SERIES 8301/8501

CONTROL OPTIONS

Control Options

Norton Unitrol^® Door Controls

The Series 8301 and Series 8501 door closer is the basic control component of the Norton Series UNI-8301 and Series UNI-8501 parallel arm Unitrol and the Series UNI-J8301 and Series UNI-J8501 top jamb Unitrol Door Control.

This unique control integrates a door closer, a shock absorber, and an overhead heavy-duty door stop, with or without hold-open feature, into a single door control.

For complete details see the Unitrol Door Control Section.

Norton CloserPlus™ Door Controls

The Series 8301 and Series 8501 door closer is the basic control component for the Norton Series CLP-8301 and Series CLP-8501 CloserPlus Door Control. This control integrates a door closer with a heavy-duty arm assembly and a positive door stop. A manual engage/disengage hold-open feature is optional.

For complete details see the CloserPlus Door Control Section.

Special Feature Closer

Adjustable Delayed Action Closing: An optional hydraulic feature that adds a third speed range to the closing cycle. This feature becomes effective when the door is opened and released at any point beyond 70°.

The amount of time delay depends on the combination of the angle of door release and valve adjustment. The valve can be adjusted with a 1/8" hex key from no delay time up to maximum delay times within the delay range of:

Pressure Relief Safety Valve: The delayed action hydraulic system contains a pressure relief valve. Anytime 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.

Suggested Applications: 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 wheel chairs to pass through a door without concern of it closing. At the same time it can accommodate the facility's staff with movement of food service carts, beds 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 are advantageous are doors to computer rooms, doors between office and factory/ warehouse facilities, doors to workshops and to laboratories, to kitchen and food processing areas... to list just a few.