Meg Radial Scrubber Test report

***schford*** · 21st August 2006, 17:22

Now Now people no

or

Lol - but seriously THE reason why the Meg Radial scrubber is good is that it has a LOT of sorb. For me as I am quite dumb the biggest factor in scrubber architecture is size of the sorb.

We have seen all sorts from straight axial to donut axial to radial in to out and out to in not to mention the Sport Kisses funky square and they all work!

Now lets all move past the Evangelical stage of our steps to Rebreather Enightenment! and concentrate on whats important

<-- ye thats right OC bashing :-)

dive2dive2000 · 21st August 2006, 17:36

Quote: (Originally Posted by paulraymaekers)

can anyone explain that to me??

regards
paul

Volume & dwell time

In to out gas enters into smaller area of scrubber exits into larger area, covers larger percentage of material with a longer dwell time. Out to in gas enters a larger area first then exits from a smaller area it will leave faster and will cover less of an area greater chance of channelling. Axil scrubbers and Radial scrubbers both have pros and cons and both are designed for specific gas flow patterns These were invented long before Peter,and Leon. Radail scrubbers were designed to flow in to out period. If this data is wrong please some one post why.

dive2dive2000 · 21st August 2006, 17:38

Quote: (Originally Posted by schford)

Now Now people no

or

Lol - but seriously THE reason why the Meg Radial scrubber is good is that it has a LOT of sorb. For me as I am quite dumb the biggest factor in scrubber architecture is size of the sorb.

We have seen all sorts from straight axial to donut axial to radial in to out and out to in not to mention the Sport Kisses funky square and they all work!

Now lets all move past the Evangelical stage of our steps to Rebreather Enightenment! and concentrate on whats important

<-- ye thats right OC bashing :-)

Thank you Stuart now that answer makes sence to me

rogeringebo · 21st August 2006, 17:51

I have heard that the radial scrubber might be part of the "facelift" that is coming with the APECS 3 Megalodon.....is it possible that ISC have a few more secret news on the "new" MEG or is it the usual one with upgraded electronics including deco info and radial scrubber sold as a option?
Have you guys heard any rumours?

Cheers
Rodge

paulraymaekers · 21st August 2006, 19:53

Quote: (Originally Posted by dive2dive2000)

Volume & dwell time

the question was more to: why a difference in WOB if you compare in-to-out versus out to in!

conc dwell time, we had this discussion over and over... dwell time only depends on volume, not on form or flow direction!

regards
paul

paulraymaekers · 21st August 2006, 19:56

Quote: (Originally Posted by dive2dive2000)

Out to in gas enters a larger area first then exits from a smaller area it will leave faster and will cover less of an area greater chance of channelling.

???? how could this depend on flow direction ?????

paul

**trob09** · 21st August 2006, 20:47

Quote: (Originally Posted by viscya)

I'm sorry guys, but how small do you want that thing? As it is, it's 6" too short for me. Make it smaller, and I'll have to strap it onto my hood. I'd rather have a tall thin unit that is hydrodynamic than a short hump on my back. Call me Igor.

Funny, I almost posted the same thing. of course a thinner, more hydrodynamic unit means an all-new unit, not just a shorter can and scrubber.

I don't see that happening.

dive2dive2000 · 21st August 2006, 21:16

[quote=paulraymaekers]the question was more to: why a difference in WOB if you compare in-to-out versus out to in!

Wob???? I do not know the answer, or if that statement is true or false

conc dwell time, we had this discussion over and over... dwell time only depends on volume, not on form or flow direction!

Yes I totally agreee 150%, but GAS FLOW PREDETERMINS VOLUME IN A RADAIL SCRUBBER!!!!!!!

Depending on which way the gas flows in a PRISM will determin which side of the chamber the gas hits first the large side or the small side and then that can and will change speed, preasure, and gas volume on exit of scrubber. This is 7th grade science you take a screen roll it up into a tube 2" in dia by 12" long place in center of 5 gl pail fill pail with sand or small pebbles, now pour water in center of screen it will fill to top and then start to leave thru all area of sand (path of least resistance). now start over with dry sand/pebbles and pour water into sand part of pail tell me how much sand gets wet and which part. now scale down and do same experiment with a radial scrubber. Gas flow does play a roll in the way a radial scrubber operates as far as scrubbing is concerned.

Now lets put all of this in perspective Prism scrubber 6lbs gas flow in to out

Meg scrubber 8lbs gas flow out to in, get the picture, everything is relitive.

