Quick Answer

Sourcing exit devices parts accurately starts with the model number, not the component name. Here is what every facilities manager and locksmith needs to know before opening any parts catalog:

• Parts are series-specific, never universal. A dogging assembly from the 22 Series does not fit the 75 Series. Always confirm the model number first.
• The six component categories that cover most repairs: dogging assemblies, center cases, push bar and crossbar components, strikes, lever arms (88 Series), and SVR latch components.
• The dogging shaft 090040 requires the long 5/32-inch hex key. The dogging hole is only 1/4 inch deep. Short keys round out the hex engagement and cause premature shaft failure.
• Pre-1997 vs post-1997 matters for dogging assemblies. Part 050709 is the conversion kit for pre-1997 devices.
• Strike selection follows fire rating. The 299 and 299F share the same dimensions but are not interchangeable. The 1609 strike is not rated for fire doors.
• ANSI A156.3 is the governing performance standard for exit devices and sets the testing criteria all Von Duprin series must meet.

Browse the complete Von Duprin exit device catalog at Security Parts, organized by series with interactive parts diagrams. For a full overview of every series in the Von Duprin lineup, see the Von Duprin series guide.

Why Exit Device Parts Are Series-Specific, Never Universal

This is the single most important fact to internalize before opening any parts catalog. Von Duprin's exit device lineup covers fourteen active series across push pad, touchbar, crossbar, and mortise configurations. Each series uses components engineered to its own dimensional and mechanical specifications. A dogging assembly from the 22 Series does not fit the 75 Series. A center case for the 98/99 rim configuration is a different part from the center case for the 98/9947 CVR configuration.

The model number stamped on the mechanism case or baseplate is the starting point for every parts order. The first two or four digits identify the series. The function suffix identifies the trim function and configuration. A "-F" suffix means fire-rated, which removes the hex dogging function entirely. Get the model number before the catalog opens.

For a full comparison of all Von Duprin exit device series by application, traffic rating, and configuration, see the Von Duprin exit device series comparison. For a broader overview of all Von Duprin replacement components, see the Von Duprin parts guide.

The Six Exit Devices Parts Categories That Cover Most Repairs

Von Duprin 22 Series rim exit device. View the Von Duprin 22 Series rim model page.

Dogging Assemblies

Dogging is the mechanism that holds the push bar in the depressed position, keeping the latch bolt retracted so the door operates freely without latching. Standard on non-fire-rated 22, 33A, 35A, 98, and 99 Series rim devices. The dogging assembly on devices made after 1997 consists of four parts that are commonly replaced individually:

• 090040 Dogging Shaft: The piece the 5/32-inch hex key inserts into. The hole depth is only approximately 1/4 inch. The long version of the hex key is mandatory. Short keys round out the hex engagement over repeated use. This is the single most common dogging failure in the field.
• 090041 Dogging Spring: Activates the dogging hook. Occasionally fails and is sold individually.
• 090042 Dogging Adapter Spring: Clips the dogging adapter into the mounting bracket.
• 090043 Dogging Adapter: The housing the shaft and spring fit through.
• 090044 Dogging Hook: Grabs the push bar mechanism and holds the dogged position on 22, 33A, 35A, 98, and 99 Series devices made after 1997.

Von Duprin 090040 Hex Dogging Shaft. Order the replacement part.

For devices made before 1997, the old-style dogging shaft has a different dimensional profile. Part 050709 is the conversion kit that updates pre-1997 devices to current spec components.

The 88 Series crossbar devices use a 5/32-inch hex key for a different purpose: the wedgetite screw and dog screw in the lever arm assembly. This is not the same dogging operation as the push pad series, and the 88 Series dogging parts do not cross to push pad series.

For the complete 22 Series dogging assembly breakdown and part diagrams, see the Von Duprin 22 Series exit device parts guide. For the 33A and 35A Series, see the 22/33A/35A/55 Series guide.

Center Cases and Mechanism Cases

The center case is the primary mechanical housing of the exit device. It contains the latch mechanism, the dogging engagement, and the connection to the trim function. Center case specs differ by trim function within the same series, which is where most wrong-part orders happen.

The 22 Series rim center case (part 109012) has been in production for approximately 40 years and replaces all non-fire-rated 22 Series rim center cases with hex key dogging on the hinge-side cover plate. The 2227 SVR center case (part 109358) has been consistent for approximately 30 years. The 88 rim center case 050409 applies to EO, DT, and NL trim functions only. Lever, knob, and thumbpiece versions each use a different specification.

For 98/99 Series center case replacement, see the Von Duprin 98/99 Series exit device parts guide. For the 88 Series, see the 88 Series buyers guide.

Push Bar and Crossbar Components

The push bar on push pad devices and the crossbar on crossbar devices absorb direct operational load on every door use. Push bar end guides (part on 33A and 98/99 devices) reduce noise and friction at the end of the push bar assembly. Crossbar tube attaching wedges (090020) and rings (090021) secure the crossbar to the device body on the 88 and 55 Series.

