Almost all automatic door closers have two levels of adjustable closing speed and locking speed. The locking speed is adjusted according to the hardness of the lock tongue to lock the movable leaf without generating unnecessary impact force on the door frame. The adjustment of the full closing speed is not affected by the locking speed.

For the exterior door of a building, the opening resistance is a very important function. The automatic door closer should not only prevent the movable leaf from being over-opened by the large thrust of the person, but also prevent the movable leaf from being over-opened when encountering strong winds and causing damage to the door body. Generally speaking, only high-end door closers have this function. Lag closing is a special function, the purpose of which is to make the movable leaf stay in the open position for a period of time before closing the door. This function is very important in occasions where children and the elderly pass through. The adjustable closing force is a sign of high-end automatic door closers, and high-end door closers can accurately adjust the closing force level. The closing force is usually a specific performance of a certain type of door closer, but sometimes the closing force will also change. For example, in winter when the wind is strong, the exterior door may need a larger closing force, while in summer when the wind is small, the required closing force is smaller, making it easier for people to open the movable leaf.

We often see automatic door closers in public places. Generally speaking, it is unlikely that we will use automatic door closers in our home decoration. However, we should still understand the top ten brands of automatic door closers and the maintenance tips of automatic door closers. I hope that the content introduced by the editor today can help you.