Von Duprin 110MD-NL Nightlatch Cylinder Assembly, Metal Door Prep, For Von Duprin 22/55/88/98/99 Series Devices, Grade 1

The Von Duprin 110MD-NL Nightlatch Cylinder Assembly is a factory-engineered exterior trim component designed for metal door preparations and compatible with Von Duprin 22, 55, 88, 98, and 99 Series exit devices. In nightlatch (NL) function, a key retracts the latch to allow entry from the exterior, giving facilities dependable pull-side access control without adding a full lever trim. Built to Grade 1 durability standards, this assembly delivers the reliability expected in high-traffic commercial and institutional openings. It is a straightforward replacement or upgrade for existing rim and vertical rod devices, keeping your exit hardware secure, code-compliant, and easy to operate.

Features

• Nightlatch (NL) function allows keyed entry from the exterior while maintaining free egress from inside.
• Prepared for metal door applications for a clean, secure fit on hollow metal openings.
• Compatible with Von Duprin 22, 55, 88, 98, and 99 Series exit devices.
• Grade 1 construction for demanding commercial use.
• Cylinder-driven operation for straightforward keyed access control.

Functional Details

The nightlatch trim uses a cylinder to retract the latch from the outside, allowing controlled entry while the exit device continues to provide unobstructed egress from the interior at all times.

• Key retracts latch for exterior entry.
• Free egress at all times from the inside.

Included Components

The 110MD-NL assembly includes the exterior nightlatch cylinder trim components required for a metal door installation. The mortise cylinder is ordered separately unless otherwise specified.