Von Duprin 9875F-4FT Fire Rate...
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$3,740.60
Von Duprin 9875-F Series - Fire Rated 4 ft Smooth Case Wide Stile Mortise Exit Device, Less Dogging

Von Duprin 9875F-4FT Fire Rated 4 ft Wide Stile Mortise Exit Device, Less Dogging

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Model: 9875EO-F 4 US26D
$3,740.60
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Von Duprin 9875F-4FT Fire Rated 4 ft Wide Stile Mortise Exit Device, Less Dogging

Commercial-Grade Mortise Exit Device for Demanding Institutional Applications

The Von Duprin 9875F-4FT is a fire rated, 4 ft (48") 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 heavy-duty push pad design, this device is certified to ANSI/BHMA A156.3 2014 Grade 1 standards and carries ANSI/UL 10C fire-rated listing, as well as CAN/ULC-S104 fire-rated certification. Designed for single and double doors with mullion, the 9875F-4FT 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".

Professional Features & Benefits

  • Fire-Rated Construction: Certified to ANSI/UL 10C and CAN/ULC-S104 fire-rated standards, ensuring compliance in fire-rated door assemblies where life safety is paramount.
  • ANSI/BHMA Grade 1 Certified: Meets ANSI/BHMA A156.3 2014 Grade 1 certification, the highest industry standard for commercial exit devices, along with ANSI/UL 305 and CAN/ULC-S132 listings.
  • Wide Stile, 4 ft (48") Push Pad: Heavy-duty wide stile push pad spanning 48" provides reliable, full-width actuation for high-traffic commercial and institutional applications.
  • Precise Dimensional Specifications: Features a 3/4" latch throw, 8" x 2-3/4" x 2-3/8" center case dimensions, 3-13/16" product projection, and accommodates 1-3/4" door thickness for accurate installation planning.
  • Smooth Mechanism Case (98 Series): The 98 Series smooth mechanism case offers a refined architectural aesthetic while delivering the same heavy-duty performance as the grooved 99 Series case.
  • Non-Handed Design: Non-handed configuration simplifies specification and installation, reducing inventory requirements and installation complexity across multi-door projects.
  • Fasteners Included: Ships with fasteners for wood or metal doors 1-3/4" and 2-1/4" thick, streamlining installation without the need for additional hardware procurement.
  • Field-Configurable & Retrofit-Ready: A variety of field-configurable options are available, including CDSI/HDSI security dogging indicators, QEL electronic latch retraction, and electronic switches (Request to Exit and Latchbolt Monitoring) for access control integration.
  • Upgrade Options Available: Compatible with AX (ADA-compliant, certified to 5 lb. force requirements per 2010 ADA Chapters 404.2.7 and 30934 and 2013 California Building Code Chapter 11B-309.4), CX (CHEXIT delayed egress meeting NFPA and IBC requirements with 15-second delay), and XP (patented 2-piece latchbolt design) upgrade configurations.

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: 9875-4ft
  • Door Hand Direction: Non-Handed
  • Door Thickness Range: 1-3/4"
  • Product Size: 48"
  • 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

  • Public and Private Educational Facilities (Schools and Universities)
  • Healthcare Institutions and Hospitals
  • Government and Municipal Buildings
  • Commercial Office Buildings
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties Requiring Fire-Rated Egress
  • Retail Establishments with High-Traffic Exit Requirements

Delayed Egress Compliance

The Von Duprin 9875F-4FT is compatible with the CX (CHEXIT) delayed egress upgrade, which meets NFPA and IBC requirements for delayed egress applications. This configuration 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 98/99 Series mortise exit devices are certified to ANSI/BHMA A156.3 2014 Grade 1 standards and carry ANSI/UL 10C, ANSI/UL 305, CAN/ULC-S104, and CAN/ULC-S132 listings, reflecting a commitment to the highest levels of safety and performance. The 9875F-4FT is purpose-built for demanding institutional environments—schools, hospitals, and government facilities—where dependable, fire-rated egress hardware is non-negotiable. With field-configurable options, retrofit kit compatibility, and a broad range of trim and function choices, Von Duprin delivers the flexibility and reliability that commercial door hardware professionals 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:
9875-4ft
Door Hand Direction:
Non-Handed
Door Thickness Range:
1-3/4"
Product Size:
48"
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 4 US26D – Frequently Asked Questions

