With so many automatic door closer models on the market, don't know how to choose? This why we need to understand the key points of automatic door closer selection.
1. Before purchasing an automatic door closer, you should consider: door weight, door width, door opening frequency, usage requirements and usage environment, etc. Common doors include fire doors, wooden doors, aluminum alloy doors, glass doors, steel doors, etc. Generally, the door weight is small, and the model with small force is required. The automatic door closer is required to have better sealing performance and no oil leakage. The key is dynamic sealing. The frequency of door opening is a factor closely related to product quality. For occasions with frequent use, it should be required that the product has better sealing performance and long service life. Only in this way can ensure long-term and normal use after installation, reduce the workload and cost of maintenance and update, At the same time, you can also enjoy the convenience by automatic door closer brought to life.
2. When purchasing automatic door closer, the opening resistance should be considered .
For building exterior doors, opening resistance is a very important function. The automatic door closer should not only prevent the large thrust of people from over-opening the movable fan, but also prevent the door from being damaged due to excessive opening of the movable fan when it is opened by strong wind. Generally speaking, only automatic door closers have this function. Lag door closing is a special function, the purpose is to make the movable fan stay in the open position for a period of time and then close the door. This function is very important in occasions where children and the elderly pass through.
3. When purchasing automatic door closer, the closing force should be considered .
The adjustable closing force is a sign of a good automatic door closer, which can precisely adjust the closing force level. Closing force is usually a specific performance of a certain model of automatic door closer, but sometimes the closing force can vary. For example, when the wind is strong in winter, the outer door may need to have a large closing force, and when the wind is small in summer, the required closing force is small, making it easier for people to open the movable fan.
4. The quality of the automatic door closer should be considered .
The key quality issue of the automatic door closer is whether it leaks oil, because the automatic door closer completely relies on its internal hydraulic system to control the door closing process. Oil leakage means the failure of the hydraulic system, so the hydraulic system is the decision to use the automatic door closer. The only standard for longevity. The main reason for oil leakage is that the bearing transmission device has a gap due to wear, which reduces the sealing effect. Therefore, the quality and precision of the material, heat treatment and machining of the bearing transmission are the key to the problem. In fact, the quality of door and window hardware and even all building hardware is related to the basic industrial level of the place of production. The shell of the automatic door closer has two types: cast aluminum and cast iron. The size, quantity and post-processing of the shell blank are also one of the key factors affecting the quality of the automatic door closer. In addition, in order to improve the life of the bearing transmission, some manufacturers use ball bearings to improve wear resistance.
Automatic door closer used for fire doors shall also requirements of — < Fire Test >
