How many empty 5lb kegs can a 5lb CO2 tank fill?

[SFrazeur]

How many empty 5lb kegs can a 5lb CO2 tank fill?

How many cubic feet of gas will fit into 5lb kegs?

 

[Transamguy77]

I don't understand your question, why are you wanting to fill empty kegs?

 

[SFrazeur]

I want to use kegs as pressure vessels to pressurize balls. I've tried to find the information myself but I cannot find it. Otherwise I would not bother brewers.

 

[Spyderbyte07]

What pressure? (And temperature?)

 

[Horseflesh]

5 gal kegs you mean? About 64 kegs--full but unpressurized.

http://www.airproducts.com/products...ht-and-volume-equivalents/carbon-dioxide.aspx

5 lb gas is about 43 cu ft at 70F, which is 321 gallons, or about 64 5 gal kegs.

If the kegs are pressurized, obviously you'll fill fewer.

 

[beernutz]

I want to use kegs as pressure vessels to pressurize balls. I've tried to find the information myself but I cannot find it. Otherwise I would not bother brewers.

Tennis balls? I do this in a Corny keg for my ball machine but I don't use C02, I just pump air into them with a tire inflator.

 

[k1ngl1ves]

I want to use kegs as pressure vessels to pressurize balls. I've tried to find the information myself but I cannot find it. Otherwise I would not bother brewers.

You gotta have a lot of balls to come here and ask these questions.

 

[SFrazeur]

Tennis balls? I do this in a Corny keg for my ball machine but I don't use C02, I just pump air into them with a tire inflator.

That is correct. I am a Tennis instructor. I have 4 kegs that I use. CO2 is faster as the molecule is smaller. But the down side is that it also defuses out faster. I could not get plain air to inflate / infuse in any reasonable time.

 

[SFrazeur]

What pressure? (And temperature?)

5 gal kegs you mean? About 64 kegs--full but unpressurized.

http://www.airproducts.com/products...ht-and-volume-equivalents/carbon-dioxide.aspx

5 lb gas is about 43 cu ft at 70F, which is 321 gallons, or about 64 5 gal kegs.

If the kegs are pressurized, obviously you'll fill fewer.

Yes. 5 Gal. Temperature is 75F and I pressurize to 50PSI.

 

[beernutz]

That is correct. I am a Tennis instructor. I have 4 kegs that I use. CO2 is faster as the molecule is smaller. But the down side is that it also defuses out faster. I could not get plain air to inflate / infuse in any reasonable time.

I would have guessed just the opposite: that the molecules that primarily make up air, N2 and 02, are both smaller than a CO2 molecule. I agree that if I use only 14 psi of air the balls take a very long time to become playable again. I have found that about 35 psi for about a week will return them to playability. Since I don't use my machine that often waiting a week isn't a problem.

How long do you leave yours under pressure at 50 psi before they are playable?

The biggest pita with my setup is getting the balls into and out of my Corny keg.

 

[Gnomebrewer]

At 50psi and 75F, CO2 has a density of about 6.3Kg per cubic meter.
http://www.peacesoftware.de/einigewerte/calc_co2.php5

Therefore, for a 2.27Kg (5lb) cylinder, the CO2 will occupy 2.27/6.3=0.36 cubic meters, or 360litres, or 95 gallons, or about 19 kegs.

 

[SFrazeur]

I would have guessed just the opposite: that the molecules that primarily make up air, N2 and 02, are both smaller than a CO2 molecule. I agree that if I use only 14 psi of air the balls take a very long time to become playable again. I have found that about 35 psi for about a week will return them to playability. Since I don't use my machine that often waiting a week isn't a problem.

How long do you leave yours under pressure at 50 psi before they are playable?

The biggest pita with my setup is getting the balls into and out of my Corny keg.

50 PSI for approximately 3 days

 

[beernutz]

50 PSI for approximately 3 days

You might consider looking on craigslist for a used 20# or larger CO2 tank because in the long run the gas will be a lot cheaper to buy and you won't have to exchange as frequently.

I bought a full used 20 lb tank for $55 on craigslist which cost just over half of what I paid for my older empty 5# tank 15 years ago. At the gas place I go to for refills or exchanges it cost $10 for a 5# tank and $17 for a 20# tank. You get 300% more gas for only 70% more money with a 20# tank.