The Von Duprin 7500 parts manual covers the mortise lock that pairs with the Von Duprin 88 Series mortise exit device line. The 7500 itself is a field-reversible mortise lock with a non-handed auxiliary bolt for deadlocking, an adjustable-bevel faceplate, and field-selectable TP and K functions. The E7500 is the electrified variant with electric locking or unlocking options. The SS-7500 is the stainless steel build.

That's the short version. If you're pulling parts off a hardware schedule or troubleshooting a service call, the longer version is what determines whether you order the right component the first time. This guide walks through the 7500 mortise lock anatomy, function selection, exit device pairing, electric strike compatibility, and how to source replacement parts without misordering.

What the Von Duprin 7500 Mortise Lock Is

The Von Duprin 7500 is the mortise lock designed to operate as the inside locking mechanism for the Von Duprin 88 Series mortise exit device. The 88 Series is the panic hardware on the door. The 7500 is the mortise lock body that handles the latch and bolt work behind it. They're sold and specified together as a system on commercial doors that need both panic egress and mortise-lock security.

Three things make the 7500 unusual compared to a generic mortise lock. The lock is field reversible without removing it from the door, which cuts install and service time substantially. The auxiliary bolt is non-handed, which means it works on either swing direction. And the faceplate carries an adjustable bevel, so the lock can adapt to door edge angles without ordering a different SKU. Those three properties together are why the 7500 stays on spec sheets even as newer mortise hardware enters the market.

7500 vs E7500 vs SS-7500: Identifying the Variant You Have

The Von Duprin 7500 ships in three primary variants, and the parts manual breakdown is different for each one.

The standard 7500 is the mechanical mortise lock. No electrification, no monitoring switches. This is the variant on most older Von Duprin 88 Series installs.

The E7500 is the electrified version. It carries the same chassis as the mechanical 7500 but adds electric locking or unlocking through the outside trim. Two SPDT signals monitor trim condition and latchbolt status. Power options include 12V DC, 24V DC, and AC variants with available solenoid kits (SO12, SO24). The E7500 is what's specified on access-controlled commercial openings.

The SS-7500 is the stainless steel build. Same function set as the standard 7500 but with the corrosion-resistant body and faceplate. Common in coastal installs, food processing facilities, and any environment where the mortise lock has to survive humidity and washdown.

Pull the lock face off the existing door and read the model designation before ordering parts. The 7500, E7500, and SS-7500 share many components but not all of them. Cylinder housings, trim spindles, and latch assemblies cross. Solenoid assemblies, electrical kits, and monitoring switches are E7500 specific.

Function Options on the Von Duprin 7500

The 7500 ships with field-selectable functions, which is one of its strongest features for inventory and service. The two primary functions are TP (thumbpiece) and K (keyed). Function selection happens through a set screw in the mortise lock body. Turning the set screw down switches between TP and K function without disassembling the lock.

That field selectability matters when you're servicing a building with mixed openings. One stocked 7500 can be configured for either function at the door, instead of stocking two SKUs. For procurement teams managing replacement parts across a portfolio of buildings, this drops inventory complexity meaningfully.

The E7500 adds electric lock and electric unlock function variants on top of the mechanical function selection. The choice between electric lock (the trim is normally unlocked, locks when energized) and electric unlock (the trim is normally locked, unlocks when energized) is set at order, not field selectable.

Components in the Von Duprin 7500 Parts Manual

The 7500 mortise lock breaks down into these core component groups, listed in the order you'll typically encounter them during service:

Mortise lock case with internal mechanism. The lock body itself. Replaced as a complete unit on most failures.

Faceplate with adjustable bevel. Field replaceable. Bevel adjusts to door edge angle.

Auxiliary bolt (non-handed). Deadlocks the main latch when the door is closed. One of the highest-wear components on heavily cycled doors.

Main latchbolt. The latch that engages the strike. Stainless steel on most production runs.

Trim spindles and connecting hardware. Link the inside and outside trim to the lock body. Worn spindles cause loose trim feel and eventually lever droop.

Cylinder housing. Accepts the keyway cylinder. The 7500 typically takes a Schlage-prep mortise cylinder, which means common Everest 29 or Primus cylinders fit directly.

Set screw for function selection. Located in the lock body. Turns to switch between TP and K functions.

Solenoid assembly (E7500 only). Drives the electric lock or unlock mechanism. Solenoid power draw varies by voltage: roughly 0.38 amps at 12V DC, 0.19 amps at 24V DC.

Monitor switches (E7500 only). Two SPDT signals for trim and latchbolt status. Wired to the access control panel.

Strike pocket insert. Specified for 7500 mortise lock compatibility with Von Duprin 6212WF and similar electric strikes. Furnished with the strike, not the lock.

Compatible Exit Devices and Electric Strikes

The Von Duprin 7500 mortise lock was designed to work with the Von Duprin 88 Series mortise exit devices. That's the canonical pairing. The 8875-F mortise lock fire exit device pairs directly with the 7500 for UL-listed 3-hour fire door assemblies on single and double 4-foot by 8-foot openings.

For electric strike compatibility, the Von Duprin 6200 Series strikes are the matched pair. Specifically, the 6211, 6211AL, 6211WF, 6212, 6213, 6214, 6215, 6221, 6222, 6223, 6224, 6224AL, 6225, and 6226 strikes are factory-listed as 7500 mortise lock compatible. The 6210 strike is the direct replacement for legacy Von Duprin 3146 applications and also pairs with the 7500. The 6212WF includes a strike pocket insert specifically engineered for 7500 mortise lock mounting.

When sourcing an electric strike for a 7500 mortise lock door, confirm the strike compatibility chart on the strike's spec sheet before ordering. The mounting tabs and pocket dimensions differ between Von Duprin's own strike lines and surface-applied alternatives.

