50% EAN deco tank setup question: SPG need O2 cleaning?

[pakman]

Stupid question,

Does the SPG that's going to be used on my deco reg (for 50% EAN only/ not 100%) need to be 02 cleaned? Or do I just need to swap out o-rings with viton or other O2 friendly - o-rings?

And remind me, the 2nd stage hose for a deco reg is 40" right?

 

[karstdvr]

I've always used 50/50 regs/spg straight out of the box even though the industry uses 40% as their demarcation point. Viton o-rings with oxygen compatible lube may not be a bad idea for the spindle o-rings. 40" hose is convenient for wrapping the hose around the neck,but shorter hoses work if you want it staying in front of you,which isn't a problem if you aren't dealing with multiple tanks.

 

[The Kraken]

Any device or piece of equipment that is to be used with any mix greater than 40% O2 should be prepared for O2 service.

the K

 

[pakman]

thanks Karstdvr

edit: oops didn't see K's post...

 

[Igodeep]

You can probably get away without O2 cleaning everything for a 50%. I personally use an O2 clean hose and gauge for anything over 40%. OMS and XS scuba both have O2 clean pressure gauges, and I'm sure others do too.

 

[mania]

gear used for EAN 50 should be O2 clean. This includes tank as well.

Mania

 

[lamont]

if you're on an O2 deco bottle and your mask isn't O2 clean, should you go onto backgas if you need to clear your mask?

 

[mania]

if you're on an O2 deco bottle and your mask isn't O2 clean, should you go onto backgas if you need to clear your mask?

Forget the mask but think whether your p valve is O2 clean .....

Mania
PS. OK - I meant regulators and tanks.....and you know this very well

 

[Doubles]

if you're on an O2 deco bottle and your mask isn't O2 clean, should you go onto backgas if you need to clear your mask?

That your clear it very very slowly - not to build up any heat to quickly

edit: actually you might check with the vendors. I inquired and found that although publicly rated at 40% when I checked I was told 50% would not be an issue

 

[in_cavediver]

Some say you need it, some say you don't.

Here's my take:

1) With good technique opening valves, you *probably* could get away with a lot of crud

2) With a 'Scuba' O2 clean set and poor technique, you still can have problems.

With that, clean it to a reasonable point and always use good technique when opening valves.

EDIT: Also add - always use o2 compatible materials. good techique and cleanliness doesn't help if it the material is nothing more than fuel.