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Security Parts carries parts for the Von Duprin 75 and 78 Series pushpad devices (70 Series family), the 88 Series wide stile crossbar, the 94/95 INPACT recessed push pad series, and the 54 Series mullion line. The 75 is narrow stile; the 78 is wide stile. Both share the 70 Series QEL quiet electric latch option. The 88 Series crossbar tube (part 967738) is 42 inches and shared with the 55 Series, field-cut to size. The 88 lever arm is handed (050438 RH, 050439 LH); the dogging pin spring in the arm is a separate replaceable component. The INPACT 94/95 is a recessed push pad device for impact reduction. Mullion stabilizers (part 154) must be installed on every mullion to prevent security bypass via deflection.
Von Duprin's exit device catalog is broader than most facilities managers realize. Beyond the 98/99, 33A/35A, 22, and 55 Series covered elsewhere, there are four additional series that address specific application challenges: the 70 Series (75 narrow stile and 78 wide stile pushpad devices), the 88 Series (wide stile crossbar), the 94/95 INPACT Series (recessed push pad for impact-prone environments), and the 54 Series mullion line that enables rim devices on double-door openings.
Browse the complete Von Duprin parts catalog at SecurityParts.com for all series with interactive diagrams. For the full exit device catalog including Falcon alongside Von Duprin, browse the commercial exit devices catalog.
Von Duprin 70 Series: The 75 and 78 Pushpad Family
The Von Duprin 70 Series is the most recent generation of the Von Duprin pushpad exit device family, covering the 75 (narrow stile) and 78 (wide stile) models. These are positioned between the economy 22 Series and the premium 98/99 Series, offering heavy-duty construction for warehouse, industrial, office, multifamily, retail, and commercial real estate applications where the highest specification of the 98/99 is not required.
Von Duprin 75 Series
Narrow stile pushpad device for aluminum storefront and narrow frame commercial doors. Heavy-duty construction for warehouse, industrial, multifamily, retail, and commercial real estate. Available in rim, SVR, CVR, and wide door cable configurations. Supports QEL, RX, and E8875 electronic options. Fire-rated by adding F suffix. Field-reversible handing. Shares catalog (108004) with 78 Series and 70 Series QEL parts manual.
Von Duprin 78 Series
Wide stile pushpad device for standard hollow metal and wood commercial doors. Same application markets as the 75 but for wide stile door constructions. Available in rim, SVR, CVR, and wide door cable configurations. Full electronic option range matching 75 Series. Includes QEL quiet electric latch retraction option for applications where latch retraction noise is a concern.
70 Series Quiet Electric Latch Retraction (QEL)
The QEL option is the most important specification detail on the 70 Series (75 and 78) and 94/95 INPACT Series. Standard electric latch retraction (EL) on Von Duprin devices uses a solenoid that produces a distinct mechanical click when the latch retracts. In healthcare corridors, educational facilities, and quiet institutional environments, this noise is a complaint trigger from clinical staff and building management.
The Quiet Electric Latch Retraction (QEL) addresses this by using a motorized, slower-action latch retraction mechanism that significantly reduces the noise of electric latch operation. The QEL is available on devices sold after October 2014 on new installations. For pre-October 2014 devices, modular conversion kits allow upgrading existing non-EL panic or fire-rated devices to QEL without replacing the entire exit device.
70 Series Electronic Options
The 70 Series (75 and 78) supports the following electronic options. These are specified at ordering time and are not field-added without conversion kits.
| Option Code | Function | Application |
|---|---|---|
| QEL | Quiet Electric Latch Retraction | Healthcare, education, quiet institutional environments requiring electric latch with minimal noise |
| RX | Request to Exit switch | Access control integration: switch in exit device signals the controller when push bar is pressed |
| E8875 | External electric control | Allows device to pair with access control system, fire alarm system, or remote switching station |
| -F suffix | Fire-rated version | Any 70 Series device on a fire-rated door assembly |
Von Duprin 88 Series: Wide Stile Crossbar Parts
The Von Duprin 88 Series is a wide stile crossbar exit device for standard commercial hollow metal and wood doors. Where the 55 Series is the narrow stile crossbar for aluminum storefronts, the 88 is the wide stile crossbar for doors with 4-1/2 inches or more of stile width. The 88 Series has been in production since at least the 1950s and remains in the Von Duprin catalog because it serves two applications that pushpad devices cannot: traditional-looking wide stile installations where the crossbar aesthetic is an architectural requirement, and non-standard door widths where the field-cuttable crossbar can be sized precisely without special ordering.
