The arm tail rests against the door and a spring that is twisted by the user opening the door closes the door by returning to its pre twisted shape.
Arm type door closer.
Commercial door closers are effective at controlling the opening and a lot of the functionality comes from the arm attached to the closer.
The main function of the arm is to turn the pinion.
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Door closers with a regular arm will be mounted on the pull side of the opening.
The most common arms are the regular arm and parallel arm.
The universal hardware heavy duty aluminum the universal hardware heavy duty aluminum commercial door closer is suitable for aluminum wood and hollow metal storefront applications.
The top jamb mounting can be used on a door with a smaller top rail than a parallel arm closer but the perpendicular arm may be problematic in locations prone to vandalism.
The closer body is mounted.
This type of door closer is referred to as a tail spring 28 and is one of the more simple mechanisms having no damping control.
Door closer mounting options 1.
A regular arm closer is mounted on the pull side of the door.
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With this mounting type the closer is mounted on the door and the arm is perpendicular to the frame.