| | | Door Closers | We carry LCN, Norton and Cal-Royal door closers. All of these brands allow you to choose the specifications needed to manage the traffic of the door that you are controlling. For a new installation, a significant point to consider is the amount of anticipated traffic expected for the door. Closers are labeled as to how much traffic they are designed to endure before needing replacement. An important factor, when purchasing a closer, is to buy a sizable closer. This allows you the opportunity to adjust the power of the unit. This is also known as torque. When you increase the amount of power to control the door, it allows one to control the door with less speed.
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Grade 1 closers are designed with
multiple controls including sweep, latch and backcheck. Grade 1 closers are
designed to endure high traffic areas and are typically used for main entrances
of most businesses. These closers are generally used 300-400 times a day and
last for three to seven years before needing replacement.
Grade 2 closers are designed for medium traffic in a commercial application. An
example of this is an interior door in an office area that is used approximately
50-100 times a day. These types of closers would need a minimum of two valves to
control the speed of the door. The first valve controls what is called the
sweep. This is the point from where the door is fully open until it reaches
about 10 degrees remaining to close. At the 10-degree point another valve takes
over to control the final speed. This is called the latch speed. When adjusting
a closer, the ideal target time needed for the door to close is about six
seconds. The first part (sweep) will consume the majority of this time, about
4.5 to 5 seconds. This allows someone to let go of the door without having to be
concerned about being struck by the door as it starts its closing cycle. Once it
reaches the latch point, the speed can be increased, providing enough momentum
and pressure needed to latch the locking mechanism on the door.
For exterior doors, a third valve or control is needed. This called the
backcheck. The purpose of this valve is to slow the door down from opening too
fast and/or hitting against a stop or wall. With this valve you can set the
position of the opening where you want it to start cushioning the speed or
momentum of the door, before it reaches the full degree of opening. Some Grade 2
closers do not come with a backcheck control.
If the door closer is installed to allow the door to open to 115 degrees, one
might adjust the backcheck to start slowing the door down at approximately 85
degrees. For all exterior applications we highly recommend a closing device with
a backcheck feature.
Warranties vary from each manufacturer. Available standard finishes of aluminum,
duronodic (dark brown), and flat gold. Plated finishes are also available. |
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Featured Items We Sell
- Lock Boxes
- Door Closers
- Panic Bars
- Mortise Locks
- Deadbolts
- Bump Proof Locks
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