88 Series Crossbar Tube: Part 967738
The Von Duprin 88 and 55 Series share the same crossbar tube (part 967738). The tube is 1 inch in diameter and 42 inches long. It ships at 42 inches and must be field-cut to the appropriate length for the specific door width using a tubing cutter or hacksaw. One side of the tube comes pre-cut with a slot for the wedge tite screw opening. This pre-cut slot must be positioned correctly when the crossbar is installed in the lever arm.
Tube Attaching Ring and Wedge Tite Screw
The tube attaching ring (part 090021) fits over each lever arm and is expanded by the wedge (part 88R90) and the wedge tite screw (part 88R100) to clamp the crossbar securely to the arm. The ring measures 15/16 inch long by 13/16 inch diameter. When tightened, the ring expands and holds the crossbar parallel to the door without visible fasteners on the front face of the bar.
A rattling crossbar or a crossbar that has dropped at one or both ends is almost always caused by loose wedge tite screws, not by failed components. The correct service is to tighten the wedge tite screw in each lever arm with a drop of blue thread-locker applied before final tightening. Thread-locker prevents vibration-induced loosening on high-cycle doors without making the screw impossible to remove for future service.
88 Series Lever Arm Assemblies
The 88 Series lever arm connects the crossbar to the center case mechanism. The lever arm is handed: right hand is part 050438, left hand is part 050439. Each arm includes the wedge, wedge ring, wedge tite screw, and dog screw. Some kits also include the axle.
Lever arm replacement is needed when the dogging screw in the arm has stripped (the most common failure reason according to field service records), when the arm is physically bent from impact, or when the axle has failed. The axle is a separately replaceable component: the current axle design (introduced around 1990) snaps together and replaces the older design that used allen-wrench-assembled axles. When replacing an axle, the separation tool is required to disassemble the current snap-together style.
The 88 Series Dogging Pin: The Failure Nobody Diagnoses
The Von Duprin 88 Series uses a dogging pin mechanism located on the underside of the active lever arm to hold the crossbar in the depressed position during business hours. This is different from the hex key slot used on the 22, 33A, and 98/99 Series. The dogging pin has an internal spring that provides the retention force.
88 Series Field-Reversible Handing
The 88 Series is field-reversible for handing. This means the device can be converted from right-hand to left-hand or vice versa in the field without returning the device for a factory conversion. This saves the project when door handing has been incorrectly specified: a Friday afternoon discovery that the device is the wrong hand can be corrected on-site rather than requiring a return and reorder. Confirm handing before installation regardless, but this reversibility is a genuine specification advantage over devices requiring factory handing.
88 Series Mounting Screw Package
The 88 Series mounting screw package (part 900503) includes 12 screws in two types: 6 machine screws and 6 hybrid screws (for the 88C/C or E/C mounting configurations). Always use the correct screw type for the specific mounting configuration. Using only machine screws on a hybrid mounting leaves the device with reduced pull-out resistance at the center case anchor points.
Von Duprin 94/95 INPACT Series: Recessed Push Pad Parts
The Von Duprin INPACT 94/95 Series is the only fully recessed exit device in the Von Duprin commercial line. Instead of a push pad that projects outward from the door face, the INPACT push pad sits within a routed recess in the door so the pad face is flush with or set back slightly from the door surface. From a distance, the device appears to be part of the door panel rather than hardware mounted to it.
Why the Recessed Design Exists
The recessed design solves a specific problem in high-traffic environments where equipment regularly passes through doorways: medical facilities with gurney traffic, emergency departments with IV pole carts, warehouses with pallet jacks. On these doors, a projecting push pad takes repeated equipment impact that bends the pad, loosens the mechanism case, and damages the door itself over time. The INPACT's recessed pad eliminates the protrusion that equipment contacts, extending the device's service life dramatically on impact-prone doors.
