Requirements for the use of door closers

The factors to consider when choosing a door closer include the width of the door, the frequency of opening the door, as well as the usage requirements and environment. The width of the door is the most important factor in choosing the model of the door closer. Usually, when the weight of the door is small, choose the model with less force, and vice versa. The frequency of door opening is closely related to the quality of the product. For frequently used occasions, the product should have good sealing performance and long service life.

1. Is it necessary to have an automatic door stop function after opening the door; 

2. Damping and buffering function - generates damping and buffering after quickly opening the door to a certain position, and the damping and 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 forcefully opening the door quickly, or to prevent people from losing weight and leaning forward and falling to the ground during emergency evacuation.
   

3. Delayed slow door closing - The door closes slowly and uniformly from the maximum position of the door opening, and can be adjusted steplessly according to requirements. Suitable for use in frequently accessed and crowded places, especially hospitals, with doors and passages for the elderly, children, and disabled.
   

4. Adjustable closing force - can be installed on doors with a wide range of weight and width, as well as in places with high closing resistance due to environmental reasons. Random and stepless adjustment can achieve satisfactory closing force, especially when used in coastal cities, vehicles, and ships where the closing resistance (force on the door) often changes due to wind influence.
   

5. Damping reset function temporary closing performance (vertical door closer) - When opening at any angle, closing the speed control valve should temporarily suspend the damping reset function.

6. Safe and fast over damping closing performance (vertical door closer) - When sudden external force is applied during the closing process at any angle, it should be able to safely and quickly close.

7. Environmental requirements for use - fire protection and fire protection requirements, as well as anti freezing requirements for places below -35 ° C in winter.