CO2 Vs. Scuba tank?
 

I already have a 40 ft^2 oxy cyl I can use for compressed air for tire
filling. I've been reading sites about CO2 tanks, they hold 800 Psi, and and
a scuba/air tank hold 2-3000 Psi.
Does anyone know for sure how same-size tanks compare in fill-up counts?

--
Paul Calman, Hathaway Pines, California

Re: CO2 Vs. Scuba tank?
 

This is basic physics. Ever hear of the ideal gas law? If your tank size
and temperature are the same, then the amount of gas in the tank is directly
proportional to the pressure. Double the pressure, double the amount of
gas, and (approximately) double the use for any particular application. (I
say approximately because you can't really get all the gas out. If you
require 30 psi pressure for your application, for example, the last 30 psi
in the tank is useless.)

Earle

"Paul Calman" <spam@trap.com> wrote in message
news:bqtrp1$26c0rf$1@ID-87669.news.uni-berlin.de...
> I already have a 40 ft^2 oxy cyl I can use for compressed air for tire
> filling. I've been reading sites about CO2 tanks, they hold 800 Psi, and
and
> a scuba/air tank hold 2-3000 Psi.
> Does anyone know for sure how same-size tanks compare in fill-up counts?
>
> --
> Paul Calman, Hathaway Pines, California
>
>

Re: CO2 Vs. Scuba tank?
 

This is basic physics. Ever hear of the ideal gas law? If your tank size
and temperature are the same, then the amount of gas in the tank is directly
proportional to the pressure. Double the pressure, double the amount of
gas, and (approximately) double the use for any particular application. (I
say approximately because you can't really get all the gas out. If you
require 30 psi pressure for your application, for example, the last 30 psi
in the tank is useless.)

Earle

"Paul Calman" <spam@trap.com> wrote in message
news:bqtrp1$26c0rf$1@ID-87669.news.uni-berlin.de...
> I already have a 40 ft^2 oxy cyl I can use for compressed air for tire
> filling. I've been reading sites about CO2 tanks, they hold 800 Psi, and
and
> a scuba/air tank hold 2-3000 Psi.
> Does anyone know for sure how same-size tanks compare in fill-up counts?
>
> --
> Paul Calman, Hathaway Pines, California
>
>

Re: CO2 Vs. Scuba tank?
 

This is basic physics. Ever hear of the ideal gas law? If your tank size
and temperature are the same, then the amount of gas in the tank is directly
proportional to the pressure. Double the pressure, double the amount of
gas, and (approximately) double the use for any particular application. (I
say approximately because you can't really get all the gas out. If you
require 30 psi pressure for your application, for example, the last 30 psi
in the tank is useless.)

Earle

"Paul Calman" <spam@trap.com> wrote in message
news:bqtrp1$26c0rf$1@ID-87669.news.uni-berlin.de...
> I already have a 40 ft^2 oxy cyl I can use for compressed air for tire
> filling. I've been reading sites about CO2 tanks, they hold 800 Psi, and
and
> a scuba/air tank hold 2-3000 Psi.
> Does anyone know for sure how same-size tanks compare in fill-up counts?
>
> --
> Paul Calman, Hathaway Pines, California
>
>

Re: CO2 Vs. Scuba tank?
 

That's where it gets wierd. one company is saying they get 84 Ft^2 out of a
cylinder the same size as a 40 Ft^2 O2 cyl, because it's CO2 in a liquid
state.
That's what I'm trying to figure, is a tank under 2000 PSI going to actually
deliver only 40 Ft^2 when an 800 Psi tank of CO2 will deliver 84 ? The
sites of CO2 tank makers only compare with a 150 Psi air tank, not a scuba
cyl.