94 vs 95 Series
The 94 Series has a grooved push pad surface. The 95 Series has a smooth push pad surface. Both are mechanically and dimensionally identical. All internal parts are shared between 94 and 95. The choice between them is purely aesthetic and is made at specification time based on building design preference. When ordering replacement parts for either series, the part numbers are the same.
INPACT Door Preparation Requirements
The INPACT 94/95 requires a routed recess in the door face for the mechanism case. This prep is built into the door during manufacturing. Steelcraft hollow metal doors are specifically listed as compatible with the standard INPACT door prep. If an INPACT device must be installed on a door that was not prepped at manufacturing, the door must be routed in the field to the INPACT specification, which requires a different site operation than standard exit device installation.
INPACT Electronic Options
The INPACT 94/95 Series supports Quiet Electric Latch Retraction (QEL) and field-reversible handing. The QEL option makes the INPACT particularly well-suited to healthcare corridor applications where both impact protection (recessed pad) and quiet electric latch operation are specified simultaneously. These two features together address the two most common exit device complaints in healthcare: equipment impact damage and latch noise in patient care areas.
Von Duprin 54 Series Mullions: Parts and Critical Security Considerations
A mullion is a vertical structural member that mounts between the two leaves of a double-door opening to provide a fixed strike-receiving element for rim exit devices. Without a mullion on a double-door opening, a rim exit device has no fixed jamb to mount a strike to. The rim latch would have no receptacle, and the door pair could not latch.
Why Mullions Matter for Fire Door Code Compliance
On fire-rated double-door openings, the code governing whether a rim exit device is permitted or a concealed vertical rod device is required turns on whether a mullion is present. A rim exit device on a fire-rated pair without a mullion is a non-compliant installation: the rim strike mounts to the active door leaf, which is not a fixed structure and cannot provide the fire-resistive separation required by the door assembly listing. With a fixed or removable mullion providing a fixed strike location, rim exit devices are permitted on most fire-rated pairs. Without a mullion, concealed vertical rod devices are required.
54 Series Mullion Types
| Model | Material | Type | Key Notes |
|---|---|---|---|
| 5654 | Aluminum | Fixed surface mullion | Standard mullion for most double-door exit device applications. Prepped for two 299 strikes. Ships with 154 mullion stabilizers. 11/16 inch wide on door face, 2-3/8 inch at widest, 3-1/8 inch deep, 1/8 inch wall thickness. Available in 7'2" standard height. |
| 5754 | Steel | Fixed surface mullion | Steel version of the 5654. Higher strength for high-abuse applications. Same mounting and strike preps as the 5654. |
| 1654 | Steel | Removable mullion | Can be released and retracted to allow full-width double-door passage (deliveries, furniture moves, oversized equipment). Mortise cylinder controls removal on keyed removable versions. |
| 4954 | Steel | Removable mullion | Keyed removable steel mullion. Single cylinder operation releases and retracts the mullion. KR54 retrofit kit available to upgrade existing 1654 and 4954 mullions to keyed removable operation without replacing the full mullion. |
Mullion Fittings and Covers
The top fitting and cover (part 050135) and the bottom fitting (part 050190) are the end cap assemblies for the 5654 and 5754 mullions. The fitting set (part 050130) includes both top and bottom fittings with all mounting screws. When a mullion fitting is damaged from impact or the fasteners have stripped, the fitting is a separately replaceable component. Always confirm whether the damage is to the fitting only or to the mullion tube body itself before ordering, as these are different parts.
Mullion Stabilizer: The Security Component Nobody Installs
The Von Duprin 154 mullion stabilizer package is included in the box when the 5654 aluminum mullion is purchased. It is the most overlooked component on every mullion installation.
The stabilizer prevents lateral deflection of the mullion under door abuse and impact loading. When a mullion deflects sideways from someone pushing or shaking a door hard, the deflection moves the strike out of alignment with the rim latch on both door leaves simultaneously. This causes both exit devices to release, effectively opening the entire double-door opening without any key, credential, or authorized access event. The 154 stabilizer braces the mullion against the door frame, preventing this deflection and maintaining strike alignment under impact.
