Von Duprin 9875-4FT 4 ft Smoot...
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$3,518.00
Von Duprin 9875 4 ft Smooth Case Wide Stile Mortise Exit Device with Hex Key Dogging, Satin Stainless Steel finish, push-bar side view

Von Duprin 9875-4FT 4 ft Smooth Case Wide Stile Mortise Exit Device with Hex Key Dogging

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Model: 9875EO 4 US26D
$3,518.00
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Von Duprin 9875-4FT 4 ft Smooth Case Wide Stile Mortise Exit Device with Hex Key Dogging

Heavy-Duty Commercial Mortise Exit Device for Institutional and High-Traffic Applications

The Von Duprin 9875-4FT is a 4-foot (48") smooth case, wide stile mortise exit device engineered for demanding institutional environments including schools, hospitals, and government buildings. Part of the renowned 98/99 Series, this device features a smooth mechanism case and wide stile heavy-duty push pad design, certified to ANSI/BHMA A156.3 2014 Grade 1 standards. Designed for single and double doors with mullion, the 9875-4FT accommodates 1-3/4" door thickness and delivers a 3/4" latch throw, making it a reliable solution for high-use commercial applications. The device is non-handed, offering flexible installation across a wide range of door configurations.

Professional Features & Benefits

  • Wide Stile Heavy-Duty Push Pad: Smooth mechanism case design with wide stile construction provides a robust, architectural-grade push pad solution suited for institutional and commercial applications.
  • 48" Product Size: The 4-foot (48") case length accommodates wide door openings, ensuring full-width coverage for compliant egress on large commercial doors.
  • Door Thickness Compatibility: Designed for 1-3/4" door thickness with fasteners included for wood or metal doors 1-3/4" and 2-1/4" thick, providing versatile installation options.
  • 3/4" Latch Throw: Delivers a positive 3/4" latch throw for secure latching performance in mortise exit device applications.
  • Center Case Dimensions: Compact center case measuring 8" x 2-3/4" x 2-3/8" with a product projection of 3-13/16" for a clean, professional installation profile.
  • Hex Key Dogging: Hex key dogging configuration allows the latchbolt to be held in the retracted position for high-traffic periods, improving convenience without compromising security.
  • Non-Handed Design: The device is non-handed (except when specific options such as SD, -2, or SS are applied), simplifying specification and reducing inventory requirements.
  • ANSI/BHMA Grade 1 Certified: Certified to ANSI/BHMA A156.3 2014 Grade 1, ANSI/UL 305, and CAN/ULC-S132, with fire-rated configurations also meeting ANSI/UL 10C and CAN/ULC-S104 standards.
  • Field-Configurable Options: A broad range of field-configurable options and retrofit kits — including QEL electronic latch retraction, CDSI/HDSI security dogging indicators, and electronic switches (RX, LX) — allow the device to adapt to evolving facility needs.
  • ADA and Delayed Egress Upgrade Paths: Upgradeable with AX option (certified to 5 lb. force ADA requirements per 2010 ADA Chapters 404.2.7 and 30934) or CX/CHEXIT for NFPA and IBC delayed egress compliance with 15-second hold and 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: 9975-4ft
  • Door Hand Direction: Non-Handed
  • Door Thickness Range: 1-3/4"
  • Product Size: 48"
  • Dogging Configuration: Hex Key Dogging
  • Fire Rating: No
  • 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
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential and Mixed-Use Properties

Delayed Egress Compliance

The Von Duprin 9875-4FT is upgradeable with the CX/CHEXIT option, which meets NFPA and IBC requirements for delayed egress. This configuration keeps doors secure for 15 seconds after a request to exit while a nuisance alarm sounds, providing code-compliant delayed egress for facilities requiring controlled exit management.

Why Choose Von Duprin Quality?

Von Duprin mortise exit devices are engineered to the highest industry standards, with the 98/99 Series certified to ANSI/BHMA A156.3 2014 Grade 1, ANSI/UL 305, and CAN/ULC-S132 — and to ANSI/UL 10C and CAN/ULC-S104 in fire-rated configurations. The 9875-4FT smooth case design and wide stile heavy-duty push pad construction are purpose-built for institutional environments where reliability under high use and abuse is essential. With a broad ecosystem of field-configurable options, retrofit kits, and upgrade paths, Von Duprin delivers a future-ready exit device solution for demanding commercial applications.

