11 UNION Trade catalogue Door closers & exit hardware Door furniture Locks & cylinders 1 3 2 Fitting position All our mechanical overhead door closers are tested in all three configurations for complete peace of mind. Terminology Power size The strength (torque) of the closer and its ability to offer reliable controlled closing to a particular size of door. Backcheck Slows the opening speed of the door before it gets to 90° to help prevent damage to the door and adjacent walls. Latching action Speed of door leaf in the final closing motion, designed to allow the door to overcome the resistance of a door latch or close without slamming. Closing speed Speed of door leaf when its closing. Dimensions Regular (Fig.1) Transom (Fig.61) Parallel (Fig.66) All products supplied with fixings 2 - Width PULL PUSH PUSH 1 - Height 3 - Depth
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