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

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.