Repurposing a medical oxygen concentrator.

[DiveClimbRide]

I've come into the possession of a Home fill II compressor and Platinum 5 concentrator. https://www.invacare.com/product_files/1100873.pdf INVACARE PLATINUM 5 SERVICE MANUAL Pdf Download | ManualsLib. And was wondering at the feasibility of using them to (slowly) create 80~90% fills. I don't think it would be too hard to adapt a fitting that would allow me to fill a scuba tank or a J. From what I could find in the manual it is rated for continuous operation which is good because I think it will take between 28 and 70 hours to fill a J. I heard that oxygen concentrators also concentrate the argon. Would this be a problem for partial pressure blending of nitrox/deco mixtures? Usually not higher that 50%. Basically what haven't I thought of or don't know, that could be a problem. I have found a few references to concentrators in threads but nothing definitive.

 

[grf88]

I've come into the possession of a Home fill II compressor and Platinum 5 concentrator. https://www.invacare.com/product_files/1100873.pdf INVACARE PLATINUM 5 SERVICE MANUAL Pdf Download | ManualsLib. And was wondering at the feasibility of using them to (slowly) create 80~90% fills. I don't think it would be too hard to adapt a fitting that would allow me to fill a scuba tank or a J. From what I could find in the manual it is rated for continuous operation which is good because I think it will take between 28 and 70 hours to fill a J. I heard that oxygen concentrators also concentrate the argon. Would this be a problem for partial pressure blending of nitrox/deco mixtures? Usually not higher that 50%. Basically what haven't I thought of or don't know, that could be a problem. I have found a few references to concentrators in threads but nothing definitive.

Oxygen concentrator

 

[tbone1004]

@DiveClimbRide the thread that @grf88 linked is probably "definitive".

Basically you need/want to take the QD off of one of the bottles that hopefully came with it. That is then an easy to create a fill whip from. You want to make the adapter that way, I promise you, so hopefully it has one of the bottles with the QD on there.

It will reliably spit out 93-95% O2 with the balance being argon. This is fine to use for open circuit deco gas or partial pressure blending directly for 100% O2, no changes are needed.

It will only pump to about 2200psi/150bar and you don't want to try to increase that.

 

[DiveClimbRide]

Oxygen concentrator

Thanks, not sure how I didn't find that.

@DiveClimbRide the thread that @grf88 linked is probably "definitive".

Basically you need/want to take the QD off of one of the bottles that hopefully came with it. That is then an easy to create a fill whip from. You want to make the adapter that way, I promise you, so hopefully it has one of the bottles with the QD on there.

It will reliably spit out 93-95% O2 with the balance being argon. This is fine to use for open circuit deco gas or partial pressure blending directly for 100% O2, no changes are needed.

It will only pump to about 2200psi/150bar and you don't want to try to increase that.

I've got fifteen of the bottles so even if I screw up 14 times it shouldn't be a problem.

 

[tbone1004]

Thanks, not sure how I didn't find that.


I've got fifteen of the bottles so even if I screw up 14 times it shouldn't be a problem.

they're o-ring fittings, so pretty hard to screw them up...