Push bar retrofit kits are available for 22 Series rim devices in 36-inch and 48-inch configurations, replacing the push bar assembly without requiring a full device swap.

For rim device push bar maintenance cycles and common wear patterns, see the rim exit devices guide and the rim exit devices facility manager guide.

Strikes

Strike selection depends entirely on the device configuration and fire rating status. The table below covers the six strike types that apply across Von Duprin rim and SVR series:

Von Duprin 304L Vertical Rod Bottom Strike. Order the replacement part.

For fire door assembly requirements governing strike selection and annual inspection, see the commercial door fire rating guide and the NFPA 80 inspection guide.

Lever Arms and Axle Components (88 Series)

The 88 Series lever arm is replaced more frequently than any other mechanical component on crossbar devices. The cause is nearly always the same: the dogging screw strips out due to the wedgetite screw seating incorrectly. The right-hand lever arm kit is part 050438. The left-hand kit is 050439. Each includes the wedge, wedge ring, wedgetite screw, and dog screw.

For the complete 88 Series parts breakdown including lever arm, crossbar, and mechanism case specifications, see the Von Duprin 88 Series buyers guide and the 75/78/88/94/95/54 Series parts guide.

Top Latch and SVR Latch Components

For SVR configurations, top latch bracket replacement kits (050091 for 22/98/9927 Series) replace worn top latch assemblies. The 8827 bottom latch case (050461) covers all non-fire-rated 8827 SVR devices. Latch covers 050464 cover the top and bottom latches on the 8827 and the bottom latch only on the 8827-F fire-rated version.

For CVR (concealed vertical rod) device parts, including top and bottom latch assemblies and rod hardware for concealed-rod configurations, see the Von Duprin 9847 CVR guide and the Von Duprin 9947 CVR guide.

Electrified Upgrade Parts

Three electrified upgrade kits appear most often in parts orders on commercial facilities:

QEL Modular Conversion Kit (114317-00): Adds quiet electric latch retraction to a mechanical 22, 33A, 35A, or 98/99 Series device. Field-installable without opening the device body on current-generation hardware.

ALK Alarm Kit: Converts the 22, 33A, 35A, 98, or 99 Series to an alarmed exit device. Powered by a standard 9-volt battery. Controlled by a mortise cylinder (sold separately).

QEL Baseplate Conversion Kits: The QELA baseplate conversion kits (040063 for 36-inch devices, 040068 for 48-inch devices) are required on some older devices when adding QEL. The HD-QELA versions (040064 and 040068) cover heavy-duty applications.

For a direct comparison of QEL and MEL electrified latch retraction and when each applies, see the Von Duprin QEL vs MEL guide and the QEL conversion kit guide. For integrating electrified exit devices into an access control system, see the access control and commercial door hardware integration guide.

Mortise Device Parts

Mortise exit devices integrate a full mortise lock body into the panic hardware chassis, providing maximum security depth alongside panic egress. The Von Duprin 98/9975 and 8875 configurations use the 7500 mortise lock body. The 7500 uses its own complete set of internal mechanism parts separate from the rim and SVR device families.

For the complete 7500 mortise lock body component catalog with part diagrams, see the Von Duprin 7500 parts manual.

How to Source Exit Devices Parts Without a Wrong-Part Return

Most wrong-part orders on exit device parts come from searching by component name rather than by model. A dogging assembly listed under "Von Duprin dogging assembly" without a series designation could apply to a pre-1997 device, a post-1997 push pad device, or a crossbar device. The correct part depends on the series and generation.

Security Parts organizes the complete Von Duprin exit devices catalog by series and model. Every model page carries an interactive parts diagram showing the full assembly. Navigate to the correct series, open the diagram, confirm the component visually against the physical device, and place the order from the model-specific parts list. The 98/99 Series, 22 Series, and 88 Series each have their own dedicated pages with complete parts breakdowns.

For guidance on OEM versus aftermarket parts compatibility across Von Duprin exit devices, see the OEM vs aftermarket commercial door hardware guide. For the full commercial exit device parts reference across all categories, see the commercial exit device parts guide.

Same-day shipping on stocked components. Pre-order compatibility support at 845-935-0301 for specification questions before the order is placed.

Exit device parts sourcing is a model-first process, not a category search. The series, the configuration (rim vs SVR vs CVR vs mortise), the manufacturing year (pre-1997 vs post-1997 for dogging assemblies), and the trim function all determine which specific component applies to the device on the door. The dogging shaft 090040 requires the long hex key. The center case specification depends on the trim function, not just the series. The 1609 strike is not rated for fire doors. Starting with the model number before opening the exit devices parts catalog is what makes the first order the right order.

About the Author

This guide was written by the Security Parts team, a commercial door hardware specialist serving locksmiths, facilities managers, general contractors, and access control integrators since 2001. Security Parts carries the complete Von Duprin exit device parts catalog across all series and configurations, with same-day shipping on stocked components and pre-order compatibility support at 845-935-0301.