Fire Door Closer Method
Source: | Author:business-101 | Published time: 2017-03-28 | 819 Views | Share:
　　Generally, the fire doors installed in the safety passages are mostly normally closed type fire doors. The fire doors must be equipped with door closers for fire protection requirements. The main function of the door closer is to automatically close the door, that is to say, after the fire occurs, the door will automatically close after the door is opened to prevent the fire from spreading. Below, Zhongwomen Industry will introduce you to the installation and working principle of the door closer.

　　Practical installation of fire door closers method by fire door manufacturers
　　First, the installation method of the external door closer
　　1. The door closer is mounted to the side of the hinge and the side of the door. When the door closer arm thus mounted protrudes outward, it is approximately 90° to the door frame.
　　2. The door closer is mounted on the opposite side of the hinge from the side of the hinge. Typically, an additional bracket provided with the door closer is mounted to the arm parallel to the door frame. This type of usage is usually used on exterior doors that are unwilling to install the door closers outside the building.
　　3. The door closer body is in turn mounted to the door frame instead of the door, and the door closer is on the opposite side of the door hinge. This usage can also be used for exterior doors that open outwards, especially those with a narrow upper edge and no wide enough space to accommodate the door closer body.
　　Second, the working principle of the door closer
　　1. Is it necessary to have an automatic door stop function after opening the door？
　　2, buffer function, quickly open the door to a certain position after the generation of buffer, and the buffer strength and range can be adjusted according to the use of the requirements; this function is used to prevent the door or lock from hitting the wall when the door is quickly opened, or to prevent people from being in emergency escape When you open the door quickly, you lose weight and tilt forward to the ground.
　　3. The time delay is slow to close the door. The door is slowly closed from the maximum position of the door opening, and can be adjusted steplessly according to the requirements. It is suitable for use in places where people enter and exit frequently and in many places, especially in hospitals, and there are doors and passages for the elderly, children and disabled people.
　　4. The closing force can be adjusted. It can be installed on different doors with a large door weight and wide door width, and a place with high door closing resistance due to environmental reasons. Festive stepless adjustment can achieve satisfactory closing power, especially in places where coastal cities, vehicles and ships are affected by wind and the closing resistance (force of the door) changes frequently.
　　5, the use of the environment, fire and fire requirements and anti-freeze requirements in places under minus 35 ° in winter.
　　Usually, the choice of the door closer can be matched with the size and weight of different doors according to the manufacturer's product specification parameters, according to different strengths or adjustable forces. The quality/size of the seven grade test doors specified in British Standard BS EN 1154 (a recognized standard for door closer classification). The closing force of the door closer usually specifies a value between 1 and 7, the greater the number, the greater the ability of the door closer.
　　In addition to installing the door closer on the fire door, if the sequencer is installed for the fire door, there is another type of device. It means that there must be a certain order in order to prevent the two doors of the fire door from closing, so as to prevent the fire door from being unmasked.
　　The above is the installation and working principle of the door closer introduced by Zhongwomen Industry. I hope that it will help you to choose the door closer.