What are the installation requirements for fire door closers?

A door closer is a spring like device installed on the door, which provides a buffering effect when closing the door and can accurately and automatically close the door to its initial position, avoiding rapid collisions and accurately controlling the door position. It is commonly used in access control systems. The application of door closers is still very common, from the decoration of new houses to the installation of company doors.

In addition, fire doors are generally installed at the entrance of safety passages. There is a type of normally closed fireproof swing door, which requires the installation of a fire door closer for firefighting purposes. As the name suggests, a fire door closer automatically closes when someone pushes open the door and runs out in case of a fire.

Next, let's explain the working principle and installation requirements of the fire door closer:

Working Principle:

1. Do you need an automatic door stop function after opening the door.

2. Buffer function, quickly opening the door to a certain position generates buffering, and the buffering force and range can be adjusted according to usage requirements; This function is used to prevent the door or lock from colliding with the wall when opening the door quickly with force, or to prevent people from losing weight and tilting forward to the ground during emergency evacuation when opening the door quickly.

3. Delayed slow closing, the door slowly closes at a constant speed from the maximum opening position, and can be infinitely adjusted according to requirements. Suitable for frequent and crowded places, especially hospitals, with doors and passages for the elderly, children, and disabled.

4. The closing force can be adjusted and installed on doors with a wide range of weights and widths, as well as in places with high closing resistance due to environmental factors. Random and stepless adjustment can achieve satisfactory closing force, especially in coastal cities, vehicles, and other places where closing resistance (door force) often changes due to wind influence.

5. The usage environment, fire prevention requirements, and anti freezing requirements for places under minus 35 ° C in winter.

The selection of door closers can usually be based on the manufacturer's product specifications, with different force sizes or adjustable force sizes to match the size and weight of different doors. The quality/size of the seven grades of test doors specified in the British standard BS EN 1154 (a recognized standard for door closer classification). The closing force of a door closer is usually specified as a value between 1 and 7, with a larger number indicating a greater ability of the door closer.

Installation requirements: ( The most commonly used door closer is the external door closer )

1. The door closer is installed on the hinge side and the side where the door opens. When installed in this way, the arm of the door closer protrudes outward, forming an angle of approximately 90 degrees with the door frame.

2. The door closer is installed on the side opposite to the hinge where the door is closed, usually with an additional bracket provided with the door closer mounted on an arm parallel to the door frame. This usage is usually used when the door closer is unwilling to be installed on an outward opening exterior door outside the building.

3. The door closer body is installed on the door frame instead of on top of the door, with the door closer on the opposite side of the door hinge. This usage can also be applied to exterior doors that open outward, especially those with only a narrow upper edge and insufficient space to accommodate the door closer body.

Additional explanation:

In addition to installing a door closer on the fire door, if it is a split fire door, a sequencer should also be installed.