Von Duprin 9975F-3FT Fire Rate...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,251.00
$2,075.04
Von Duprin 9975-F Series - Fire Rated 3 ft Grooved Case Wide Stile Mortise Exit Device, Less Dogging

Von Duprin 9975F-3FT Fire Rated Mortise Exit Device, 36" Wide Stile, Less Dogging, Grade 1

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Model: 9975EO-F 3 US26D
$3,251.00
$2,075.04
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Von Duprin 9975F-3FT Fire Rated Mortise Exit Device, 36" Wide Stile, Less Dogging, Grade 1

Heavy-Duty Fire Rated Mortise Exit Device for Institutional and Commercial Applications

The Von Duprin 9975F-3FT is a fire rated, wide stile mortise exit device from the renowned 98/99 Series, engineered for demanding institutional environments including schools, hospitals, and government buildings. Designed for 36" doors with a wide stile configuration, this device features a grooved mechanism case and a 3/4" latch throw, accommodating door thicknesses of 1-3/4". The center case measures 8" x 2-3/4" x 2-3/8" with a product projection of 3-13/16", and the unit ships with fasteners included for wood or metal doors 1-3/4" and 2-1/4" thick. Certified to ANSI/BHMA A156.3 2014 Grade 1 and listed to ANSI/UL 10C for fire-rated applications, this non-handed device delivers code-compliant panic exit hardware performance for single and double door installations with mullion.

Professional Features & Benefits

  • Fire Rated Certification: Listed to ANSI/UL 10C and CAN/ULC-S104 for fire-rated applications, ensuring full compliance in fire-rated door assemblies.
  • ANSI/BHMA Grade 1 Certified: Certified to ANSI/BHMA A156.3 2014 Grade 1, the highest industry standard, for reliable performance in high-traffic commercial and institutional settings.
  • Wide Stile, 36" Door Compatibility: Designed specifically for 36" wide stile doors, with a grooved 99 Series mechanism case and center case dimensions of 8" x 2-3/4" x 2-3/8" for precise fit.
  • Mortise Lock Device Configuration: Classified as a mortise exit device (75 series type), providing robust latching with a 3/4" latch throw and a product projection of 3-13/16" for dependable door security.
  • Door Thickness Compatibility: Accommodates door thicknesses of 1-3/4"; fasteners included for wood or metal doors 1-3/4" and 2-1/4" thick for versatile installation.
  • Non-Handed Design: Non-handed configuration simplifies specification and installation, except when select device options such as SD, -2 (Double Cylinder), or SS (signal switch) are applied.
  • Less Dogging Configuration: Supplied without dogging hardware, suitable for fire-rated door applications where dogging is not permitted per code requirements.
  • Field-Configurable & Retrofit Ready: A variety of field-configurable options and retrofit kits are available, including CDSI/HDSI security dogging indicators, QEL electronic latch retraction, and electronic switches (RX request to exit, LX latchbolt monitoring) for integration with access control systems.
  • Upgrade Options Available: Compatible with AX (ADA-certified, 5 lb. force compliant per 2010 ADA Chapters 404.2.7 and 30934 and 2013 California Building Code Chapter 11B-309.4), CX (CHEXIT delayed egress, 15-second delay per NFPA and IBC), 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: 9975F-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

  • 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 Fire-Rated Door Assemblies

Delayed Egress Compliance

The 9975F-3FT is compatible with the CX (CHEXIT) upgrade option, which meets NFPA and IBC requirements for delayed egress. When configured with CHEXIT, 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 applicable facilities.

Why Choose Von Duprin Quality?

Von Duprin 98/99 Series mortise exit devices are certified to ANSI/BHMA A156.3 2014 Grade 1 and listed to ANSI/UL 10C and CAN/ULC-S104 for fire-rated applications, representing the highest standards in commercial panic exit hardware. The 9975F-3FT features a heavy-duty wide stile push pad design with a grooved mechanism case, engineered for high-use and high-abuse institutional environments such as schools, hospitals, and government facilities. With a broad range of field-configurable options, retrofit kits, and upgrade paths, Von Duprin delivers the flexibility and dependability that demanding commercial applications require.

