We have a customer who wants to put our machines into Revit for their building layout. When I export my assembly into an SAT and then reimport it back into a part file to check it, I get the standard message about multiple faces. I've tried several tricks but the end result is that I want a single part without all of the faces.
Have you tried saving out to an IFC file?
Kyle Kens right try the IFC (Industry foundation classes) format new in ST9. I'd be interested to see how you go as I may have a similar requirement.
From Revit after import you may have to create it as a family.