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:
9975-4ft
Door Hand Direction:
Non-Handed
Door Thickness Range:
1-3/4"
Product Size:
48"
Dogging Configuration:
Hex Key Dogging
Fire Rating:
No
Product Projection:
3-13/16"
Product Style:
Push Pads
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Von Duprin 9875EO 4 US26D – Frequently Asked Questions

1) Will the Von Duprin 9875 mortise exit device work on a wood door?
No. The 9875 is not wood door compatible, so on a wood opening you need a different device. The Adams Rite 3300 Series and 8300 Series mortise exit devices are both listed for wood and hollow metal doors, and both are Grade 1 wide stile like the 9875. Confusingly, the fastener pack shipped with the 9875 covers wood or metal doors 1-3/4 and 2-1/4 inches thick, but the device itself is specified for metal doors only.
2) What door thickness does the Von Duprin 9875-4FT fit?
1-3/4 inches, which is the standard commercial door thickness. That is the single thickness the 9875 is specified for, so if you are working on a 1-3/8 inch older interior door or a thicker custom leaf, this is not the device. The mounting fastener pack covers 1-3/4 and 2-1/4 inch doors.
3) Do I have to specify a hand when ordering a 9875 exit device?
The device itself is non-handed, but the order still asks for RHR (right hand reverse) or LHR (left hand reverse), because trim and certain options are handed. A few options do hand the device: SD special center case dogging, the -2 option, and the SS signal switch. Everything else installs either way, which is why facilities standardizing on the 98/99 Series can stock one device across mixed openings.
4) Should I use a mortise exit device or a rim or vertical rod device on a pair of doors?
A mortise exit device like the 9875 latches into the frame through a mortise lock body in the door edge, so it works on single doors and on pairs only where there is a mullion between the leaves. If you have a pair with no mullion and need both leaves to swing free, a mortise device is the wrong choice; a surface vertical rod device latches at the head and the threshold instead, such as the Sargent 1256NB-8710G, an 84 inch surface mount vertical rod device with electric latch retraction.
5) Will the 9875 latch reliably into my existing mortise strike?
The device throws its latchbolt 3/4 of an inch, which is the throw you compare against the strike pocket depth on the frame you already have. Because it is a mortise device, the door edge needs a mortise lock prep rather than a rim strike on the frame stop, so a door previously fitted with a rim device is not a straight swap.
6) Does the Von Duprin 9875 meet ADA push force requirements?
Only with the AX option. Ordered AX, the device is certified to the 5 lb. force ADA requirement per 2010 ADA Chapters 404.2.7 and 30934. Standard, without AX, do not assume the 5 lb. figure. AX is a required yes or no choice on the order.
7) What trim do I order with a 9875 mortise exit device, and can I get outside key access?
Trim function is chosen on the order. Exit only (EO) gives no outside operation at all. For outside entry choose a lever (L), knob (K), or thumbpiece (TP), and for key-only outside access take a night latch function, NL, L-NL, or K-NL, which is the usual pick on a back door or service entrance. Blank escutcheon versions (L-BE, K-BE, TP-BE) and dummy trim (DT, L-DT, K-DT) cover pull-only openings. If you take an L trim, you also pick the lever design: 01, 02, 03, 05, 06 (default), 07, 17, or 18.
8) Will a wide stile mortise exit device fit an aluminum storefront door?
Usually not. The 9875 is a wide stile device, and wide stile hardware needs more door edge and face than a typical narrow stile aluminum storefront rail gives you. For aluminum storefront, the Adams Rite 8400 Series is a Grade 1 narrow stile mortise exit device made for aluminum doors, and the Sargent 8304 is a narrow stile mortise device in night latch function.
9) I need a 36 inch mortise exit device, not a 48 inch - what are my options?
The Von Duprin 9875-4FT covers a 48 inch opening. For a 36 inch door, the Falcon 25-M-EO is a Grade 1 wide stile mortise exit device in a 36 inch, 3 foot length for 1-3/4 inch doors, matching the door thickness the 9875-4FT is built for. It is supplied exit only, so plan trim accordingly.
10) How much does the 9875 exit device stick out from the door face?
Projection is 3-13/16 inches, and the center case measures 8 x 2-3/4 x 2-3/8 inches. That projection is what you check against a wall return, an adjacent door swing, or a corridor clear width before you commit, particularly in a school or hospital corridor where egress width is measured.
11) What dogging options can I get on the Von Duprin 98/99 mortise device?
Hex key dogging is standard, which holds the latch retracted during business hours. You can order it instead with CD cylinder dogging, CDSI cylinder dogging with security indicator, HDSI hex dogging with security indicator, SD special center case dogging, DI dogging indicator, CI cylinder dogging indicator, or LD less dogging. Schools and hospitals that want staff to see at a glance whether a door is secured usually take CDSI or HDSI; LD is what you order when policy forbids dogging entirely.
12) Can the 9875 be tied into an access control system?
