Mailing List Archive Mailing List Archive
You can now get a helium lock for standard scuba valves that virtually eliminates helium loss through valves. It has no effect on helium diffusion THROUGH the cylinder. Buying aluminum scuba cylinders impregnated with anti-helium crosslinks eliminates any loss through the cylinders. Using the helium lock in combination with the aforementioned scuba cylinders has been shown to virtually eliminate helium loss due to diffusion. Helium locks are available in key or combination configuration- metric and english versions are available. The manufacturer is looking for evaluators to test the unit in England. The demand is anticipated to be so great that only those British divers with last names that begin with "A" will be accepted as evaluator candidates for the first batch of units sent to Europe. On Wed, 20 Dec 1995, samuel frushour wrote: > This gas separation is a persistant misconception perpetrated by folks > who analyse too soon after mixing. Better check out your basic gas > physics. O2 quickly diffuses through the air and most other gasses do > also. The rolling of tanks speeds the process. I dare say that your > nitrox mix will be just fine in a couple of weeks even if you don't roll > the tanks and the mix will not change. Kind of hard for all that O2, N2 > etc. to difuse through you tanks (It is a different matter with helium). > IMHO > Sam Frushour > > On Wed, 20 Dec 1995, Harry Jones WISD wrote: > > > Date: Wed, 20 Dec 1995 08:11:24 -0600 (CST) > > From: Harry Jones WISD <haj@te*.ed*> > > To: Mail Tek-Diver <techdiver@terra.net> > > Subject: O2 Spikes and Nitrox > > > > I have seen several references to "O2 spikes" and Nitrox (a situation > > were a diver breaths a fraction of O2 greater than the sum of a given > > mix). Is this a real concern with Nitrox? I got my TDI Nitrox > > certification this year and have used Nitrox on about 50 dives since. > > I ALWAYS analyize my mix before EVERY dive, but if O2 does "seperate", > > the odds of an "O2 spike" are very real! > > > > I recently went into the local dive shop where I get my Nitrox fills and > > they were rolling tanks back-and-forth across the floor, "mixing the gas" > > after a fill. This concerned me because I get my tanks filled with > > EAN 32 & 36 and may not actually dive the tanks for 1 or 2 weeks. Will > > the gases "seperate"? Should I physically "mix" the gas (roll the tank > > around) before each dive? Will O2 stay in gasious solution? > > > > Thanks in Advance > > Harry Jones > > haj@te*.ed* > > Padi DM-91974 > > > > -- > > Send mail for the `techdiver' mailing list to `techdiver@terra.net'. > > Send subscription/archive requests to `techdiver-request@terra.net'. > > > -- > Send mail for the `techdiver' mailing list to `techdiver@terra.net'. > Send subscription/archive requests to `techdiver-request@terra.net'. >
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]