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The VON DUPRIN 090091 is a pack of four left hand reverse lever control springs designed for use in commercial-grade exit device hardware. These small but critical components maintain proper lever tension and return function in exit devices, ensuring the lever resets correctly after each use. Weighing just 0.05 pounds per pack, the set ships as a single unit and is sized at 4.5 inches long by 3 inches wide by 1 inch high in its packaged form. Installation is performed by licensed door hardware technicians or qualified locksmiths servicing commercial exit device assemblies.
These lever control springs are specified as direct replacements for left hand reverse configurations in VON DUPRIN exit device series 371, 373, 375, and 378. They are commonly used in commercial and institutional buildings where exit devices require periodic maintenance or field repair. Replacing worn or fatigued springs restores proper lever operation and helps maintain code-compliant egress function in high-traffic doorways.
Compatible with VON DUPRIN exit device series 371, 373, 375, and 378 in left hand reverse lever trim configurations.
Installation should be performed by a qualified door hardware technician or licensed locksmith familiar with commercial exit device service. Before beginning work, ensure the door is secured open and all associated electric or electromechanical hardware is de-energized. Refer to the applicable VON DUPRIN installation documentation for the specific series to confirm spring orientation and seating. Follow all applicable local building and life safety codes governing egress hardware maintenance.
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