The Von Duprin series lineup is what most commercial door hardware conversations eventually come back to. The brand has been engineering panic exit devices since 1908, and today its products are installed on millions of commercial doors across hospitals, schools, correctional facilities, government buildings, hotels, and retail spaces. Fourteen active series cover everything from standard office entries to glass storefronts to abuse-resistant institutional openings. Each series has a distinct application, a distinct parts tree, and specific configurations that do not cross between lines. Knowing which series you are dealing with before you spec or order is the only way to get the right component the first time.

Why the Von Duprin Series Numbering System Actually Tells You Everything

Before diving into individual series, one thing worth understanding is that Von Duprin's numbering is not arbitrary. The number encodes the application tier, the device configuration, and in some cases the door material compatibility. A technician who knows how to read a Von Duprin model number can identify the series, the mounting type, the fire rating status, and the electrified options in seconds. That knowledge is what separates a confident parts order from a five-day return cycle.

The series also defines the parts catalog. Components from the 88 Series are not compatible with the 22 Series. A center case kit for the 98/99 rim configuration is a different part from the center case kit for the 98/9947 CVR device. Getting this right starts at the series level, not the part number level.

Here is every Von Duprin series currently available, what it was designed for, and what part categories sit inside it.

Every Active Von Duprin Series, Explained

98/99 Series

The 98/99 is the dominant commercial specification in North America. Walk into any major hospital, university, or government building built in the last 40 years and you will almost certainly find this device on the egress doors. The 98 uses a smooth mechanism case, the 99 a grooved case. Every internal component is identical and fully interchangeable between the two.

What makes this series the commercial standard is breadth. It covers five device configurations including rim, surface vertical rod (SVR), concealed vertical rod (CVR), wide door cable (WDC), and the 9875/9975 mortise exit device running the 7500 mortise lock body. Electrified options span quiet electric latch retraction (QEL), motorized electric latch retraction (MEL), Chexit delayed egress, Allegion Connect integration, signal switches, and electric power transfers. A building can spec a mechanical 98/99 device today and add electrified access control years later without replacing the device body. That long-term modularity is why it is the default institutional specification. Parts include center case kits, dogging assemblies, mechanism cases, baseplate hardware, push bar components, end cap kits, latch hardware, fire kits, vertical rod assemblies, and the full trim catalog by function.

22 Series

The 22 Series is the practical Grade 1 specification for mid-range commercial applications. Employee entrances, parking garage stairwells, multi-family corridors, back-of-house retail doors. It runs in rim and SVR configurations and carries ANSI A156.3 Grade 1 certification. Electrified options include ALK alarm kits, QEL modular conversion, MEL motorized latch retraction, and request-to-exit (RX) switch kits. One useful item specific to this series is the QM SVR Device Retrofit Kit, which updates older SVR configurations to current specs without a full device replacement.

33/35A Series

Where the 98/99 and 22 Series use a push pad, the 33/35A runs a continuous touchbar across the full door width. The release mechanism engages anywhere along the bar length, which matters in institutional settings where occupants may not know conventional hardware. The 35A variant adds an integral door position switch to the same chassis.

Configurations cover rim, SVR, CVR, WDC, and the 360/E360 control trim variants. The electrified options catalog is second only to the 98/99, including Chexit delayed egress, the E7500 electrified mortise lock, pneumatic options, Allegion Connect, and electric power transfers. Parts run deep into mechanism case assemblies, EL solenoid and plunger assemblies, SS housing components, cables, and fire latch hardware.

55 Series

The 55 Series integrates a full mortise lock body with panic egress hardware, which is why it appears on high-security perimeter doors where architects need mortise lock integrity without compromising IBC egress code compliance. The 7500 mortise lock body sits at the center of this series. Configurations include rim, CVR, and the 5575 mortise device. Parts go deep into mortise lock territory: latch bolt and axle assemblies, cam assemblies in left and right-hand configurations, lift members, lift member channels and levers, spring anchors, center case kits, crossbars, and soffit latch assemblies.

75 Series

The 75 Series is the clean Grade 1 specification for standard commercial buildings where the institutional depth of the 98/99 is not required. Healthcare facilities, retail, offices, light institutional openings. Available in rim, SVR, and CVR configurations. Electrified options include ALK, MEL, QEL modular conversion, and Allegion Connect. The center case reinforcing bracket is a 75 Series-specific component that adds structural support to high-use devices on busy corridors.

78 Series

The 78 Series exists for one application category: aluminum-frame and all-glass storefront doors where the stile is too narrow for any standard-width exit device body. Minimum stile clearance of 1-3/4 inches. Commercial lobbies, retail storefronts, glass office partitions. This is the narrowest form factor in the Von Duprin lineup and its parts are not interchangeable with any other series. Configurations run rim, SVR, CVR, and WDC. The full electrified options catalog applies including ALK, MEL, QEL modular conversion, and Allegion Connect.

88 Series

Built specifically for abuse-resistant, high-security environments. Correctional facilities, behavioral health units, secure government floors, any opening where hardware faces deliberate force or sustained misuse. Construction is heavier throughout. No electrified options exist at the device level by design because mechanical robustness is the specification priority. Configurations cover rim, SVR, CVR, and the 8875 mortise device.

