The Von Duprin 98/99 Series is one of the most widely installed exit device lines in North American commercial construction. You'll find these devices on the doors of schools, hospitals, government buildings, and office complexes across the country -- and for good reason. They're robust, ANSI/BHMA Grade 1 rated, and backed by decades of field-proven performance.

The 98 and 99 are essentially the same device with one visible difference: the 98 Series has a smooth mechanism case, while the 99 Series has a grooved case. Functionally, they share the same internal architecture, the same parts, and the same mounting footprint. That means if you're stocking repair parts for a building with both versions, most components are interchangeable.

What Parts Are Available

SecurityParts.com stocks the full range of OEM Von Duprin replacement components for the 98/99 Series, including:

• Center case kits and mechanism cases -- the core of the device, containing the latch retraction mechanism
• Baseplates and baseplate screw packs -- the mounting foundation that transfers force from the push bar to the latch
• Latch bolts and rod assemblies -- critical for proper door latching on both rim and vertical rod configurations
• Cylinder dogging kits (CD) and hex dogging components (HD) -- for hold-open functionality on high-traffic doors
• End cap kits (standard and impact-resistant) -- protect the ends of the device from physical damage in heavy-use corridors
• Electrified option components (EL, QEL) -- solenoids, plungers, and conversion kits for electric latch retraction
• Chexit (CX) delayed egress parts -- for controlled-exit applications in healthcare and retail
• Mortise lock bodies and 7500-series components -- for mortise function configurations

Choosing the Right Parts

The 98/99 Series spans multiple sub-models: the standard rim (98/99), surface vertical rod (98/9927), and concealed vertical rod (98/9947, 9949, 9950) configurations. The SVR and CVR variants use different rod assemblies and end cases from the rim versions, so confirming your exact model before ordering matters.

On the electrified side, EL (Electric Latch Retraction) and QEL (Quiet Electric Latch Retraction) units use different solenoid assemblies. The QEL's noise-dampened design is common in healthcare settings where door slam reduction matters.

Why Source Parts Instead of Replacing the Device

A complete Von Duprin 99 device costs significantly more than the specific part that failed. The center case, which contains the rack and pawl mechanism, is the most common failure point in heavy-traffic installations. Replacing just the center case -- which SecurityParts.com stocks in both standard and less-cover configurations -- restores full function for a fraction of the cost of a new unit.

Same logic applies to baseplates, latch bolts, and dogging components. These parts wear independently of the rest of the device. Knowing which component failed, and having it in stock, is the difference between a 15-minute repair and a full device swap.