High all, I'm new here.
I found this thread, and wanted to say that yes, you certainly can vape salvia, but not every vape will do, as some of them won't reach the high temperatures required. So I thought I'd point you in the direction of these 3 threads on this very subject, with over a hundred post between them, over at
Fuck Combustion forums - the be-all and end-all site for knowledge on vapes and vaping:
http://www.fuckcombustion.com/viewtopic.php?id=5216
http://www.fuckcombustion.com/viewtopic.php?id=184
http://www.fuckcombustion.com/viewtopic.php?id=738
By the way, they tend to use a lot of acronyms over at FC, especially for the names of vape models, so
here's another thread all about those, to help you though any confusion.
Mind you, I've never vaped salvia myself, as I'm from Australia, where it has been criminalised,

but I did smoke it many years before that legislation came into being, as well as more recently, when I was in Southwestern China of all places (!). But now that I have a vape that would absolutely do the trick (a Silver Surfer) I'd love to try vaping it. I think it would be really interesting to experience Sally without the inevitably somewhat contaminating effects of that really harsh smoke.
It's worth keeping in mind though, that whatever vape you use, it's probably going to give any pieces that come in contact with the vapour a bit of a weird smell, which isn't what you want if you're also using it for weed (or anything else). This isn't much of a problem with a lot of vapes, as those pieces may be easy to clean, or available as spares (like the 'whip' on the Silver Surfer, and other whip vapes) which you can reserve just for salvia use. But some, like my Magic Flight Launch box, aren't so easily cleaned, and are likely to end up smelling pretty dodgy if you make a habit of running salvia through them (having said that, the Launch Box is otherwise a fantastic little device).