Vacuum regulators are tricky and expensive things. If you want to crudely control the vacuum in vacuum bagging or vacuum chucking (why you wouldn't want full vacuum is not clear to me) do this. Instead of putting the medical flow control valve between your tank/bag/chuck and the pump, insert a tee in the line and install the valve on the side port of the tee. That way it will leak air into the line and effectively reduce the vacuum. Simple, and it works like a charm. Dan
I have posted pictures of these pumps on my web page, if interested, take a > look
> here is the link
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> I also have posted, at that same location, photos of a muffler and regulator> that may be of interest - the muffler will quiet the exhaust air, or can be> used as an intake air filter, the regulator was originally used to control> the flow of oxygen in a medical device, it ought to be useful as a low flow> rate pressure regulator. I haven't had time to experiment with it yet to> see what the exact characteristics are.>
> I have about 20 each of the mufflers and regulators, and about 30 pumps. >
> > I've finally found another batch of 1/3 HP woble piston vacuum pumps - > they
> > are used not newly rebuilt, but so far the ones I've tested are fine - 22 > to
> > 26 inches of Vacuum. I will eventually put some pictures on my web page,
> > but until then, if anyone is interested, contact me off the list (unmangle
> > my E-mail address below)
> >
> > Prices will be $75 or $85 (there are two types, the more expensive one is > a
> > setup with a cooling fan) plus about $20 for shipping. They are 115VAC > (one
> > is 220VAC). Brands are Gast and Thomas.
> >
> > and, as a reminder, my article on vacuum pumps and chucks is still in the
> > tips section at
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> > Bill - reply to wiilliam_b_noble at msn dot com
> > also check out
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