How long can I leave it in ?

P6017 · 9th February 2006, 23:51

Why, as cheap as scrubber material is, would you not just dump it and add fresh.
Pete

Nick uk. · 10th February 2006, 00:12

Quote: (Originally Posted by E-man)

Especially if you just doing pool dives... im sure you'll be fine

Oh NOOOOOOOOOOOO, shit, this is just like saying 'GOOD LOOK' to an actor!

Or sticking a pork chop round the lion tamers neck.

James Appel · 10th February 2006, 00:56

Quote: (Originally Posted by Nick uk.)

Oh NOOOOOOOOOOOO, shit, this is just like saying 'GOOD LOOK' to an actor!

Or sticking a pork chop round the lion tamers neck.

Im sure everyone has heard about this

http://www.cdnn.info/news/safety/s051227.html

Just because its in a pool dosnt meen that you cant suffer from some mistake in judgment or equiptment failure

lizardland · 10th February 2006, 09:25

Canadian Forces had DCIEM look at this to improve rebreather diver readiness times by prepping units in advance. They tested both fresh and partially used lime and came up with protocols. Generally speaking with the loop closed and holding pressure then IIRC they could store it for 10days. The report indicated that this storage time could be much longer but the tests ended after 10 days so couldn't authorise any longer periods.

Duncan Price · 10th February 2006, 13:28

I left one of my units full all last year - I filled the scrubber in January, did an hour long dive on it in March, another hour in the June and took it to the pool in October for an half hour muck about. Finally, the other week I emptied the scrubber...the loop was sealed in between times.

***ScubaDadMiami*** · 11th February 2006, 07:47

"As a rule, you should not leave your filled scrubber canister for long periods. This leads to powdering in the canister resulting from transport. Many units inadequately isolate the absorbant. If you must save absorbant in your canistger, follwin the manufacturer's recommendations for doing so." Mastering Rebreathers (Bozanic 2002), p. 186.

Now, this is what the book says. On the other hand, I can't see why keeping the Rebreather from moving about (us Extend Air Cartridge users don't have to worry about that one too much), flushing with oxygen or helium (to assure that there is no atmospheric CO2 in starting a reaction), and then closing the loop on not-yet-activated/pre-breathed scrubber should matter almost in the least. It would seem that one would be able to keep the scrubber in the unit until the expiration of the scrubber like this. Am I missing something here?

ebon.hawk · 11th February 2006, 08:43

Quote: (Originally Posted by ScubaDadMiami)

"As a rule, you should not leave your filled scrubber canister for long periods. This leads to powdering in the canister resulting from transport. Many units inadequately isolate the absorbant. If you must save absorbant in your canistger, follwin the manufacturer's recommendations for doing so." Mastering Rebreathers (Bozanic 2002), p. 186.

After looking at the 10 containers of Dragersorb I need to use up pretty quickly, going to dump the current contents of the scrubber.

Can the Mastering Rebreathers book only be ordered online or anyone know if I can buy it in Amsterdam ?

Andy

9th February 2006, 23:51	#11 (permalink)
P6017 New Member Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Join Date: Feb 2005 Location: USA Posts: 83	Re: How long can I leave it in ? Why, as cheap as scrubber material is, would you not just dump it and add fresh. Pete
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10th February 2006, 00:12	#12 (permalink)
Nick uk. Made in England. Current Rebreather/s: Inspiration Classic Azimuth Other Rebreather/s: Azimuth Join Date: Nov 2005 Location: Viale C.Colombo 75 Marina di Carrara. MS 54036 Italy Posts: 579	Re: How long can I leave it in ? Quote: (Originally Posted by E-man) Especially if you just doing pool dives... im sure you'll be fine Oh NOOOOOOOOOOOO, shit, this is just like saying 'GOOD LOOK' to an actor! Or sticking a pork chop round the lion tamers neck. __________________ If it aint broke....don't fix it, and if it is.............well......get another one! divechief2000@hotmail.com
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10th February 2006, 00:56	#13 (permalink)
James Appel New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Jan 2006 Location: Springfield, Oregon Posts: 60	Re: How long can I leave it in ? Quote: (Originally Posted by Nick uk.) Oh NOOOOOOOOOOOO, shit, this is just like saying 'GOOD LOOK' to an actor! Or sticking a pork chop round the lion tamers neck. Im sure everyone has heard about this http://www.cdnn.info/news/safety/s051227.html Just because its in a pool dosnt meen that you cant suffer from some mistake in judgment or equiptment failure
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10th February 2006, 09:25	#14 (permalink)
lizardland Yak Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Classic Kiss Home Build Join Date: Mar 2005 Location: North... Posts: 1,303	Re: How long can I leave it in ? Canadian Forces had DCIEM look at this to improve rebreather diver readiness times by prepping units in advance. They tested both fresh and partially used lime and came up with protocols. Generally speaking with the loop closed and holding pressure then IIRC they could store it for 10days. The report indicated that this storage time could be much longer but the tests ended after 10 days so couldn't authorise any longer periods. __________________ 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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10th February 2006, 13:28	#15 (permalink)
Duncan Price Sump Monster Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Feb 2005 Location: Wells, Somerset, UK Posts: 337	Re: How long can I leave it in ? I left one of my units full all last year - I filled the scrubber in January, did an hour long dive on it in March, another hour in the June and took it to the pool in October for an half hour muck about. Finally, the other week I emptied the scrubber...the loop was sealed in between times.
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11th February 2006, 07:47	#16 (permalink)
*ScubaDadMiami* Moderator Current Rebreather/s: Optima Other Rebreather/s: Join Date: Sep 2005 Location: Florida, USA Posts: 2,138	Re: How long can I leave it in ? "As a rule, you should not leave your filled scrubber canister for long periods. This leads to powdering in the canister resulting from transport. Many units inadequately isolate the absorbant. If you must save absorbant in your canistger, follwin the manufacturer's recommendations for doing so." Mastering Rebreathers (Bozanic 2002), p. 186. Now, this is what the book says. On the other hand, I can't see why keeping the Rebreather from moving about (us Extend Air Cartridge users don't have to worry about that one too much), flushing with oxygen or helium (to assure that there is no atmospheric CO2 in starting a reaction), and then closing the loop on not-yet-activated/pre-breathed scrubber should matter almost in the least. It would seem that one would be able to keep the scrubber in the unit until the expiration of the scrubber like this. Am I missing something here? __________________ Howard Packer IANTD CCR Instructor Miami Beach, Florida CCRDiveTraining.com Last edited by ScubaDadMiami : 11th February 2006 at 16:43.
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11th February 2006, 08:43	#17 (permalink)
ebon.hawk New Member Current Rebreather/s: Dolphin Other Rebreather/s: Dolphin Join Date: May 2005 Location: Hoofddorp, Nederlands Posts: 59	Re: How long can I leave it in ? Quote: (Originally Posted by ScubaDadMiami) "As a rule, you should not leave your filled scrubber canister for long periods. This leads to powdering in the canister resulting from transport. Many units inadequately isolate the absorbant. If you must save absorbant in your canistger, follwin the manufacturer's recommendations for doing so." Mastering Rebreathers (Bozanic 2002), p. 186. After looking at the 10 containers of Dragersorb I need to use up pretty quickly, going to dump the current contents of the scrubber. Can the Mastering Rebreathers book only be ordered online or anyone know if I can buy it in Amsterdam ? Andy Last edited by ebon.hawk : 11th February 2006 at 09:08.
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