--
Paul Calman, Hathaway Pines, California
"Earle Horton" <enfermero_diabolico@registerednurses.com> wrote in message
news:bqtt76$25oihf$1@ID-147790.news.uni-berlin.de...
> This is basic physics. Ever hear of the ideal gas law? If your tank size
> and temperature are the same, then the amount of gas in the tank is
directly
> proportional to the pressure. Double the pressure, double the amount of
> gas, and (approximately) double the use for any particular application.
(I
> say approximately because you can't really get all the gas out. If you
> require 30 psi pressure for your application, for example, the last 30 psi
> in the tank is useless.)
>
> Earle
>
> "Paul Calman" <spam@trap.com> wrote in message
> news:bqtrp1$26c0rf$1@ID-87669.news.uni-berlin.de...
> > I already have a 40 ft^2 oxy cyl I can use for compressed air for tire
> > filling. I've been reading sites about CO2 tanks, they hold 800 Psi, and
> and
> > a scuba/air tank hold 2-3000 Psi.
> > Does anyone know for sure how same-size tanks compare in fill-up counts?
> >
> > --
> > Paul Calman, Hathaway Pines, California
> >
> >
>
>

Re: CO2 Vs. Scuba tank?
 

That's where it gets wierd. one company is saying they get 84 Ft^2 out of a
cylinder the same size as a 40 Ft^2 O2 cyl, because it's CO2 in a liquid
state.
That's what I'm trying to figure, is a tank under 2000 PSI going to actually
deliver only 40 Ft^2 when an 800 Psi tank of CO2 will deliver 84 ? The
sites of CO2 tank makers only compare with a 150 Psi air tank, not a scuba
cyl.

--
Paul Calman, Hathaway Pines, California
"Earle Horton" <enfermero_diabolico@registerednurses.com> wrote in message
news:bqtt76$25oihf$1@ID-147790.news.uni-berlin.de...
> This is basic physics. Ever hear of the ideal gas law? If your tank size
> and temperature are the same, then the amount of gas in the tank is
directly
> proportional to the pressure. Double the pressure, double the amount of
> gas, and (approximately) double the use for any particular application.
(I
> say approximately because you can't really get all the gas out. If you
> require 30 psi pressure for your application, for example, the last 30 psi
> in the tank is useless.)
>
> Earle
>
> "Paul Calman" <spam@trap.com> wrote in message
> news:bqtrp1$26c0rf$1@ID-87669.news.uni-berlin.de...
> > I already have a 40 ft^2 oxy cyl I can use for compressed air for tire
> > filling. I've been reading sites about CO2 tanks, they hold 800 Psi, and
> and
> > a scuba/air tank hold 2-3000 Psi.
> > Does anyone know for sure how same-size tanks compare in fill-up counts?
> >
> > --
> > Paul Calman, Hathaway Pines, California
> >
> >
>
>

Re: CO2 Vs. Scuba tank?
 

That's where it gets wierd. one company is saying they get 84 Ft^2 out of a
cylinder the same size as a 40 Ft^2 O2 cyl, because it's CO2 in a liquid
state.
That's what I'm trying to figure, is a tank under 2000 PSI going to actually
deliver only 40 Ft^2 when an 800 Psi tank of CO2 will deliver 84 ? The
sites of CO2 tank makers only compare with a 150 Psi air tank, not a scuba
cyl.

--
Paul Calman, Hathaway Pines, California
"Earle Horton" <enfermero_diabolico@registerednurses.com> wrote in message
news:bqtt76$25oihf$1@ID-147790.news.uni-berlin.de...
> This is basic physics. Ever hear of the ideal gas law? If your tank size
> and temperature are the same, then the amount of gas in the tank is
directly
> proportional to the pressure. Double the pressure, double the amount of
> gas, and (approximately) double the use for any particular application.
(I
> say approximately because you can't really get all the gas out. If you
> require 30 psi pressure for your application, for example, the last 30 psi
> in the tank is useless.)
>
> Earle
>
> "Paul Calman" <spam@trap.com> wrote in message
> news:bqtrp1$26c0rf$1@ID-87669.news.uni-berlin.de...
> > I already have a 40 ft^2 oxy cyl I can use for compressed air for tire
> > filling. I've been reading sites about CO2 tanks, they hold 800 Psi, and
> and
> > a scuba/air tank hold 2-3000 Psi.
> > Does anyone know for sure how same-size tanks compare in fill-up counts?
> >
> > --
> > Paul Calman, Hathaway Pines, California
> >
> >
>
>

Re: CO2 Vs. Scuba tank?
 

