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co2 bottles vs compressed air bottles

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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co2 bottles vs compressed air bottles

Unread postAuthor: wyz2285 » Sun Jul 24, 2011 3:53 pm

Hi guys, I found a paintball store today, and they selles co2 bottles and compressed air bottles.
That´s the difference between them? apparently there are a difference in price, for the bottle of theme size :roll:
And what means 12 oz for a co2 bottle?
I´m goinh to use compressed air, will a co2 bottle work? they are cheaper :)
Thx
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Unread postAuthor: jackssmirkingrevenge » Sun Jul 24, 2011 4:04 pm

Compressed air bottles can usually take 3000-4500 psi, CO<sub>2</sub> bottles are rated for less.

12oz means it can hold 12 ounces of CO<sub>2</sub>.
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Unread postAuthor: Mr.Tallahassee » Sun Jul 24, 2011 4:12 pm

Compressed air (HPA) tanks have better performance than CO2 due to the density of the gas. HPA tanks are pressurized as high as 4500 psi while CO2 remains pressurized to around 870 psi as a liquid. CO2 is also measured by weight as a liquid. If you use pressure below 800psi co2 bottles will work for air unless you want to use higher pressure(I don't know why you would though. That's a lot of pressure. :shock: )
EDIT: JSR, you beat me to it. :lol: Oh well.
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Unread postAuthor: Crna Legija » Mon Jul 25, 2011 1:30 am

try get one that is aluminium or fibreglass, if its steel you will need to coat the inside with anit-rust paint because air your compressor sucks in is wet and will start to rust the inside slowly
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Unread postAuthor: Gippeto » Mon Jul 25, 2011 2:11 pm

Mr.Tallahassee wrote:Compressed air (HPA) tanks have better performance than CO2 due to the density of the gas. HPA tanks are pressurized as high as 4500 psi while CO2 remains pressurized to around 870 psi as a liquid. CO2 is also measured by weight as a liquid. If you use pressure below 800psi co2 bottles will work for air unless you want to use higher pressure(I don't know why you would though. That's a lot of pressure. :shock: )
EDIT: JSR, you beat me to it. :lol: Oh well.


Close...but not quite accurate.

Paintball co2 tanks have a maximum service pressure of 1800psi and are entirely safe to use up to that pressure. Proof pressure on these is 3000psi...same as the burst disc.

The pressure available from co2 is VERY temperature dependent.

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Unread postAuthor: Lockednloaded » Tue Jul 26, 2011 11:10 am

I have some old co2 tanks that I regularly charge to 2000psi with my hand pump. I also have a 48cu inch HPA tank that I charge to 3000 psi manually, the difference in price comes from the HPA tank's built in regulator. It doesn't matter to me because I hook it up to my regulator, but if you're going "unregged" the HPA tank would be more consistent.

For reference of shots per fill:
20oz co2 at 2000 psi - 100 shots in my paintball semi at 200 psi
12oz co2 at 2000 psi - 50 at 200psi
48cu in HPA at 3000 - about 200 shots
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Unread postAuthor: wyz2285 » Tue Jul 26, 2011 4:18 pm

Thanks for all the help :D
I have bought 2 aluminium bottles, one is for compressed air, rated to 3000 psi, and one for co2, rated to 1800. As I´m only going to use 1000 psi(the best I can do at home :( ), both of them will be fine I holp :roll: .
Now I only have to concentrate on what I´m going to build next :twisted: :D but I´m sure it will be loud and powerful :twisted:
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Unread postAuthor: wyz2285 » Wed Jul 27, 2011 4:40 am

Sorry for the double post, but I got a big problem.
the bottles are 5/8" , and I can´t find a adapter for it, I have looked everywhere, even on ebay, but there is nothing that works and ships to portugal :(
I´m looking for something like 5/8" male to 1/4" female
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 27, 2011 5:30 am

wyz2285 wrote:the bottles are 5/8" , and I can´t find a adapter for it, I have looked everywhere, even on ebay, but there is nothing that works and ships to portugal :(
I´m looking for something like 5/8" male to 1/4" female


Are you sure, can you post a photo of the thread and some dimensions?
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Unread postAuthor: wyz2285 » Wed Jul 27, 2011 5:46 am

I´m sure, it´s written on the bottle :roll:
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Attachments
IMG077.jpg
compressed ar bottle
IMG078.jpg
co2 bottle, it doesn´t say the dimension
IMG079.jpg
co2 bottle
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 27, 2011 5:54 am

So you just bought the bottle without any valve whatsoever?

If so this should fit perfectly: http://cgi.ebay.com/New-Paintball-Co2-t ... 4151a12e9b
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Unread postAuthor: wyz2285 » Wed Jul 27, 2011 6:16 am

I can find these valves, but that´s a pin valve, not a ball valve, I can´t use it
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 27, 2011 6:26 am

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Unread postAuthor: wyz2285 » Wed Jul 27, 2011 7:07 am

Thanks jack!! :D
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