RogueRose - 18-8-2016 at 00:41
Does anyone have a setup where their condensor pump also powers a vacuum aspirator? IDK if this kind of setup is possible or if the pump speed
required to pull vacuum (at least usable) would be too great for a condenser. Anyone have info on this?
Metacelsus - 18-8-2016 at 04:59
There is a thread on this already: https://www.sciencemadness.org/whisper/viewthread.php?tid=68...
In short, a normal condenser pump is not powerful enough.
[Edited on 8-18-2016 by Metacelsus]
XeonTheMGPony - 18-8-2016 at 05:32
Add to that Venturies (Aspirators) depend on volume more then they do pressure drop, to that effect a condenser is like a resister in an electrical
circuit.
So best off using 2 separate pumps.
Good option for a cheap vacuum pump that can pull to 25inches Mercury is an old fridge compressor, especially the ones with an oil cooler line as then
it can be water cooled for longer run times.
Old R-12 (Freon) units will use 150-sus mineral oil, R-134a units use a POE oil and will need to be cleaned out with alcohol then oven dried at 160f
for an hour then recharged with mineral.
Only good thing about a venturie is you needed worry about corrosive vapors and moist gas streams, other wise they really do suck and not in the good
way!
Odds are you got more glass wear then I atm so much easier to build a simple wet scrubber and a drying scrubber to protect an old refer pot
(Refrigeration compressor) My old system used clear 2inch pvc pipes for scrubbers.
bit of work but still a super cheap vacuum pump 
[Edited on 18-8-2016 by XeonTheMGPony]