The door closer is a spring-like hydraulic device on the head of the door. When the door is opened, it can be compressed and released to close the door automatically. It is like a spring door, which can ensure that the door can be closed to the initial position accurately and timely after being opened. The modern hydraulic door closer (hereinafter referred to as the door closer) began with a patent registered by the Americans at the beginning of the 20th century. It is different from the traditional door closer in that it achieves buffering effect by throttling the liquid in the door closer. The core design idea of the hydraulic door closer is to realize the control of the closing process so that various functional indicators of the closing process can be adjusted according to the needs of people.
Q: What's the application of door closer in our life?
A: Door closers are mainly used in commercial and public buildings, but they are also used at home. They have many uses, the most important of which is to close the door to limit the spread of fire and ventilation in the building.
Q: What is the classification of door closer?
A: Door closer types can be divided into external and internal top door closers, internal middle door closers, bottom door closers (floor springs), vertical door closers (built-in vertical door closers), and other types of door closers.
Q: How long is the service life of door closer?
A: The main quality problem of the door closer is whether it leaks oil because the door closer relies on the throttling of the fluid in its internal hydraulic system to realize the control of the closing process. Oil leakage means the failure of the hydraulic system, so the hydraulic system is the only standard to determine the service life of the door closer.