mortise panic device fucntion

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MPD; FEH
FEH, F, Exit Device (rim panic, mortise panic, vertical rod panic, panic device)
We don't recommend to use the old style hex dogging kit into the new 98/99 exit device but it would fit as long as the device is not fire rated.
A standard exit device can't be modified to a fire rated exit device.  A new device must be purchased.
The Von Duprin 2227 or 2227-F  exit device is available less bottom rod.  Specify 2227-LBR or 2227F-LBR for fire.
We can build 33/3527A/F, 33/3547A/F, 98/9927/F, and 98/9947/F exit devices for 2 feet wide doors.
The Von Duprin Pneumatic PN98/99 series exit devices feature provides remote latch bolt retraction in hazardous areas where electrically operated devices would not be permitted.
The Von Duprin Pneumatic or "PN" device was designed for Intrinsically Safe Class 1, Division 1 applications.