Dive canceled, wasted scrubber ?

mriopel · 2nd November 2007, 00:43

Quote: (Originally Posted by diverreb)

It's not only the lack of CO2 passing through the EAC but also the moisture content of the Cartridge that effects it's ability to work. It has to have a certain amount of moisture content to remain active. If it dries out too much then it looses it's ability to do it's job

That's why it is recommended to remove the EAC if it's not being used and reseal it in it's original bag inside the carton then bag the carton for short term storage. Do people leave the EAC in overnight? Sure they do... But for any longer than a day or two, I'd take it out and bag it.

As far as how long to keep it before reuse... I personally won't use it if it's been out longer than a week.... Especially if it's been partially used. It's one less stress point to have to think about during a dive.

Richie

This is what I have been told more than once so I only will use my a week later( if I have more than two hours on it I just put it in the trash and use a new one) and I would say for $25 bucks why take the risk ,hell put in the trash and start over with a new one to be on the safe side.

Mike

n2diving · 2nd November 2007, 23:35

I've talked to a huge number of people about this issue, here is what I observer they are doing...

1) Some people never store or reuse cartridges.
2) Some people will remove from loop and reuse with in a period of a few days to a few weeks.
3) Some people will leave in canister (capped) and leave them there for
a few days to a few weeks.
4) Some people have no problem storing and reusing months later.

The point is.. there is no data one way or another because their is no formal testing (for informal testing see 1-4 above, no body got sick or died).

The only real fear I got from Micropore when I discussed this with them... leaving the cartridge exposed to ambient atmosphere.. not because of CO2, but because the cartridge would dry out. MIcropore deems a drying cartridge to be bad.

Capped and closed, the canister is a more airtight storage vessel than the original packaging because the packaging can never be resealed as it was originally... that foil seal is important.

So... Best practice (according to Micropore) is that the cartridge should be used within 24 hours of opening foil seal, then throw it away. FYI, I am told that US Navy handling for granular absorbent is the same.. if they open a 44lb keg, they are supposed to discard 24 hours later.

Realisticly... a reasonable practice is leave cartridge in the canister with caps on the canister loop fittings (don't rely upon closing the DSV for seal)... use within a few of weeks.

Handling of cartridge for reuse... make it up as you wish, nobody can prove you right or wrong... It's risk vs reward personal decision.

-- Mark

Outlaw · 3rd November 2007, 14:47

Quote: (Originally Posted by n2diving)

I've talked to a huge number of people about this issue, here is what I observer they are doing...

1) Some people never store or reuse cartridges.
2) Some people will remove from loop and reuse with in a period of a few days to a few weeks.
3) Some people will leave in canister (capped) and leave them there for
a few days to a few weeks.
4) Some people have no problem storing and reusing months later.

The point is.. there is no data one way or another because their is no formal testing (for informal testing see 1-4 above, no body got sick or died).

The only real fear I got from Micropore when I discussed this with them... leaving the cartridge exposed to ambient atmosphere.. not because of CO2, but because the cartridge would dry out. MIcropore deems a drying cartridge to be bad.

Capped and closed, the canister is a more airtight storage vessel than the original packaging because the packaging can never be resealed as it was originally... that foil seal is important.

So... Best practice (according to Micropore) is that the cartridge should be used within 24 hours of opening foil seal, then throw it away. FYI, I am told that US Navy handling for granular absorbent is the same.. if they open a 44lb keg, they are supposed to discard 24 hours later.

Realisticly... a reasonable practice is leave cartridge in the canister with caps on the canister loop fittings (don't rely upon closing the DSV for seal)... use within a few of weeks.

Handling of cartridge for reuse... make it up as you wish, nobody can prove you right or wrong... It's risk vs reward personal decision.

-- Mark

Mark,

very nicely put. the more one plays with words in his head, the more

he becomes....

suprised to the fact the US navy divers "throw" the rest of the 20Kg sofno lime....are you sure you read correctly? maybe they mean "throw" it at the back boot of their car and take it home...

Take care

Spyros

Hyper-limits · 3rd November 2007, 16:17

Quote: (Originally Posted by Outlaw)

suprised to the fact the US navy divers "throw" the rest of the 20Kg sofno lime....are you sure you read correctly? maybe they mean "throw" it at the back boot of their car and take it home...

So easy to throw expensive lime away when you not paying for it.
You should see what the Canadian Navy divers throw in the dumpster.

I keep my scrupper seal in a airtight plastic bag for up to 3 weeks.

Al

SimonK · 3rd November 2007, 18:17

Its not for EACs but it is formal testing:

http://cradpdf.drdc.gc.ca/PDFS/zba27/p155544.pdf

Simon

Hanssing · 3rd November 2007, 19:55

Quote: (Originally Posted by SimonK)

Its not for EACs but it is formal testing:

http://cradpdf.drdc.gc.ca/PDFS/zba27/p155544.pdf

Simon

Extremely good post. First time I've seen some hard data on this - have some green.

