The weight of the door is the second aspect of the selection of the force level of the door closer. In our fire door design, the weight of the door should be borne by the hinge, and the door closer itself does not bear the weight. However, in actual applications, the hinge will undergo elastic deformation after bearing the weight of the door leaf, which will cause the door to sag and rotate at the same time to increase the frictional force, which will affect the normal use of the door closer. In the EN standard, there is no definition of the weight level of door closers. This city considers that the door closer itself is not load-bearing; however, in view of the impact of the weight of the door in actual use, the weight level of door closers of different force levels The recommended weight of the door is given as a reference value.
