Features

ㆍ Cast Iron Body
ㆍ Rack-and-pinion design
ㆍ Non-handed
ㆍ Adjustable Power: BF-6
ㆍ Built-in Back check
ㆍ Forged steel arm
ㆍ Independent latch, sweep, and back-check

Optional Features

ㆍ Delayed action
ㆍ Metal cover (Handed)
ㆍ Option Arm: CUSH / HCUSH / EDA / HEDA

COMPLIANCE STANDARD

ㆍ ANSI/BHMA A156.4, Grade1 certified
ㆍ UL listed
ㆍ ADA compliant (BF-6)

Cross Reference

STANDARD FEATURES

ㆍCast Iron Body

Closer bodies are constructed of high grade cast iron that can stand up to the constant use and abuse.

ㆍRack & Pinion Operation

Provides a smooth constant control of the door through its full opening and closing cycle. 180�.door swing can be achieved when door, frame, hardware and arm function do not interfere

ㆍNon-handed

With few exceptions all NK5051 Series door closers are non-handed and can be installed on either right or left hand swing doors. Pinion shaft extends vertically through the closer body in both directions.

ㆍSweep Speed Control Valve

Allows adjustment of door speed from the door’s full open position down to approximately 10˚ from the closed position.

ㆍLatch Speed Control Valve

Allows adjustment of door speed from approximately 10˚ down to the door's fully closed position.

ㆍTri-Packed

NK5051 Series come with screws, brackets and soffit plates to allow for regular, top jamb, and parallel arm installations

ㆍAdjustable Back-check Valve

Provides control of the door in the opening cycle, beginning at approximately 75˚ of door opening. it cushions the door opening when the door is forcibly opened beyond its pre-adjusted limits.

ㆍMolded Cover

Molded high impact material. These covers are non-handed for all applications.

ㆍMulti-Sized Door Closer

Adjustable through the power range of sizes BF - 6.
NK5051 (BF-6) also confirms to the BF opening force requirements of the A.D.A and ANSI/BHMA standard A117.1 for interior doors.

COMPLIANCE

ㆍ ANSI/BMHA A156.4, Grade 1 certified
ㆍ UL /cUL listed
ㆍ UL10C listed for positive pressure fire test
ㆍ NK5051 (BF-6) model is designed to comply with requirements for the Americans with Disability Act (A.D.A) and ANSI standard A117.1

DELAYED ACTION

ㆍAdjustable Delayed Action Closing

An optional hydraulic feature that add a third speed range to closing cycle. This feature becomes effective when the door is opened and released at any point beyond 70˚. The amount of time delay depends upon the combination of the angle of door released and valve adjustment. The valve can be adjusted with 4mm hex key from no delay time up to maximum delay times of :

ㆍPressure Relief Safety Valve

The delayed action hydraulic system contains a pressure relief valve. Any time the door is forced toward the closed direction while it is in the closing cycle, the valve will open and permit the door to close. This prevents damage to door, frame and closer.

ㆍSuggested Application

Delayed action closing allows slow-moving traffic to clear the opening before the door closer's normal closing cycle begins. This feature can be helpful in health care facilities such as hospitals and nursing homes. It provides sufficient time for persons on crutches or in wheelchairs to pass through a door without concern of closing. At the same time, it can accommodate the facility's staff with movement of food service carts, bed, and other wheeled traffic.
Use of delayed action closers on many doors throughout industrial and commercial buildings can also assist the flow of traffic. Locations where additional time to clear the opening is advantageous are doors between office, doors to workshops or laboratories, kitchens and food processing area.

ㆍNon-Hold Open

Self-closes door every time door is opened.
Auxiliary stop (by others) required.

ㆍHold Open

Achieved by means of friction or ball and detent / roller. Friction hold open has a range of 90˚ to 180˚ using a template location and mechanical adjustment.
Hold open arm door closers are not permitted to be use on fire door assemblies.