WTB: Oxygen Setup

[OutbackNash]

Had some issues with fermentation recently, hoping to improve that side of things so I'm looking to get setup for oxygen as one part of it.

Is any one keen to get rid of an O2 bottle, regulator or an 0.5 micron air stone?

 

[nosco]

I got my set up for around $100. Bottle from Bunnings, reg from ebay and a .2 micron o2 stone kit from Grain and Grape. Theres a pretty recent thread on oxygen set ups that has all the gear info.

 

[Gweedo]

Keg King has air pump, micron filter and SS air difusser kit for $29.95 if your interested in that route. I use that with great success, probably could use a little more punch in the air pump but works non-the-less

 

[Mardoo]

I have one of the small brass, no-gauge regulators that fit the Bernzomatic bottles. You can have it for $10 plus postage.

HOWEVER, I'd recommend going with the ones that fit the Bunnings and Tradeflame bottles, as they're much more cost-effective. The one I have has worked great for me, but the Bernzomatic bottles are the most expensive way to buy oxygen. AFAIK Masters is the only easy place to get them now that Bunnings no longer carries them. Brewman sells a solid wort aeration kit that uses the same bottles Bunnings sells, and comes with one bottle.

Most cost-effective would be a full-size oxygen regulator with a stone and using the Bunnings swap n' go O2 bottles. That bottle will last you for years. However the Bunnings bottle requires a returnable $200 deposit.

 

[Spiesy]

Keg King has air pump, micron filter and SS air difusser kit for $29.95 if your interested in that route. I use that with great success, probably could use a little more punch in the air pump but works non-the-less

Better off using O2 rather than air.

 

[Spiesy]

AFAIK Masters is the only easy place to get them now that Bunnings no longer carries them.

All Tools also sell them.

 

[RobW]

I use one of these:

http://www.brewman.com.au/web/showproduct.asp?prodid=856

Works well.

 

[Gweedo]

Better off using O2 rather than air.

Unless your buying the same bottles as the hospitals use...ie medical grade 02, all the ones at bunnings and supergas for Oxy cutters are not food grade 02 and thus you need a micron filter in place, so please tell me why its better, rather than just slamming my suggestion and walking away

 

[adamthomas]

It does not need to be medical grade. The ones from Reece/bunnings etc are food not medical grade. Medical grade has no moisture making it safe for breathing in. The filter is for the fish pond set up and not required for o2.

 

[mstrelan]

Unless your buying the same bottles as the hospitals use...ie medical grade 02, all the ones at bunnings and supergas for Oxy cutters are not food grade 02 and thus you need a micron filter in place, so please tell me why its better, rather than just slamming my suggestion and walking away

The keg king air pump suggested can only get you to about 8ppm of dissolved oxygen, and takes about 5 minutes. An oxygen (O2) tank can get you to 26ppm, and will get you to the desired 12ppm in 60 seconds.

Sauce: https://www.wyeastlab.com/hb_oxygenation.cfm

 

[Spiesy]

Unless your buying the same bottles as the hospitals use...ie medical grade 02, all the ones at bunnings and supergas for Oxy cutters are not food grade 02 and thus you need a micron filter in place, so please tell me why its better, rather than just slamming my suggestion and walking away

Wasn't "slamming your suggestion and walking away", Chief. Merely stating my opinion based on reading I have done over the years.

Studies have shown that using regular air isn't great for oxygenating wort. Whilst Bunnings O2 might not be categorised as "food grade", it has a shitload more pure oxygen in composition than what regular air does - most of the atmospheric "air" is nitrogen (around 80%), as well as nasty contaminants.

FWIW: I've been oxygenating with Benzomatic oxygen for years now. I don't use a filter. I've never had an infection or a stalled ferment.

 

[idzy]

I have one of the small brass, no-gauge regulators that fit the Bernzomatic bottles. You can have it for $10 plus postage.

HOWEVER, I'd recommend going with the ones that fit the Bunnings and Tradeflame bottles, as they're much more cost-effective. The one I have has worked great for me, but the Bernzomatic bottles are the most expensive way to buy oxygen. AFAIK Masters is the only easy place to get them now that Bunnings no longer carries them. Brewman sells a solid wort aeration kit that uses the same bottles Bunnings sells, and comes with one bottle.

Most cost-effective would be a full-size oxygen regulator with a stone and using the Bunnings swap n' go O2 bottles. That bottle will last you for years. However the Bunnings bottle requires a returnable $200 deposit.

I have done what he said.

