KR – Keyed Removable Steel Mullions makes removal faster and easier by a single operation of the mortise cylinder.
Once mullion is removed, large equipment or furniture can freely pass through the opening.
The unit will self lock when re-installed, without use of the cylinder key. Uses a 1-1/4" mortise cylinder with a straight cam (Schlage cam reference B502-191). Cylinders are sold separately.
Prefix mullion model with “KR”

A keyed removable mullion from Von Duprin now carries the UL fire label for openings up to 8'0".
It delivers single-door performance and security on double fire-door applications.

When large equipment or furniture must pass through an opening, it makes mullion removal a simple key cylinder operation.
The unit will self-lock when re-installed, without the need to re-use the cylinder key. The new assembly is available in Von Duprin's 1654, 4954, 9854 and 9954 steel mullions.

The mullion assembly is ideal for exterior doors and has been tested to over 10,000 operations. It also has passed static load and impact tests.