SERIES 7500
SPECIAL FEATURE CLOSER
Special Feature Closers
 Adjustable
Delayed Action Closing: An optional hydraulic feature available 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°. Backcheck cushioning and backcheck positioning are
standard features with all Series 7500DA/7500BF-DA closer.
The amount of time delay depends upon 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 of:
| Door Opened and Released at |
Approximate Time of Delay Cycle |
| 180° 120°
90° |
4-5 minutes 2-3 minutes
25-30 seconds |
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.
For more information contact your Norton Representative or
Norton Door Controls, A Division of Yale Security Inc., 1902 Airport Road, Monroe, NC
28110. Telephone: (800) 438-1951. Fax: (800) 338-0965. In North Carolina: (704) 283-2101
Fax: (704) 289-2875. In Canada, 3160 Orlando Drive, Mississauga, Ontario, Canada L4V 1R5.
Telephone: (905) 672-6220. Fax: (905) 672-9022. WATS: (800) 461-3007.
These materials are protected under US copyright laws. All
contents current at time of publication. Yale Security Inc. reserves the right to change
availability of any item in this catalog, its design, construction, and/or its materials.
Yale®, Yale Security Products®, Yale Secruity Inc®.,
are registered trademarks.
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