Product Description
QEL9975NL-US28-4 Von Duprin 9975 Series with 990NL Night Latch Trim Mortise Lock Exit Device with Quite Electric Latch in Anodized Aluminum
The QEL9975NL-US28-4 is a Von Duprin 9975 Series Mortise Lock exit device in Aluminum (US28/628), sized for 4' doors. Night Latch — outside lever locks and unlocks by key, inside always free for egress. Ships less cylinder — order a mortise cylinder separately to match your existing keyway.
Quiet Electric Latch Retraction — QEL motor-driven latch retraction provides quiet, ADA-compliant remote unlocking. 24VDC power required.
ANSI/BHMA A156.3 Grade 1 certified. Hex key dogging standard. Field reversible handing.
Pro-Tip from Our Locksmiths: Mortise lock exit devices (9975) require a mortise pocket prepped into the door edge. On retrofit jobs, verify the existing mortise prep is compatible with Von Duprin's 9975 body dimensions. A Schlage L-series prep is close but not identical — don't assume cross-compatibility.
| Specifications | |
|---|---|
| Part Number | QEL9975NL-US28-4 |
| Brand | Von Duprin (Allegion) |
| Series | Von Duprin 9975 |
| Function | Night Latch |
| Grade | ANSI/BHMA A156.3 Grade 1 |
| Mount Type | Mortise Lock (mortise body recessed into door edge) |
| Finish | Aluminum (US28/628) |
| Door Size | 4 Foot |
| Cylinder | Ships less cylinder |
| Fire Rating | Non Fire Rated |
| Electronics | Quiet Electric Latch Retraction |
- Von Duprin 9975 Series touch bar mechanism — Grade 1 architectural-grade panic hardware
- Mortise Lock (mortise body recessed into door edge)
- Aluminum finish
- Quiet Electric Latch Retraction — QEL motor-driven latch retraction provides quiet, ADA-compliant remote unlocking
- Hex key dogging standard — hold latch retracted during business hours
Image shown is representative of the product line. Actual finish, trim, and configuration may vary by SKU.