This is my interpertation of gas flow, volume, and scrubber design.
Sorry for the

Just a little PO

Like Stuart said

that is all that should matter

***EBT*** · 21st August 2006, 21:27

Maybe its my low IQ and general idiocy, but I fail to see how out/in vs in/out makes a difference to scrubber duration. The only difference I'd expect to see would be that the out/in flow would breakthrough at a much steeper curve than in/out.

Perhaps one of our experts could explain?

paulraymaekers · 21st August 2006, 21:37

Quote: (Originally Posted by EBT)

Maybe its my low IQ and general idiocy, but I fail to see how out/in vs in/out makes a difference to scrubber duration. The only difference I'd expect to see would be that the out/in flow would breakthrough at a much steeper curve than in/out.

Perhaps one of our experts could explain?

I promised myself not to get dragged into this again.....

You're 100% right!!, and you don't need a high IQ to see this

simply put: if you neglect possible temperature effects (isolation, cooling down gas on walls etc)(and only because of that, worse sorb use), there is no difference at all between in-out and out-in, between radial and axial, donut and whatever,

all that counts then is the amount of sorb you have in your system, that there is no channeling (equal use of the sorb) and that the gas goes trough the whole scrubber-bed (uniformal scrubber, not like the SK)

paul

21st August 2006, 17:22	#41 (permalink)
*schford* RBW Founder Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: UK Posts: 3,564	Re: Meg Radial Scrubber Test report Now Now people no or Lol - but seriously THE reason why the Meg Radial scrubber is good is that it has a LOT of sorb. For me as I am quite dumb the biggest factor in scrubber architecture is size of the sorb. We have seen all sorts from straight axial to donut axial to radial in to out and out to in not to mention the Sport Kisses funky square and they all work! Now lets all move past the Evangelical stage of our steps to Rebreather Enightenment! and concentrate on whats important <-- ye thats right OC bashing :-) __________________ 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 RBW is subject to the Rebreather World Terms & Conditions of Use
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21st August 2006, 17:36	#42 (permalink)
dive2dive2000 PRISM DIVER & LUVIN IT! Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Long Island, NY Posts: 796	Re: Meg Radial Scrubber Test report Quote: (Originally Posted by paulraymaekers) can anyone explain that to me?? regards paul Volume & dwell time In to out gas enters into smaller area of scrubber exits into larger area, covers larger percentage of material with a longer dwell time. Out to in gas enters a larger area first then exits from a smaller area it will leave faster and will cover less of an area greater chance of channelling. Axil scrubbers and Radial scrubbers both have pros and cons and both are designed for specific gas flow patterns These were invented long before Peter,and Leon. Radail scrubbers were designed to flow in to out period. If this data is wrong please some one post why. __________________ Safe Diving, Martin
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21st August 2006, 17:38	#43 (permalink)
dive2dive2000 PRISM DIVER & LUVIN IT! Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Long Island, NY Posts: 796	Re: Meg Radial Scrubber Test report Quote: (Originally Posted by schford) Now Now people no or Lol - but seriously THE reason why the Meg Radial scrubber is good is that it has a LOT of sorb. For me as I am quite dumb the biggest factor in scrubber architecture is size of the sorb. We have seen all sorts from straight axial to donut axial to radial in to out and out to in not to mention the Sport Kisses funky square and they all work! Now lets all move past the Evangelical stage of our steps to Rebreather Enightenment! and concentrate on whats important <-- ye thats right OC bashing :-) Thank you Stuart now that answer makes sence to me __________________ Safe Diving, Martin
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21st August 2006, 17:51	#44 (permalink)
rogeringebo Life starts at 100 Current Rebreather/s: Pelagian Other Rebreather/s: Megalodon Classic Kiss Pelagian Join Date: Sep 2005 Location: Stockholm Sweden Posts: 739	Re: Meg Radial Scrubber Test report I have heard that the radial scrubber might be part of the "facelift" that is coming with the APECS 3 Megalodon.....is it possible that ISC have a few more secret news on the "new" MEG or is it the usual one with upgraded electronics including deco info and radial scrubber sold as a option? Have you guys heard any rumours? Cheers Rodge __________________ Life starts at 100
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21st August 2006, 19:53	#45 (permalink)
paulraymaekers rEvo's daddy Current Rebreather/s: rEvo Other CCR Home Build Other Rebreather/s: rEvo Other CCR Home Build Join Date: May 2005 Location: belgium Posts: 1,638	Re: Meg Radial Scrubber Test report Quote: (Originally Posted by dive2dive2000) Volume & dwell time the question was more to: why a difference in WOB if you compare in-to-out versus out to in! conc dwell time, we had this discussion over and over... dwell time only depends on volume, not on form or flow direction! regards paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
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21st August 2006, 19:56	#46 (permalink)
paulraymaekers rEvo's daddy Current Rebreather/s: rEvo Other CCR Home Build Other Rebreather/s: rEvo Other CCR Home Build Join Date: May 2005 Location: belgium Posts: 1,638	Re: Meg Radial Scrubber Test report Quote: (Originally Posted by dive2dive2000) Out to in gas enters a larger area first then exits from a smaller area it will leave faster and will cover less of an area *greater chance of channelling*. ???? how could this depend on flow direction ????? paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
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21st August 2006, 20:47	#47 (permalink)
trob09 . Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Feb 2005 Posts: 701	Re: Meg Radial Scrubber Test report Quote: (Originally Posted by viscya) I'm sorry guys, but how small do you want that thing? As it is, it's 6" too short for me. Make it smaller, and I'll have to strap it onto my hood. I'd rather have a tall thin unit that is hydrodynamic than a short hump on my back. Call me Igor. Funny, I almost posted the same thing. of course a thinner, more hydrodynamic unit means an all-new unit, not just a shorter can and scrubber. I don't see that happening.
(Offline)

