Back to Product List

Quiet Mechanical (QM)

The Von Duprin quiet mechanical solutions are ideal for applications where operational noise is kept to minimum. 


Looking for more information? Connect with an Allegion team member for help.


The Von Duprin QM option controls motion to reduce operational noise. The QM trim solution provides a damper-controlled lever return. Likewise, the QM rim device option provides damper-controlled re-latching.

The QM option can be ordered pre-installed from the factory. Retrofit kits are also available for both the trim and device, which provides a cost effective way to upgrade existing devices. No modifications to the existing door or frame prep are required. Compatible with other mechanical and electronic options including quiet electric latch retraction (QEL), accessible design (AX), request to exit switch (RX), cylinder (CD) and hex (HD) dogging to address a variety of applications. 

For optimal quiet performance of your total opening, use the Von Duprin QM option along with a properly adjusted door closer and door silencers. The acoustical performance of an opening is based on a variety of factors including the door and frame material, closer performance, and door accessories. Allegion offers a wide portfolio of solutions to address your specific needs.




  • Damper controlled re-latching, available on 98/99 and 33A/35A exit devices
  • Damper controlled lever return, available on 996 trim
  • Available pre-installed from factory or as a retrofit kit
  • Compatible with Quiet Electric Latch retraction (QEL), AX, request to exit (RX), cylinder dogging (CD) and hex dogging (HD)

Von Duprin exit devices and trim will maintain the following: 

  • ANSI BHMA A156.3 Grade 1 (2020)
  • UL305  
  • UL10C 
Von Duprin 101 Icon

Options & Accessories

For frequently asked questions, educational resources and technical product materials, visit the Options & Accessories 101 page.

Need Replacement Parts?

Here's what you need to know to identify the product, part, kit or model number and get in touch with an Allegion Team member.

Related Products

Did You Know?

Von Duprin has hundreds of possible configurations for any type of opening, giving you flexible and modular options.

Over 100 Years of Excellence
allegion logo


As part of Allegion’s family of pioneering brands, Von Duprin benefits from the strength, efficiencies, resources, and integration from a global power. In turn, we pass those advantages on to you.

Allegion helps keep people safe and secure where they live, work and visit. With more than 30 brands sold worldwide, we specialize in security around the doorway and beyond. It’s the power of one.