Von Duprin 9875F-3FT Fire Rate...
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Von Duprin 9875-F Series - Fire Rated 3 ft Smooth Case Wide Stile Mortise Exit Device, Less Dogging

Von Duprin 9875F-3FT Fire Rated Wide Stile Mortise Exit Device, 36" Smooth Case, Less Dogging

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Model: 9875EO-F 3 US26D
$3,251.00
$2,275.70
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Von Duprin 9875F-3FT Fire Rated Wide Stile Mortise Exit Device, 36" Smooth Case, Less Dogging

Commercial-Grade Fire Rated Mortise Exit Device for Demanding Institutional Applications

The Von Duprin 9875F-3FT is a fire rated, wide stile mortise exit device from the renowned 98/99 Series, engineered for high-use institutional environments including schools, hospitals, and government buildings. Featuring a smooth mechanism case and a 36" product size, this device is certified to ANSI/BHMA A156.3 2014 Grade 1 standards and carries ANSI/UL 10C fire-rated listing, ensuring compliance with the most demanding life-safety codes. Designed for single and double doors with mullion, the 9875F-3FT accommodates door thicknesses of 1-3/4" and delivers a 3/4" latch throw with a center case measuring 8" x 2-3/4" x 2-3/8" and a product projection of 3-13/16". Fasteners are included for wood or metal doors 1-3/4" and 2-1/4" thick, and the device is non-handed for straightforward installation.

Professional Features & Benefits

  • Fire Rated Compliance: Certified to ANSI/UL 10C and CAN/ULC-S104 fire-rated standards, ensuring full compliance with fire-exit hardware requirements in commercial and institutional facilities.
  • ANSI/BHMA Grade 1 Certified: Meets ANSI/BHMA A156.3 2014 Grade 1, ANSI/UL 305, and CAN/ULC-S132 certifications — the highest industry standards for panic exit hardware performance and durability.
  • Smooth Case Wide Stile Design: The 98 Series smooth mechanism case and wide stile push pad provide an architectural aesthetic suited for high-traffic institutional applications, with a center case dimension of 8" x 2-3/4" x 2-3/8".
  • Precise Latch & Projection Specs: Features a 3/4" latch throw and a product projection of 3-13/16", engineered for reliable latching performance on 36" doors with 1-3/4" door thickness.
  • Non-Handed Configuration: The device is non-handed (except when specific options such as SD, -2, or SS are applied), simplifying specification and reducing installation complexity.
  • Inclusive Fastener Package: Includes fasteners compatible with wood or metal doors 1-3/4" and 2-1/4" thick, supporting versatile installation across common commercial door constructions.
  • Field-Configurable & Retrofit-Ready: A variety of field-configurable options are available, including retrofit kits (CDSI/HDSI dogging indicators, QEL electronic latch retraction, RX/LX electronic switches) to keep pace with evolving facility technology needs.
  • Broad Device Type Availability: The 98/99 Series supports rim, surface-mounted vertical rod (27), concealed vertical rod with 5/8" bottom bolt (47), concealed vertical rod with 1-1/2" bottom bolt (48), concealed vertical cable (49), 1-point concealed vertical cable (52), 3-point latching (57), and mortise lock (75) configurations.
  • ADA & Delayed Egress Upgrade Options: Upgradeable to AX (ADA-compliant, certified to 5 lb. force requirements per 2010 ADA Chapters 404.2.7 and 30934) or CX CHEXIT (NFPA/IBC delayed egress, 15-second hold with nuisance alarm).

Technical Specifications

  • Series: 98 & 99 Series
  • Grade: Grade 1
  • Fasteners: Included for wood or metal doors 1-3/4" and 2-1/4" thick
  • Product Group: Exit Devices and Trim
  • Product Subgroup: Exit Devices - Mortise
  • Product Type: Exit Devices - Mortise
  • Subcategory: Mortise Exit Devices
  • Latch Throw: 3/4"
  • Commercial/Residential: Commercial
  • Stile Type: Wide Stile
  • Center Case Dimensions: 8" x 2-3/4" x 2-3/8"
  • Wood Door Compatible: No
  • MAP Policy: Yes
  • Product Model: 9875F-3ft
  • Door Hand Direction: Non-Handed
  • Door Thickness Range: 1-3/4"
  • Product Size: 36"
  • Dogging Configuration: Less Dogging
  • Fire Rating: Yes
  • Product Projection: 3-13/16"
  • Product Style: Push Pads
  • Product Category: Exit Devices and Trim
  • Department: Door Hardware

Professional Applications

  • Educational Facilities and Schools
  • Healthcare Institutions and Hospitals
  • Government and Municipal Buildings
  • Commercial Office Buildings
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Retail Establishments Requiring Fire-Rated Egress Compliance

Delayed Egress Compliance

The 9875F-3FT is upgradeable to the CX CHEXIT configuration, which meets NFPA and IBC requirements for delayed egress applications. In this configuration, a standard device keeps doors secure for 15 seconds after a request to exit while a nuisance alarm sounds, providing code-compliant delayed egress functionality for facilities requiring controlled exit management.

