NORTON UNI 1604HAL UNITROL HO SIZE 4 DOOR CLOSER FOR 33-41" WIDE DOORS HOLD OPEN

Features 

This closer is for  parallel arm applications. Unitrol arms combine the features of a double lever arm overhead door stop  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 lbs. of force,  prior to the door's dead stop. Coupled with the door backcheck feature, this arm provides the most controlled stop available with a surface door closer.

Non-handed

Power Size:  SIZE 4 

HOLD OPEN

Separate and independent, latch, sweep and backcheck intensity valves

Sweep Speed: Allows adjustment of door speed from the door's full open position down to approximately 10° from the closed position.

Latch Speed: Allows adjustment of door speed from approximately 10° down to the door's fully closed position.

Backcheck: Provides control of the door in the opening cycle, beginning at approximately 75° of door opening. It slows/cushions the door opening, when the door is forcibly opened beyond its pre-adjusted opening speed limits.