NeonPulse - 31-10-2017 at 17:08
I was looking to one of these possibly for purchase to use mostly for filtration. It supposedly pulls a decent vacuum of 28 inches of mercury in two
mins. The problem I guess is that you need an air compressor to run it. I was just wondering if anybody has one of these or has used one and their
experience with it.
zed - 31-10-2017 at 17:44
That, is a fairly large volume of air. Gonna need a pretty good compressor.
[Edited on 1-11-2017 by zed]
Texium - 31-10-2017 at 19:24
I use one of those at work for vacuum filtration and it's perfect, but we have compressed air lines in the lab, presumably from some giant centralized
air compressor. I don't know, I open the valve and air comes out. Guess I'm spoiled. 
So, I can vouch for the device, I just can't guarantee that it will work very well using a household air compressor.
Twospoons - 31-10-2017 at 22:17
It will work just fine with a domestic compressor, but they use a lot of air, so the compressor will be running a lot (=noise). More efficient just to
use a mechanical vacuum pump and ditch the venturi.
Dr.Bob - 1-11-2017 at 07:14
I agree with the above, it will require massive amounts of air, so unless you have a 20-30+ gallon compressor already it is useless. And once the air
is off, the vacuum fails. You can find cheap vacuum pumps if you look around, even a simple aspirator works as well, and can run on tap water or a
simple pump, much more efficient than an air venturi in my experience.
Mesa - 6-11-2017 at 05:33
You could just remove the air filter on your compressor and attach an appropriate sized barb directly to the intake. I ran a setup like that, with a
dry ice/acetone cold trap, as my first vacuum apparatus for about 6 months. Only reason I stopped is due to the local BOC gas closing down.
kadriver - 7-11-2017 at 20:36
You can get an HVAC vacuum pump at Harbor Freight for about $100 USD. I've been using one for the last seven years. They are bullet proof. I use it
frequently, keep the oil changed every couple of months.
This could be used to pull a vacuum on a fairly large system. Much cheaper than an expensive lab quality vacuum pump.
