in_cavediver
Contributor
onohunter:
When 02 cleaning, the area's you really have to watch for are the ones that see HP 02. 2nd stages generally don't see HP 02. I personally don't do anything special for the 2nd stages.
50% EAN deco tank setup question: SPG need O2 cleaning?
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When 02 cleaning, the area's you really have to watch for are the ones that see HP 02. 2nd stages generally don't see HP 02. I personally don't do anything special for the 2nd stages.
It is true that the 'standard' has been set out out there at 40% (there are other thoughts, but that is a different thread). Ideally you would want to have everything above 40% O2 cleaned, paying special attention to HP areas. Adiabatic heating occurs due to a change in the pressure of a gas. But the SPG is a closed system, so only the moment you 'charge' the spg, you get an increase of pressure. This is in my opinion not enough to heat it up for combustion, especially since you should charge the SPG slowly anyway. Now if you look inside the spg orrifice and see gunk, of course you would want to clean it out, but I don't think it needs O2 cleaning.nadwidny:
A tank/valve is a different matter, here you have a higher, more sustained pressure change and far more heat generated. Here you would be well advised to have them O2 cleaned.
Disclaimer: I am not a trained professional when it comes to SCUBA and/or Gas management so take my comments at face value and seek professional advise should you not be sure about anything written above.
I know all that. I've been diving pure O2 and high O2 mixes for almost 11 years. It doesn't answer my question. I want to know exactly how those that claim SPGs must be prepared for oxygen service suggest it be done.
Disclaimer-I am a trained professional when it come to SCUBA and/or Gas management. I have received the training and I have the practical experience to have half a clue when I talk about these subjects.
Disclaimer-I am a trained professional when it come to SCUBA and/or Gas management. I have received the training and I have the practical experience to have half a clue when I talk about these subjects.
I've seen swivels on SPG's packed with silicone grease. I remove it with Q-tips and some simple green, then put a little O2 compatible lubricant in there.
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