vacuum generator

Eric, As a start you might want to go to this site:

HTH PJ

I used to make them at my old job. Yes it works by using a venturi. I don't have the dimensions. I do have one that ended up in the scrap.

Mike H

I'm pretty sure they're just a special venturi too.

They sell them for air conditioning use. I personally have no experience using one, but have heard they're slow, and don't do as good a job as a real vacuum pump. Also heard if used a lot, can generate whopping electric bills due to excessive compressor run times.

Why not use the intake port of the air compressor to create a vacuum?

That's what I do when I vacuum bag my composite layups.

I have a word doc somewhere if y'all are interested.

Bart D. Hull snipped-for-privacy@inficad.com Tempe, Arizona

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Eric J. Comeau wrote:

Expensive to operate, poor vacuum, and loud pretty much sums these up.

If you want a project to build, converting an old compressor or lawnmower engine (or V8, whatever suits your needs) into a vacuum pump is a heck of a lot better project. Or machine the whole thing up from raw stock, if that suits you better. You can also buy half-decent vacuum pumps surplus for not too much money.

Harbor Fright sells them for ablut $9

jk

I was been told by an air conditioning instructor that they work fine for very occasional use. Otherwise, the warnings about the electric bill on the compressor / compressor wear are valid.

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