Door Closer is used to close the door at a controlled speed. It is a mechanical device that closes a door, in general after someone opens it, or after it was automatically opened. So it’s a self-closing device. Door closers are most commonly used on fire doors and main doors, which need to be closed in the case of fire to help prevent spread of the fire and smoke. It is very important for your safety. The door closer cannot be removed for safety reasons.
Types of Door Closers
There are two general types of door closers:
Manual door closer: It will close a door after it has been opened by hand. To limit the door's speed, manual door closers have a hydraulic (oil-filled) damper. A spring-type door closer usually shuts the door very fast, banging the door shut. This type of closer is used on a swing door.
Automatic door closer: Automatic door closer, also called door opener, opens the door itself, under the control of a push button, motion detector or other device. It then closes it as well, typically employing a motion or proximity detector to determine when it is safe to close the door.
Styles of Door Closer
Door closers are available in two styles.
Concealed door closer: Concealed door closers are concealed in the head frame over the door and are "out of sight and out of the way" types. Concealed closers are located within the door itself and are also hidden and protected. These closers work well on interior doors and are economical.
Surface mounted door closer: Surface mounted door closers located on the door is an important consideration. Surface mounted closers on doors along a corridor should be located on the room side of the door so that they are out of sight. On the other hand closers should be placed on the inside of exterior doors for protection and aesthetic.