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:
9975F-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 9975EO-F 3 US26D – Frequently Asked Questions

1) Will the Von Duprin 9975F fit my 36 inch door, and what door thickness does it need?
The 9975F-3FT is sized for a 36 inch door and is built for 1-3/4 inch thick doors. It is a wide stile device, so the door needs enough stile face to carry the 8 x 2-3/4 x 2-3/8 inch center case. Projection off the door face is 3-13/16 inches, which matters if the door swings near a wall or a second leaf. Fasteners ship in the box for wood or metal doors at 1-3/4 inch and 2-1/4 inch thickness.
2) Is the 9975F fire rated, and can it be dogged down for daytime free access?
Fire rated, yes, and that is exactly why it ships less dogging. Mechanical dogging is not permitted on a fire door assembly, so the 9975F has no hex dogging to hold the latch retracted. If you need the door to stay push-pull during business hours on a fire rated opening, spec electric latch retraction (EL or QEL) instead, which releases the latch on signal and drops back to latched on power loss or alarm.
3) Which standards does the Von Duprin 9975F meet for a school or hospital egress door?
The 9975F is certified to ANSI/BHMA A156.3 2014 Grade 1 and listed to ANSI/UL 10C and CAN/ULC-S104 for fire rated door assemblies. If you also need ADA compliant operating force, the AX option is certified to the 5 lb. force requirement under 2010 ADA Chapters 404.2.7 and 30934 and 2013 California Building Code Chapter 11B-309.4.
4) Do I have to specify handing on the Von Duprin 9975F mortise exit device?
The device itself is non-handed, but a mortise exit device latches into the jamb, so handing is selected on the order: RHR (right hand reverse) or LHR (left hand reverse). Handing also becomes fixed when certain options are applied, including SD, -2 double cylinder, or SS signal switch.
5) What are the comparable wide stile mortise exit devices if I cannot get the Von Duprin 9975F?
Closest equivalents we carry in Grade 1 wide stile mortise: the Corbin Russwin ED5600AL, a 3 hour fire rated device for 1-3/4 inch doors that takes passage or classroom lever trim (trim sold separately), the Falcon 25-M-EO for a 36 inch wide stile door in exit only, the Detex 30 Series Advantex, and the Sargent 8904 in night latch function. The Adams Rite 3300 Series is the one to use if the opening is a wood door. Note the Adams Rite 8300 and 8400 are life safety devices, not fire rated, so they do not substitute on a fire rated assembly.
6) What is the closest fire rated mortise exit device to the Von Duprin 9975F if I need another brand for the same opening?
The Von Duprin 9975F-3FT is a Grade 1, fire rated, wide stile mortise exit device for 36 inch doors with a 1-3/4 inch door thickness. The closest cross-brand match is the Corbin Russwin ED5600AL, a Grade 1 3 hour fire rated wide stile mortise exit device also listed for 1-3/4 inch doors, which is supplied exit only or for use with classroom or passage lever trim. The Adams Rite 3300 Series is another fire rated Grade 1 wide stile mortise device, and it is listed for wood and hollow metal doors, whereas the 9975F-3FT is not wood door compatible.
7) My pair of doors has no mullion - can I swap in the 9975F?
The 9975F-3FT is a mortise device, which latches into the frame and so needs a single door or a pair with a mullion. On a pair without a mullion you need a vertical rod device instead, such as the Sargent 1256NB-8710G, an 84 inch fire rated surface mount vertical rod exit device with electric latch retraction. If you want latch retraction on the mortise device itself, the 9975F is offered with EL, QEL or PN latch retraction.
8) Should I use a mortise exit device like the 9975F or a rim device on my opening?
A mortise device like the 9975F puts the lock body inside the door edge and throws a 3/4 inch latch into the frame, so the door has to be prepped for a mortise lock case. It works on a single door and on a pair when a removable mullion is used. A rim device surface mounts and needs only a rim strike, which is simpler on an existing door with no mortise pocket. If the pair has no mullion and you cannot add one, neither a mortise nor a rim device will work, and you need a vertical rod device that latches at the head and sill.
