Dust & me

ebourzeix · 26th February 2008, 00:00

My last dive has been done with an ARO C96 'Castoro' (100% o2 ccr).

I was surprised on the first inspiration to breath some dust of sorb (nothing more some minutes later).

Victim of a too simple conception

?

Yes and no. I forgot to sieve sorb and discovered that an intermediary lung between scruber and diver's mouth could be useful.

Humidity is also important by fixing dust in the loop (hose).

3 easy solutions:

1. to add a simple filter.

2. to sieve sorb

3. to change sorb (Dräger Divesorb for now)

Any other ideas welcome

Eric

Dutchy · 26th February 2008, 07:20

Some/all of the above?

I use Sperasorb and I feel it contains a lot less dust.

In addition I read the advice to take off the hoses and give a good blow on the exhale side to blow the dust out before diving.

Having done that I feel there's no need to have a filter of any kind installed but hey that's only my 0.02c

***Decodiver*** · 26th February 2008, 09:03

Hi Eric,

We have loads of Sofnolime 797 for sale in Coppet, ditch the Drager sorb and come and buy some of the good stuff...

...

Zero Gravity Diving - Sofnolime 797

Cheers,

Dave.

ebourzeix · 26th February 2008, 17:09

Quote:

I use Sperasorb and I feel it contains a lot less dust.

Thks Dutchy. Indeed it seems to be a better solution than using a (state-of-art

) filter.

Quote:

We have loads of Sofnolime 797 for sale in Coppet, ditch the Drager sorb and come and buy some of the good stuff..

Good idea, Dave !

Best regards,
Eric

Dutchy · 26th February 2008, 17:18

Quote: (Originally Posted by ebourzeix)

Thks Dutchy. Indeed it seems to be a better solution than using a (state-of-art

) filter.

Well tbh I did use a filter until I learned to get rid of dust by just blowing the remaining dust out as described. When the filters came out clean time after time I couldn't be bothered anymore. I have btw never noticed any wob change but I suspected when really wet there may be an effect.

Gilles · 27th February 2008, 06:47

Quote: (Originally Posted by ebourzeix)

3. to change sorb (Dräger Divesorb for now)

Any other ideas welcome

Eric

Quote: (Originally Posted by Dutchy)

I use Sperasorb and I feel it contains a lot less dust.

The Drager Divesorb I have used has always been very dusty. Switched to the only other alternative (Spherasorb), and found it to be much cleaner, breathes easier, seems to last just as long, and is significantly cheaper (in my current location).

johnv · 27th February 2008, 09:06

If you plan to mod the c96 for use at depth packing the scrubber very very well is a good idea and you will get some dust as you need to tap the scrubber a lot.

using spherasorb helps, but will reduce the scrubber life by a lot compared to 797.

When you pack the scrubber, place a hoover nozzle, first round the outside and then most importantly seal it into the center of the scrubber (with your hand). This then draws a lot of air and most of the dust through the scrubber and into the hoover.

good luck
John

lizardland · 27th February 2008, 12:01

I was getting a lot of dust (and some granules) depositing in the head of my CK. I fitted an Inspiration scrim to the top of the scrubber which has stopped it. I don't know if this is something that can be fitted on yours?

johnv · 27th February 2008, 12:52

Quote: (Originally Posted by lizardland)

I was getting a lot of dust (and some granules) depositing in the head of my CK. I fitted an Inspiration scrim to the top of the scrubber which has stopped it. I don't know if this is something that can be fitted on yours?

nope, c96 / p96 can't really have a filter fitted, only way is to remove the dust before starting.

26th February 2008, 00:00	#1 (permalink)
ebourzeix New Member Current Rebreather/s: rEvo Other CCR RB80 / Clone Home Build Other Rebreather/s: rEvo Other CCR RB80 / Clone Home Build Join Date: Mar 2006 Location: Geneva (CH) Posts: 67	Dust & me My last dive has been done with an ARO C96 'Castoro' (100% o2 ccr). I was surprised on the first inspiration to breath some dust of sorb (nothing more some minutes later). Victim of a too simple conception ? Yes and no. I forgot to sieve sorb and discovered that an intermediary lung between scruber and diver's mouth could be useful. Humidity is also important by fixing dust in the loop (hose). 3 easy solutions: 1. to add a simple filter. 2. to sieve sorb 3. to change sorb (Dräger Divesorb for now) Any other ideas welcome Eric __________________ http://plongeesanssel.com http://leman.oldiblog.com/?page=articles
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26th February 2008, 07:20	#2 (permalink)
Dutchy SK#007 Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: Apr 2006 Location: Nieuwegein (The Netherlands) Posts: 693	Re: Dust & me Some/all of the above? I use Sperasorb and I feel it contains a lot less dust. In addition I read the advice to take off the hoses and give a good blow on the exhale side to blow the dust out before diving. Having done that I feel there's no need to have a filter of any kind installed but hey that's only my 0.02c __________________ = This post is environmentally friendly. It is composed of 100% recycled electrons only. = SK #007
(Online)