I don't know off hand whether CO2 enters a liquid state at room temperature
and sufficient pressure, but I just got off the phone with my daughter who
is a master's student in chemistry and she says it probably does. (She gave
me a hard time too, like I should remember the physical characteristics of
CO2 just because I have a physics degree.) If it goes liquid of course the
ideal gas law doesn't apply and what the CO2 dealer is telling you is
probably true. In that case go with the CO2. Note that this stuff is also
dry and inert and has a lot of advantages over air because of that.

Earle

"Paul Calman" <spam@trap.com> wrote in message
news:bqtu08$26rh17$1@ID-87669.news.uni-berlin.de...
> That's where it gets wierd. one company is saying they get 84 Ft^2 out of
a
> cylinder the same size as a 40 Ft^2 O2 cyl, because it's CO2 in a liquid
> state.
> That's what I'm trying to figure, is a tank under 2000 PSI going to
actually
> deliver only 40 Ft^2 when an 800 Psi tank of CO2 will deliver 84 ? The
> sites of CO2 tank makers only compare with a 150 Psi air tank, not a scuba
> cyl.
>
> --
> Paul Calman, Hathaway Pines, California
> "Earle Horton" <enfermero_diabolico@registerednurses.com> wrote in message
> news:bqtt76$25oihf$1@ID-147790.news.uni-berlin.de...
> > This is basic physics. Ever hear of the ideal gas law? If your tank
size
> > and temperature are the same, then the amount of gas in the tank is
> directly
> > proportional to the pressure. Double the pressure, double the amount of
> > gas, and (approximately) double the use for any particular application.
> (I
> > say approximately because you can't really get all the gas out. If you
> > require 30 psi pressure for your application, for example, the last 30
psi
> > in the tank is useless.)
> >
> > Earle
> >
> > "Paul Calman" <spam@trap.com> wrote in message
> > news:bqtrp1$26c0rf$1@ID-87669.news.uni-berlin.de...
> > > I already have a 40 ft^2 oxy cyl I can use for compressed air for tire
> > > filling. I've been reading sites about CO2 tanks, they hold 800 Psi,
and
> > and
> > > a scuba/air tank hold 2-3000 Psi.
> > > Does anyone know for sure how same-size tanks compare in fill-up
counts?
> > >
> > > --
> > > Paul Calman, Hathaway Pines, California
> > >
> > >
> >
> >
>
>

Re: CO2 Vs. Scuba tank?
 

I don't know off hand whether CO2 enters a liquid state at room temperature
and sufficient pressure, but I just got off the phone with my daughter who
is a master's student in chemistry and she says it probably does. (She gave
me a hard time too, like I should remember the physical characteristics of
CO2 just because I have a physics degree.) If it goes liquid of course the
ideal gas law doesn't apply and what the CO2 dealer is telling you is
probably true. In that case go with the CO2. Note that this stuff is also
dry and inert and has a lot of advantages over air because of that.

