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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.
Manufacturer Resources
Von Duprin 98/99 Series Catalog
Product Specs
- 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
Von Duprin VON-9857-F-4-626 – Frequently Asked Questions
1) Will the Von Duprin 9857-F/9957-F three-point latch fit a 1-3/4 inch door?
Yes, and 1-3/4 inches is the only thickness it is built for. The 9857-F/9957-F is a single-thickness device. Fasteners ship in the box for wood or metal doors 1-3/4 inches and 2-1/4 inches thick, so if your leaf is thinner than 1-3/4 (an older 1-3/8 inch interior door, for example), this is not the device for that opening.
2) What does a three-point latch exit device do that a regular vertical rod device does not?
A three-point latch bolts the door at the head, the threshold, and the strike jamb. The 9857-F/9957-F carries deadlocking anti-friction top and bottom bolts with 5/8 inch throw plus a deadlocking rim bolt with 3/4 inch throw at the lock edge. That third point at the jamb is what a two-point surface vertical rod device does not give you, and it is why these get specified on tall, high-abuse institutional openings where the leaf can flex and on fire doors that have to stay tight in the frame under pressure.
3) Is the Von Duprin 9857-F/9957-F fire rated, and what standards is it listed to?
Fire rated, yes. It is UL listed for fire exit hardware per ANSI/UL 10C and CAN/ULC-S104, listed to ANSI/UL 305 and CAN/ULC-S132 for panic hardware, and certified to ANSI/BHMA A156.3 2014 Grade 1. That combination is what a fire door assembly inspection and a Grade 1 institutional spec both want to see, and the F in the model number is the fire designation.
4) Do I have to order the Von Duprin 9857-F left hand or right hand?
Non-handed as supplied, so one device covers either swing. Two exceptions change that: specify the SS signal switch or the WS windstorm option and the device becomes handed. Trim is a separate matter. Lever and night latch trims are ordered LHR or RHR, so even on a non-handed device you still need the hand of the door to pick the 996L lever or 990NL night latch trim.
5) Will a 48 inch Von Duprin 98/99 exit device work on my door width?
The 4-foot size covers openings up to 48 inches wide. Von Duprin push pad devices are sized to the leaf, so measure the door itself, not the frame opening. This is a wide stile device, which means it needs a stile deep enough to take the 8 x 2-3/4 x 2-3/8 inch center case; narrow stile aluminum storefront doors take a different device family entirely.
6) Will the Von Duprin 9857-F latch into the strike hardware already on my frame?
Check the throw before you assume it drops in. Top and bottom bolts throw 5/8 inch into head and threshold strikes, and the rim bolt throws 3/4 inch at the jamb. A three-point device needs all three strikes prepped, a head strike, a floor or threshold strike, and a rim strike at the lock edge, so replacing a two-point vertical rod device means adding frame prep at the jamb that was not there before.
7) Can the function of a Von Duprin 98/99 exit device be changed in the field?
EO, DT, and NL are field selectable on the device. If you are going to a thumbpiece, knob, or lever function (TP, K, or L), you remove the NL drive screw from the device. That matters for a facility standardizing across a building: the same device body can be set up exit-only on a stair door and night latch on a service door without a different part number.
8) What is the difference between the Von Duprin 9857-F and the 9957-F?
Case appearance only. The 98 Series has a smooth mechanism case, the 99 Series a grooved one. Performance, listings, and dimensions are identical, so pick whichever matches the other devices already in the building. Both are offered in the same twelve finishes, including 626 satin chrome, 630 satin stainless, 613 oil rubbed bronze, 710 dark bronze anodized, and 711 flat black.
9) How far does a Von Duprin 98/99 push pad device stick out into the opening?
Projection is 3-13/16 inches off the door face. Worth checking on a pair of doors in a tight vestibule or where a door swings against a wall or an adjacent leaf, and worth checking against required clear width at the opening before you commit.
10) What electrified options can I get on a Von Duprin 9857-F fire exit device?
LX latchbolt monitor, RX request to exit, RX2 double request to exit, E electric locking and unlocking trim, EL electric latch retraction, QEL quiet electric latch retraction, SS signal switch, ALK alarm exit kit, and WP-RX waterproof request to exit. If you are tying the door into access control and want the outside trim to release on a card read, that is the E option; if you want the device itself to retract and the door to pull free, that is EL or QEL. RX and LX only report, they do not unlock.
11) Is there an ADA compliant low-force version of the Von Duprin 98/99 exit device?
The AX accessible device option is the one to specify. It brings operating force down to 5 lb., which is what gets the opening into ADA compliance where a standard push pad would not. Other retrofit-and-upgrade options on the same platform include CDSI/HDSI security dogging indicators, QEL latch retraction, RX and LX switches, CX CHEXIT delayed egress, and the XP patented two-piece latchbolt.
12) Can I dog down a fire rated exit device to hold the door unlatched during the day?
No. This is fire exit hardware, and fire rated devices do not get mechanical dogging, because the door has to latch every time to hold the assembly closed in a fire. If you need the latch held back during business hours on this opening, the electrical route is the option to look at, QEL quiet electric latch retraction, which retracts the latches on a signal and drops them on alarm or power loss. CDSI/HDSI dogging indicators are available on the platform where dogging applies.
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Does the Von Duprin VON-9857-F-4-626 come with a warranty?
Absolutely. The Von Duprin VON-9857-F-4-626 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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