Posts Tagged ‘electric strike’
Basics About Door Closers
Door closer is a mechanical device installed to close the door after someone opens it or it is opened automatically. There should be correct proportion between the size of door, door closer and number of people using that door or the frequency of opening the door every day. Select the best-suited design to have proper result.
There are basically two types of door closers. Depending on what you need, you can pick them. These can be concealed either in frame or in floor or surface mounted. The closers that are surface mounted can be categorized into four types: Regular arm, Top Jamb Mounted, Slide Track Arm and the Parallel Arm. When we talk about the overhead closers, they are generally surface mounted. Surface mounted closers are those which come with a small boxes attached on the top corner’s of door.
Door closers can be divided in two types depending on the traffic they can manage. Type 1 has been designed for main entrances and high traffic areas. It can endure a use of about 400 times a day and requires a replacement after 3 to 7 years. It even has multiple control modes like sweep, latch and back check.
Type 2 closers are designed for interior doors of an office area which have a medium traffic and are used about hundred times a day. These closers have two valves which control the speed of the door. The first part of closing cycle takes about 5 sec giving enough time for the person to move without having any chance of being struck by the door in this closing cycle. The ideal time of quick and safe door closing cycle is kept to about six seconds.
The back check is the third control which helps the door to open in a constant speed without hitting the stopper or the wall. You have the facility to set the speed in such a way that the door slows down before it is fully opened.
Also heavy wind blowing during the temperature changes slams the door and the windows and if you have a closer installed you can avoid the damages from happening. From fire safety point of view closers on fire doors prevents the fire from spreading and escaping further.
Using these closures on fire doors is also very common. They are closed at the time of fire so that spreading of fire is prevented. Besides the closure facility during fire situation, other things that should be kept in mind are health, safety, durability, etc.
It could entail a lot of effort to open and close doors so why not settle for door closers. This keep your doors safe and secure especially if you own establishments that require one. Or you may want to try electric strikes.