Why Choose Von Duprin Quality?

Von Duprin mortise exit devices from the 98/99 Series are certified to ANSI/BHMA A156.3 2014 Grade 1 — the highest industry standard — and carry ANSI/UL 10C fire-rated listing for dependable life-safety performance. The 9875F-3FT features a smooth wide stile mechanism case with precise dimensional engineering, including an 8" x 2-3/4" x 2-3/8" center case and 3-13/16" projection, purpose-built for demanding institutional environments. Engineered for schools, hospitals, and government facilities where reliable, code-compliant egress hardware is non-negotiable, Von Duprin delivers the professional-grade performance that commercial applications demand.

Manufacturer Resources

Von Duprin 98/99 Series Catalog

Product Specs

Series:
98 & 99 Series
Grade:
Grade 1
Fasteners:
Included for wood or metal doors 1-3/4" and 2-1/4" thick
Product Group:
Exit Devices and Trim
Product Subgroup:
Exit Devices - Mortise
Product Type:
Exit Devices - Mortise
Subcategory:
Mortise Exit Devices
Latch Throw:
3/4"
Commercial/Residential:
Commercial
Stile Type:
Wide Stile
Center Case Dimensions:
8" x 2-3/4" x 2-3/8"
Wood Door Compatible:
No
MAP Policy:
Yes
Product Model:
9875F-3ft
Door Hand Direction:
Non-Handed
Door Thickness Range:
1-3/4"
Product Size:
36"
Dogging Configuration:
Less Dogging
Fire Rating:
Yes
Product Projection:
3-13/16"
Product Style:
Push Pads
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Von Duprin 9875EO-F 3 US26D – Frequently Asked Questions

