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Oxygen Concentrator

  • Tuesday, February 12, 2019 7:19 AM
    Message # 7159650

    As everyone knows, the 2018 edition includes Oxygen Concentrator as a source of oxygen to feed the pipe network.

    One of the things I do not see described is the quality of the air required or what technology is allowed to be used, Oilles, oilfree, etc.

    Do you know of any requirement established in this regard?


  • Tuesday, February 12, 2019 11:18 AM
    Reply # 7160590 on 7159650
    Al Moon (Administrator)

    From what I have read, its not covered. Nor is the location of the air intake. Just some verbal in section #5.1.3.5.11.6:  

  • Wednesday, February 13, 2019 6:55 AM
    Reply # 7162134 on 7159650

    Jose,  There are no requirements because there is no need for them.  I know this seems paradoxical but it has to do with the sieve materials in the concentrator. Long story short, the sieve is such that it will catch everything which is of concern (oil, hydrocarbons, CO, CO2, SO2, etc, etc., and in fact water vapor too.)  This is why you sometimes see these units hooked directly to the compressor with no dryer and very little filtration, yet they will initially at least produce Oxygen 93 USP.

    Initially is the keyword there - over time, these things will also poison the sieve and ruin it.  Good feed air is the key to a long life for the concentrator, so oil free compressors and good air treatment to remove all the oil, oil vapor and the bulk of the water is wise.  Naturally it is also more cost, and many owners are hoodwinked into believing they are going to save money by vendors who cut these corners to lower the initial investment.  Naturally, the price is paid in early failure and frequent sieve replacement ($$$).   That is why there are a lot of abandoned concentrator installations around the world.  

    More in the attached.  It's a little old now (written before the NFPA came out) but should help you understand "what it's all about".

    1 file
  • Wednesday, February 13, 2019 8:17 AM
    Reply # 7162252 on 7160590
    Al Moon wrote:

    From what I have read, its not covered. Nor is the location of the air intake. Just some verbal in section #5.1.3.5.11.6:  

    Thanks All !! 
  • Wednesday, February 13, 2019 8:21 AM
    Reply # 7162257 on 7162134
    Mark Allen wrote:

    Jose,  There are no requirements because there is no need for them.  I know this seems paradoxical but it has to do with the sieve materials in the concentrator. Long story short, the sieve is such that it will catch everything which is of concern (oil, hydrocarbons, CO, CO2, SO2, etc, etc., and in fact water vapor too.)  This is why you sometimes see these units hooked directly to the compressor with no dryer and very little filtration, yet they will initially at least produce Oxygen 93 USP.

    Initially is the keyword there - over time, these things will also poison the sieve and ruin it.  Good feed air is the key to a long life for the concentrator, so oil free compressors and good air treatment to remove all the oil, oil vapor and the bulk of the water is wise.  Naturally it is also more cost, and many owners are hoodwinked into believing they are going to save money by vendors who cut these corners to lower the initial investment.  Naturally, the price is paid in early failure and frequent sieve replacement ($$$).   That is why there are a lot of abandoned concentrator installations around the world.  

    More in the attached.  It's a little old now (written before the NFPA came out) but should help you understand "what it's all about".

    Thanks Mark very helpful your information, I had an idea about the topic but your comment and paper give me a complete view of it !!
  • Wednesday, February 13, 2019 6:45 PM
    Reply # 7163380 on 7159650

     I was very impressed with Mark Allen’s article. I thought it was very spot on and educational. It also shows that not everybody should sell or maintain an oxygen generator or any medical gas system without the proper training and knowledge. 

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