Norton 8547 Low Ceiling Clearance/Overhead Door Holder Drop Plate
The 8000 Series Door Closers offer the ideal combination of appearance, reliability and durability in today's market. With features such as staked valves, precise valve adjustment and a complete range of arm and cover options, this closer can meet virtually any application challenge.
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.
ANSI/BHMA A156.4, Grade 1 certified
Closers for interior and exterior doors shall be full rack-and-pinion type with cast aluminum alloy shell. Closers shall be surface mounted and shall project no more than 2-1/8" from the surface of the door with standard cover. Closers shall be non-handed to permit installation on doors of either hand. Closer fluid shall contain lubricity and anti-oxidation agents. Closer fluid shall maintain stable viscosity to allow door closer to perform in temperatures ranging from extremely high to as low as -40°F. Closers shall have multi-size spring power adjustment to permit setting of spring from size 1 through size 6. Closers shall have two non-critical valves, hex key adjusted, to independently regulate sweep speed and latch speed. Closers shall have adjustable backcheck intensity controlled by a hex key adjusted valve. [Closers shall have adjustable delayed action closing controlled by a hex key adjustable valve.] Regular arm and top jamb closers shall have a non-hold open shoe permitting 15% ( + or – 7-1/2% ) power adjustment. **Closers shall be enclosed in a [molded resin cover] [plated or sprayed metal cover], Closers to be Norton® [8301/8501] [8501M] [8501MA] [8501A]. **For special arms insert that specification here **Unitrol® ArmDoor closers shall have a fixed door stop feature effective at one point selected at installation, from 85° - 110° in five degree increments. Door stop shall be cushioned by a shock-absorbing heavy-duty spring action effective at the [soffit plate] [arm shoe] pivot. [Closers shall be provided for parallel arm installation using a rigid steel main arm and secondary arm lengths proportional to the door width.] [Closers shall be provided for top jamb installation using a forged steel, rigid main arm and telescoping secondary arm adequate for the frame reveal of the openings.]
**CloserPlus® Arm Door closers shall have a field reversible door stop. Door closer shall have a feature with selectable on and off ball and detent hold open. Hold open tension shall be adjustable effective at one point selected at installation, from 85° - 110° in five degree increments. [Hold open mechanism shall have engage/disengage selection actuated by thumbturn]. Closers shall be provided for parallel arm installation using a forged rigid steel main arm and secondary arm. **CloserPlus Spring™ ArmDoor closers shall have built-in door stop [and holder] effective at one point selected at installation, from 85° - 110° in five-degree increments. Door stop mechanism shall be reversible and have a buffer spring that engages prior to the dead stop feature, reducing shock loads to the door and frame assembly. Door stop mechanism shall be non-handed and attached to soffit plate. [Hold open mechanism shall have engage/disengage selection actuated by thumbturn]. Closers shall be provided for parallel installation using a forged rigid steel main arm and secondary arm.
8301/8501: Adjustable spring sizes 1-68301/8501: Tri-style® packaging standard (regular arm, top jamb and parallel arm mounting)Exceeds 15 million cyclesNon-handedStaked valvesStandard, separate and independent, latch, sweep and backcheck intensity valvesCast aluminum bodyRack and pinion design1-1/4" (32mm) piameter piston5/8" (16mm) diameter pinion journals2-1/8" (54mm) projection (standard covers)All standard arm applications (with slim, full or metal covers) allow doors to swing 180°, conditions permitting8301: shipped with slim line plastic cover8501: shipped with full plastic cover
Typical Applications- Recommended for interior or exterior doors including: Offices, Banks, Retail Malls, Hotels, Health Care, Clinics