Norton B/F-5 Parallel Arm Assembly
The Norton Series 78-B/F Potbelly Surface Closers represent a combination of traditional styling and modern closer features. All closer sizes are contained within a single size aluminum alloy shell. Templates for installing this closer are the same for all closer sizes.
The right door closer for any door is defined by the weight of the door, the amount of traffic the door gets and the specific needs of the opening. Norton has the right door closer for any situation, including a selection of mechanical closers found here.
A surface closer is just what the name suggests, and Norton offers this practical and versatile door closer in light, medium and heavy duty. As the names suggest, select any of these mechanical closers based on the amount of traffic the door receives.
A cam action closer is a mechanical closer that provides greater efficiency for slide track operation. This style provides lower opening resistance without giving up closing force and control. This combination complies with the requirements of the Americans with Disabilities Act (ADA).
The cam door closer offers an adjustable sweep and latch speed. This stylish model of mechanical door closer from Norton is a great choice for both designers and architects.
But if the application requires an even cleaner look, like in an office building or conference center, consider a concealed mechanical door closer. This fits into the frame header so that only the solid, one-piece arm can be seen when the door is open. This door closer is great for security situations as well.
Product Specification 1
Our experience is that you can find the right commercial door closures from Norton Door Controls. They have been designing and manufacturing door operating systems since 1880, and have a proven track record of innovation in developing new door operating systems.
This constant innovation and development is important to the person installing the door operating system and for the owner of the commercial facility where it will be in operation for years to come. In the first place it means years of reliable operation. But it also means that you will be able to find the right components for the job.
Norton Door Controls covers all the bases from simply preventing doors from slamming shut to full automated operation with energy saving features. These commercial door operating systems come in a wide variety of looks including a concealed system hidden in the door header.
Norton Door Controls is part of the ASSA ABLOY family of companies featuring top of the line doors and door operating components all designed to work together in one seamless system. We look to ASSA ABLOY to provide our customers with door solutions at a variety of costs and features.
You can too. From light duty to heavy traffic doors, Norton Door Controls has the type of commercial door closure you need.
In addition only two springs are needed to accommodate the complete range of door sizes. One clock spring is adjustable to meet the closing force requirements for closer sizes 2, 3, and 4. One other larger spring can be adjusted to meet the closing force for closer sizes 5 and 6. Both springs are powerful enough to provide an additional 50% power increase over the minimum closing force for the largest size in their range; i.e. 50% over size 4 and 50% over size 6.
These Norton Traditional Surface Closers have an unusual ability to accommodate power adjustment to their environment. The adjustable clock coil spring provides a small incremental increase or decrease through a wide range of closer power. They can be adjusted to meet the exact power requirements of the installation. Sweep speed, latch speed and backcheck cushioning can also be adjusted to door, frame and variable conditions.
Aluminum alloy shell
Adjustable spring power: B/D = spring size 2-4; E/F = spring sizes 5 and 6
Rack and pinion operation
Adjustable sweep/latch speed
Adjustable backcheck cushioning
Non-hold open arm standard (specify regular or parallel when ordering)
Field reversible (parallel hold open arms and delayed action closers are not reversible)
Self drilling, self tapping and machine screws standard
Sleeve nuts standard (Parallel Rigid and Unitrol arms only)
Hold open arms
Heavy duty arms: Parallel Rigid, Unitrol (non-hold open and hold open)
Sleeve nuts (regular and parallel arms)
Thru Bolts and Grommet Nuts (TBGN)