A door closer is a device commonly seen in commercial and public buildings. As the name suggests, it enables a door to close whenever it opens. Most people would not realize the importance of this simple device not until a problem already arises. Before we fully understand what it can do to our homes or business buildings, we must first know the basics.

Types of Door Closers. Door closers can come in different types, depending on what you need. They can be concealed in frame and concealed in floor or surface mounted. Closers that are surface mounted have four different types. These include the regular arm, top jamb mounted, slide track arm and the parallel arm. Overhead type closers are mostly surface mounted, even though there are a lot of manufacturers that offers concealed models also like Norton 7900 overhead concealed and the Rixson 27 series. These are mounted inside of a pocket of the door frame though sometimes they can also be mounted in the floor under the pivot area directly and are concealed completely. The surface mounted ones are those with the small boxes attached on the door’s top corner. The arms that are jointed are the ones extended from the top level of the box on to the frame where this is bolted in.