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Von Duprin 996L-NL Lever Night Latch Trim for 98/99 Series Exit Devices
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Von Duprin 990NL Night Latch Trim — 98/99 Series Exit Devices
The Von Duprin 990NL is a pull trim with Night Latch (NL) function for the 98/99 Series exit device family. Night Latch / Storeroom function: the key retracts the latchbolt from the outside; the lever or knob is rigid and cannot be turned without the key. The panic bar always allows free egress from the inside. This is the correct trim for storeroom, storage room, and secured-access doors where outside entry must be key-controlled at all times.
Device Compatibility
The 990NL is available in two lock-type configurations to match your existing 98/99 Series device:
- Mortise (M): for 98/99 Series devices with a mortise cylinder prep
- Rim / Surface Vertical Rod / Concealed Vertical Rod (R/V): for Rim, SVR, and CVR device configurations
Select the lock type that matches your installed or specified exit device. The trim is non-handed — no handing required at time of order.
Key Specifications
- Function: Night Latch (Storeroom) — key retracts latchbolt; outside lever/knob is rigid
- Compatible Series: Von Duprin 98 & 99 Series exit devices
- Lock Types: Mortise; Rim / Surface Vertical Rod / Concealed Vertical Rod
- Handing: Non-Handed
- Center-to-Center (CTC): 5-1/2"
- Duty Level: Heavy Duty
- Grade: Grade 1 (ANSI/BHMA A156.3 2014)
- Application: Commercial
Certifications
- ANSI/BHMA A156.3 2014 — Grade 1
- ANSI/UL 10C (fire-rated configurations)
- ANSI/UL 305
- CAN/ULC-S104 (fire-rated configurations)
- CAN/ULC-S132
Available Finishes
- 605 — Bright Brass (US3)
- 606 — Satin Brass (US4)
- 612 — Satin Bronze (US10)
- 613 — Oil Rubbed Bronze (US10B)
- 619 — Satin Nickel (US15)
- 622 — Matte Black (US19)
- 625 — Bright Chrome (US26)
- 626 — Satin Chrome (US26D / 26D)
- 643E — Aged Bronze
- 693/SPBLK — Black Painted
- 695/SP313 — Dark Bronze
Resources & Downloads
Manufacturer Resources
Von Duprin 98/99 Series Catalog
Product Specs
- Series:
- 98 & 99 Series
- Grade:
- Grade 1
- Duty Level:
- Heavy Duty
- Product Group:
- Exit Devices and Trim
- Product Subgroup:
- Exit Device Trim
- Product Type:
- Exit Device Trims
- Subcategory:
- Exit Device Trim
- Commercial/Residential:
- Commercial
- Product Model:
- 990NL
- (CTC) Center-to-Center:
- 5-1/2"
- Product Function:
- Night Latch
- Door Hand Direction:
- Non-Handed
- Trim Hardware:
- Night Latch
- Product Category:
- Exit Devices and Trim
- Department:
- Door Hardware
Von Duprin 990NL-M 26D – Frequently Asked Questions
1) What is the Von Duprin 990NL night latch used for?
The 990NL night latch provides nighttime security for Von Duprin 98/99 series exit devices. It prevents outside access while maintaining interior egress capability. The night latch locks the outside lever or thumb piece to secure the door after hours.
2) Which Von Duprin exit devices is the 990NL compatible with?
The 990NL night latch is designed specifically for Von Duprin 98 and 99 series exit devices. It works with both 98 rim devices and 99 mortise devices. Verify your exit device series before ordering to ensure proper compatibility.
3) Does the 990NL night latch affect door handing?
The 990NL is field reversible for right hand or left hand doors. The night latch can be configured during installation to match your specific door handing. No separate left or right hand models are required.
4) What finishes are available for the 990NL night latch?
The 990NL typically comes in standard Von Duprin finishes including 613 oil rubbed bronze, 626 satin chrome, and 628 satin aluminum. Verify finish availability with your specific exit device finish for proper matching.
5) Does the 990NL night latch require power or special wiring?
The 990NL is a mechanical night latch that requires no electrical power or wiring. It operates through manual key control from the outside and thumb turn operation from the inside. This makes installation simpler with no electrical connections needed.
6) Are there building code considerations for the 990NL night latch?
Night latches must comply with egress requirements in your local building code. The 990NL maintains single motion egress from the inside while providing security from outside. Verify code compliance for your specific application and occupancy type.
7) What components are included with the 990NL night latch?
The 990NL typically includes the night latch mechanism, mounting hardware, and installation instructions. Keys and cylinders may be ordered separately depending on your keying requirements. Check the complete parts list for your specific configuration.
8) How is the 990NL night latch installed on exit devices?
The 990NL mounts to the exit device trim using the provided hardware. Installation requires basic mechanical skills and standard tools. Follow the manufacturer installation template and instructions for proper alignment and operation.
9) How do you maintain and adjust the 990NL night latch?
Regular maintenance includes lubricating the mechanism with appropriate lock lubricant and checking operation. The latch should engage and disengage smoothly with key operation. Adjust mounting if the latch binds or fails to fully engage.
10) What other Von Duprin night latch models are available?
Von Duprin offers various night latch options for different exit device series. The 996L works with other device models. Browse our Von Duprin collection for compatible night latches and exit device accessories.
11) Can the 990NL be used in high traffic applications?
The 990NL is built for commercial grade applications and can handle regular use. For extremely high traffic situations, consider the duty rating of your complete exit device system. Heavy use may require more frequent maintenance and inspection.
12) What are the key measurements for the 990NL night latch?
The 990NL is sized to work with standard Von Duprin 98/99 series trim dimensions. Verify door thickness and trim compatibility before installation. Consult the manufacturer specifications for exact measurements and clearance requirements.
How fast can I get the Von Duprin 990NL-M 26D delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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U.S.
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Von Duprin 990NL-M 26D come with a warranty?
Absolutely. The Von Duprin 990NL-M 26D is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Von Duprin 990NL-M 26D?
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