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My Rix SA-6 Diesel

Discussion in 'Compressors, Boosters & Blending Systems' started by rob.mwpropane, Nov 11, 2020.

  1. rjack321

    rjack321 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
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    The gold bits before the tower look like low volume PMVs to me. I have one that I use when I take my compressor on the road.
    back-pressure-regulator-1-to-10-cfm (scubacompressor.com)

    You can use a PMV as a check valve but its not really ideal.
     
  2. rob.mwpropane

    rob.mwpropane Contributor

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  3. grf88

    grf88 ScubaBoard Supporter ScubaBoard Supporter

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  4. rob.mwpropane

    rob.mwpropane Contributor

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    I'm 90% sure someone on here verified the one installed at the compressor was in fact a PMV and not a check valve. I can't find the picture of the model on the side.

    Edit: found it:
    20201111_163718-jpg.623588.jpg
     
  5. -JD-

    -JD- Eclecticist ScubaBoard Supporter

    # of Dives: 50 - 99
    Location: Greater Philadelphia, PA
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    Wouldn't using a PMV as a check valve at the compressor outlet be advantageous as it allows the compressor to be operated without the filter tower?

    Also, as I understand it from earlier in the thread, minimizing the time the floating 3rd stage is not properly loaded is important, right? Without a PMV at the compressor outlet, the significantly larger filter volume would add to the unloaded time, significantly more than just that caused by the separator.

    Of course, I could very possibly be misinterpreting/misremembering the scattered mass of information earlier in the thread ...
     
  6. rob.mwpropane

    rob.mwpropane Contributor

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    That's the way I understand / interpreted it....but that doesn't mean much.

    Going back through the thread it was @rjack321 that verified the picture was a PMV and not just a check valve.
     
  7. grf88

    grf88 ScubaBoard Supporter ScubaBoard Supporter

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    Without a filter tower installed you are correct that the PMV on the compressor has great value. If there is a check valve before the filter it does not add as much value as the filter tower remains pressurized and serves the same purpose.
     
  8. rhwestfall

    rhwestfall Woof! ScubaBoard Sponsor

    # of Dives: 200 - 499
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    :happywave: similar...

    Compressor -> OEM Separator w/ manual drain -> OEM AC only filter (repurposed to 13x MS) with manual drain* -> Moisture monitor -> check valve -> manual drain -> filter (AC, Hop,13x) -> hyper filters :D -> PMV -> fill whip/CO Monitor.

    * - This is where the old compressor fill whip was attached.
     
    couv and rob.mwpropane like this.
  9. rhwestfall

    rhwestfall Woof! ScubaBoard Sponsor

    # of Dives: 200 - 499
    Location: "La Grande Ile"
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    Mine that looks exactly like that is (as I was told) a rebuildable check valve not a PMV...
     
  10. rob.mwpropane

    rob.mwpropane Contributor

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    Does your have the same #'s? I tried looking them up but I get nowhere.
     

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