How to fill liquid co2

[C85D4x4]

I went to the back storage cage at work the other day where we store all the large nitrogen cylinders to swap out a empty one. Well amongst them all I found 1 in the back with co2. I went to asked around and I come to find out that it’s been sitting there for months now, and no one is going to use it.

I was just going to use a regular high pressure regulator to make the transfer to my 10lb for the jeep. But then I started thinking, how do I transfer the liquid Co2 in the cylinder?

Does anyone know the right way of doing this? Wouldn’t using a regulator just transfer the gas and not the liquid?

Thanks
Chris

 

[pb_beaker]

IIRC the cylinder has a tube to the bottom so it only lets liquid out. Try holding it upside down then use your reg. :looney:

 

[98XJSport]

Gotta start off by saying filling any pressurized tank like this can be very very dangerous if you don't know what you are doing!

Now that that is out of the way, when I would fill paintball tanks the fill tank had to be a siphon tank, or tipped upside down. All my tanks were to large to tip. Then we would connect a fill adaptor to the bulk tank (on/off valve) to a Y fitting with another on/off for purging. Other end of the Y went to the appropriate type hose, to an adaptor on the smaller tank to be filled.

Filling procedure was as follows:

Purge all CO2 out of tank to be filled (This chills the tank, making sure you get a proper fill)
Place tank on a scale and zero it (watch for frost bite!)
With purge valve closed, open fill valve. Tape down hair on back of neck when the tank starts squealing and expanding.

We would fill 12 ounce tanks most of the time. Usually you would get ~6 ounces the first time. Then you would purge again, about half. Then fill again. Repeat until you get "full". I fill tanks 2 ounces shy to make sure the equipment wasn't picking up liquid.

Wasteful? Yes. But the only way to do it without investing in a compressor driven pump. Which we did, worked well.

Good luck, and be careful!

 

[C85D4x4]

IIRC the cylinder has a tube to the bottom so it only lets liquid out. Try holding it upside down then use your reg. :looney:

Holding it upside down...........first off these tanks are big! (1000lb I think)........second that’s not safe......

But thanks ill have to find out if it has that tube I didn’t know that.

Gotta start off by saying filling any pressurized tank like this can be very very dangerous if you don't know what you are doing!

Now that that is out of the way, when I would fill paintball tanks the fill tank had to be a siphon tank, or tipped upside down. All my tanks were to large to tip. Then we would connect a fill adaptor to the bulk tank (on/off valve) to a Y fitting with another on/off for purging. Other end of the Y went to the appropriate type hose, to an adaptor on the smaller tank to be filled.

Filling procedure was as follows:

Purge all CO2 out of tank to be filled (This chills the tank, making sure you get a proper fill)
Place tank on a scale and zero it (watch for frost bite!)
With purge valve closed, open fill valve. Tape down hair on back of neck when the tank starts squealing and expanding.

We would fill 12 ounce tanks most of the time. Usually you would get ~6 ounces the first time. Then you would purge again, about half. Then fill again. Repeat until you get "full". I fill tanks 2 ounces shy to make sure the equipment wasn't picking up liquid.

Wasteful? Yes. But the only way to do it without investing in a compressor driven pump. Which we did, worked well.

Good luck, and be careful!

Wow......squealing and expanding

Well I really wouldn’t just want to use a on/off valve..........I really don’t find it safe to unload the pressure from the big tank strait to my 10lb........I will be using a regulator if im doing this. But I do thank you for the way of filling it

 

[98XJSport]

Size of the tank of a liquified gas doesn't dictate pressure, just the amount of liquid.