26th February 2008, 09:03	#3 (permalink)
*Decodiver* Administrator Current Rebreather/s: Megalodon Ouroboros rEvo Other CCR Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss rEvo Other CCR Join Date: Jan 2005 Location: Geneva Posts: 2,164	Re: Dust & me Hi Eric, We have loads of Sofnolime 797 for sale in Coppet, ditch the Drager sorb and come and buy some of the good stuff...... Zero Gravity Diving - Sofnolime 797 Cheers, Dave. __________________ CCR/OC Trimix Instructor Trainer CCR Training to Mixed Gas in Switzerland, France, UK & Germany on Megalodon/COPIS-Megalodon/KISS/Sport KISS/Ouroboros/rEvo/Inspiration/Evolution/Sentinel www.zerogravitydiving.com Rebreather World Terms & Conditions
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26th February 2008, 17:09	#4 (permalink)
ebourzeix New Member Current Rebreather/s: rEvo Other CCR RB80 / Clone Home Build Other Rebreather/s: rEvo Other CCR RB80 / Clone Home Build Join Date: Mar 2006 Location: Geneva (CH) Posts: 67	Re: Dust & me Quote: I use Sperasorb and I feel it contains a lot less dust. Thks Dutchy. Indeed it seems to be a better solution than using a (state-of-art) filter. Quote: We have loads of Sofnolime 797 for sale in Coppet, ditch the Drager sorb and come and buy some of the good stuff.. Good idea, Dave ! Best regards, Eric __________________ http://plongeesanssel.com http://leman.oldiblog.com/?page=articles
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26th February 2008, 17:18	#5 (permalink)
Dutchy SK#007 Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: Apr 2006 Location: Nieuwegein (The Netherlands) Posts: 693	Re: Dust & me Quote: (Originally Posted by ebourzeix) Thks Dutchy. Indeed it seems to be a better solution than using a (state-of-art) filter. Well tbh I did use a filter until I learned to get rid of dust by just blowing the remaining dust out as described. When the filters came out clean time after time I couldn't be bothered anymore. I have btw never noticed any wob change but I suspected when really wet there may be an effect. __________________ = This post is environmentally friendly. It is composed of 100% recycled electrons only. = SK #007
(Online)

27th February 2008, 06:47	#6 (permalink)
Gilles Worship the feminine Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Den Haag (Netherlands) Posts: 761	Re: Dust & me Quote: (Originally Posted by ebourzeix) 3. to change sorb (Dräger Divesorb for now) Any other ideas welcome Eric Quote: (Originally Posted by Dutchy) I use Sperasorb and I feel it contains a lot less dust. The Drager Divesorb I have used has always been very dusty. Switched to the only other alternative (Spherasorb), and found it to be much cleaner, breathes easier, seems to last just as long, and is significantly cheaper (in my current location). __________________ Gilles http://www.dirrebreather.com
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27th February 2008, 09:06	#7 (permalink)
johnv Custom Title Allowed! Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Dec 2005 Location: UK Posts: 125	Re: Dust & me If you plan to mod the c96 for use at depth packing the scrubber very very well is a good idea and you will get some dust as you need to tap the scrubber a lot. using spherasorb helps, but will reduce the scrubber life by a lot compared to 797. When you pack the scrubber, place a hoover nozzle, first round the outside and then most importantly seal it into the center of the scrubber (with your hand). This then draws a lot of air and most of the dust through the scrubber and into the hoover. good luck John
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27th February 2008, 12:01	#8 (permalink)
lizardland Yak Current Rebreather/s: Classic Kiss Ray Home Build Other Rebreather/s: Ray Home Build Join Date: Mar 2005 Location: North... Posts: 1,138	Re: Dust & me I was getting a lot of dust (and some granules) depositing in the head of my CK. I fitted an Inspiration scrim to the top of the scrubber which has stopped it. I don't know if this is something that can be fitted on yours? __________________ Can you imagine drifting along in the sea with your mouth open and a load of f***ing plankton going in? You'd like it, would you? www.westons-cider.co.uk Azerbaijani Association of Technical Divers Publicity Officer and Goat Wrangler
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27th February 2008, 12:52	#9 (permalink)
johnv Custom Title Allowed! Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Dec 2005 Location: UK Posts: 125	Re: Dust & me Quote: (Originally Posted by lizardland) I was getting a lot of dust (and some granules) depositing in the head of my CK. I fitted an Inspiration scrim to the top of the scrubber which has stopped it. I don't know if this is something that can be fitted on yours? nope, c96 / p96 can't really have a filter fitted, only way is to remove the dust before starting.
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