CO2 almost finished?

CO2 almost finished?

Post by Sheherya » Sun, 11 Feb 2007 00:37:49



Hi
Today I noticed that the low pressure guage dropped from 13 psi to 11
psi -- I tried to raise it but it did not work -- no amount of turning
the***did the trick.  I replaced the tank with my 5 lb tank and it
worked fine (increasing the pressure) -- is my 20 lb tank empty or
close to empty?
 
 
 

CO2 almost finished?

Post by Joe » Sun, 11 Feb 2007 00:41:51


Quote:

>Today I noticed that the low pressure guage dropped from 13 psi to 11
>psi -- I tried to raise it but it did not work -- no amount of turning
>the***did the trick.  I replaced the tank with my 5 lb tank and it
>worked fine (increasing the pressure) -- is my 20 lb tank empty or
>close to empty?

   It sounds likely.
--
Joel Plutchak          "Ignorance more frequently begets confidence
. at VERYWARMmail.com   than does knowledge." - Charles Darwin

 
 
 

CO2 almost finished?

Post by John 'Shaggy' Kolesa » Sun, 11 Feb 2007 00:44:46



Quote:
> Hi
> Today I noticed that the low pressure guage dropped from 13 psi to 11
> psi -- I tried to raise it but it did not work -- no amount of turning
> the***did the trick.  I replaced the tank with my 5 lb tank and it
> worked fine (increasing the pressure) -- is my 20 lb tank empty or
> close to empty?

Sounds like it.  Is it a lot lighter than when it was full?

John.

 
 
 

CO2 almost finished?

Post by Dan Logche » Sun, 11 Feb 2007 02:14:43


Quote:


>>Hi
>>Today I noticed that the low pressure guage dropped from 13 psi to 11
>>psi -- I tried to raise it but it did not work -- no amount of turning
>>the***did the trick.  I replaced the tank with my 5 lb tank and it
>>worked fine (increasing the pressure) -- is my 20 lb tank empty or
>>close to empty?

> Sounds like it.  Is it a lot lighter than when it was full?

I should remember to weight it empty before I fill it next time..
What I do is give it a nudge and see if it rocks a bit from the
liquid sloshing around.

--
Dan

 
 
 

CO2 almost finished?

Post by John 'Shaggy' Kolesa » Sun, 11 Feb 2007 03:27:31


Quote:



>>>Hi
>>>Today I noticed that the low pressure guage dropped from 13 psi to 11
>>>psi -- I tried to raise it but it did not work -- no amount of turning
>>>the***did the trick.  I replaced the tank with my 5 lb tank and it
>>>worked fine (increasing the pressure) -- is my 20 lb tank empty or
>>>close to empty?

>> Sounds like it.  Is it a lot lighter than when it was full?

> I should remember to weight it empty before I fill it next time..
> What I do is give it a nudge and see if it rocks a bit from the
> liquid sloshing around.

A lot of tanks will have the tare weight stamped on the side somewhere, which
is the weight of the empty tank.

John.

 
 
 

CO2 almost finished?

Post by jaso » Sun, 11 Feb 2007 11:34:02


Quote:



>>> Hi
>>> Today I noticed that the low pressure guage dropped from 13 psi to 11
>>> psi -- I tried to raise it but it did not work -- no amount of turning
>>> the***did the trick.  I replaced the tank with my 5 lb tank and it
>>> worked fine (increasing the pressure) -- is my 20 lb tank empty or
>>> close to empty?

>> Sounds like it.  Is it a lot lighter than when it was full?

> I should remember to weight it empty before I fill it next time..
> What I do is give it a nudge and see if it rocks a bit from the
> liquid sloshing around.

Good idea but lets be honest we all move that tank often enough to know
the weight by heart so we should be able to tell when it's getting low.
 
 
 

CO2 almost finished?

Post by Dan Logche » Sun, 11 Feb 2007 12:15:36


Quote:




>>>> Hi
>>>> Today I noticed that the low pressure guage dropped from 13 psi to 11
>>>> psi -- I tried to raise it but it did not work -- no amount of turning
>>>> the***did the trick.  I replaced the tank with my 5 lb tank and it
>>>> worked fine (increasing the pressure) -- is my 20 lb tank empty or
>>>> close to empty?

>>> Sounds like it.  Is it a lot lighter than when it was full?

>> I should remember to weight it empty before I fill it next time..
>> What I do is give it a nudge and see if it rocks a bit from the
>> liquid sloshing around.

> Good idea but lets be honest we all move that tank often enough to know
> the weight by heart so we should be able to tell when it's getting low.

The 5# yes, the 20# no.  It sits in the same spot with space on either side
for a keg to carbonate.  I've filled it once in 6 months and its still got
plenty of liquid in it.

--
Dan

 
 
 

CO2 almost finished?

Post by Scott Alft » Mon, 12 Feb 2007 15:37:17



Quote:

>Hi
>Today I noticed that the low pressure guage dropped from 13 psi to 11
>psi -- I tried to raise it but it did not work -- no amount of turning
>the***did the trick.  I replaced the tank with my 5 lb tank and it
>worked fine (increasing the pressure) -- is my 20 lb tank empty or
>close to empty?

What does your high-pressure gauge say?  If it's started going below 800
psi, the liquid carbon dioxide is gone and you're literally "running on
fumes."  Once it starts, it won't take long for it to go down to zero.

