which can automatically terminate when the fire shutter door is opened and closed to the upper and lower limits, and its repeated accurate positioning error shall be less than 20 mm.

二、防火卷帘门的耐火等级

2、 Fire resistance rating of fireproof rolling shutter door

防火卷帘防火性能的分级尚无标准，根据卷帘门的防火级别大体可分为：特级、、乙级、丙级四种，各级别耐火时间各不相同，目前我国执行的标准：特级防火卷帘门的耐火时间不小于3小时，耐火防火时间不小于1.5小时，乙级不低于1小时，丙级不低于0.5小时，根据其安装环境的重要性来确定安装什么级别的防火卷帘。

There is no national standard for the classification of fire performance of fire shutter. According to the fire rating of rolling shutter door, it can be roughly divided into four categories: super class, class A, grade B and grade C. The fire resistance time of each level is different. At present, the standard implemented in China is that the fire resistance time of super grade fire shutter door is not less than 3 hours, that of Grade A is not less than 1.5 hours, that of grade B is not less than 1 hour, and that of grade C is not low 5 hours, according to the importance of the installation environment to determine what level of fire shutter installation.

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