Yes, several ways. Latch retraction is available as EL electric latch retraction, QEL quiet electric latch retraction, or PN pneumatic, which lets the door be released remotely and left in a push-pull state on a schedule. For monitoring only, order RX request to exit, LX latch bolt monitor, or the LX-RX combination, with variants including WP-RX waterproof, RX-LC low current, RX-2 double request to exit, and SS signal switch. Alarm kits are ALK, RX-ALK, and LXRX-ALK.
13) Can I get a delayed egress exit device for a hospital or memory care unit?
The 9875 is upgradeable with the CX/CHEXIT option, which holds the door for 15 seconds after a request to exit while a nuisance alarm sounds, meeting NFPA and IBC delayed egress requirements. That is the configuration used on controlled units where staff need a window to respond before the door releases.
14) Is there a quieter version of the Von Duprin 98 Series exit device for a hospital corridor?
Two paths. QM quiet mechanical is a yes/no choice on the order and quiets the device itself. If you are also doing electric latch retraction, take QEL quiet electric latch retraction rather than standard EL. Both matter on patient floors and near classrooms where the crash of a standard device is the complaint that comes back.
15) What is the difference between the Von Duprin 98 and 99 Series exit devices?
The case. The 98 Series uses a smooth mechanism case and the 99 Series a grooved one; the 9875 is the smooth case device. Mechanically they are the same 98/99 Series platform certified to ANSI/BHMA A156.3 2014 Grade 1, so the choice is architectural appearance and matching what is already on the adjacent openings.
16) What are the alternatives to a Von Duprin 9875 mortise exit device from other brands?
Staying wide stile and Grade 1: the Corbin Russwin ED5600AL takes passage or classroom lever trim (trim sold separately) and is fire rated; the Detex 30 Series Advantex is exit only and, like the Von Duprin, is not for wood doors; BEST Precision 2301 is an exit only heavy wrought mortise device. If the opening needs night latch with 24VAC/DC operation, the Sargent 8904 is the wide stile mortise device in that function. The main practical split is that the 9875 offers a full trim range including levers, knobs, thumbpiece, and night latch on one platform, where several of these peers are exit only.
17) Can I add electric latch retraction or a security indicator to a Von Duprin 98 Series device already installed?
Yes. The 98/99 Series takes field-configurable options and retrofit kits, including QEL electronic latch retraction, CDSI and HDSI security dogging indicators, and RX and LX electronic switches, so a mechanical device installed today can be brought onto an access control system later without replacing the whole device.
18) Which mortise exit devices besides Von Duprin are Grade 1 for a school or hospital corridor?
The 9875-4FT is Grade 1 with hex key dogging standard. Among comparable wide stile Grade 1 mortise devices, the Detex 30 Series Advantex is Grade 1 wide stile and supplied device only, exit only, and is not wood door compatible, the same as the 9875-4FT. The Corbin Russwin ED5600AL is Grade 1 wide stile for 1-3/4 inch doors and accepts passage or classroom lever trim, which is the usual ask on a classroom door.
19) Is there a simpler exit only mortise device if I do not need outside trim?
The 9875-4FT is ordered with a trim function that includes exit only as one choice, alongside knob, lever, thumbpiece and night latch options. If the whole order is exit only, the Falcon 25-M-EO is a Grade 1 wide stile mortise exit device supplied exit only for 1-3/4 inch doors in a 36 inch length, the BEST Precision 2301 is an exit only mortise device of heavy wrought construction, and the Detex 30 Series Advantex is a Grade 1 wide stile mortise device supplied device only, exit only, and is not wood door compatible.
20) What is the difference between the Von Duprin 9875 and a Sargent 8904 for a night latch opening?
Both are wide stile Grade 1 mortise exit devices. The Sargent 8904 is a night latch function device with 24VAC/DC operation, so the function and the electrical operation come fixed in the model. On the Von Duprin 9875-4FT, night latch is one of the trim functions selected at order, in NL, K-NL and L-NL forms, and the electrical behavior is chosen separately through options such as EL and QEL electric latch retraction.
21) What finishes does the Von Duprin 9875 mortise exit device come in?
Twelve, so matching existing openings across a building is usually possible: 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. 630 satin stainless is the common institutional standard and 628 aluminum the usual match for storefront and aluminum frames.
22) What push bar options are available on the Von Duprin 98/99 exit device?
Beyond the standard bar you can order BR braille push bar, KN knurled bar, RSS emergency exit push bar, or SG safety glow. Knurled bar is the tactile warning finish some codes call for on doors to hazardous areas, and safety glow is what gets specified where the egress path has to be findable in a power failure.
How fast can I get the Von Duprin 9875EO 4 US26D delivered?
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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 4 US26D come with a warranty?
Absolutely. The Von Duprin 9875EO 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 4 US26D?
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