How tight are you packing?

James Appel · 12th February 2006, 15:10

I had a question on just how tight is everyone packing there scrubber (and yes I asked this question in my class, and it was answered, but was just wondering how others are doing it).
I realise that the tighter I pack it, the less chance there will be of channeling, but it also seems that there will be a point of diminishing returns,where the increase of WOB will out weigh the benefit of tighter packing.

***schford*** · 12th February 2006, 15:29

I guess its subjective - I pack mine nice and full so that it needs a good shove to get closed

diverrob · 12th February 2006, 15:32

Tight is good but I believe there is a point where you can get it too tight. The most important thing IMHO is consistency throughout the basket. If you over pack you can run into the risk of breaking down the granules of lime into dust. I have seen this happen with some of my students who get over zealous with packing in as much as possible. With our Rebreather (SIVA, SIVA+) if you over pack the basket you can damage the basket or stretch the nylon mesh in the basket.

Rob

Juz · 12th February 2006, 15:46

I pack it VERY tight.

WOB just does not seem to be an issue.

It's on an Inspo.

Juz

bubnotbub · 12th February 2006, 15:55

I pack Medium tight for 1-2,5 sofnolime, Very tigth for 3-5 sofnolime and Draeger Sorb.

Best

Aldo

Quote: (Originally Posted by Juz)

I pack it VERY tight.

WOB just does not seem to be an issue.

It's on an Inspo.

Juz

***caveseeker7*** · 12th February 2006, 17:00

Quite tight as the PRISM only has foam pads rather than a spring loaded lid.
As tight as I can get it without damaging the basket, the foam pads don't allow much leeway.

Channelling is a serious issue that must be avoided, rather than packing sorb too loosely and risking that I would switch to a larger grain sorb and adjust my dive duration.

**nigelh** · 12th February 2006, 17:15

Quote: (Originally Posted by James Appel)

I had a question on just how tight is everyone packing there scrubber

Thump thump thump.
Pat pat pat.
When it stops going down I stop trying to make it go down.

I followed BAD Internet advice once and loose filled it, settled it and dived.
It channelled after two and a bit hours.
I have never felt so out of control in my life.

See most threads on 'why you have an ADV?' etc.
I won't retell the story again.

ROB DAVIE · 12th February 2006, 17:20

Folks,

Since there is no objective measurement of how the scrubber is packed, I tell my students, and pack my own (Inspo) "firmly".

I pour a third, rotate it while slapping the side of the scrubber, then repeat, and repeat again.

How firm is "firm"?? Well settled, solid but not jammed...hard to describe, but easy to demonstrate.

And no, there is no "mysticism" involved. No set number of pats or rotations. Just good judgement.

***Decodiver*** · 12th February 2006, 18:05

I like my scrubbers to be tight! Ha ha ha!

Seriously, I pack it as tight as I can.

Cheers,

Dave Cooper.

iani · 12th February 2006, 18:35

I fill with lime then use the supplied tool to level it off, the spring loaded lid then tamps it down, far better than the tap, tap, tap I used to have to do with the YBOD.