21st August 2006, 21:16	#48 (permalink)
dive2dive2000 PRISM DIVER & LUVIN IT! Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Long Island, NY Posts: 796	Re: Meg Radial Scrubber Test report [quote=paulraymaekers]the question was more to: why a difference in WOB if you compare in-to-out versus out to in! Wob???? I do not know the answer, or if that statement is true or false conc dwell time, we had this discussion over and over... dwell time only depends on volume, not on form or flow direction! Yes I totally agreee 150%, but GAS FLOW PREDETERMINS VOLUME IN A RADAIL SCRUBBER!!!!!!! Depending on which way the gas flows in a PRISM will determin which side of the chamber the gas hits first the large side or the small side and then that can and will change speed, preasure, and gas volume on exit of scrubber. This is 7th grade science you take a screen roll it up into a tube 2" in dia by 12" long place in center of 5 gl pail fill pail with sand or small pebbles, now pour water in center of screen it will fill to top and then start to leave thru all area of sand (path of least resistance). now start over with dry sand/pebbles and pour water into sand part of pail tell me how much sand gets wet and which part. now scale down and do same experiment with a radial scrubber. Gas flow does play a roll in the way a radial scrubber operates as far as scrubbing is concerned. Now lets put all of this in perspective Prism scrubber 6lbs gas flow in to out Meg scrubber 8lbs gas flow out to in, get the picture, everything is relitive. This is my interpertation of gas flow, volume, and scrubber design. Sorry for the Just a little PO Like Stuart said that is all that should matter __________________ Safe Diving, Martin
(Offline)

21st August 2006, 21:27	#49 (permalink)
*EBT* Apprentice Luddite Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: UK, Brighton Posts: 2,111	Re: Meg Radial Scrubber Test report Maybe its my low IQ and general idiocy, but I fail to see how out/in vs in/out makes a difference to scrubber duration. The only difference I'd expect to see would be that the out/in flow would breakthrough at a much steeper curve than in/out. Perhaps one of our experts could explain? __________________ Eagles May Soar, but weasels don't get sucked into jet engines! RBW Terms of service
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21st August 2006, 21:37	#50 (permalink)
paulraymaekers rEvo's daddy Current Rebreather/s: rEvo Other CCR Home Build Other Rebreather/s: rEvo Other CCR Home Build Join Date: May 2005 Location: belgium Posts: 1,638	Re: Meg Radial Scrubber Test report Quote: (Originally Posted by EBT) Maybe its my low IQ and general idiocy, but I fail to see how out/in vs in/out makes a difference to scrubber duration. The only difference I'd expect to see would be that the out/in flow would breakthrough at a much steeper curve than in/out. Perhaps one of our experts could explain? I promised myself not to get dragged into this again..... You're 100% right!!, and you don't need a high IQ to see this simply put: if you neglect possible temperature effects (isolation, cooling down gas on walls etc)(and only because of that, worse sorb use), there is no difference at all between in-out and out-in, between radial and axial, donut and whatever, all that counts then is the amount of sorb you have in your system, that there is no channeling (equal use of the sorb) and that the gas goes trough the whole scrubber-bed (uniformal scrubber, not like the SK) paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
(Offline)

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