Weather Stripping for Mullions
The Von Duprin weather stripping (part 050580) is specific to the 5654 and 5754 mullions. Each strip is 10 feet long. Two strips are required per mullion (one on each side of the mullion facing the door leaves). This is an often-omitted component on interior mullion installations but a required component on exterior door applications where the mullion must provide an air and weather seal against the door leaves.
How to Identify the Correct Series and Parts
Five questions determine the correct parts before any order for these series.
1. Is this a pushpad, crossbar, or recessed device? Crossbar spanning the door width = 88 Series (or 55 if narrow stile). Recessed pad flush with door face = 94/95 INPACT. Projecting rectangular pushpad = 75 or 78 Series (or 22, 33A, 98/99 from other series). If in doubt, check the label on the mechanism case.
2. Is the door stile narrow or wide? Narrow stile aluminum storefront = 75 Series (pushpad) or 55 Series (crossbar). Wide stile hollow metal or wood = 78 Series (pushpad) or 88 Series (crossbar). The 88 requires a minimum 4-1/2 inch stile.
3. For mullion parts: is the mullion fixed or removable? A mullion with no visible release mechanism is fixed (5654 or 5754). A mullion with a cylinder or lever release is removable (1654 or 4954). Removable mullions use different fittings from fixed mullions.
4. For 88 Series crossbar parts: is the failure the crossbar tube, the lever arm, or the dogging pin spring? Rattling or dropped crossbar = wedge tite screw loose, no parts needed. Stripped dogging in arm = dogging pin spring first, lever arm assembly only if spring replacement fails. Bent or broken arm body = lever arm assembly replacement (050438 RH or 050439 LH).
5. For INPACT parts: confirm the trim series is 94/95-specific. INPACT trim (940, 550 for INPACT, 376) is not interchangeable with standard Von Duprin trim. Ordering standard trim for an INPACT installation produces parts that physically will not seat in the recessed door prep geometry.
Browse the Von Duprin parts catalog at SecurityParts.com for 75, 78, 88, 94/95 INPACT, and 54 Series mullion components with interactive diagrams. For the full exit device catalog including Falcon exit devices, browse the commercial exit devices catalog. For Von Duprin electric strike parts, browse the electric strikes catalog. Pre-order support is at 845-935-0301 or the contact page.
Why Choose Security Parts for These Von Duprin Parts
Dogging pin spring diagnosis, mullion stabilizer security impact, QEL conversion kit guidance, INPACT trim incompatibility warning, and same-day shipping.
Dogging Pin Spring First
We document the dogging pin spring as the correct first replacement for 88 Series dogging failures, not the lever arm. This single fact prevents most unnecessary lever arm orders on 88 Series dogging complaints.
Mullion Stabilizer Warning
We document the 154 stabilizer as a security-critical component that prevents physical bypass of secured double-door openings via mullion deflection. No other parts supplier makes this explicit at the ordering stage.
QEL Conversion Guidance
We document the QEL modular conversion kit for 70 Series devices sold after October 2014, eliminating the need for full device replacement when only quieter latch retraction is needed.
Same-Day Shipping
Most 75, 78, 88, INPACT, and mullion parts ship same day from US warehouses. Call 845-935-0301 or use the contact page for series identification support.
What Makes Security Parts Different for These Von Duprin Parts
- We document the dogging pin spring as the first-check replacement for 88 Series crossbar dogging failures. The spring prevents a $150 lever arm order when only a $5 spring has failed. This is undocumented at all competitor parts suppliers.
- We document the mullion stabilizer 154 as a security-critical component that closes a documented physical bypass vulnerability on unsupported mullion installations. No other parts supplier explains what happens without the stabilizer.
- We explain the fire door code context: a rim device on a fire-rated pair is only permitted when a mullion is present. Without a mullion, concealed VR devices are required. This code context determines whether a mullion purchase is a preference or a code compliance requirement.
