CO2 psi #'s

[xcmountain80]

I recently purchased a powertank 10lb. and found the 1st fill only registered 1100psi. What gives the regulator read out goes to a full 3500psi, this is a luxfer tank designed the same as my AL dive tanks just different threading for valves. I understand CO2 is a liquid compressed correct? Is that why it is more dense than my 3500 PSI air tank? Yes yes liquid more dense than gas I get it that would explain why the tank cannot be used with it on it's side. As liquids and the valve they use won't pickup the liquid. Anyhow whats the usual psi for a new fill on a CO2 tank.

Aaron

 

[450 DUDE]

Sounds bout right, btw when you compress co2 (gas) it goes into a liquid state.
The fill is according to weight and weight alone. the pressure reading on the gauge is just the pressure of the head gas ( NOT a reliable measurement of volume)

hth

ken

 

[Chris85xlt]

around 1000psi is about right. weight the empty tank and again when its full. should be around 10lbs for a 10lb tank

3500psi would be dangerous.

 

[Layonnn]

Sounds bout right bty when you compress co2 (gas) it goes into a liquid state.
The fill is according to weight and weight alone. the pressure reading on the gauge is just the pressure of the head gas ( NOT a reliable measurement of volume)

hth

ken

x2, the gas inside the bottle is mostly liquid with just the top being gas. This is the reason any time you discharge/use the tank it should be vertical.

 

[slooowr6]

You have to go by weight with CO2. It'll be around 900PSI - 1100PSI depends on the air temperature. Most of the CO2 stored in the bottle is in liquid form.

 

[xcmountain80]

around 1000psi is about right. weight the empty tank and again when its full. should be around 10lbs for a 10lb tank

3500psi would be dangerous.

Why?

 

[xcmountain80]

sounds bout right, btw when you compress co2 (gas) it goes into a liquid state.
The fill is according to weight and weight alone. The pressure reading on the gauge is just the pressure of the head gas ( not a reliable measurement of volume)

hth

ken

10-4


Aaron

 

[Chris85xlt]

Why?

I think i was reading on Powertanks old web site a long time ago where they talked about the difference between using a scuba tank and their CO2 tank.
it was something, something, valve getting severed off and the 3500psi tank has enough pressure for lift off. i tried looking for again but couldnt find it.

ive had my 10lb Powertank for the last 5 years. great product! it is due for its hydrostatic test though

 

[spressomon]

The gauge they use is also used for nitrogen...which gets charged to around 3,000psi I believe.

 

[xcmountain80]

I think i was reading on Powertanks old web site a long time ago where they talked about the difference between using a scuba tank and their CO2 tank.
it was something, something, valve getting severed off and the 3500psi tank has enough pressure for lift off. i tried looking for again but couldnt find it.

ive had my 10lb Powertank for the last 5 years. great product! it is due for its hydrostatic test though

Yeah while physics dictates this it's more of a scare tactic I presume. If a scuba tank is only compressed to 1000-1500 psi it would be the same pressure as a CO2 tank. And yes if the two were on there sides and you were able to knock off the valve on both the CO2 might feeze but it will still scare the ever loving crap out of you, the Scuba tank on the other hand might take off like a missle but at less than 1/2 it's charge (1500 psi) it will leak like a SOB. I have seen tanks flip end over end down the road and not break the darn valve off (traffic accident in the FL Keys). Scuba tank get filled to 3200-3500 when hot filled (fast) and cool a bit but maintain at least 3000-3200psi. Mythbuster also did a shoot at a tank episode where they tried to replicate the Jaws movie. The only time the tank ever exploded was when they attached C-4 to it. They shot it, they shot it again, yadayadayada. Dive tanks can also be mounted on their sides where the CO2's cannot due to the pickup tube (I guess) and the liquid CO2 much like propane less the flammable aspect. I'm wondering if my purchase was in vane now that I look at it. The tanks are manufactured by the same company that make my dive tank as there are few cylinder manufactures everything is the same other than the DOT stamp, I don't know if these (CO2) tanks require a visual every year but they are no different when it comes to hydro's. My dive tanks don't ever make it past there 2nd hydro.

Aaron

 

[xcmountain80]

The gauge they use is also used for nitrogen...which gets charged to around 3,000psi I believe.

Yes nitrogen shares similarities with breathable air as it makes up most of it but can be pressurized just the same as breathing air in a dive tank.

Aaron