A member of the Yale Security Group

7900 FEATURES

Aluminum Alloy Shell: Series 7900 closer bodies are constructed of a special aluminum alloy, carefully selected to accommodate individual closer characteristics and operating conditions.

Rack & Pinion Operation: Provides a smooth transmission of power for control of the door through its full opening and closing cycle.

50% Power Adjustment: Power can be adjusted by 50% over the minimum closing force for each size of closer by rotating the spring adjustment gear assembly with a standard blade screwdriver.

Adjustable Sweep Speed: An independent regulating valve, hex-key-operated permits adjustment of the general closing speed.

Adjustable Latch Speed: An independent regulating valve, hex-key-operated, permits adjustment of the door's speed for approximately the last 5° of the closing cycle.

Adjustable Backcheck Cushioning: An independent regulating valve, hex-key-operated, provides an adjustable hydraulic cushion to the door opening speed toward the end of the opening cycle.

Adjustable Backcheck Positioning: An independent valve, hex-key-operated, allows adjustment of the point, in the door's opening cycle, at which backcheck cushioning takes effect. It provides a range of 20° within which backcheck can be set.

Non-Critical Valves: All control valves for sweep/latch speed, backcheck control and delayed action closing are non-critical and are adjusted by a standard 1/8" hex-key.

Non-Hold-Open Arm: This arm is 13" (330mm) long with an offset bend to permit door openings to 180°. This arm is handed.

Hold-Open Arm: This is a straight arm, 16" (406mm) long. This arm is non-handed.

Separate Hinges/Pivots: Door is hung with Butt Hinges, 3/4" Offset Pivots or Center Pivots furnished by others. There is no need to open the door closer packaging to supply the hinges/ pivots to the job or the door supplier. This eliminates problems with coordination of the hardware with other trades and reduces the probability of lost hardware.