New CO2 tank pressure

[Spyder2x]

I just got my first CO2 tank today. A friend of mine who works at Pepsi
gave me a 25 pound tank that he said was full. When I plugged in my
regulator that has been sitting here for days it barely went up 1/4 of the
gauge to stop around 750 PSI. My question is, Should I go have this tank
filled? Or is it already full, and 750 PSI is normal?
Thanks for any help.
--Jim--

[Bob Alston]

Spyder2x wrote:
> I just got my first CO2 tank today. A friend of mine who works at Pepsi
> gave me a 25 pound tank that he said was full. When I plugged in my
> regulator that has been sitting here for days it barely went up 1/4 of the
> gauge to stop around 750 PSI. My question is, Should I go have this tank
> filled? Or is it already full, and 750 PSI is normal?
> Thanks for any help.
> --Jim--
>
>
Wait 24 hours. May take some time for the temperature to rise in the
tank to room temp. Should be approx 850 lbs at room temp.

Bob

[Spyder2x]

"Bob Alston" > wrote in message
news:EqVnd.58497$_g6.36130@okepread03...
> Spyder2x wrote:
>> I just got my first CO2 tank today. A friend of mine who works at Pepsi
>> gave me a 25 pound tank that he said was full. When I plugged in my
>> regulator that has been sitting here for days it barely went up 1/4 of
>> the gauge to stop around 750 PSI. My question is, Should I go have this
>> tank filled? Or is it already full, and 750 PSI is normal?
>> Thanks for any help.
>> --Jim--
>>
>>
> Wait 24 hours. May take some time for the temperature to rise in the tank
> to room temp. Should be approx 850 lbs at room temp.
>
> Bob

Thanks Bob,
I just checked it again and it is around the 800 mark. It's kinda hard to
tell exactly, but I had expected to peg the regulator near the max...Guess I
learned something today, I suspect there will be a lot of learning in the
weeks ahead. :-)
Thanks again,
--Jim--

[Scott Rogahn]

CO2 becomes a liquid at about 800 psi. At less then 800 psi the liquid will
boil off until the pressure in the bottle reaches 800. So as long as there
is liquid in the bottle the pressure will read 800. Regardless of weather
the bottle has just a little liquid CO2 or is completely full. You can tell
how full the bottle is by weighing it. Off course you will need to know the
empty weight first.

Also don't get the bottle filled until empty (something lees than 800 , like
maybe 500 psi) because they will likely charge you for 25 pounds of CO2 no
mater what it actually took to fill it. Or so it goes with 5 pound bottles
filled at the liquor store. 25s may be handled differently

Scott


"Spyder2x" > wrote in message
news:iA2od.161801$hj.114027@fed1read07...
>
> "Bob Alston" > wrote in message
> news:EqVnd.58497$_g6.36130@okepread03...
>> Spyder2x wrote:
>>> I just got my first CO2 tank today. A friend of mine who works at Pepsi
>>> gave me a 25 pound tank that he said was full. When I plugged in my
>>> regulator that has been sitting here for days it barely went up 1/4 of
>>> the gauge to stop around 750 PSI. My question is, Should I go have this
>>> tank filled? Or is it already full, and 750 PSI is normal?
>>> Thanks for any help.
>>> --Jim--
>>>
>>>
>> Wait 24 hours. May take some time for the temperature to rise in the
>> tank to room temp. Should be approx 850 lbs at room temp.
>>
>> Bob
>
> Thanks Bob,
> I just checked it again and it is around the 800 mark. It's kinda hard to
> tell exactly, but I had expected to peg the regulator near the max...Guess
> I learned something today, I suspect there will be a lot of learning in
> the weeks ahead. :-)
> Thanks again,
> --Jim--
>
>

[Michi Henning]

"Scott Rogahn" > wrote in message
...
> CO2 becomes a liquid at about 800 psi. At less then 800 psi the liquid will
> boil off until the pressure in the bottle reaches 800. So as long as there
> is liquid in the bottle the pressure will read 800. Regardless of weather
> the bottle has just a little liquid CO2 or is completely full. You can tell
> how full the bottle is by weighing it. Off course you will need to know the
> empty weight first.

The tare weight (empty weight) is normally stamped on the cylinder, so
you can find out fairly easily how much CO2 is left by weighing the
cylinder. (The tare weight doesn't include the weight of the regulator,
but you can adjust for that at least roughly.)

Cheers,

Michi.

--
Michi Henning Ph: +61 4 1118-2700
ZeroC, Inc. http://www.zeroc.com