[PSUBS-MAILIST] tampon filters

[hank pronk]

Steve,
I have a bailout bottle with clean air, so I really only wanted the hp tank air to breathable for surfacing while the sub is full of smoke.  Odour makes no difference because it is for such a short time.  having said that, since I know  nothing about filtration, I will get a larger bail out bottle and use that for all emergencies.  Thanks'  for the input, that was very helpful.
Hank



On Saturday, January 25, 2014 12:14:44 PM, Stephen Fordyce <stephen.fordyce at gmail.com> wrote:
  
Hi guys,
I've spent a good amount of time messing around with HP breathing air compressors (I have my own for SCUBA diving) and can volunteer these 2 links as explaining the final filtration process really well. 
http://www.neptunoworld.com/articles/compressors.html 
http://www.michaelmcfadyenscuba.info/viewpage.php?page_id=16 
But in a nutshell, if you're going to be breathing it, especially if you have to bail out at depth, I wouldn't be trusting my life to tampons... The activated carbon and molecular sieve are pretty cheap, and much more manly :). 
Using an old hydraulic cylinder also has high potential for adding odours to your air that no filtration will get rid of - there is some good stuff about that in some the Airspeedpress books on diy oxygen systems. 
Cheers,
Steve
 
On 26/01/2014 4:44 AM, "Douglas Suhr" <spiritofcalypso at gmail.com> wrote:

Never heard that one before! Hank, just tell 'em you're helping your wife by gathering supplies for that "girls puberty class" she volunteers to teach :) 
>
>
>Joking aside, if tampons really work I might ask you to grab me some Depends because I'll be peeing myself! But this is what us psubbers are about: Innovation and improvisation. Good work Hank. Can't wait to see Gamma. 
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>On Sat, Jan 25, 2014 at 12:29 PM, hank pronk <hanker_20032000 at yahoo.ca> wrote:
>
>Vance,
>>I am taking air off the manifold for the scuba regulator. I have made no changes to the hp system, it is all original.   I have a compressor on board to re-fill the hp tanks.  I like how convenient it is to fill the hp tanks without taking them out of the sub. 
>>Hank
>>
>>
>>
>>On Saturday, January 25, 2014 10:24:35 AM, "vbra676539 at aol.com" <vbra676539 at aol.com> wrote:
>>  
>>You lost me here. A compressor? Why not tap into the HP system with a two charging blocks and clamp on scuba 1st/2nd stage regulators? You need a BIBS of some sort, and the simpler the better, as smoke tends to unravel the nerves a bit with a couple of hundred feet of water over your head. What air do you need to pump? 
>>Vance
>>
>>
>>
>>-----Original Message-----
>>From: hank pronk <hanker_20032000 at yahoo.ca>
>>To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
>>Sent: Sat, Jan 25, 2014 12:13 pm
>>Subject: [PSUBS-MAILIST] tampon filters
>>
>>
>>Gamma has an onboard hp compressor now.  Since I may need to breathe the air from the main hp tanks in case of smoke or passing gas :-)  I need to filter the air.  I am making a filter housing from a hydraulic cylinder and filling it with tampons.  I read that tampons work for this.  Is that true?  I hate buying tampons, !! 
>>Hank    
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