Freezing a new CO2 tank before initial use ?
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i never heard of doing that. i didnt do it to mine. it gets pretty cold after you fill it anyways.
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140 Posts
Does this sound like a plausable concept?
"When tranfering liquid co2 from a donor bottle to your cylinder the donor bottle is siphoning liquid co2 which is always attemting to trafer in a gas. The thing that helps prevent this is temp. The colder the bottle the more liquid co2 it will accept. So basically to ensure you get a full fill your bottle should be as cold as possible."
"When tranfering liquid co2 from a donor bottle to your cylinder the donor bottle is siphoning liquid co2 which is always attemting to trafer in a gas. The thing that helps prevent this is temp. The colder the bottle the more liquid co2 it will accept. So basically to ensure you get a full fill your bottle should be as cold as possible."
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221 Posts
As long as you are buying by weight, it should not matter.
"As long as there is liquid in the tank, the pressure in a CO2 tank is determined ONLY by the temperature. At room temperature (70 degrees F) its about 853 psi."
I think your cooling thought comes from an old Indian trick in the paintball circles.
"As long as there is liquid in the tank, the pressure in a CO2 tank is determined ONLY by the temperature. At room temperature (70 degrees F) its about 853 psi."
I think your cooling thought comes from an old Indian trick in the paintball circles.
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221 Posts
Be really careful about the possibility of getting liquid into your regulator, they go south after that.
Weigh the tank under each circumstance, I'm curious as to the actual gain from this.
Weigh the tank under each circumstance, I'm curious as to the actual gain from this.
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221 Posts
Yes, but an "over full" bottle could present the possibility of liquid CO2 entering the regulator rather than gas. Same issue applies for not turning the bottle on its side while in operation.
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I asked the guys at the welding shop about this. They said they had never heard of it. They said it doesn't make sense.
I began to think that the CO2 is liquid and is very COLD. As it hits my tank the tank begins to get VERY cold. When I get my little paint ball tank back it feels cold. It only tanks a matter of minutes for them to fill the paint ball tank. SO... when the CO2 hits the metal it will automatically freeze the tank if it stays a liquid. It can freeze the tank much quicker and efficiently than anything I can do. Doesn't it make sense that this happens when it's filled anyway? ... just my rambling thoughts....
I began to think that the CO2 is liquid and is very COLD. As it hits my tank the tank begins to get VERY cold. When I get my little paint ball tank back it feels cold. It only tanks a matter of minutes for them to fill the paint ball tank. SO... when the CO2 hits the metal it will automatically freeze the tank if it stays a liquid. It can freeze the tank much quicker and efficiently than anything I can do. Doesn't it make sense that this happens when it's filled anyway? ... just my rambling thoughts....
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2,096 Posts
Are we talking paintball cannisters or the larger CO2 containers?
If it's the latter then I would be concerned that an aquarium shop is filling them "to hold double what it's supposed to carry in on of the larger tanks. As others mentioned before, it should be sold by weight in those circumstances.
If it's a paintball cannister, I'd still be a little bit wary about trying to overfill it.....like others mentioned you can run into problems if liquid CO2 starts going into your regulator....
If it's the latter then I would be concerned that an aquarium shop is filling them "to hold double what it's supposed to carry in on of the larger tanks. As others mentioned before, it should be sold by weight in those circumstances.
If it's a paintball cannister, I'd still be a little bit wary about trying to overfill it.....like others mentioned you can run into problems if liquid CO2 starts going into your regulator....
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I have read many a story of people having their tanks overfilled. When the CO2 warms, it increased in preasure and can blow the tanks pressure relief valve. Depending on the type of valve, it can completely empty the tank, or close again once the correct pressure is reached. At any rate, you will have a dry cleaning bill for your pants
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I've heard you get more by having a tank cooled before filling. Also you should not put a regulator back on until the tank is at room temperature.
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140 Posts
Pretty sure it only applies to smaller tanks, paint ball sized.
I guess if its cooler then more liquid can fit in before it turns into a gas due to tank temp?
Well i dont know, I was just told this by 2 different people, so must have some validity behind it.
I guess if its cooler then more liquid can fit in before it turns into a gas due to tank temp?
Well i dont know, I was just told this by 2 different people, so must have some validity behind it.
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4,332 Posts
From a scientific point of view, you should get 5 pounds of CO2. There is a tare weight stamped on each cylinder and the person filling it should keep filling until there is 5 lb inside.
The temperature of the CO2 in the cylinder will start off identical to the temperature of the surrounding environment. When CO2 transitions from liquid to gas (vaporizes), energy is required and the temperature will drop. When CO2 is converted from gas to liquid (using a compressor), energy is added and the temperature will rise. This process explains how an air-conditioner works.
The pressure inside a CO2 tank will depend on a few things. I initially thought it only depended on the temperature, but like so many other things, it's a bit more complex than that:
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The temperature of the CO2 in the cylinder will start off identical to the temperature of the surrounding environment. When CO2 transitions from liquid to gas (vaporizes), energy is required and the temperature will drop. When CO2 is converted from gas to liquid (using a compressor), energy is added and the temperature will rise. This process explains how an air-conditioner works.
The pressure inside a CO2 tank will depend on a few things. I initially thought it only depended on the temperature, but like so many other things, it's a bit more complex than that:
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1,403 Posts
That guy was crazy, This is how myths in the aquatic community get started.
"Cu is the last ingredient in the food I just fed my shrimp, OH NOOOOO"
"Excess Nitrate causes algea"
On and on it goes.
Dont freeze your tank.
OR better yet weigh it after its filled frozen and not frozen and be the judge yourself.
"Cu is the last ingredient in the food I just fed my shrimp, OH NOOOOO"
"Excess Nitrate causes algea"
On and on it goes.
Dont freeze your tank.
OR better yet weigh it after its filled frozen and not frozen and be the judge yourself.
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