Anyone know! Thank you.

Informative link: How Does a Nitrogen Generator Work?

[image] TwinTurbo: Informative link Thanks. I would have guessed it was done by freezing air. Because of entropy, oxygen will infiltrate the tire until it has the same concentration as the atmosphere.

[image] RandomTroll: Because of entropy, oxygen will infiltrate the tire Nature is relentless :grinning: The tire liner is made from a butyl rubber compound that is impermeable to liquids and gases: Butyl rubber has the distinction of being the only rubber material that is truly impermeabl…

[image] RandomTroll: Because of entropy, oxygen will infiltrate the tire until it has the same concentration as the atmosphere. Close, it’s until it has the same partial pressure. Given the near-impermeability of the rubber, that never happens. But I do wonder if small amounts of oxygen inf…

I just moved my hot rod from the other house to here, it has been over 2 years since I have been able to mess with it and it has sat through single digit winters with close to if not 3 digit summers, so at least 85-90+ degree swing between the 2 seasons, front tires were down from 35 to about 26 psi…

Don’t know and not an engineer nor a scientist so really don’t care… lol I just know air leaks out of tires overtime (different tires = different rates), just like I know if I jump out of an airplane at 30,000 feet without a parachute I will go splat on the ground and die (most likely), don’t need …

At a thrift store bought an adult tricycle with big basket in back. The three-speed [Slow - Slower- Slowest] tricycle’s 20-inch street tires were totally flat. Treads had no wear. Probably given to a senior who never rode it. Bike store said it sold for $325. Thrift store sold for $19.95 proba…

[image] TwinTurbo: The tire liner is made from a butyl rubber compound that is impermeable to liquids and gases: The permeability of butyl rubber to nitrogen is 1.80×10-09 in cm, atmospheres, seconds (atmospheres*area/thickness); oxygen’s is 2.18×10-09. I calculated that my 195/75R15 lose abo…

Costco inflates tires with N2 (Nitrogen). How do they concentrate nitrogen?

General Discussion

Robert-Gift May 3, 2024, 3:46pm 31

Wonder how much gas molecule migration occurs out through the tire materials.
Vacuum tubes have a problem of small gas molecule, H2?, He?, N? permeation through the glass envelopes and interfering with electron flow in the vacuum tubes.

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Costco inflates tires with N2 (Nitrogen). How do they concentrate nitrogen?

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