Door closers can be divided into different categories. A distinction is framed door closers, floor springs and overhead door closer. The assembly of the floor door closer a cement box in the floor, usually screed is poured. The door leaf is connected to the lower hinge on the axle of the door closer. An important argument for the decision to use ground door closers is that they can fit almost invisibly in the construction conditions.

The overhead door closer is the most used door closers. This is attached to the door fall with the help of mounting plates or angles. This makes it possible to install the overhead door closer to retrospectively at the door. The design of the closing panels has now been designed so that the door closer fit perfectly into the existing architecture. When mounted on fire and smoke doors is important to note that the door has to be authorized in conjunction with the door closer.

An increasingly important role played by the invisible overhead door closer. This can be integrated invisibly into the door frame and the door. A retrofit to an existing door and is very expensive and often impossible, because the invisible overhead door closer is used primarily for new doors. In all the overhead door closer, repair and service costs through the free-access and easy-to-exchanging components kept as low as possible. Frame door closers are fully integrated and invisible to the frame and door construction. These are mainly used in swinging doors to your application. The force for closing the door will be created in the spring when you open a tense and that the door closes again. In order to give the energy is controlled, closing speed, latching and opening limit are hydraulically limited. Some door closers are to be fitted to fire and smoke doors. It is important to note that this one Approval for the installation of fire and smoke doors have. This follows from the technical documentation of the manufacturer. Often they are also part of a hold-closing devices as approved in conjunction with a device. This authorization is granted by the German Institute for Building Technology).