Von Duprin 9975F-4FT Fire Rated 48" Wide Stile Mortise Exit Device, Less Dogging

Von Duprin 9975F-4FT Fire Rated 48" Wide Stile Mortise Exit Device, Less Dogging

Heavy-Duty Commercial Mortise Exit Device with Fire Rating for Institutional Applications

The Von Duprin 9975F-4FT 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. Featuring a grooved mechanism case and a 48" product size, this device is certified to ANSI/BHMA A156.3 2014 Grade 1 standards and listed to ANSI/UL 10C for fire-rated applications. Designed for single and double doors with mullion, the 9975F-4FT accommodates door thicknesses of 1-3/4" and includes fasteners for both wood and metal doors of 1-3/4" and 2-1/4" thickness. The device is non-handed and configured Less Dogging, with a 3/4" latch throw and a center case measuring 8" x 2-3/4" x 2-3/8", making it a versatile and code-compliant solution for commercial exit applications.

Professional Features & Benefits

• Fire Rated Certification: Listed to ANSI/UL 10C and CAN/ULC-S104 for fire-rated applications, ensuring compliance with fire and life safety codes in commercial and institutional facilities.
• ANSI/BHMA Grade 1 Certified: Certified to ANSI/BHMA A156.3 2014 Grade 1, the highest industry standard, along with ANSI/UL 305 and CAN/ULC-S132 for comprehensive code compliance.
• Wide Stile Grooved Case Design: The 99 Series features a distinctive grooved mechanism case with heavy-duty wide stile push pads, purpose-built for high-use and high-abuse institutional applications.
• Precise Dimensional Specifications: 48" product size with a center case of 8" x 2-3/4" x 2-3/8", a 3/4" latch throw, and a product projection of 3-13/16" for reliable mortise lock integration.
• Fastener Compatibility: Includes fasteners for wood or metal doors 1-3/4" and 2-1/4" thick, supporting a wide range of commercial door configurations.
• Non-Handed Configuration: The device is non-handed (except when specific options such as SD, -2, or SS are applied), simplifying specification and installation across varied openings.
• Field-Configurable Options: A broad range 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 access control integration.
• Upgrade and Retrofit Ready: Compatible with AX (ADA-certified, meets 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, meets NFPA and IBC requirements, 15-second delay), and XP (patented 2-piece latchbolt design) upgrade options.
• Covers Standard Door Cutouts: Compatible with 86 or 161 cutouts on single doors and may cover cutouts on pairs (consult template for pairs applications).

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: 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 and Mixed-Use Properties
• Retail and Institutional Establishments Requiring Fire-Rated Egress Compliance

Delayed Egress Compliance

The 9975F-4FT is compatible with the CX (CHEXIT) delayed egress upgrade, which meets NFPA and IBC requirements for delayed egress applications. When configured with CHEXIT, the 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 98/99 Series mortise exit devices are certified to ANSI/BHMA A156.3 2014 Grade 1, the highest industry standard, and listed to ANSI/UL 10C and CAN/ULC-S104 for fire-rated performance. The 9975F-4FT features a heavy-duty grooved mechanism case with wide stile push pads, engineered specifically 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 exit devices deliver the flexibility and dependability that commercial door hardware professionals demand.