Norton 78B/D-RA Traditional Door Closer, Regular Arm

Norton 78B/D Traditional Door Closer, Regular Arm Door Closer, Adjustable Size 2-4, Field Reversible

Regular Arm
This is the only pull-side application where a double lever arm is used. It is the most powerefficient application for a door closer. Sufficient frame, door and/or ceiling clearance must be considered. Since the arm assembly projects directly out from the frame, this application may present an aesthetics issue or be prone to vandalism. Only available with non-hold open arm.

EXPLANATION OF FEATURES

Aluminum Alloy Shell
Closer shells are constructed of a special aluminum alloy, carefull selected to accommodate
individual closer characteristics and operating conditions.

Adjustable Spring Power
Clock-type coil spring affords a wide range of closer power. Permits a fine adjustment of the closer to the
environment.

Rack & Pinion Operation
Provides a smooth transmission of power for control of the door through its full opening and closing cycle.

Adjustable Sweep/Latch Speed
A dual purpose regulating valve, hexkey operated, permits independent adjustment of both sweep and latch speed.

Adjustable Backcheck Cushioning
An independent regulating valve, hexkey operated, provides an adjustable hydraulic cushion to the door opening
speed toward the end of the opening cycle. This feature is standard with all but delayed action closers. Backcheck
is not available with delayed action closers.

Non-Hold Open Arm
Standard closer will be supplied with a non-hold open arm. This arm is nonhanded (field reversible).

Hold Open Arm
Available with heavy-duty arms (Parallel Rigid and Unitrol)

Warranty
Limited ten-year warranty for defects and life of the building on the aluminum housing.

Field Reversible
Closer spring can be field-reversed to accommodate the hand of the door. It is recommended that wherever
possible the closer be ordered handed. Parallel hold open arms and delayed action closers are not reversible.

Spring Power
Choice of adjustable spring power: B/D - Spring size 2, 3, or 4 E/F - Spring size 5 and 6

CERTIFICATIONS

• UL / cUL listed for use on fire rated doors
• UL10C listed for positive pressure fire test
• This product is manufactured in an ISO 9001, ISO 14001 facility
• Listed by the New York City Materials and Equipment Acceptance Division

Model: Norton 78B/D-RA 689, 78B/D-RA 690