I own a (Almost new) Atomics T2...want to trade in for a ST1

[Eskasi]

I bought the T2 but completely forgot that Titanium and Nitrox do not mix! I had to use it for that one trip but now would like to change for a EAN compatible Reg (even though the T2 breathes really sweet!).

I will be in Florida next month and am wondering if Atomics Dealers do trade ins? I know I am going to lose a fair bit on the T2 but was just wondering how much extra I would have to pay (if any) to swap over to a ST1?

Anyone have a clue? I thought I would post here first before making long distance calls to Atomics dealers in the US. Perhaps someone here has some advice?

 

[aquaman_06]

Not sure about Atomic trade in's. The guy I deal with that sells Atomic does but I am good friends with him. You will find any Atomic reg breathes just as easy. They are all the same piston design the only difference as you go to higher priced regs is that they are made with different materials.

 

[TravisD]

The T2 is good to 40% nitrox, though Atomic indicates that you must "Dedicate" it to Nitrox. Do you intend to go over 40%?

 

[Eskasi]

The T2 is good to 40% nitrox, though Atomic indicates that you must "Dedicate" it to Nitrox. Do you intend to go over 40%?

I don't.... not a tech diver. However, as I understand it in the manual (and from some posts on this board), You can use the T2 with nitrox as long as you use it for nitrox only. If you do use it with air later, you MUST send it in for cleaning again before EAN use.

This simply can't work for me as I go to some remote dive locations where air is the only option I have..... Then when I go on a liveaboard trip hoping to squeeze as much as 5 dives a day, I would rather use Nitrox....

 

[tfsails]

Maybe I'm dumb; I do not see any reason why you can't go from sub-40% nitrox to air and back on ANY reg without cleaning it. The reasoning behind the 40% figure has to do with the combustibility of higher-percentage mixtures when it contacts hydrocarbons, and the tendency of black O-rings to break down in high O2 atmospheres.

Does titanium do funny things in high-oxygen atmospheres? My dive shop is an Atomic dealer and I've rebuilt plenty of Zs and Bs, but never an M1, ST1, or a T1. I do not recall seeing anything in Atomic's literature about any restrictions on the T1.

 

[Jimmer]

Maybe I'm dumb; I do not see any reason why you can't go from sub-40% nitrox to air and back on ANY reg without cleaning it. The reasoning behind the 40% figure has to do with the combustibility of higher-percentage mixtures when it contacts hydrocarbons, and the tendency of black O-rings to break down in high O2 atmospheres.

Does titanium do funny things in high-oxygen atmospheres? My dive shop is an Atomic dealer and I've rebuilt plenty of Zs and Bs, but never an M1, ST1, or a T1. I do not recall seeing anything in Atomic's literature about any restrictions on the T1.

I agree, if you're never going to use it above 40%, then I wouldn't worry about it. It's deco regs that are used for high % O2 that need consideration when you use them with air.

Yes Ti does do funny things in high concentrations and pressures of O2. Very funny, not cool things if you own the reg. If you don't own the reg, it might be kind of cool.

 

[Eskasi]

Maybe I'm dumb; I do not see any reason why you can't go from sub-40% nitrox to air and back on ANY reg without cleaning it. The reasoning behind the 40% figure has to do with the combustibility of higher-percentage mixtures when it contacts hydrocarbons, and the tendency of black O-rings to break down in high O2 atmospheres.

Does titanium do funny things in high-oxygen atmospheres? My dive shop is an Atomic dealer and I've rebuilt plenty of Zs and Bs, but never an M1, ST1, or a T1. I do not recall seeing anything in Atomic's literature about any restrictions on the T1.

Yeah, Titanium and higher levels of O2 don't mix. Having said that, I am "pretty sure" that there should not be any problems for use with Nitrox and that the disclaimer is for the lawyers for Atomics.....However, better to be safe than sorry.... It says so on the T2 Manual that I can't (or shouldn't). Thats enough for me. I wish I had remembered this before splashing the cash.

Anyway......any dealers out there that could give me an indication of what to expect?

 

[Scared Silly]

Yes Ti does do funny things in high concentrations and pressures of O2. Very funny, not cool things if you own the reg. If you don't own the reg, it might be kind of cool.

no not cool, hot, damn hot, real, burning down the house hot.

So here is the oddity with the restriction. If filling with anything BUT partial pressure blended Nitrox there is a chance of hydro carbon build up. This is because the air used does not need to filtered to as a high of a standard as that required for partial pressure blending. So from a cleanliness point of view it is no different than std air. Now if partial pressure blending it will be cleaner but still no affect on the reg. So I am not sure about it other than for CYA.

I know AA says 80% instead of 100% for the M1 even with using monel. That is a CYA as well.

 

[Eskasi]

CYA? What does that mean?

So, scared silly, are you saying that I should be ok using this reg with under 40% EAN? I think I would still rather have the peace of mind..... unless there are many out there ignoring this warning...

 

[Jimmer]

CYA? What does that mean?

So, scared silly, are you saying that I should be ok using this reg with under 40% EAN?

That's what we're all saying.