Von Duprin 970978 Ratchet Rele...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$38.55
Von Duprin 970978 Ratchet Release Spacer 1/8" for 33/35/98/99 Series Exit Devices

Von Duprin 970978 Ratchet Release Spacer 1/8" for 33/35/98/99 Series Exit Devices

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Model: 970978 US28
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$38.55
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Von Duprin 970978 Ratchet Release Spacer 1/8" for 33/35/98/99 Series Exit Devices

Commercial-Grade Replacement Part for Exit Device Precision Adjustment

The Von Duprin 970978 is a 1/8" Ratchet Release Spacer designed as a precision replacement component for Von Duprin 33/35/98/99 Series exit devices. This Grade 1 commercial-grade part ensures proper ratchet release alignment and spacing within compatible exit device assemblies. Engineered for use in commercial door hardware applications, this spacer supports reliable exit device operation across the 33, 35, 98, and 99 Series product lines.

Professional Features & Benefits

  • Precise 1/8" Spacing: Delivers exact 1/8" dimensional spacing for accurate ratchet release alignment within compatible exit device assemblies.
  • Broad Series Compatibility: Designed for use with Von Duprin 33, 35, 98, and 99 Series exit devices, providing versatile replacement coverage across multiple product lines.
  • Grade 1 Commercial Quality: Meets Grade 1 standards for commercial door hardware, ensuring dependable performance in demanding, high-traffic environments.
  • Genuine Replacement Part: Serves as an authentic Von Duprin replacement component, maintaining the integrity and performance of the original exit device assembly.
  • Exit Device Parts & Accessories: Classified under Exit Devices Parts and Accessories, this spacer is purpose-built to restore or maintain proper exit device function.
  • Commercial Application Ready: Rated for commercial use, making it suitable for a wide range of institutional, industrial, and commercial building applications.

Technical Specifications

  • Product Group: Exit Devices and Trim
  • Series: 33/35/98/99 Series
  • Grade: Grade 1
  • Product Subgroup: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Type: Exit Devices Parts
  • Commercial/Residential: Commercial
  • Parts and Accessories Type: Replacement Parts
  • Product Attribute: Parts and Accessories
  • Fire Rating: No
  • Product Category: Exit Devices and Trim
  • Department: Door Hardware

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Von Duprin Quality?

Von Duprin exit device parts and accessories are manufactured to Grade 1 commercial standards, delivering the precision and reliability required for professional door hardware maintenance and repair. This 1/8" Ratchet Release Spacer is engineered to exact specifications, ensuring seamless integration with Von Duprin 33/35/98/99 Series exit devices. When dependable performance and component integrity matter, Von Duprin replacement parts provide the trusted quality that commercial applications demand.

Manufacturer Resources

Von Duprin 98/99 Series Catalog

Product Specs

Product Group:
Exit Devices and Trim
Series:
33/35/98/99 Series
Grade:
Grade 1
Product Subgroup:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Type:
Exit Devices Parts
Commercial/Residential:
Commercial
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Fire Rating:
No
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Von Duprin 970978 US28 – Frequently Asked Questions

1) What does the Von Duprin 970978 ratchet release spacer actually do inside an exit device?
The 970978 is a 1/8 inch spacer used to set the ratchet release alignment inside Von Duprin 33, 35, 98 and 99 Series exit devices. It is a replacement component, not a complete assembly, so you order it when a device's ratchet release spacing needs to be restored during a rebuild or repair rather than when you need a new device.
2) Will the 970978 spacer work on my Von Duprin 99 rim device and my 35A devices too?
Yes. The 970978 covers the 33, 35, 98 and 99 Series exit device families, so a shop maintaining a mix of those devices across a building can stock one spacer rather than a different part per series.
3) My exit device is a fire-rated Accentra 7110F - can I use the Von Duprin 970978 spacer on it?
No. The 970978 is a Von Duprin part for 33, 35, 98 and 99 Series devices and is not carried as a fire-rated item. For an Accentra 7110F device the matching internal service part is the Accentra 7110F top latch replacement component, which is the F-specific version of that top latch group. Fire-rated openings should be serviced only with parts listed for that exact device model.
4) What finish should I order the 970978 ratchet release spacer in?
Five finishes are offered: 606 satin brass, 612 satin bronze, 628 aluminum, 710 dark bronze and 711 black. Match the finish to the exit device the spacer is going into so the hardware stays consistent across the opening.
5) I have a pair of doors with no center post and the exit devices will not latch - is a spacer like the 970978 what I need?
Probably not. The 970978 is a small 1/8 inch internal spacer that adjusts ratchet release alignment inside a single Von Duprin 33/35/98/99 Series device. A double door opening with no center post needs a removable mullion, such as the Falcon 4023 steel mullion for double door exit device applications, and the Falcon 525 aluminum mullion stabilizers address mullion movement on those openings. Those are opening-level components, not chassis service parts.
6) What is the difference between the Von Duprin 970978 spacer and a vertical rod replacement part like the Falcon 610061?
They fix different symptoms. The 970978 is a 1/8 inch ratchet release spacer that sets alignment inside the Von Duprin 33/35/98/99 Series device chassis. The Falcon 610061 is a 24 Series Monarch concealed vertical top rod for F-25-C and F-25-CWDC exit devices - a length of rod that carries motion from the device up to the top latch. If the pushbar feels right but the top latch is not retracting on a concealed vertical rod device, the rod is the part in question; if the ratchet release itself is out of position, the spacer is.
7) I need to rekey the cylinder on my exit device - is the 970978 related to that?
No. The 970978 is a mechanical spacer that controls ratchet release spacing in Von Duprin 33/35/98/99 Series devices and has nothing to do with keying. For small format interchangeable core work on a rim device, the relevant item is a rim housing such as the Arrow 16RCR-27 SFIC rim housing in 6/7-pin configuration for the 24/25 Series. Keep cylinder housings and chassis service parts as separate line items on the order.
8) Is this spacer suitable for a high traffic commercial building or is it a residential part?
It is a commercial part, built to Grade 1 for the traffic you see in schools, hospitals, offices, retail and government buildings. Grade 1 is the heaviest duty level in the ANSI/BHMA hardware grading scheme.
9) Is the 970978 a genuine Von Duprin part or an aftermarket copy?
It is a genuine Von Duprin component, carried under the factory part number 970978, so the ratchet release geometry matches the original device build.
How fast can I get the Von Duprin 970978 US28 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Von Duprin 970978 US28 come with a warranty?
Absolutely. The Von Duprin 970978 US28 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Von Duprin 970978 US28?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Von Duprin 970978 US28 from ZenSupply?
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