Installed Aeroflow CO2 Tank Brackets

[swamp2]

Really nice bracket/clamps. Made in Australia. Installed them to my AAL shelf. Had to adjust the angle on my custom siphon tube inside the tank as I had to flip it 180° for access.

They have the company name etched on to the band part and their logo on the CNC milled knobs. Those have stainless steel threads and precision shanks for alignment.

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[dgorsett]

Theoretical question: If I had a tank 1/4 the volume of 4 tires filled to 80 psi could I fill the four tires from 20 psi to 30 psi and would I still have 40 ish psi in the tank? I cannot wrap my head around if this is straight line pressure vs volume.

 

[swamp2]

Sorry @dgorsett , missed your reply/question. Your missing a key thing about CO2 tanks and how they differ from say a SCUBA tank.

The vast majority of the CO2 in such a tank is liquid (a tank designed for 1000 psi)!

The space above the liquid is C02 vapor. A "full" tank is about 2/3 liquid. The vapor pressure at "room temperature" is about 850 psi. Oddly, there is an equilibrium pressure between the vapor and liquid that maintains that same pressure as long as there is any liquid in the tank. It's called the phase equilibrium pressure.

If you used a tank&gas system where the gas didn't coexist with its liquid phase the situation would be very different. You could then use the ideal gas equation PV=nRT. That would apply to your specific question.

If you happen to be interested in how many tires a CO2 tank can fill, this chart courtesy of Power Tank gives tons of data.

 

[CalvinT]

My only concern would be how temperature sensitive CO2 gas is. As a tire warms up, tire pressure increases. How does CO2 compare to air?

 

[swamp2]

My only concern would be how temperature sensitive CO2 gas is. As a tire warms up, tire pressure increases. How does CO2 compare to air?

The thermal expansion of these gasses (N2, O2, Air, CO2) is nearly identical as all are governed by the ideal gas law inside a tire. PV = nRT.

In short, I think that is a myth, perhaps related to the use of totally dry nitrogen in critical aerospace tire applications.

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