1) Can I use the 9875F on a 36 inch door, or do I need the 3 ft version?
The 9875F-4FT is the 48 inch device, sized for door leaves in the 4 ft range. Von Duprin exit devices are sized to the door leaf, so a 36 inch opening takes the 3 ft version of the same 98/99 Series device rather than this one. If you are short on the 4 ft device for a 3 ft opening, the Falcon 25-M-EO at 36 inches is a Grade 1 wide stile mortise exit-only alternative in that width.
2) Is the 9875F approved for a fire rated door assembly?
It is. The 9875F is fire rated and carries ANSI/UL 10C and CAN/ULC-S104 listings, plus ANSI/UL 305 and CAN/ULC-S132 panic listings, and it is certified to ANSI/BHMA A156.3 2014 Grade 1. That is why it ships less dogging: mechanical dogging is not permitted on a fire door, so the latch stays projected at all times.
3) Why is there no dogging on this Von Duprin device, and how do I hold the door unlatched during business hours?
Being a fire rated device, the 9875F is supplied less dogging. To get hands-free or scheduled operation you go electric instead: order it with EL electric latch retraction, QEL quiet electric latch retraction, or PN pneumatic latch retraction, which pull the latch back on command and release on alarm. Von Duprin also offers CDSI/HDSI security dogging indicators on the platform for facilities that track device status.
4) Do I need to specify handing on a Von Duprin 9875F mortise exit device?
Yes. Although the push pad chassis is described as non-handed, the mortise lock case has to match the swing, so the order requires either RHR (right hand reverse) or LHR (left hand reverse). Stand outside the door: exit devices are always on the egress side, which is what puts both options in the reverse bevel family.
5) Will this exit device latch into my existing mortise strike?
The 9875F throws its mortise latch 3/4 inch. A standard commercial mortise strike with an ANSI 4-7/8 inch face prepped for a 3/4 inch throw will take it, but because this is a mortise device the door edge and frame must already carry a mortise lock pocket and matching strike prep. If the opening currently has a rim device with a surface strike, that is a different prep and the door will need to be re-prepped.
6) Can the 9875F be tied into our access control system?
Yes. Switch options include RX (request to exit), LX (latch bolt monitor), LX-RX combined, WP-RX waterproof, RX-LC low current, RX-2 double request to exit, SS signal switch, and alarm kit versions ALK, RX-ALK and LXRX-ALK. For remote unlocking, add EL or QEL electric latch retraction. CX (CHEXIT) delayed egress is also available, holding the door for 15 seconds after a request to exit with a nuisance alarm, to NFPA and IBC delayed egress requirements.
7) Does this Von Duprin device meet the ADA 5 lb operating force requirement?
Only if you order it as an AX accessible device. The AX configuration is certified to the 5 lb force requirements of 2010 ADA Chapters 404.2.7 and 30934 and 2013 California Building Code Chapter 11B-309.4. Standard configuration does not carry that certification, so specify AX on openings that have to meet it.
8) What is the closest fire rated alternative to the Von Duprin 9875F mortise exit device?
The Von Duprin 9875F is a Grade 1, wide stile mortise exit device with a fire rating. The closest fire rated mortise peers are the Adams Rite 3300 Series, a Grade 1 fire-rated wide stile mortise exit device for wood and hollow metal doors, and the Corbin Russwin ED5600AL, a Grade 1 three hour fire rated wide stile mortise device for 1-3/4 inch doors that is exit only or accepts passage or classroom lever trim. The Von Duprin is non-handed and covers a 48 inch push pad, while the Corbin Russwin requires separate lever trim.
9) Should I use a mortise exit device or a rim device on my opening?
A mortise device like the 9875F puts the latch inside a pocket in the door edge and latches into a frame strike, which gives a cleaner look and better resistance at the edge, but it requires a mortise prep in the door. A rim device surface-mounts and is far easier to retrofit onto a door that is not already mortised. For a pair of doors, the 9875F works on single doors and on pairs when a removable mullion is used; without a mullion you would go to a vertical rod device instead, such as the Sargent 1256NB-8710G surface vertical rod.
10) What trim functions can I order with the 9875F, and what does NL mean?