The parts catalog is the most mechanically dense in the Von Duprin line: lever arm kits and axles, axle security pins (individual and 50-packs), dog screws, crossbar reinforcement kits, wedgetite screws, end case kits in multiple configurations, end case springs, vertical rod kits for standard doors plus extension kits for 8-to-10 foot and 10-to-12 foot door heights, soffit latch assemblies, release guide covers, plunger release brackets, and backplate conversion kits.

94/95 Series

The 94/95 Series runs the latch hardware inside the door rather than on the surface, which makes it the specification of choice when visible rods are architecturally unacceptable. Hotel corridors, premium healthcare interiors, high-end commercial spaces. Configurations cover the 94/9547 CVR device and the 9575 mortise device. Electrified options include the E7500 electrified mortise lock and QEL.

Parts are concentrated in latch, rod, and concealment hardware: latch retrofit kits, latch mounting bracket kits, ratchet release assemblies, adjustable extension rod kits from 8'4" to 10', auxiliary fire latch strike hole plugs, and latch linkage pin components. These are precise, configuration-specific components that do not cross to other series.

54 Series Mullions

Mullions are the center post components on double door openings where a vertical rod device on one leaf needs a strike point at the door center rather than the frame. The 54 Series covers fixed and removable configurations. Removable mullions allow the full double door width to open for large-format access, common on loading dock entries and large institutional openings. Parts include mounting hardware, locking assemblies, and strike components.

Electric Strikes: Four Series Covering Four Security Tiers

Von Duprin manufactures four electric strike lines, each engineered for a different access control requirement at the door frame.

The 5100 Series covers standard commercial cylindrical and mortise lock applications. The 6100 Series steps up to heavy-duty performance with broader lock compatibility. The 6200 Series delivers high-security fail-secure performance, maintaining the locked position during power failure rather than failing open. The 6300 Series carries the widest lock compatibility across cylindrical, mortise, and panic hardware in a single platform.

Parts across all four series include solenoid assemblies, strike plates, cover kits, and mounting hardware. Electric strike components are not cross-compatible between series.

Exit Alarm Guard-X

The Exit Alarm Guard-X is the alarmed exit device for secondary exits, stairwells, and storage room doors where a local alarm on door use is required but a full access control integration is not specified. The alarm is integrated directly into the panic bar hardware rather than added as a kit onto a standard device. Parts include alarm batteries, retainer nuts, and disarming labels.

What Makes Security Parts the Right Place to Source Every One of These Lines

Most hardware distributors list Von Duprin parts by product name or part number without the model-specific context that tells you whether that component applies to the device generation installed on your door. A dogging spring listed under "22 Series" without a diagram of the device assembly it fits is still a potential wrong-part order.

Security Parts organizes the complete Von Duprin series catalog model-first. Every series has a dedicated page. Every model within that series has its own parts breakdown organized by component category. The interactive diagram on each model page shows the full assembly so a technician or facilities manager can identify a failing component visually before placing the order.

The platform has been operating in commercial door hardware since 2001 and supports legacy models alongside current-generation devices because commercial buildings run mixed hardware generations across their openings. A facility manager sourcing a replacement mechanism case for a 98/99 device installed in 2004 needs to know whether the current part number applies to that generation. That cross-generation depth is built into how the catalog is organized, not something you have to figure out by calling a distributor and hoping someone knows the answer.

Common components ship same business day from US warehouses.  Pre-order compatibility confirmation available at 845-935-0301 or sales@securityparts.com.

Conclusion

Fourteen Von Duprin series cover the full spectrum of commercial egress hardware from standard office entries to correctional facility installations, glass storefronts, alarmed secondary exits, and electrified access-controlled openings. Each series has a distinct application logic, a distinct parts catalog, and specific configurations that do not cross between lines. Getting any repair or specification right starts at the series level. Browse the full Von Duprin series catalog at Security Parts, select your series, use the model-specific diagram to confirm the component, and order with same-day shipping on stocked parts from US warehouses.

FAQs

What is the Von Duprin series most commonly installed in commercial buildings?

The 98/99 Series. It covers the widest range of configurations including rim, SVR, CVR, WDC, and mortise, and carries the deepest electrified options catalog of any Von Duprin exit device line.

Which Von Duprin series fits narrow aluminum and glass storefront doors?

The 78 Series. It accommodates stile widths as narrow as 1-3/4 inches where standard-width Von Duprin devices will not fit. Its parts are not interchangeable with any other series.

Are Von Duprin 98 and 99 Series parts the same?

Yes. The 98 has a smooth mechanism case and the 99 has a grooved case, but every internal component including dogging assemblies, latch hardware, and mechanism cases is fully interchangeable between the two.

What Von Duprin series is specified for correctional facilities?

The 88 Series. It is built for abuse-resistant, high-security environments with heavier construction throughout and no electrified options at the device level by design.

What is the difference between Von Duprin electric strike series?

The 5100 covers standard commercial use, the 6100 is heavy-duty, the 6200 is fail-secure for high-security applications, and the 6300 covers the widest lock compatibility range. Parts are not cross-compatible between series.

Where can I find parts for every Von Duprin series in one place?

Security Parts carries the complete Von Duprin series catalog organized by series and model with interactive diagrams, same-day shipping on stocked components, and pre-order compatibility support at 845-935-0301.