Von Duprin 9975-4FT 4 ft Grooved Case Wide Stile Mortise Exit Device with Hex Key Dogging

Von Duprin 9975-4FT 4 ft Grooved 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 9975-4FT is a 4-foot (48") wide stile mortise exit device from the renowned 98/99 Series, engineered for demanding institutional environments including schools, hospitals, and government buildings. Featuring a distinctive grooved mechanism case, this heavy-duty push pad device is certified to ANSI/BHMA A156.3 2014 Grade 1 standards and listed under ANSI/UL 305 and CAN/ULC-S132, ensuring compliance with the most rigorous industry requirements. Designed for use on single and double doors with mullion, the 9975-4FT accommodates 1-3/4" door thickness and covers stock hollow metal doors with 86 or 161 cutouts on single doors. The device is non-handed, offering flexible installation across a wide range of commercial openings.

Professional Features & Benefits

• Wide Stile Heavy-Duty Push Pad: Designed as a wide stile device with a grooved mechanism case, the 99 Series push pad delivers architectural distinction and robust performance for high-use institutional applications.
• 48" Product Size: The 4-foot (48") case length accommodates wide commercial door openings, making it ideal for high-traffic entryways in institutional and commercial facilities.
• 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 across common commercial door types.
• Precision Latch & Case Dimensions: Features a 3/4" latch throw and a center case measuring 8" x 2-3/4" x 2-3/8", with a product projection of 3-13/16" for reliable latching performance and consistent door clearance.
• ANSI/BHMA Grade 1 Certified: Certified to ANSI/BHMA A156.3 2014 Grade 1, the highest industry standard for exit devices, along with ANSI/UL 305, ANSI/UL 10C (fire-rated configurations), CAN/ULC-S104 (fire-rated configurations), and CAN/ULC-S132 for comprehensive compliance.
• Non-Handed Design: The rim device is non-handed (except when SD, -2 Double Cylinder, or SS signal switch options are used), simplifying specification and reducing inventory requirements for facility managers.
• Hex Key Dogging: Equipped with hex key dogging for convenient hold-open functionality, allowing the latchbolt to be retracted and held for high-traffic periods without requiring a key.
• Field-Configurable Options & Retrofit Kits: 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 (Request to Exit RX and Latchbolt Monitoring LX) for integration with access control systems.
• Upgrade Options Available: 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 (15-second delay per NFPA and IBC requirements), and XP patented 2-piece latchbolt design.

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 Properties

Delayed Egress Compliance

The Von Duprin 9975-4FT 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 facilities requiring controlled exit management.

Why Choose Von Duprin Quality?

Von Duprin mortise exit devices from the 98/99 Series are certified to ANSI/BHMA A156.3 2014 Grade 1, the highest industry standard, and listed under ANSI/UL 305 and CAN/ULC-S132 for comprehensive compliance across commercial applications. The 9975-4FT features a heavy-duty grooved mechanism case with a 3/4" latch throw and center case dimensions of 8" x 2-3/4" x 2-3/8", engineered for reliable performance in the most demanding institutional environments. With a broad range of field-configurable options, retrofit kits, and upgrade paths, Von Duprin delivers the flexibility and durability that schools, hospitals, and government facilities depend on.