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

[BKP]

CYA = Cover Your A$$

The T1/T2 user manual (page 9) states it should be dedicated to either air or EAN:

"At time of purchase, you must decide if this regulator is to be used with
EAN or standard compressed air. If you desire to use EAN, this product
must be dedicated for EAN only and identified as such. Do not switch
between EAN and standard compressed air, as compressed air may
contain traces of hydrocarbons which could contaminate your regulator
system with potentially flammable residues incompatible with EAN. If
you use or test this regulator with compressed air, it must be re-cleaned
before EAN use."

However, the rep I've spoken with (through one of the local LDS's) says it's not a problem to use both interchangeably, if you're using standard recreational mixes (32% or 36%). The LDS owners have been using the T1/T2 on both air and EAN for years (for what it's worth).

I don't see the problem with using blended vs. banked, since the 1st stage isn't attached to the valve during the blending, anyway, and never comes in contact with 100% O2.

 

[Scared Silly]

Eskasi, If I owned a T2 I would not worry about gong back and forth between air and Nitrox as long as the Nitrox is under 40%. Pretty much everyone feels this way.

BKP, The only time I can think of that one might attach a reg to a cylinder whilst partial pressure blending is after adding O2 but before adding hyperfiltered air. Why? cause for some reason they want to check the O2 percentage and need to use their LP hose to connect to their analyzer. Which in this case the O2 percentage in all likelihood is going to be above 40%. But if they are doing that then they screwed up something along the way.

 

[Cyclops_Diver]

Personally, I wouldnt worry about it if your nitrox mix is below 40%. I dont. and I own the T2 reg setup as well as the titanium ST1. Switch back and forth between nitrox and air too. Titanium all around!

Great travel regs. Light as a feather! (wonder what they will weigh with Miflex hoses?) However I'm venturing into tech so my other six regs are all Scubapro and I havent touched my T2 in a while and I dont use the ST1 at all anymore!

But I digress...so back to the topic.

I've used my T2 and ST1 for two years now, switching mixes back and forth. My LDS doesnt see a problem with it, and the AA rep that came through the shop didnt really see a problem with it either. However that was an off-the-record conversation. Most likely for CYA reasons!

YMMV

 

[Eskasi]

Cool! Thanks Guys.....you saved me a bunch of money! I called Scubatoys and the guy almost refused to sell me a ST1 saying the same thing! lol....

I feel much more comfortable about it. I also dug up almost ALL the posts on this and read them all....I'll also make sure i pressurize the first stage slowly as an added precaution.

Thanks so much!