Trim choices run from exit only (EO, no outside trim at all) through knob (K), lever (L), thumbpiece (TP), night latch versions of knob and lever (K-NL, L-NL, NL), blank escutcheon versions (K-BE, L-BE, TP-BE), and dummy trim (DT). Night latch means the outside is key retracting only: the cylinder pulls the latch to let you in, with no free handle. If you pick an L trim, you also choose the lever style, 01, 02, 03, 05, 06, 07, 17 or 18, with 06 as the default.
11) Are mounting fasteners included with the 9875F, or do I need to order them?
Fasteners ship with the device, covering doors 1-3/4 and 2-1/4 inches thick. What is not included is the outside trim and cylinder: trim function is a separate selection, and any keyed function (NL, K-NL, L-NL, or a keyed trim) needs a mortise cylinder to suit your keyway, ordered separately.
12) Is the 9875F suitable for a high traffic school or hospital corridor?
That is the application it is built for. It is a commercial Grade 1 device to ANSI/BHMA A156.3 2014, with a full 48 inch push pad so the door releases wherever someone hits it, and a fire rated listing for rated corridor and stair openings. For quieter operation in patient care or testing areas, specify the QM quiet mechanical option or QEL quiet electric latch retraction.
13) What should I use on a non-fire-rated opening instead of the 9875F?
The 9875F carries a fire rating, which is required only on fire-rated door assemblies. For a non-rated opening, the Adams Rite 8300 Series is a Grade 1 wide stile mortise exit device for wood and hollow metal doors listed as not fire rated, and the Adams Rite 8400 Series is the narrow stile equivalent for aluminum doors.
14) I only need exit only with no outside trim - is there a simpler mortise device than the 9875F?
Yes. The 9875F is offered across a range of trim functions from exit only through knob, lever, thumbpiece and night latch. If you only need exit only, the Falcon 25-M-EO is a Grade 1 wide stile mortise exit device in exit only function for 1-3/4 inch doors in a 36 inch size, the BEST Precision 2301 is an exit only mortise device with heavy wrought construction, and the Detex 30 Series Advantex is a Grade 1 wide stile device only, exit only.
15) Is the Sargent 8904 a direct substitute for the Von Duprin 9875F?
Only for a night latch opening. The Sargent 8904 is a Grade 1 wide stile mortise exit device in night latch function with 24VAC/DC operation. The 9875F covers night latch as one of several trim functions alongside exit only, knob, lever and thumbpiece, and is non-handed with a 3/4 inch latch throw. If the opening needs a lever or knob trim function, the 8904 will not cover it.
16) What is the difference between the Von Duprin 98 and 99 Series cases?
Mechanically they are the same heavy-duty device. The 98 case, which is what the 9875F uses, is smooth; the 99 case is grooved. Pick based on the look you want to match across the building, not on performance. If you already have 99 Series devices on adjacent openings and want a consistent appearance, order the grooved version of the same device.
17) What finishes does the Von Duprin 9875F come in for matching existing hardware?
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, 626 and 630 are the usual matches to existing Grade 1 hardware.
18) Are there push bar options for visually impaired users or low-light egress?
Yes. Beyond the standard bar you can specify BR braille push bar, KN knurled bar (the tactile warning texture used on doors leading to hazardous areas), RSS emergency exit push bar, or SG safety glow push bar for visibility when the lights are out. All are ordered on the same 48 inch device.
19) What is the XP option on Von Duprin 98/99 mortise devices?
XP is a patented two-piece latchbolt design offered as an upgrade on the 9875F. It is specified where a door is likely to see attack or heavy abuse at the latch. Other upgrade paths on the same device are AX for ADA 5 lb operating force and CX for CHEXIT delayed egress.
How fast can I get the Von Duprin 9875EO-F 4 US26D delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Von Duprin 9875EO-F 4 US26D come with a warranty?
Absolutely. The Von Duprin 9875EO-F 4 US26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Von Duprin 9875EO-F 4 US26D?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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