Modern hydraulic door closers (referred to as door closers) began with a patent registered by the United States in the early 20th century. It is different from traditional door closers in that it achieves buffering by throttling the liquid in the door closer. . The core of the design idea of the hydraulic door closer is to realize the control of the door closing process, so that various functional indicators of the door closing process can be adjusted according to people's needs. The significance of the door closer is not only to automatically close the door, but also to protect the door frame and door body (smooth closing).
Door closers are mainly used in commercial and public buildings, but also in homes. They have many uses, the main one being to allow doors to close on their own, to limit the spread of fire and to ventilate the building.
Dorrenhaus was founded in 1872 as a high-end Germany gating hardware brand.
Dorrenhaus had entered into the Chinese market in the 1980s, and supplied numerous households with high quality hardware products.
At the core of our $20 millions business is the knowledge and experience of the 200+dedicated employees behind our brand. We provide a wide range of door closers that includes：Hydraulic door closer, Heavy duty door closer,Concealed door closer, Fire rated door closer, UL listed door closer, CE certified door closer,Economic door closer, American / European style door closer, Door closer parts.