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O2 Concentrator

Several of you have asked where I got the O2 concentrator that I
wrote about earlier. Go to

or do a search on Extreme O2. You will find a lot of hits in the
glass working sites. Rob

Rob Meixner

I have been posting notes regarding the progress of integrating my
EX10 O2 concentrator into my shop. So far so good. Previously I had
indicated that, when soldering silver, there is no difference
between using O2 cylinders and the concentrator. This continues to
be the case. The real test was today. I was able to cast a 35 gram
silver ingot with no trouble at all. This is the largest ingot that
I cast, so it looks like I should be able to get along just fine
with the concentrator. Time will tell regarding its reliability.
More when I know it. Rob

Rob Meixner

I posted about 5 years ago concerning the Extreme o2 concentrators.
I had used a customer owned 150 cf cylinder for over 30 years. In
that timeperiod the original company sold out three times making my
nearest place to exchange my cylinder an hour and a half drive one
way. Found a place finally willing to fill it with their compressor,
not exchange it,12 miles from my shop. Turns out they had a
mechanical problem with their compressor but it so happens they made
an O2 concentrator and would lend me one for the duration of the
repairs, Turns out it was the Extreme Air factory! After the two
weeks they filled my cylinder for free for the trouble and sold me
the concentrator at a severe reduction in price. (Theysaid it was
because I was local and after all my 2 week usage, it was a"used
machine"!)I ended up with the smaller ex-5 and it does everythingI
need but very large melts. The shut off noise is disconcerting at
first but when I heard a half dozen machines do the same thing, felt
allot more confident. They rebuild medical grade concentrators to
give the extra line pressure for torches and the purity of the o2
exceeds medical grade standards. Trick they showed me to cut down on
the few minutes it takes to get up to purity is to leave the o2
valve open on your torch whenstarting. Cuts the time in half and all
you’re doing is adding a littlemore oxygen to your shop air. Once
the purity is up and you have been using it you also can totally
turn off the machine for a half hour or so and once you restart, it
is close to being fully warmed up. Good product 5 years down the
line, good people to work with. They did warn me withmy usage that
in 10-15 years I might need the nitrogen absorption chemical
replaced. Gary


I have 3 pcs EX 15 concentrators in parallel. I originally brought
them for my glass bead lamp working. I needed lot of oxygen for my
bench burner.

Now I’m using one of them for the jewelry work. Mostly I need the
heat for gold casting.

I’m been very happy of these concentrators. Those are safer and
cheaper in the long run.

The only draw back is the low buzzing and the need to have the
oxygen flowing all the time.


This is good news. My EX10 is working fine and I did figure out that,
if you leave the O2 valve open on the torch, it will get up to O2
purity in just a couple minutes. I leave it open most of the time
other than when actually lighting the torch. The only noise other
than a low hum is the a slight regular click. I suspect that it is
how the generation potion of the unit maintains whatever pressure it
maintains internally. So far so good. Rob

Rob Meixner