<div dir="ltr">Hi Alan<div>you are right, </div><div>Emile is a good ressource too. He made my scrubber, using radial (not axial) fans, which are better handling back pressure.</div><div>I also made my scrubber fatter than Emile's original design, to reduce delta P, and allow for this extra charcoal back pressure, or to put my two scrubbers in series.</div><div><br></div><div>the other thing is, when not doing much exercize in the sub, and without the extra charcoal filter, I can put 12V through the fan in one or both scrubbers, instead of 24V. this way the load and noise go down a lot. and CO2 not much up.</div><div><br></div><div>regards</div><div>Antoine</div><div id="m_-1882069785374903277DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br> <table style="border-top:1px solid #d3d4de">
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<a href="#m_-1882069785374903277_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"></a></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Sep 19, 2017 at 10:04 PM, Alan via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>Antoine / Hank,</div><div id="m_-8144545943323326676AppleMailSignature">with the comments about the scrubber fan slowing down you got me</div><div id="m_-8144545943323326676AppleMailSignature">thinking about the load on the fan motor. It would be interesting</div><div id="m_-8144545943323326676AppleMailSignature">to test the amp draw under normal operation, attached to the scrubber</div><div id="m_-8144545943323326676AppleMailSignature">& with extra filters. It is a critical piece of equipment & we may be loading</div><div id="m_-8144545943323326676AppleMailSignature">some of these fans beyond what they are designed for!</div><div id="m_-8144545943323326676AppleMailSignature">I am not saying we are, but it is something I hadn't considered.</div><div id="m_-8144545943323326676AppleMailSignature">Cheers Alan </div><div id="m_-8144545943323326676AppleMailSignature"><br>Sent from my iPad</div><div><div class="h5"><div><br>On 20/09/2017, at 6:28 AM, Antoine Delafargue via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>> wrote:<br><br></div><blockquote type="cite"><div>I did not upgrade the fan but indeed noticed the flow rate dropped a bit<div>I used a short pvc pipe (water collection type) 200mm diam i think, with end caps on each end (each male side glued in the pvc section, female side just screwed by hand to open/close (few dollars at dyi store) </div><div>lots of 10mm holes in both end caps<br>And scotchbrite filters (kitchen sponges/scrub) against each end cap to hold charcoal in </div><div>I had actually made a small oxygen rebreather scrubber to hold the sodalime with that same cheap method.</div><div><br></div><div>Antoine </div><div> <br>On Tuesday, September 19, 2017, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><div></div>
<div>Hi Antoine,</div><div>Did you have to up size the fan or are you on lung power only? I will put a charcoal filter on just because it seems practical and it is pretty cheap.</div><div>What did you use for the filter?</div><div>Hank</div><div><br></div>
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On Tuesday, September 19, 2017, 11:37:02 AM MDT, Antoine Delafargue via Personal_Submersibles <<a>personal_submersibles@psubs.o<wbr>rg</a>> wrote:
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<div><div><div>Hi Hank<div>I have installed one on the intake hose of the scrubber. With a dedicated cannister. It works well for odors but don t think it would be any good for smoke and all its possible harmful contents like carbon monoxide.</div><div>Regards</div><div>Antoine <br clear="none"><br clear="none">On Tuesday, September 19, 2017, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect">personal_submersibles@psubs.o<wbr>rg</a>> wrote:<br clear="none"><div><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><div>Hi All,</div><div>A while back we were talking about charcoal filtering the sub environment. Sean suggested a charcoal filter and it has been on my mind. I think it is a great idea. I was thinking about putting the charcoal filter on the scrubber intake because my rebreather scrubber is a sealed can. The other scrubber would need to have the filter on the discharge end. </div><div>Has anyone done this.</div><div>This has come to mind after Scott brought up the smoke issue. Is there a reason I should not put one at the intake of my rebreather scrubber. It should help with toxic smoke since it is the scrubber I can breath through manually.</div><div>Hank</div></div></div></blockquote></div></div></div></div><div><div>______________________________<wbr>_________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect">Personal_Submersibles@psubs.or<wbr>g</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/l<wbr>istinfo.cgi/personal_submersib<wbr>les</a><br clear="none"></div></div></div>
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