Norton 1601 Series
Unitrol Door Closers
• Non-handed
• Rack-and-pinion design
• Cast aluminum body
• 1-3/8" diameter piston
• 5/8" diameter pinion journals
• Standard, separate and independent, latch, sweep and backcheck intensity valves
• 2-7/8" Projection
• Unitrol arm (parrallel arm only), please specify door width
Closer bodies are constructed of a special aluminum alloy, carefully
selected to accommodate interaction with steel components and operating
conditions.
Rack & Pinion Operation provides a smooth constant control of the
door through its full opening and closing cycle. 180° door swing can be
achieved when door, frame, hardware and arm function do not limit door
swing.
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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