Revit versions 2023 up to 2024.2 (I don’t have anything newer)
The family uses the concave arc length of a specified circle as part of the revolve shape.
When you attempt to pull the geometry into the Dynamo environment, the resulting solid seems to be taking the convex arc length instead, giving you a much, much larger form.
Not my family file (this is from the Autodesk forums), but this is reproducible with a simplified family file.
Is there an alternate method of getting the solid geometry here?