cylinder for von duprin

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The Von Duprin 370 series control required a 1 1/4" mortise cylinder and will not operate with 1 1/8" mortise cylinder.
Double cylinders are only available on Von Duprin 98/99 Rim and 98/9975 Mortise devices.
 The tailpiece of the rim cylinder can be inserted into the Von Duprin 98/99 rim device either vertical or horizontal.
2021 Update: An updated version of this knowledge entry can be found by clicking HERE.       Part numbers for Schlage and Falcon cylinders for Von Duprin device...
  FALCON   Mortise Rim KIL Conventio...
    If unclear whether mortise, rim, or key-in-lever is needed, reference links below to determine what cylinder type is needed.   In order to determine cylinder type n...
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.
The 98/99 rim device can be converted to double cylinder 98-2 or 99-2. Double cylinder features an inside key cylinder which locks or unlocks the outside trim (Classroom Function) and an outside...
The rim cylinder with thumbturn, XB11-979 (Figure 1) was designed to be installed on the inside head of the Von Duprin 98/99–2 double cylinder exit devices, see Figure 1. The rim cylinder with...