- We document the INPACT 94/95 Series trim incompatibility. Standard Von Duprin trim will not fit an INPACT installation. This prevents wrong-trim orders that generate returns and installation delays on healthcare projects.
- We carry these Von Duprin parts alongside electric strike parts, exit alarm parts, LCN door closer parts, Schlage cylindrical lock parts, and mortise lock parts for complete building service in one order.
- Free shipping on orders over $450. Same-day shipping from US warehouses. 30-plus years of commercial door hardware experience.
Related Parts and Products at Security Parts
Von Duprin 75, 78, 88, and INPACT exit devices appear on the same doors as electric strikes, door closers, and cylindrical locks. Mullions appear on double-door openings that also typically include one of these exit device series.
For Von Duprin electric strike parts on 75, 78, 88, or INPACT rim device installations with controlled entry, browse the electric strikes catalog. For exit alarm parts including Von Duprin Guard-X and Detex ECL and EAX for secondary exit monitoring, browse the exit alarms catalog. For LCN door closer parts on fire-rated egress doors in the same building, browse the door closers catalog. For Schlage ND and ALX Series cylindrical lock parts on interior doors in the same facility, browse the cylindrical locks catalog. For Falcon 19, 24, and 25 Series exit device parts as an alternative brand on newer construction egress doors in the same building, browse the Falcon hardware catalog.
Browse the complete all products and parts catalog to source Von Duprin, Schlage, LCN, Falcon, and Detex hardware across the complete facility in a single session.
Frequently Asked Questions About Von Duprin 75, 78, 88, 94/95 and 54 Series Parts
What is the difference between the Von Duprin 75 and 78 Series exit devices?
Both are pushpad devices in the 70 Series family, sharing the same QEL quiet electric latch option and full configuration range. The 75 is narrow stile for aluminum storefront and narrow frame commercial doors. The 78 is wide stile for standard hollow metal and wood doors. Both support rim, SVR, CVR, and wide door cable configurations and the same electronic options including QEL, RX, and E8875.
What is the Von Duprin 88 Series crossbar and how is it replaced?
The 88 Series crossbar tube (part 967738, shared with 55 Series) is 1 inch in diameter and 42 inches long, field-cut to fit. It is held to the lever arms by the tube attaching ring (090021) and wedge tite screw (88R100). A rattling or dropped crossbar is almost always loose wedge screws, not a failed component. Retighten with blue thread-locker. Full lever arm replacement (050438 RH, 050439 LH) is needed when the dogging screw in the arm is stripped or the arm body is damaged.
What is the dogging pin on the Von Duprin 88 Series and when does it fail?
The dogging pin on the underside of the 88 active lever arm holds the crossbar in the depressed position. Its internal spring wears and fails, preventing the crossbar from staying dogged. The spring is a separately replaceable component, much less expensive than a full lever arm assembly. Always check the dogging pin spring before ordering a lever arm when the 88 Series will not dog.
What is the Von Duprin 94/95 INPACT Series and what makes it different?
The INPACT is a fully recessed exit device where the push pad sits within the door face rather than projecting outward. It eliminates impact damage from carts and equipment in healthcare and high-traffic corridors. The 94 has a grooved pad; the 95 has a smooth pad. Both are mechanically identical. INPACT requires a routed door prep and uses its own dedicated trim (940, 550, 376) that is not interchangeable with standard Von Duprin trim. Supports QEL for quiet electric latch operation.
What is a Von Duprin 54 Series mullion and when is one required?
A mullion is a vertical member between double doors providing a fixed strike for rim exit devices. The 54 Series covers fixed aluminum (5654), fixed steel (5754), and removable steel (1654, 4954) mullions. On fire-rated double-door pairs, a rim exit device can only be used if a mullion is present. Without a mullion, concealed vertical rod devices are required by code.
What is the Von Duprin mullion stabilizer and why is it critical?
The 154 mullion stabilizer prevents lateral deflection of the mullion under impact or door abuse. Without the stabilizer, the mullion can be deflected by physical force, which simultaneously releases the rim latches on both door leaves and bypasses the secured opening without any credential. The 154 is included with the 5654 aluminum mullion and must be installed on every mullion on a security-sensitive double-door opening.