 

[SBOB]

I have done what he said.

which part?

 

[MHB]

Just tried to work out the mass of gas in the trade flame bottle, I get about 80 g (just under), Bunnings are asking $53/Bottle, The ones Brewman sells are $55/bottle and hold 136g, 1.7 times as much for $2. Other than the quality of the parts, one of the reasons the kit was designed the way it was, best value for money ongoing.

The option of a bigger industrial bottle that you can keep for an upfront $269, plus an O2 reg and other bits and pieces call it around $350 wasn't available at the time, it is now and if you are willing to pony up the cash wouldn't be a bad option.
If you don't have a Bunnings handy or just want a smaller more compact system, the one from Brewman remains very good value.
Mark

 

[SBOB]

Just tried to work out the mass of gas in the trade flame bottle, I get about 80 g (just under), Bunnings are asking $53/Bottle, The ones Brewman sells are $55/bottle and hold 136g, 1.7 times as much for $2. Other than the quality of the parts, one of the reasons the kit was designed the way it was, best value for money ongoing.

whats that equate to in litres?

the brewman one looks like this, which says 1ltr @ 110bar - http://www.ebay.com.au/itm/HIGH-QUALITY-OXYGEN-DISPOSABLE-BOTTLE-1-LITRE-FOR-USE-WITH-TURBO-OXY-SET-/262271509596

compared to the 930mL of the bunnings one, which from some googling should be 'Compressed at 110 Bar yielding 110 litres of oxygen'

so the difference should be ~70mL or 7%?
or is there some other calculated difference you are using?

 

[MHB]

FWT of O2 is 15.9999ish call it 16.
No of moles = mass / FWT
1 Mole of a gas occupies about 22.4L at STP (Standard Temp and Pressure)

136g/16 = 8.5 Moles X 22.4 = 190L

The ones I'm talking about hold 136g - the Tradeflame bottle doesn't give a mass, just the volume

 

[SBOB]

FWT of O2 is 15.9999ish call it 16.
No of moles = mass / FWT
1 Mole of a gas occupies about 22.4L at STP (Standard Temp and Pressure)

136g/16 = 8.5 Moles X 22.4 = 190L

The ones I'm talking about hold 136g - the Tradeflame bottle doesn't give a mass, just the volume

no, but when finding the same product elsewhere I can find volumes and pressures for both
shouldn't those align with any 'weight' discrepancy?

any googling I do on the oxy-turbo ones that Brewman has shows
- 930ml(or 1L depending on site) / 136g / 110 bar Oxygen Cylinder
-> 110bar means 930ml should yield ~100L
so volume/weight/pressure. volume translated to atmospheric pressure to determine 'yield'

any googling I do for the bunnings one shows the same kind of volume and pressure so I cant see how there could be any significant weight/volume/yield difference..

I know bunnings often sells cheap stuff, but its hard to break the laws of physics and chemistry on a bunch of 2*oxygen molecules stuck together

 

[MHB]

I cant take responsibility for the accuracy of some eBay seller's description.
I do know the ones Brewman sells hold 136g, apply the same equation as above to the information available on the tradeflame bottle and the answer I posted stands - cant **** with physics...

Mark

 

[SBOB]

I cant take responsibility for the accuracy of some eBay seller's description.
I do know the ones Brewman sells hold 136g, apply the same equation as above to the information available on the tradeflame bottle and the answer I posted stands - cant **** with physics...

Mark

indeed you cant
but even disregarding ebay sellers, the pics of the actual bottles shows
930mL/136g @ 110bar (with the tank max rated to 165bar)
http://welduk.com/wp-content/uploads/2013/10/3-x-oxygen.jpg

and because im bored, ive found a pic of the bunnings one which shows (if you zoom and squint)
930mL/136g (and the bunnings details show 110bar)
https://2ecffd01e1ab3e9383f0-07db7b9624bbdf022e3b5395236d5cf8.ssl.cf4.rackcdn.com/Product-800x800/c83274fe-d9e0-4b1f-b8a6-26bcc7c8d85a.jpg

so, im going to have to go with
'both tanks are the same volume/capacity' (but, buy it off Brewman if you can because he's much nicer to talk to than the guy/girl at bunnings who couldnt give a shit about homebrew

 

[MHB]

Sort of, looks like it says 4oz to, which is 113.4g which comes to 158L
So you might be right, would be nice if they published the net weight in the tech specks.
I hate Bunnings - in general soooo much of what they sell is crap and you can never get a straight answer from them -would rather support a home brew specialist, any time.
Mark