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“ mortise cylinder for keyed removable mullion ”

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Answer
What cylinder do I use on a Von Duprin Keyed Removable Mullion?
Von Duprin KR (key removable) mullions requires a 1-1/8" or 1-1/4" mortise cylinder with the standard straight cam, the cam is not inverted. Please see chart below for part numbers. 
instructions
What mortise cylinder cam is needed for KR4023?
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.
Which keyed removable kit is used with a 4754, 4854, 9854, or 9954 mullion?
The Von Duprin 4754, 4854, 9954, and 9854 mullions can be converted or ordered with key removable option. KR54-F kit is the conversion kit to convert the above mullions to key removable mullion.
Von Duprin electrified mullions and handing details.
4754, 4854 and the 9854 are electrified mullions and handed as noted below: 4754 is not handed: Prepared for two 4263 monitor strikes. Use with all Von Duprin rim panic devices 4854 is han...
Is the keyed removable option KR available on Von Duprin aluminum mullions?
Key removable option is not available for any of Von Duprin aluminum mullions.