Door Closer
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WHIRLPOOL/KENMORE REFRIGERATOR DOOR CLOSER SHIM#987179 $3.00 |
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NORTON DOOR CLOSER TYPE REGULAR PARALLEL NEW $136.00 |
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New 45-75KG Commercial Door Closer Durable Easy to Install $9.99 |
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Door Closer Door Stop Easy Setup, Size 190mm $7.50 |
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Vintage Yale & Towne Mfg. Door Closer $12.99 |
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Norton 1601 Aluminum Door Closer NIB New $99.00 |
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New box open Corbin Russwin door closer DC3210-M54 $124.99 |
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NEW DORMA DOOR CLOSER 6604 PA FCOV US10 COV VV-315 $28.99 |
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International Medium Concealed Overhead Door Closer Body Model 233 $65.99 |
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Brand New Commercial Building Hardware SIZE 2 Surface Door Closer U.L $27.97 |
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Brand New Commercial Building Hardware SIZE 2 Surface Door Closer U.L $27.97 |
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NEW KANT-SLAM HYDRALIC GATE OR DOOR CLOSER $35.00 |
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National Door Closer Adjustable Pneumatic Automatic Press N Hold V1345 NEW OTHER $12.98 |
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National Door Closer Adjustable Pneumatic Automatic Press N Hold V1345 NEW OTHER $12.98 |
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National Door Closer Adjustable Pneumatic Automatic Press N Hold V1345 NEW OTHER $12.98 |
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Yale 4400 Door Closer 689 Finish $84.99 |
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DOR-O-MATIC SC60 DOOR CLOSER (ALUMINUM FINISH) $79.99 |
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BRAINERD Automatic Hinge Pin Door Closer Brass Plated 32100 $3.99 |
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DOORMAN AUTOMATIC DOOR CLOSER MADE BY RYOBI $9.99 |
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LCN DOOR CLOSER THRIFTEE MODEL 1071 ALUM FIN A166 NIB $55.00 |
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Dorma Door Closer Mount TS82BC with Arm $45.00 |
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Door closer holder Smok-Chek Rixson FS4PULL-I LH $190.00 |
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Door closer holder Smok-Chek Rixson FS6PULL-I RH $390.00 |
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Door Closer for Wheelchair user! $7.95 |
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Heavy Duty Industrial Door Closer $0.99 |
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Skylink GT-100A Butler automatic timer Audio car Garage Door Closer new $39.99 |
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Norton 1605BCH Tri Pack Door Closer Size 5 Non Adjustable Non-Handed $13.75 |
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Vintage Sargent door closer $14.00 |
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Skylink GT-100A Butler automatic timer Audio car Garage Door Closer remote new $39.99 |
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Skylink GT-100A Butler automatic timer Audio car Garage Door Closer new $39.99 |
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NEW Dor O Matic Model SC60 Door Closer Full Cover Black Finish $44.95 |
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BRASS OR CHROME FIRE RATED CONCEALED CHAIN SPRING DOOR CLOSER $7.67 |
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BRASS OR CHROME FIRE RATED CONCEALED CHAIN SPRING DOOR CLOSER $7.67 |
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WRIGHT STORM & SCREEN MEDIUM DOOR CLOSER WOOD AND METAL DOORS $0.99 |
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YALE V2304BC Door Closer Size 4 Reversable Non-Hold Open Dark Bronze USA – NEW $79.00 |
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Sargent Powerglide 150 Door Closer 1970 print Ad $9.99 |
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Door Closer Arm R25944 $9.99 |
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LCN Super Smoothee door closer 4041 aluminum color $126.84 |
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Dark Brz Adjbl Spring Power Size 2 to 5 Delayed Action Surface Mnt Door Closer $55.67 |
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Aluminum Adjbl Spring Power Size 2 to 5 Delayed Action Surface Mount Door Closer $55.67 |
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Lot of 2 LCN 4040XP Rw/PA SRT ALUM Door Closer $270.00 |
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Universal Hardware Heavy Duty All-In-One Commercial Door Closer $19.96 |
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Universal Hardware Heavy Duty All-In-One Commercial Door Closer $19.96 |
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White Heavy-Duty Storm Door Pneumatic Closer $20.89 |
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White Medium Duty Screen Door Pneumatic Closer $13.63 |
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Black Heavy-Duty Storm Door Pneumatic Closer $20.89 |
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Aluminum Heavy-Duty Storm Door Pneumatic Closer $20.89 |
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WRIGHT PRODUCTS DOOR CLOSER V2010WH $3.96 |
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LCN Concealed Closer 2014 Door Closer Right Hand New in Box Free Shipping $299.00 |
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LCN Concealed Closer 2014 Door Closer Left Hand New in Box Free Shipping $299.00 |
How Does a Door Closer Work: An Overview
Door closers are a common sight in most commercial buildings. They are mechanical devices typically installed to ensure that doors get closed after patrons, residents and other building-users open them.
Local building codes usually determine what exits must be outfitted with door closers. Some may require all doors have them. At the very least, most regions require them on fire doors. The reason for this is that fire doors are to remain closed at all times when not in immediate use. This helps to ensure that, should a fire break out in the building, flames do not spread from one part of the building to another before firefighters can bring the blaze under control.
Door closers are either surface mounted or concealed, and are so-named due to how they are installed on (surface mounted) or within (concealed) the door. Surface-mounted devices appear as a small box attached to the top corner of the door. A jointed “arm” extends from the top of the box to the frame where it is bolted in. A concealed device is mounted within the material of the door itself, meaning that the only part visible to the eye is the arm.
Door closers come in two major types: manual and automatic. The most common is the manual type. Over seventy percent of those found in commercial buildings in North America are this type.
Additionally, manual door closers may be overhead or jamb mounted. The overhead style is more common, particularly on older public buildings. This type looks like the typical box and arm device.
A jamb-mounted device is installed on the inner frame of the door and the inside edge of the door. The mechanism is only visible when the door is open. Once it closes, a jamb-mounted device is invisible on both the interior and exterior side.
Manual door closers (whether overhead or jamb-mounted) work on the principle of pneumatics (air pressure) and stored energy. The device stores the energy that is generated when someone pushes the door open. It then uses this energy to close it without any additional human force being applied.
Closing speed can be controlled and adjusted as desired. Some use hydraulic dampers (these are most common,) others employ spring mechanisms. Sets of screws are adjusted to achieve desired closing and latching speed. (Many regions have building codes which mandate closing speed on door closers, usually in deference to disabled patrons who may take longer to enter and exit.)
Automatic door closers, as the name suggests, use electrical power instead of stored energy. This style is less common, due to the amount of power required and the interest of economy and conservation. Automatic devices are typically found on buildings where particular entrances/exits are highly controlled and monitored and buzz-in/out is employed, such as residential care homes.
Door closers that are intended for use on fire doors must be fire-rated. Devices that are fire rated have been tested by a recognized testing facility to ensure that they can withstand heat/flames. They must be able to hold fire at bay for as long as the fire door itself does; a typical one is usually required by law to contain fire/flames for a minimum of three hours.
About the Author
Jenny Schweyer writes extensively on commercial hardware and related themes.
Popular Hardware: The Web’s largest supply of commercial door hardware products.
Commercial Hardware Solutions: Hints & tips for commercial business and property owners.
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Adjust Geze TS4000 door closer