Thanks for jumping with the comments Stuart and Matthew 
There’s a nice diagram in one of the Lipsner Smith Manuals you can find online, I’ll attach it here.
I think the purification side of the machine has changed in recent models. But I’d leave that side out.
I was curious what kind of air pump could supply enough pressure for the air knife, and also be able to operate in the solvent filled air happily (although the HFE seems to be very plastic safe). It seems the air intake is within the sealed environment so there’s no air in or out.
I wasn’t sure what would be an affordable fully sealed cabinet. I was thinking an old medical fridge with a glass door, or maybe an electrical circuit breaker box with a clear inspection window, similar to what they use in dusty mines were they need to inspect meters and also protect them.
