SPECIAL FEATURE CLOSERS
Special Feature Closers
 Adjustable
Delayed Action Closing: An optional hydraulic feature, available in place of backcheck
cushioning and backcheck positioning, 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. 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. 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 stow 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.
Telephone Booth Operation:
Closer holds the door to the telephone booth open at 5°
from the closed position. This prevents the light switch from being activated and allows
the booth to be ventilated. It also indicates to users that the booth is unoccupied. The
person using the booth then closes the door from the 5° open position. The closer does
not start spring compression until the door is opened beyond 5°. To further assure the
door remains open, the latch speed regulating valve is almost completely closed. This
prevents the inertia of a closing door from passing through the 5° opening point.
Available in size 2 only for regular arm, top jamb or
parallel arm application. |