Earle

"Paul Calman" <spam@trap.com> wrote in message
news:bqtu08$26rh17$1@ID-87669.news.uni-berlin.de...
> That's where it gets wierd. one company is saying they get 84 Ft^2 out of
a
> cylinder the same size as a 40 Ft^2 O2 cyl, because it's CO2 in a liquid
> state.
> That's what I'm trying to figure, is a tank under 2000 PSI going to
actually
> deliver only 40 Ft^2 when an 800 Psi tank of CO2 will deliver 84 ? The
> sites of CO2 tank makers only compare with a 150 Psi air tank, not a scuba
> cyl.
>
> --
> Paul Calman, Hathaway Pines, California
> "Earle Horton" <enfermero_diabolico@registerednurses.com> wrote in message
> news:bqtt76$25oihf$1@ID-147790.news.uni-berlin.de...
> > This is basic physics. Ever hear of the ideal gas law? If your tank
size
> > and temperature are the same, then the amount of gas in the tank is
> directly
> > proportional to the pressure. Double the pressure, double the amount of
> > gas, and (approximately) double the use for any particular application.
> (I
> > say approximately because you can't really get all the gas out. If you
> > require 30 psi pressure for your application, for example, the last 30
psi
> > in the tank is useless.)
> >
> > Earle
> >
> > "Paul Calman" <spam@trap.com> wrote in message
> > news:bqtrp1$26c0rf$1@ID-87669.news.uni-berlin.de...
> > > I already have a 40 ft^2 oxy cyl I can use for compressed air for tire
> > > filling. I've been reading sites about CO2 tanks, they hold 800 Psi,
and
> > and
> > > a scuba/air tank hold 2-3000 Psi.
> > > Does anyone know for sure how same-size tanks compare in fill-up
counts?
> > >
> > > --
> > > Paul Calman, Hathaway Pines, California
> > >
> > >
> >
> >
>
>

Re: CO2 Vs. Scuba tank?
 

I don't know off hand whether CO2 enters a liquid state at room temperature
and sufficient pressure, but I just got off the phone with my daughter who
is a master's student in chemistry and she says it probably does. (She gave
me a hard time too, like I should remember the physical characteristics of
CO2 just because I have a physics degree.) If it goes liquid of course the
ideal gas law doesn't apply and what the CO2 dealer is telling you is
probably true. In that case go with the CO2. Note that this stuff is also
dry and inert and has a lot of advantages over air because of that.

Earle

"Paul Calman" <spam@trap.com> wrote in message
news:bqtu08$26rh17$1@ID-87669.news.uni-berlin.de...
> That's where it gets wierd. one company is saying they get 84 Ft^2 out of
a
> cylinder the same size as a 40 Ft^2 O2 cyl, because it's CO2 in a liquid
> state.
> That's what I'm trying to figure, is a tank under 2000 PSI going to
actually
> deliver only 40 Ft^2 when an 800 Psi tank of CO2 will deliver 84 ? The
> sites of CO2 tank makers only compare with a 150 Psi air tank, not a scuba
> cyl.
>
> --
> Paul Calman, Hathaway Pines, California
> "Earle Horton" <enfermero_diabolico@registerednurses.com> wrote in message
> news:bqtt76$25oihf$1@ID-147790.news.uni-berlin.de...
> > This is basic physics. Ever hear of the ideal gas law? If your tank
size
> > and temperature are the same, then the amount of gas in the tank is
> directly
> > proportional to the pressure. Double the pressure, double the amount of
> > gas, and (approximately) double the use for any particular application.
> (I
> > say approximately because you can't really get all the gas out. If you
> > require 30 psi pressure for your application, for example, the last 30
psi
> > in the tank is useless.)
> >
> > Earle
> >
> > "Paul Calman" <spam@trap.com> wrote in message
> > news:bqtrp1$26c0rf$1@ID-87669.news.uni-berlin.de...
> > > I already have a 40 ft^2 oxy cyl I can use for compressed air for tire
> > > filling. I've been reading sites about CO2 tanks, they hold 800 Psi,
and
> > and
> > > a scuba/air tank hold 2-3000 Psi.
> > > Does anyone know for sure how same-size tanks compare in fill-up
counts?
> > >
> > > --
> > > Paul Calman, Hathaway Pines, California
> > >
> > >
> >
> >
>
>