What is a Door Closer Backcheck?
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I thought That discussing backchecks on door closers would be a good place to start this blog. So Just what IS a Door closer backcheck? And why should You want one? Well,Have you ever opened a door. then suddenly. A Gust of wind pulls the door away from you and slams it hard against the building? Its happened to us all! It can be very disconcerting perhaps even dangerous, and those kinds of shock loads can certainly wreak havoc on doors and frames. The closer arm can be broken,commercial doors caught by wind can even be dangerous.
Most commercial grade door closers come with a backcheck feature. it dampens the swing of the door in case the wind catches it. The backcheck slows the rate of opening of the door through a hydraulic dampening mechanism within the door closer. You may ask "how should this backcheck be adjusted?" First, Locate the backcheck adjustment (Usually a small set screw). when the door swings a little past the 90-110 degree position, you should feel the rate of opening slow considerably. adjust so that the dampening effect is gradual,but not abrupt. remember that adjusting the backcheck for an abrupt stop is not advisable because it puts a great deal of strain on the door closer arm, but it should be enough to slow the door down should a blustery day try to blow it open.usually tightening the screw increases the backcheck dampening effect, and loostening it decreases the bc effect.
Leaky door closers: if you have a leaky door closer it can often be rebuilt. Is it practical to rebuild a door closer? If it is a quality door closer, like an LCN4040 then YES, if it is a cheap throw away, parts are likely not available for it.Please consider BUYING One from locksandsafesonline Here!
....more to come!
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