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Qualitydoor.com > Closers > Door Closers > Norton 78-B/F Traditional Unitrol Surface Door Closers

Norton 78-B/F Traditional Unitrol Surface Door Closers

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SKU: UNI78B/D-689-24

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Norton 78-B/F Series Catalog

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Norton 78-B/F
Traditional Surface Door Closers

• Aluminum alloy shell
• Spring power adjustment
• Speed regulating valve
• Backcheck cushioning regulating valve

Norton® closer shells are constructed of a special aluminum alloy, carefully selected to accommodate individual closer characteristics and operating conditions.

These Norton Traditional Surface Closers have an unusual ability to accommodate power adjustment to their environment. The adjustable clock coil spring provides a small incremental increase or decrease through a wide range of closer power. They can be adjusted to meet the exact power requirements of the installation. Sweep speed, latch speed and backcheck cushioning can also be adjusted to door, frame and variable conditions.

Unitrol arms combine the features of a double lever arm overhead door stop/holder with the backcheck feature of the door closer to reduce door stopping shock loads to a minimum. The Unitrol uses a compression spring buffer at the soffit plate/arm shoe that will absorb 30 lbf. of force, 5° prior to the door’s dead stop. Coupled with the door closer’s backcheck feature, this arm provides the most controlled stop available with a surface door closer.

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Norton 78-B/F Series Catalog

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