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Author: Subject: Air compressor powered vacuum pump
National Hazard

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[*] posted on 31-10-2017 at 17:08
Air compressor powered vacuum pump

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.

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International Hazard

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[*] posted on 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]
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Texium (zts16)

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[*] posted on 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. :P

So, I can vouch for the device, I just can't guarantee that it will work very well using a household air compressor.

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[*] posted on 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.

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[*] posted on 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.
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[*] posted on 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.
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[*] posted on 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.
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