9) What trim can I order with the Von Duprin 9975F, and what do I pick for a night latch opening?
Trim functions run from exit only (EO) and dummy trim (DT) through knob, lever, and thumbpiece sets, including blank escutcheon and night latch versions: K, K-BE, K-NL, L, L-BE, L-NL, NL, TP and TP-BE. For key retracts latch from outside and no free entry, choose NL, K-NL or L-NL. On any L option you also pick the lever design, 01, 02, 03, 05, 06, 07, 17 or 18.
10) Can the Von Duprin 9975F be tied into an access control or alarm system?
Yes, through switch and retraction options ordered with the device. Switches include RX request to exit, LX latchbolt monitor, LX-RX combination, WP-RX waterproof, RX-LC low current, RX-2 double RX, SS signal switch, and alarm kits ALK, RX-ALK and LXRX-ALK. Latch retraction comes as EL, QEL or PN pneumatic. For a delayed egress opening, the CX CHEXIT upgrade holds the door 15 seconds after a request to exit with a nuisance alarm, per NFPA and IBC.
11) My opening is not fire rated and I only need exit only - is there a simpler mortise device than the 9975F?
Yes. The 9975F-3FT is a fire rated device that carries a full range of trim functions including lever, knob, thumbpiece, night latch and dummy trim. If the opening is not fire rated and you only need push-to-exit, the Falcon 25-M-EO-3FT is a Grade 1 exit only wide stile mortise device for 36 inch doors at 1-3/4 inch thickness, and the BEST Precision 2301 is an exit only mortise device with heavy wrought construction. The Adams Rite 8300 Series is a Grade 1 wide stile mortise life-safety device that is not fire rated.
12) I need a night latch mortise exit device - is the 9975F the right one or should I look at Sargent?
The 9975F-3FT is available in NL night latch trim as well as K-NL and L-NL, on a Grade 1 fire rated wide stile mortise chassis. If you are matching Sargent hardware already on the building, the 8904 is a Grade 1 wide stile mortise exit device in night latch function with 24VAC/DC operation, and the 8304 is the narrow stile night latch equivalent. Choose by stile width and whether the opening is fire rated.
13) Is the Sargent 810 a substitute for the Von Duprin 9975F?
No. The Sargent 810 is dummy pull exit device trim, not a latching device. The 9975F-3FT is a complete Grade 1 mortise exit device with a 3/4 inch latch throw and a push pad. The 9975F does offer a DT dummy trim function if a matching inactive leaf is what you are after, but the 810 on its own will not latch or provide panic egress.
14) What about a mortise exit device for a heavy abuse exterior opening instead of the 9975F?
The 9975F-3FT is a Grade 1 wide stile mortise device built for high-use institutional openings and is not wood door compatible. A comparable alternative is the Detex 30 Series Advantex, a Grade 1 wide stile mortise exit device supplied device only in exit only function and likewise not wood door compatible. The difference that usually decides it is trim: the 9975F carries lever, knob, thumbpiece and night latch trim options, while the Detex 30 is offered exit only.
15) What finishes does the Von Duprin 9975F come in for matching existing hardware in a building?
Twelve finishes, so matching an existing standard 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. For institutional corridors, 626 and 630 are the usual standardization choices.
16) What push bar options are available on the 9975F for accessibility or low light egress?
Besides the standard push pad, you can order BR braille pushbar, KN knurled bar (the tactile warning surface used on doors leading to hazardous areas), RSS emergency exit push bar, or SG safety glow pushbar for low light egress paths. QM quiet mechanical is also selectable if pad noise is an issue in a hospital or exam corridor.
How fast can I get the Von Duprin 9975EO-F 3 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 9975EO-F 3 US26D come with a warranty?
Absolutely. The Von Duprin 9975EO-F 3 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 9975EO-F 3 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
Why buy the Von Duprin 9975EO-F 3 US26D from ZenSupply?
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