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***jradomski*** · 12th October 2006, 13:22

Quote: (Originally Posted by Dawktah)

Hello!

I haven't taken a CCR course as of yet but was doing more research. I am currently taking a gas blender course. I am trying to schedule some CCR introductions in the near future.

I just needed to know if Oxygen obtained by a Pressure Swing Absorption unit is satisfactory for diving CCR at a max concentration of 95%? The unit has a flat cost over time versus the cost of buying oxygen from a supplier when its not readily available or is locally expensive.

Thanks,

Chris

Yes it is acceptable, although 100% is preferred.. On several electronics systems, the calibration requires 100% oxygen so you either need a small supply of 100% o2, dela with the calibration error, or use some tricks to get a proper calibration (see my article about accurate po2 calibration on this site)

Several PSA systems can be fitted with an additional stage that absorbs the argon and results in 99.9% purity.. its bascally another PSA system designed to absorb Argon instead of Nitrogen..

12th October 2006, 13:22	#4 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Join Date: Mar 2005 Location: "Da" Bronx Posts: 3,126	Re: Pressure Swing Absorption, 95% O2? Quote: (Originally Posted by Dawktah) Hello! I haven't taken a CCR course as of yet but was doing more research. I am currently taking a gas blender course. I am trying to schedule some CCR introductions in the near future. I just needed to know if Oxygen obtained by a Pressure Swing Absorption unit is satisfactory for diving CCR at a max concentration of 95%? The unit has a flat cost over time versus the cost of buying oxygen from a supplier when its not readily available or is locally expensive. Thanks, Chris Yes it is acceptable, although 100% is preferred.. On several electronics systems, the calibration requires 100% oxygen so you either need a small supply of 100% o2, dela with the calibration error, or use some tricks to get a proper calibration (see my article about accurate po2 calibration on this site) Several PSA systems can be fitted with an additional stage that absorbs the argon and results in 99.9% purity.. its bascally another PSA system designed to absorb Argon instead of Nitrogen.. __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.
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