1. The requirements and choices of door closers must be met. The door closer products must meet the national standard GB9305-88. The door closers used for fire door applications should also comply with the requirements of GA93-1995 "Fire Door Door Closer Test".
2, the weight of the door and the width of the door is the most important factor in choosing the type of door closer. Common doors have fire doors, wooden doors, aluminum doors, glass doors, steel doors and so on. Usually the weight of the door is small, and the model with less power is selected, and vice versa.
3. The opening frequency is a factor closely related to the quality of the product. The use environment of the door should also be considered. For occasions with frequent use, the sealing performance of the product should be good and the service life should be long.