Von Duprin cylinder requirements

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The Von Duprin CD kit comes with the cover plate machined to accept the cylinder dogging mortise cylinder.1 1/4" mortise cylinder with an inverted straight cam is required for CD option on Von Dupr...
Von Duprin does not supply cylinders keyed alike.   Cylinders keyed alike are available from Schlage and Falcon.
The ALK uses a 1 1/4" mortise cylinder with straight cam. (NO DOGGING)
The KR4023 mullion requires a 1-1/4" mortise cylinder with straight cam. This is stated in box 7 on the first page of the KR4023 mullion instructions.
All Von Duprin 370 Series trims require a 1 1/4" mortise cylinder with a straight cam.
A 1 1/4" mortise cylinder with straight cam (similar to the Schlage B502-191) or a 1 1/2" mortise cylinder with straight cam using supplied spacer collar. Cylinder length does not chan...
A 1 1/4" mortise with straight cam similar to the Schlage B502-191 is needed when using Von Duprin 9975 mortise device with 996L-M trim.