Von Duprin 9857-F/9957-F-4 Surface Three-Point Latch Fire Exit Device, 4-Foot Wide Stile, Grade 1

Von Duprin 9857-F/9957-F-4 Surface Three-Point Latch Fire Exit Device, 4-Foot Wide Stile, Grade 1

UL Listed Fire-Rated Three-Point Latching for Heavy-Duty Institutional Applications

The Von Duprin 9857-F/9957-F-4 is a 48" surface-mounted three-point latch fire exit device engineered for demanding institutional environments including schools, hospitals, and government buildings. UL listed for fire exit hardware per ANSI/UL 10C and certified to ANSI/BHMA A156.3 2014 Grade 1, this device delivers the highest level of code-compliant egress protection. The 9857-F features a smooth mechanism case while the 9957-F features a grooved mechanism case, both sharing identical performance characteristics. Fasteners are included for wood or metal doors 1-3/4" thick, and the device is non-handed except when the SS (signal switch) or WS (windstorm) option is selected.

Professional Features & Benefits

• Three-Point Latching Security: Deadlocking anti-friction top and bottom bolt with 5/8" throw and a deadlocking rim bolt with 3/4" throw provide superior door security and fire containment performance.
• Fire-Rated Construction: UL listed per ANSI/UL 10C (fire-rated) and CAN/ULC-S104 (fire-rated), ensuring full compliance with fire exit hardware requirements for life-safety applications.
• Grade 1 Certified Performance: ANSI/BHMA A156.3 2014 Grade 1 certified and ANSI/UL 305 and CAN/ULC-S132 listed, meeting the highest industry standards for exit device durability and reliability.
• Wide Stile Push Pad Design: 48" heavy-duty wide stile push pad with a center case measuring 8" x 2-3/4" x 2-3/8" and a product projection of 3-13/16" for a robust, architectural profile.
• Non-Handed Versatility: Non-handed configuration simplifies specification and installation across a wide range of door openings, except when SS or WS device options are selected.
• Field-Selectable Functions: EO/DT/NL functions are field selectable; for TP, K, or L functions, simply remove the NL drive screw from the device, enabling flexible on-site configuration.
• Retrofit and Upgrade Ready: Compatible with CDSI/HDSI security dogging indicators, QEL electronic latch retraction, RX request-to-exit switches, LX latchbolt monitoring, AX accessible device option (5 lb. force ADA compliant), CX CHEXIT delayed egress, and XP patented 2-piece latchbolt design.
• Vertical Rod and Latch Guards Available: Optional vertical rod and latch guards protect the bottom rod from damage caused by impacts from carts or gurneys passing through doors in high-traffic institutional settings.
• Included Fasteners: Fasteners included for wood or metal doors 1-3/4" and 2-1/4" thick, streamlining installation across common commercial door configurations.

Technical Specifications

• Product Group: Exit Devices and Trim
• Series: 98 & 99 Series
• Fasteners: Included for wood or metal doors 1-3/4" and 2-1/4" thick
• Product Subgroup: Exit Devices - Vertical Rod
• Product Type: Exit Devices - Three-Point Latch
• Subcategory: Surface Three-Point Latch Exit Devices
• Latch Throw: Deadlocking anti-friction top and bottom bolt, 5/8 throw, Deadlocking rim bolt, 3/4" throw
• Grade: Grade 1
• Commercial/Residential: Commercial
• Stile Type: Wide Stile
• Center Case Dimensions: 8" x 2-3/4" x 2-3/8"
• MAP Policy: Yes
• Product Function: EO/DT/NL (field selectable). For TP, K or L remove NL drive screw from device.
• Door Hand Direction: Non-Handed
• Door Thickness Range: 1-3/4"
• Product Size: 48"
• 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 (Hospitals and Medical Centers)
• Government and Municipal Buildings
• Commercial Office Buildings
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties
• Retail Establishments Requiring Fire-Rated Egress Compliance

Why Choose Von Duprin Quality?

Von Duprin fire exit devices are engineered to meet the most rigorous life-safety standards, with the 9857-F/9957-F-4 certified to ANSI/BHMA A156.3 2014 Grade 1 and UL listed per ANSI/UL 10C, ANSI/UL 305, CAN/ULC-S104, and CAN/ULC-S132. The 98/99 Series wide stile push pad platform is purpose-built for high-use and high-abuse institutional environments including schools, hospitals, and government facilities, with a breadth of field-configurable options and retrofit kit compatibility to keep pace with evolving facility needs. When dependable, code-compliant fire exit performance is essential, Von Duprin delivers the professional-grade reliability that architects, specifiers, and facility managers trust.