How to Identify a Von Duprin 7500 Before Ordering Replacement Parts

Three checks before placing a parts order. Each one prevents a return.

First, confirm it's a 7500 and not a 7400 or other Von Duprin mortise line. The 7500 family stamps the model number on the lock face. Remove the trim, look at the lock face for the model designation, and read it directly.

Second, identify the variant. Mechanical 7500, electrified E7500, or stainless SS-7500. The body finish gives you the SS variant immediately. The presence of wiring leads coming out of the lock body identifies the E7500.

Third, identify the function. TP function (thumbpiece trim) vs K function (keyed trim). Look at the existing outside trim. A thumbpiece-style trim is TP. A keyed lever or knob with no thumbpiece is K. If the function needs to change during service, the set screw inside the lock body switches it without ordering different parts.

Common Service Issues and Which Parts to Replace

Three failure patterns dominate Von Duprin 7500 service calls.

Auxiliary bolt wear. The deadlocking auxiliary bolt sees high cycle counts on heavily used doors and eventually loses spring tension or shows visible wear at the engagement face. Replace as a single component.

Trim spindle wear or loose lever feel. The spindle connecting outside trim to the lock body wears over time, particularly on doors that get pulled rather than pushed. The lever or thumbpiece develops play. Replace the spindle assembly rather than the full lock body.

E7500 solenoid failure. Most often traced to wrong voltage at the lock terminals, transient voltage from solenoid-based hardware on the same circuit, or simple end-of-life on a high-cycle door. Confirm voltage and transient suppression before replacing the solenoid. A motor that fails inside a year is usually an install problem, not a hardware defect.

How to Source Von Duprin 7500 Replacement Parts

For mechanical 7500 components, source by part type: faceplate, auxiliary bolt, latchbolt, trim spindle, cylinder housing. Each is available as an individual replacement. The Von Duprin parts catalog on Security Parts indexes by series.

For E7500 electrical components, confirm voltage (12V DC, 24V DC, or AC) before ordering. Solenoid assemblies are voltage-specific. Order the matching SO12 or SO24 kit for AC operation. Note that 16V DC and 28V DC solenoids are stocked as replacement parts only for existing legacy strikes, not new builds.

For complete 7500 mortise lock replacement, order by full SKU including function (TP or K) and finish. Stainless variants (SS-7500) carry their own ordering line. Cross-reference exit device compatibility with the Von Duprin 88 Series exit devices when replacing the lock as part of a system service.

For electric strike replacement matched to a 7500, the Von Duprin electric strike line carries the 6200 Series strikes that pair with the 7500 mortise lock. Confirm strike model number against the 7500 compatibility chart before ordering.

For configurations not visible online, call 845-935-0301. Two minutes of spec verification on the phone prevents the wrong-configuration return cycle on a service call that probably doesn't have those days to spare.

Frequently Asked Questions

What is the Von Duprin 7500 used for?

 The Von Duprin 7500 is a mortise lock designed to pair with the Von Duprin 88 Series mortise exit devices. It handles the latch and bolt work on commercial doors that need both panic egress hardware and a mortise lock body.

Is the Von Duprin 7500 field reversible?

 Yes. The 7500 mortise lock can be reversed for opposite hand without removing the lock from the door. The auxiliary bolt is non-handed, which means it operates correctly in either swing direction.

What's the difference between Von Duprin 7500 and E7500? 

The 7500 is the mechanical mortise lock. The E7500 is the electrified variant with electric locking or unlocking through the outside trim, plus two SPDT signals for trim and latchbolt monitoring. The E7500 ships in 12V DC, 24V DC, or AC configurations.

How do I switch between TP and K function on a Von Duprin 7500? 

Function selection is field-adjustable through a set screw in the mortise lock body. Turning the set screw down switches between TP (thumbpiece) and K (keyed) function without disassembling the lock.

Which electric strikes work with a Von Duprin 7500? 

The Von Duprin 6200 Series strikes are factory-listed as 7500 compatible. Specifically the 6210, 6211, 6212, 6213, 6214, 6215, 6221, 6222, 6223, 6224, 6225, and 6226 strikes. The 6212WF includes a strike pocket insert engineered for 7500 mortise lock mounting.

Is the Von Duprin 7500 fire rated?

 The 7500 mortise lock is used on UL-listed fire door assemblies when paired with the 8875-F mortise lock fire exit device, supporting 3-hour fire ratings on single and double 4-foot by 8-foot openings.

What voltage does the E7500 solenoid require? 

The E7500 ships in 12V DC, 24V DC, and AC variants. Power requirements are approximately 0.38 amps at 12V DC and 0.19 amps at 24V DC. AC operation requires the SO12 or SO24 solenoid kit.

Where can I source Von Duprin 7500 replacement parts? 

Security Parts stocks the Von Duprin 7500 mortise lock and component-level parts including auxiliary bolts, faceplates, trim spindles, cylinder housings, and E7500 solenoid kits. Call 845-935-0301 for configurations not visible online.

Closing

The Von Duprin 7500 mortise lock is one of the longest-running commercial mortise lines still on active service catalogs. It's on hardware schedules across institutional buildings, healthcare facilities, and K-12 schools that were built or renovated in the last twenty years. When a 7500 needs service, the parts manual breakdown above is what determines whether the right component gets ordered or whether the door stays out of service for an extra week.

Source it from a distributor that stocks both the 7500 mortise lock and the matched 88 Series exit devices on the same line. Security Parts has carried Von Duprin commercial hardware since 2001, with same-day shipping on stocked components and spec verification by phone at 845-935-0301 for configurations that need a second set of eyes.