They would be considered medium temp applications. The ones I've seen run between 0ºF and +10ºF evaporator temps for the drop-in style and a bit higher if you're talking about a raised rail on a prep table.
The ones I came accross run like a freezer.
Usualy subway sandwich tables and also continental coolers with rail section are the ones I work on.But I can't remember the pressure range off the top of my head right now.
Thanks guys. We have a new customer that has bunch of these things, both rail and drop-ins. No problems w/ any of them so far. But, when the time comes. I wanna at least have a clue of what i'm looking at.