  _/_
 / v \ Scott Alfter (remove the obvious to send mail)
(IIGS( http://www.FoundCollection.com/;          Top-posting!
 \_^_/ rm -rf /bin/laden            >What's the most annoying thing on Usenet?

 
 
 

CO2 almost finished?

Post by Don Leve » Wed, 14 Feb 2007 04:08:12


Quote:



> >Hi
> >Today I noticed that the low pressure guage dropped from 13 psi to 11
> >psi -- I tried to raise it but it did not work -- no amount of turning
> >the***did the trick.  I replaced the tank with my 5 lb tank and it
> >worked fine (increasing the pressure) -- is my 20 lb tank empty or
> >close to empty?

> What does your high-pressure gauge say?  If it's started going below 800
> psi, the liquid carbon dioxide is gone and you're literally "running on
> fumes."  Once it starts, it won't take long for it to go down to zero.

With one proviso: that the tank is at about 68F.  My tanks are, at the
moment, in a 35F garage.  The pressure is at about 600 psi if not
less, and have plenty of liquid left.  When I bring them inside and
they equilibriate to room temp, the pressure rises (remember Boyle's
Law, IIRC).

--
Don Levey                                                    $ cd /pub
Framingham, MA                                               $ more beer

will be used to tune the blocking lists.  

 
 
 

CO2 almost finished?

Post by Sheherya » Wed, 14 Feb 2007 23:54:27


Both my tanks are showing around 400 psi at 70F.  THe 20 lb tank was
at this point from the begining.  I unfortunately do not have a
scale......does this mean it was close to empty to start with?
 
 
 

CO2 almost finished?

Post by Dan Logche » Thu, 15 Feb 2007 00:10:07


Quote:

> Both my tanks are showing around 400 psi at 70F.  THe 20 lb tank was
> at this point from the begining.  I unfortunately do not have a
> scale......does this mean it was close to empty to start with?

Did you get it full or have it filled?  Who's to know otherwise.
You will see the high pressure side start to drop as the tank
gets close to empty.  If you have been at 400 PSI for a while, I'd
say you're not empty yet.

--
Dan

 
 
 

CO2 almost finished?

Post by Ranger Stev » Thu, 15 Feb 2007 02:13:54



Quote:

> > Both my tanks are showing around 400 psi at 70F.  THe 20 lb tank was
> > at this point from the begining.  I unfortunately do not have a
> > scale......does this mean it was close to empty to start with?

> Did you get it full or have it filled?  Who's to know otherwise.
> You will see the high pressure side start to drop as the tank
> gets close to empty.  If you have been at 400 PSI for a while, I'd
> say you're not empty yet.

> --
> Dan

I get mine filled at a local fire extinguisher repair shop.   The
owner told me that the only reliable gauge for full/empty on a CO2
tank is weight.   He explained the process (which I didn't fully
understand) but the gauge on the regulator that reads tank pressure
(i.e. 600 lbs.) doesn't give you much more than a guestimate on how
much gas is remaining.  Once the liquid in the tank is all turned to
gas is when it'll drop into the red zone on the gauge.  At that point,
you have very little CO2 left and may only have enough pressure left
to deliver a few more pints.

Talking about temperature though - I remember when I first started
kegging.   I had just dropped a bunch of money on the tank, keg, tap,
lines, regulator, etc. and had it all hooked up and my first batch in
the keg.  I put the whole thing in the fridge, set the pressure to 15
lbs. or whatever and went to bed.   In the morning when I checked the
pressure had dropped from 800 lbs on the tank to 600.  I was bummed
out thinking that I had a leak somewhere and had lost most of the gas
in my brand new tank.

I took everything out and started spraying every connection with soapy
water to find the leak.   Nothing!  Then I noticed that the pressure
had gone back up.   Suddenly I flashed back to high school physics and
remembered that whole temperature/pressure thing.   Duh!

 
 
 

CO2 almost finished?

Post by Bob » Thu, 15 Feb 2007 12:31:24



Quote:
> Both my tanks are showing around 400 psi at 70F.  THe 20 lb tank was
> at this point from the begining.  I unfortunately do not have a
> scale......does this mean it was close to empty to start with?

400 sounds pretty low for 70F, suggesting the are near empty.
The guages could be inaccurate though. If the pressure drops
with use, you will know for sure.

Bob

 
 
 

CO2 almost finished?

Post by John 'Shaggy' Kolesa » Sat, 17 Feb 2007 01:39:46



Quote:
> Both my tanks are showing around 400 psi at 70F.  THe 20 lb tank was
> at this point from the begining.  I unfortunately do not have a
> scale......does this mean it was close to empty to start with?

No, probably means you have a broken gauge.  ;)

John.

 
 
 

CO2 almost finished?

Post by John 'Shaggy' Kolesa » Sat, 17 Feb 2007 01:41:26



Quote:
> I get mine filled at a local fire extinguisher repair shop.   The
> owner told me that the only reliable gauge for full/empty on a CO2
> tank is weight.   He explained the process (which I didn't fully
> understand) but the gauge on the regulator that reads tank pressure
> (i.e. 600 lbs.) doesn't give you much more than a guestimate on how
> much gas is remaining.  Once the liquid in the tank is all turned to
> gas is when it'll drop into the red zone on the gauge.  At that point,
> you have very little CO2 left and may only have enough pressure left
> to deliver a few more pints.

I usually tell people the same thing.  IMO, a high pressure gauge is
fairly useless.

John.