My question is in regards to what vacuum pump you guys are using. Any of you using a venturi style with compressed air? There are a couple that are rated for up to 28" and only need anywhere from 4 to 7 SCFM to operate, and around 60 to 120 sec to get one cubic foot down to 27-28". The price is fairly inexpensive compared to some other pumps. Check this link out. I was looking at the JS150M for $107. If you scroll down there is a couple charts with specs.
http://www.vaccon.com/inline.html
I figure you do not have to worry so much about the vapors messing up the venturi since there are no moving parts, and you can flush it out with solvent if there was an "accident".
I know that some folks are building their own pumps out of fridge compressors, but I am not inclined to build that right now.
Also, what are you using for vacuum chambers?
http://www.vaccon.com/inline.html
I figure you do not have to worry so much about the vapors messing up the venturi since there are no moving parts, and you can flush it out with solvent if there was an "accident".
I know that some folks are building their own pumps out of fridge compressors, but I am not inclined to build that right now.
Also, what are you using for vacuum chambers?