Norton 8501DA Door Closer with Delayed Action

Norton 8501DA Grade 1 Tri Mount Door Closer, Push or Pull Side, Adjustable Size 1 to 6, Delayed Action, Plastic Cover

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 upon the combination of the angle of door release and valve adjustment.

Pressure 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

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 wheelchairs 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 is advantageous, are doors between office and factory/warehouse facilities, doors to workshops or laboratories, to kitchen and food processing areas, etc

• Exceeds 15 million cycles (witnessed and verified by UL)
• Adjustable spring sizes 1 through 6
• Tri-Style® packaging standard (regular arm, top jamb and parallel arm mounting)
• Non-handed
• Staked valves
• Cast aluminum body