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Closer for interior (and) exterior doors shall be rack-and-pinion type enclosed in a cast aluminum alloy shell. Closer spring shall be clock-type coil spring and shall be adjustable through a wide range of closing power. Closer shall be equipped with a single hex-key operated regulating valve for control of both closing and latch speeds. Closer shall have a hex-key operated regulating valve to control the adjustable backcheck feature.
- Aluminum alloy shell
Adjustable spring power: B/D = spring size 2-4; E/F = spring sizes 5 and 6
Rack and pinion operation
Adjustable sweep/latch speed
Adjustable backcheck cushioning
Field reversible (parallel hold open arms and delayed action closers are not reversible)
Self drilling, self tapping and machine screws standard
Sleeve nuts standard (Parallel Rigid and Unitrol® arms only)
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