Nicolai

2nd November 2007, 00:43	#11 (permalink)
mriopel Sadly Missed (RIP) Current Rebreather/s: Optima Dolphin Other Rebreather/s: Dolphin Join Date: Mar 2005 Location: usa Posts: 167	Re: Dive canceled, wasted scrubber ? Quote: (Originally Posted by diverreb) It's not only the lack of CO2 passing through the EAC but also the moisture content of the Cartridge that effects it's ability to work. It has to have a certain amount of moisture content to remain active. If it dries out too much then it looses it's ability to do it's job That's why it is recommended to remove the EAC if it's not being used and reseal it in it's original bag inside the carton then bag the carton for short term storage. Do people leave the EAC in overnight? Sure they do... But for any longer than a day or two, I'd take it out and bag it. As far as how long to keep it before reuse... I personally won't use it if it's been out longer than a week.... Especially if it's been partially used. It's one less stress point to have to think about during a dive. Richie This is what I have been told more than once so I only will use my a week later( if I have more than two hours on it I just put it in the trash and use a new one) and I would say for $25 bucks why take the risk ,hell put in the trash and start over with a new one to be on the safe side. Mike
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2nd November 2007, 23:35	#12 (permalink)
n2diving Custom Title Allowed! Current Rebreather/s: Optima Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Feb 2005 Location: Florida, USA Posts: 271	Re: Dive canceled, wasted scrubber ? I've talked to a huge number of people about this issue, here is what I observer they are doing... 1) Some people never store or reuse cartridges. 2) Some people will remove from loop and reuse with in a period of a few days to a few weeks. 3) Some people will leave in canister (capped) and leave them there for a few days to a few weeks. 4) Some people have no problem storing and reusing months later. The point is.. there is no data one way or another because their is no formal testing (for informal testing see 1-4 above, no body got sick or died). The only real fear I got from Micropore when I discussed this with them... leaving the cartridge exposed to ambient atmosphere.. not because of CO2, but because the cartridge would dry out. MIcropore deems a drying cartridge to be bad. Capped and closed, the canister is a more airtight storage vessel than the original packaging because the packaging can never be resealed as it was originally... that foil seal is important. So... Best practice (according to Micropore) is that the cartridge should be used within 24 hours of opening foil seal, then throw it away. FYI, I am told that US Navy handling for granular absorbent is the same.. if they open a 44lb keg, they are supposed to discard 24 hours later. Realisticly... a reasonable practice is leave cartridge in the canister with caps on the canister loop fittings (don't rely upon closing the DSV for seal)... use within a few of weeks. Handling of cartridge for reuse... make it up as you wish, nobody can prove you right or wrong... It's risk vs reward personal decision. -- Mark
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3rd November 2007, 14:47	#13 (permalink)
Outlaw In search of Law breaking Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2006 Location: Cyprus, Nicosia Posts: 640	Re: Dive canceled, wasted scrubber ? Quote: (Originally Posted by n2diving) I've talked to a huge number of people about this issue, here is what I observer they are doing... 1) Some people never store or reuse cartridges. 2) Some people will remove from loop and reuse with in a period of a few days to a few weeks. 3) Some people will leave in canister (capped) and leave them there for a few days to a few weeks. 4) Some people have no problem storing and reusing months later. The point is.. there is no data one way or another because their is no formal testing (for informal testing see 1-4 above, no body got sick or died). The only real fear I got from Micropore when I discussed this with them... leaving the cartridge exposed to ambient atmosphere.. not because of CO2, but because the cartridge would dry out. MIcropore deems a drying cartridge to be bad. Capped and closed, the canister is a more airtight storage vessel than the original packaging because the packaging can never be resealed as it was originally... that foil seal is important. So... Best practice (according to Micropore) is that the cartridge should be used within 24 hours of opening foil seal, then throw it away. FYI, I am told that US Navy handling for granular absorbent is the same.. if they open a 44lb keg, they are supposed to discard 24 hours later. Realisticly... a reasonable practice is leave cartridge in the canister with caps on the canister loop fittings (don't rely upon closing the DSV for seal)... use within a few of weeks. Handling of cartridge for reuse... make it up as you wish, nobody can prove you right or wrong... It's risk vs reward personal decision. -- Mark Mark, very nicely put. the more one plays with words in his head, the more he becomes.... suprised to the fact the US navy divers "throw" the rest of the 20Kg sofno lime....are you sure you read correctly? maybe they mean "throw" it at the back boot of their car and take it home... Take care Spyros __________________ CMAS - IANTD - TDI Kamikazi Instrustor Trainer DIRRebreather Team Member ---------------------------- "Once an Outlaw, always an Outlaw"
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3rd November 2007, 16:17	#14 (permalink)
Hyper-limits Al Delisle Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Apr 2006 Location: Victoria BC Canada Posts: 141	Re: Dive canceled, wasted scrubber ? Quote: (Originally Posted by Outlaw) suprised to the fact the US navy divers "throw" the rest of the 20Kg sofno lime....are you sure you read correctly? maybe they mean "throw" it at the back boot of their car and take it home... So easy to throw expensive lime away when you not paying for it. You should see what the Canadian Navy divers throw in the dumpster. I keep my scrupper seal in a airtight plastic bag for up to 3 weeks. Al __________________ "The oldest and strongest emotion of mankind is fear. And the oldest and strongest kind of fear is fear of the unknown" H.P. Lovecraft
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3rd November 2007, 18:17	#15 (permalink)
SimonK Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Oct 2005 Location: Cumbria UK Posts: 231	Re: Dive canceled, wasted scrubber ? Its not for EACs but it is formal testing: http://cradpdf.drdc.gc.ca/PDFS/zba27/p155544.pdf Simon
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3rd November 2007, 19:55	#16 (permalink)
Hanssing flap-flop ..... flap-flop Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Denmark Posts: 406	Re: Dive canceled, wasted scrubber ? Quote: (Originally Posted by SimonK) Its not for EACs but it is formal testing: http://cradpdf.drdc.gc.ca/PDFS/zba27/p155544.pdf Simon Extremely good post. First time I've seen some hard data on this - have some green. Nicolai __________________ Woohooo - I can change my rEvo! Its going to be bitchin' tricked out piece of gear
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