1) Will the Von Duprin 9875F mortise exit device fit a 1-3/8 inch door?
No. The 9875F is built for 1-3/4 inch doors only, so a 1-3/8 inch leaf is out of range. Fasteners ship in the box for wood or metal doors at 1-3/4 inch and 2-1/4 inch thickness, so a thicker leaf is covered on the fastener side, but the device itself is specified at 1-3/4 inches. Measure the leaf at the lock edge before ordering.
2) Is the Von Duprin 9875F fire rated, and what standards does it carry?
Fire rated, yes. The 9875F carries ANSI/UL 10C and CAN/ULC-S104 fire listings, and it is certified to ANSI/BHMA A156.3 2014 Grade 1 along with ANSI/UL 305 and CAN/ULC-S132 for panic hardware. That combination is what a fire-rated opening in a school, hospital, or government building needs on the egress side. Note it is a less-dogging device, which is correct for a fire door: fire rated exit devices must latch on every cycle and cannot be held retracted mechanically.
3) Why does the 9875F have no dogging, and how do I hold the door in a push-pull state during business hours?
Less dogging is not an omission, it is a requirement of the fire rating. A mechanically dogged device would leave a fire door unlatched, so fire rated exit devices ship without it. If you need the door free during the day on a fire rated opening, the electrical route is the answer: the 9875F can be ordered with EL electric latch retraction, QEL quiet electric latch retraction, or PN pneumatic latch retraction, all of which release the latch on command and let it re-latch on fire alarm.
4) Do I have to specify a hand when ordering the Von Duprin 9875F?
The device itself is non-handed, but the order still takes a handing selection, RHR or LHR, and certain options (SD, -2, SS) make it handed. Because it is a mortise device, the lock case and the trim have to face the right way even when the chassis is reversible, so get the hand right off the door: stand outside the door, and if the hinges are on your right with the door swinging toward you it is right hand reverse.
5) Will a Von Duprin 9875F work on a pair of doors?
Yes, on single doors and on pairs when a removable mullion is used. A mortise device latches into the frame at the strike edge, so on a pair it needs something to latch into at the center, which is what the mullion provides. If you need a pair with a clear opening and no mullion in the way, that is a job for a vertical rod device instead: the 98/99 Series covers surface vertical rod (27), concealed vertical rod (47 and 48), concealed vertical cable (49 and 52), and 3-point latching (57) in the same family.
6) Will the 9875F latch into my existing mortise strike?
The latch throws 3/4 inch, which is the standard mortise exit device throw, so it will engage a mortise lock strike with the usual pocket depth. What decides the retrofit is not the throw but the door prep: this is a mortise device, so the door edge must already carry a mortise lock pocket in the right location. If your existing opening has a rim device or a cylindrical lock prep, the edge will need to be prepped or the door replaced.
7) I need an ADA compliant exit device under 5 pounds of operating force. Does the 9875F do that?
Order it with the AX option. The AX configuration is certified to the 5 pound force requirement of 2010 ADA Chapters 404.2.7 and 30934, and AX is a selectable choice on the 9875F. The standard device is not AX unless you pick it, so specify it on the order if the opening is on an accessible route.
8) The 9875F will not fit my narrow stile aluminum storefront door - what mortise exit device should I use instead?
Use a narrow stile mortise device. The Adams Rite 8400 Series is a Grade 1 narrow stile mortise exit device for aluminum doors. The Sargent 8304 is a Grade 1 narrow stile mortise exit device in night latch function if the outside trim needs to retract the latch by key. The Von Duprin 9875F is a wide stile device with a center case measuring 8 inches by 2-3/4 inches by 2-3/8 inches and a 3-13/16 inch projection, which is the reason it needs the stile width of a wood or hollow metal door rather than a storefront rail. Note the Adams Rite 8400 Series lists its fire rating as No, so it is not a swap for the 9875F on a labeled opening.
9) What is the closest fire rated mortise exit device to the Von Duprin 9875F if I need a different manufacturer on the same wide stile opening?
The Adams Rite 3300 Series is the nearest match. Like the 9875F, it is a fire rated wide stile mortise exit device certified to Grade 1. The Von Duprin 9875F carries a Grade 1 rating with fire rating and a 3/4 inch latch throw on 1-3/4 inch doors, and the Adams Rite 3300 Series lists Grade 1 and a fire rating in the same wide stile format. The Corbin Russwin ED5600AL is a second option: it is a Grade 1 3 hour fire rated mortise exit device in wide stile for 1-3/4 inch doors, supplied exit only or for use with classroom or passage lever trim ordered separately, while the 9875F is ordered with its trim function selected up front across knob, lever, thumbpiece, night latch and dummy options.
10) My opening is not fire rated and I only need push to exit - is there a simpler mortise device than the 9875F?
Yes. The Falcon 25-M-EO is a Grade 1 wide stile mortise exit device built exit only for 1-3/4 inch doors in a 36 inch size, which strips out the trim selection entirely. The Adams Rite 8300 Series is another non fire rated Grade 1 wide stile mortise device. The 9875F is fire rated and is ordered with a trim function chosen from exit only through knob, lever, thumbpiece and night latch, so it covers openings that require a UL fire listing as well as ones that do not. If the door assembly carries a fire label, the exit only devices above are not substitutes, since the Falcon 25-M-EO and Adams Rite 8300 Series do not list a fire rating.
11) How much clearance do I need in the corridor for the 9875F push bar?
Allow 3-13/16 inches of projection from the door face for the device. That matters where the door swings into a stair landing or a tight corridor and the push pad has to clear a wall, a rail, or a door in the opposite leaf. The mechanism case itself measures 8 x 2-3/4 x 2-3/8 inches, and the device covers a 36 inch door.
12) What outside trim options come with the Von Duprin 9875F mortise exit device?
Eleven trim functions are offered: exit only (EO), night latch (NL), knob (K), knob with blank escutcheon (K-BE), knob night latch (K-NL), lever (L), lever with blank escutcheon (L-BE), lever night latch (L-NL), thumbpiece (TP), thumbpiece with blank escutcheon (TP-BE), and dummy trim (DT). Pick by how the door is used: EO where nobody comes in that way, NL or L-NL where staff key in and the lever is otherwise rigid, and a lever function where the door is used for entry. If you choose an L trim you also pick the lever design, from 06 (default), 01, 02, 03, 05, 07, 17, or 18.
