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:

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.