Ian

12th February 2006, 15:10	#1 (permalink)
James Appel New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Jan 2006 Location: Springfield, Oregon Posts: 60	How tight are you packing? I had a question on just how tight is everyone packing there scrubber (and yes I asked this question in my class, and it was answered, but was just wondering how others are doing it). I realise that the tighter I pack it, the less chance there will be of channeling, but it also seems that there will be a point of diminishing returns,where the increase of WOB will out weigh the benefit of tighter packing.
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12th February 2006, 15:29	#2 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,661	Re: How tight are you packing? I guess its subjective - I pack mine nice and full so that it needs a good shove to get closed __________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of Rebreather World is subject to the Rebreather World Terms & Conditions of Use
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12th February 2006, 15:32	#3 (permalink)
diverrob The Evolution of Diving Current Rebreather/s: Evolution Other SCR Other Rebreather/s: Not Bought Yet Other SCR Join Date: May 2005 Location: Victoria BC Canada Posts: 315	Re: How tight are you packing? Tight is good but I believe there is a point where you can get it too tight. The most important thing IMHO is consistency throughout the basket. If you over pack you can run into the risk of breaking down the granules of lime into dust. I have seen this happen with some of my students who get over zealous with packing in as much as possible. With our Rebreather (SIVA, SIVA+) if you over pack the basket you can damage the basket or stretch the nylon mesh in the basket. Rob
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12th February 2006, 15:46	#4 (permalink)
Juz Team Kinky Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: London UK Posts: 146	Re: How tight are you packing? I pack it VERY tight. WOB just does not seem to be an issue. It's on an Inspo. Juz __________________ ~KINKY DIVERS~ Because going down is fun We are all prompted by the same motives, all deceived by the same fallacies, all animated by hope, obstructed by danger, entangled by desire and seduced by pleasure. Welcome to Kinky Divers!
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12th February 2006, 15:55	#5 (permalink)
bubnotbub Silent diver Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Megalodon Ouroboros rEvo Other CCR Other Rebreather/s: Inspiration Classic Sport Kiss rEvo Other CCR Join Date: Sep 2005 Location: France Italy Posts: 383	Re: How tight are you packing? I pack Medium tight for 1-2,5 sofnolime, Very tigth for 3-5 sofnolime and Draeger Sorb. Best Aldo Quote: (Originally Posted by Juz) I pack it VERY tight. WOB just does not seem to be an issue. It's on an Inspo. Juz __________________ Aldo Ferrucci *Trimix and Rebreather IT* *Expedition Leader* *www.bubnotbub.com* I like bubbles only in my glass of Champagne
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12th February 2006, 17:00	#6 (permalink)
*caveseeker7* Who loves ya, baby Current Rebreather/s: Sport Kiss Other Rebreather/s: Prism Topaz Join Date: Jan 2005 Location: Too far from Neverland Posts: 5,286	Re: How tight are you packing? Quite tight as the PRISM only has foam pads rather than a spring loaded lid. As tight as I can get it without damaging the basket, the foam pads don't allow much leeway. Channelling is a serious issue that must be avoided, rather than packing sorb too loosely and risking that I would switch to a larger grain sorb and adjust my dive duration. __________________ Cheers Stefan Be Water, My Friend - Bruce Lee Sponsor Lou in Race For Life!
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12th February 2006, 17:15	#7 (permalink)
nigelh New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 786	Re: How tight are you packing? Quote: (Originally Posted by James Appel) I had a question on just how tight is everyone packing there scrubber Thump thump thump. Pat pat pat. When it stops going down I stop trying to make it go down. I followed BAD Internet advice once and loose filled it, settled it and dived. It channelled after two and a bit hours. I have never felt so out of control in my life. See most threads on 'why you have an ADV?' etc. I won't retell the story again. __________________ nigelh
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12th February 2006, 17:20	#8 (permalink)
ROB DAVIE Administrator Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: HOUSTON, REPUBLIC OF TEJAS Posts: 1,120	Re: How tight are you packing? Folks, Since there is no objective measurement of how the scrubber is packed, I tell my students, and pack my own (Inspo) "firmly". I pour a third, rotate it while slapping the side of the scrubber, then repeat, and repeat again. How firm is "firm"?? Well settled, solid but not jammed...hard to describe, but easy to demonstrate. And no, there is no "mysticism" involved. No set number of pats or rotations. Just good judgement. __________________ [SIZE=2]"CC Rebreathers will become a viable part of tech diving [U]WHEN PIGS FLY[/U]!!"--GI3[/SIZE]
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12th February 2006, 18:05	#9 (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: How tight are you packing? I like my scrubbers to be tight! Ha ha ha! Seriously, I pack it as tight as I can. Cheers, Dave Cooper. __________________ 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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12th February 2006, 18:35	#10 (permalink)
iani Nefarious Activist Current Rebreather/s: Ouroboros Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: Middlesex, UK Posts: 334	Re: How tight are you packing? I fill with lime then use the supplied tool to level it off, the spring loaded lid then tamps it down, far better than the tap, tap, tap I used to have to do with the YBOD. Ian
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