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.

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1¡¢ Requirements for rolling machine of fireproof rolling shutter door:

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£¨1£© Appearance and parts

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

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

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

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

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£¨2£© Basic performance

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

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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.

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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.

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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.

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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.

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2¡¢ Fire resistance rating of fireproof rolling shutter door

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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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The above is for you to introduce the fire shutter door related content, if you want to know more, you can pay attention to us, our company perennial distribution installation of various types of rolling shutter door, garage door, if necessary, please contact us, will let you satisfaction.