13) Can I get a Von Duprin 9875F with request to exit or latch monitoring for my access control system?
Yes, and there are ten switch choices to specify. RX gives request to exit, LX monitors the latch bolt, LX-RX combines both, WP-RX is the waterproof RX for exterior openings, RX-LC is a low current RX for boards with tight current budgets, and RX-2 gives a double request to exit. SS is a signal switch. If you want local alarm on the door, ALK is the alarm exit kit less switch, with RX-ALK and LXRX-ALK adding the monitoring switches. Switch selection is optional, so it has to be called out on the order.
14) What do I need for delayed egress on a fire rated door?
The 9875F upgrades to the CX CHEXIT configuration, which meets NFPA and IBC delayed egress requirements. It holds the door secure for 15 seconds after a request to exit while a nuisance alarm sounds, then releases. That is the code-compliant way to slow an exit in a facility that needs controlled egress without giving up the fire rating on the opening.
15) Is there a quieter version of the Von Duprin 9875F for a hospital or a library?
Two options address noise. QM, quiet mechanical, is a yes/no selection on the device and reduces the mechanical noise of the latch cycle. If you are also powering the device, QEL quiet electric latch retraction runs the motor far quieter than standard EL. Both are worth specifying on patient floors, testing areas, and reading rooms where a slamming exit device carries down the corridor.
16) What is the wide stile mortise equivalent to the Von Duprin 9875F from another brand?
Two close cross-brand matches. The Corbin Russwin ED5600AL is a Grade 1, 3 hour fire rated wide stile mortise exit device for 1-3/4 inch doors, exit only or for use with classroom or passage lever trim (trim not included), which lines up with the 9875F on rating, stile, and door thickness. The Falcon 25-M-EO is a Grade 1 wide stile mortise device in the same 36 inch, 3 foot size for 1-3/4 inch doors, but it is exit only, so it is the choice when you need no outside trim at all. The Detex 30 Series Advantex is another Grade 1 wide stile exit-only mortise device, also not wood door compatible.
17) I only need a night latch function mortise exit device. What are my options besides the 9875F?
The 9875F itself can be ordered in NL, K-NL, or L-NL night latch trim functions, so it covers that need directly. If you are shopping across brands, the Sargent 8904 is a Grade 1 wide stile mortise exit device in night latch function with 24VAC/DC operation, and the Sargent 8304 is the narrow stile night latch mortise device for slimmer doors. Match the stile type to the door first, then the function.
18) I have a Von Duprin 98 Series device already installed. Can I add dogging indication or electric latch retraction later?
Yes, without replacing the device. The 98/99 Series has field-configurable retrofit kits, including CDSI and HDSI dogging indicators, QEL quiet electronic latch retraction, and RX and LX electronic switches. That matters when a facility adds access control or door status monitoring after the hardware is already on the doors, since the existing device and door prep stay in place.
19) Is a mortise exit device the right choice, or should I use a rim device?
A mortise device like the 9875F puts the lock body inside the door edge and latches into the frame, which gives a cleaner look and no surface strike on the frame, but it demands a mortise pocket in the door. A rim device mounts entirely on the door face into a surface strike and is the simpler retrofit when the door has no mortise prep. On a pair of doors, either one needs a mullion; go to a vertical rod or 3-point configuration if the opening has to stay clear. The 98/99 Series covers all of those, so the family stays the same across a building even when the device type changes opening to opening.
20) Which of these mortise exit devices look like a substitute for the Von Duprin 9875F but are not?
Two are commonly mistaken for it. The Sargent 1256NB-8710G is a fire rated exit device with electric latch retraction, but it is a surface mount vertical rod device in narrow stile at 84 inches, so it latches at the head and sill rather than into a mortise lock in the edge of the door. The Sargent 810 is exit device trim in dummy function, a pull only - it is not a device and does not latch. The Von Duprin 9875F is a wide stile mortise exit device with a 3/4 inch latch throw and a 36 inch product size, and its own dummy option is a trim function ordered on the device rather than a separate pull.
21) I need a night latch mortise exit device on a wide stile door - how does that compare to ordering the 9875F?
The Sargent 8904 is a Grade 1 wide stile mortise exit device supplied in night latch function with 24VAC/DC operation. On the Von Duprin 9875F, night latch is one of the trim functions selected when ordering - NL night latch, K-NL knob with night latch, and L-NL lever with night latch are all available, alongside exit only, knob, lever, thumbpiece and dummy trim. The 9875F is also fire rated and Grade 1 on 1-3/4 inch doors, and it takes electric options through its latch retraction and switch selections rather than arriving in a single fixed electrified build.
22) What finishes does the Von Duprin 9875F come in for matching the rest of my building?
Twelve finishes: 605 bright brass, 606 satin brass, 612 satin bronze, 613 oil rubbed bronze, 619 satin nickel, 625 bright chrome, 626 satin chrome, 628 aluminum, 630 satin stainless steel, 643E aged bronze, 710 dark bronze anodized, and 711 flat black. For institutional corridors 630 satin stainless and 626 satin chrome are the two that show wear least. If the rest of your openings are already specified by BHMA number, match the number rather than the finish name.
23) What push bar options are available on the 9875F for accessibility or low-light exits?
Five bar choices. Standard bar is the default. BR is a Braille push bar for accessible signage requirements, KN is a knurled bar (knurling is the tactile warning that a door leads to a hazardous area), SG is a safety glow push bar for exits that must be findable when the lights drop, and RSS is the emergency exit push bar. Bar option is a required selection on the order.
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Does the Von Duprin 9875EO-F 3 US26D come with a warranty?
Absolutely. The Von Duprin 9875EO-F 3 US26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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