Sealing Hydrophobic membrane to canister

Frankie Pellegrino · 2nd February 2007, 12:24

Dear List,
I’m sure some of you all ready made this modification …….but if you didn’t I think it’s a good idea. I sandwiched some 1/16th inch o-ring cord between the canister body and the hydrophobic membrane. The benefits are obvious. I did this on the top and bottom to make it more Hydrophobic in case of a loop flood. I like using o-ring cord instead of RTV or silicone. This makes the canister much easier to take apart in the future for cleaning. (It isn't glued together) Make sure you sandwich the o-ring cord in the side like the picture shows. You don't want to put the o-ring in the groove under or on top of the membrane. It will make the canister taller. CCR designed the canister a certain height and you don't want to change that!

Cheers Frankie

P.S. I'm not 100% sure, but I think the factory installs the membrane with silicone. Best to ask Al or Jason.

delidiver · 2nd February 2007, 17:47

Frankie,
You are the man!

Looking forward to the upcoming season.

Louis

DrJM · 2nd February 2007, 17:54

Great idea Frankie ! but I much prefer when you explain your ideas using your girlfriend

Cheers

Jerome (who will give it a try next week)

Fort Collins Bob · 2nd February 2007, 22:34

Quote: (Originally Posted by DrJM)

Great idea Frankie ! but I much prefer when you explain your ideas using your girlfriend

Yes, perhaps an assembly video would help !!

Explorer · 2nd February 2007, 22:35

Quote: (Originally Posted by Fort Collins Bob)

Yes, perhaps an assembly video would help !!

Pictures are ok for now.......

Frankie Pellegrino · 4th February 2007, 10:27

All right men!
If there is another Frocination to my Boris, I'll be sure to have my girl friend model it. I'm a team player and I want to make the rebreather guys happy. I'm glad you like the idea.

Cheers Frankie

Drmike · 4th February 2007, 11:27

Been using this method since I bought the membrane and found out it didnt make the scrubber hydrophobic!

I joined the ends of the o-ring toghether (to form a ring) with a drop of superglue.

I suggested to the factory they put a flat rubber 'o-ring' into the bottom of the groves that hold the membrane as that would be a proper fix. But heard they are using silicon.

I didnt like the idea of gluing the membrane in.

**fireman** · 4th February 2007, 12:38

What is the membrane made of and who makes it?

Drmike · 4th February 2007, 14:08

Quote: (Originally Posted by fireman)

What is the membrane made of and who makes it?

its porex

Frankie Pellegrino · 5th February 2007, 12:33

Quote: (Originally Posted by Drmike)

Been using this method since I bought the membrane and found out it didnt make the scrubber hydrophobic!

I suggested to the factory they put a flat rubber 'o-ring' into the bottom of the groves that hold the membrane as that would be a proper fix. But heard they are using silicon.

I didnt like the idea of gluing the membrane in.

Mike I'm not sure I understand what your writing. (so please correct me if I'm wrong)
If a flat o-ring was sandwiched on the top and bottom of the membrane it isn't making any more of a seal then if it's sandwiched on the side's . The porex is very hydrophobic not water proof. In my opinion the o-ring or silicone would only stop a easy water flow under or over the membrane regardless of were it's installed. So if water got into the loop you wouldn't get a caustic drink from the inhalation side of the kit. Then you can clear the water from the exhalation counter lung. We agree the canister will work with a good amount of water in it. And that if it was flooded you could recover and stay on the loop. (WOB wouldn't be the best or if it came through the exhalation side

thats another problem) What I'm not understanding is if you installed a flat o-ring like you stated it wouldn't make any difference then if it was installed on the side of the membrane.
Cheers Frankie

2nd February 2007, 12:24	#1 (permalink)
Frankie Pellegrino Custom Title Allowed! Current Rebreather/s: Classic Kiss Ouroboros Other Rebreather/s: Inspiration Classic Join Date: Jan 2006 Location: NYC New York Posts: 133	Sealing Hydrophobic membrane to canister Dear List, I’m sure some of you all ready made this modification …….but if you didn’t I think it’s a good idea. I sandwiched some 1/16th inch o-ring cord between the canister body and the hydrophobic membrane. The benefits are obvious. I did this on the top and bottom to make it more Hydrophobic in case of a loop flood. I like using o-ring cord instead of RTV or silicone. This makes the canister much easier to take apart in the future for cleaning. (It isn't glued together) Make sure you sandwich the o-ring cord in the side like the picture shows. You don't want to put the o-ring in the groove under or on top of the membrane. It will make the canister taller. CCR designed the canister a certain height and you don't want to change that! Cheers Frankie P.S. I'm not 100% sure, but I think the factory installs the membrane with silicone. Best to ask Al or Jason. Last edited by Frankie Pellegrino : 31st October 2007 at 00:59.
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2nd February 2007, 17:47	#2 (permalink)
delidiver DELIDIVER Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Jun 2005 Location: Merion, PA USA Posts: 47	Re: Sealing Hydrophobic membrane to canister Frankie, You are the man! Looking forward to the upcoming season. Louis __________________ Dive Safe & Dive Often!
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2nd February 2007, 17:54	#3 (permalink)
DrJM Deep Cave Explorer Current Rebreather/s: Ouroboros Other Rebreather/s: MK 15.X Join Date: May 2005 Location: France Posts: 335	Re: Sealing Hydrophobic membrane to canister Great idea Frankie ! but I much prefer when you explain your ideas using your girlfriend Cheers Jerome (who will give it a try next week) __________________ www.snoopyloop.com Deep Cave Exploration
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2nd February 2007, 22:34	#4 (permalink)
Fort Collins Bob Custom Title Allowed! Current Rebreather/s: Ouroboros Other Rebreather/s: Join Date: Apr 2006 Location: Fort Collins Colorado Posts: 111	Re: Sealing Hydrophobic membrane to canister Quote: (Originally Posted by DrJM) Great idea Frankie ! but I much prefer when you explain your ideas using your girlfriend Yes, perhaps an assembly video would help !! __________________ Best Regards all ------------------------------------------- Bob Fridell Ouroboros #46 Fort Collins, Colorado
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2nd February 2007, 22:35	#5 (permalink)
Explorer Be vewy vewy quiet.... Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Alberta, Canada Posts: 748	Re: Sealing Hydrophobic membrane to canister Quote: (Originally Posted by Fort Collins Bob) Yes, perhaps an assembly video would help !! Pictures are ok for now....... __________________ TRAIN WRECKED.....
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4th February 2007, 10:27	#6 (permalink)
Frankie Pellegrino Custom Title Allowed! Current Rebreather/s: Classic Kiss Ouroboros Other Rebreather/s: Inspiration Classic Join Date: Jan 2006 Location: NYC New York Posts: 133	Re: Sealing Hydrophobic membrane to canister All right men! If there is another Frocination to my Boris, I'll be sure to have my girl friend model it. I'm a team player and I want to make the rebreather guys happy. I'm glad you like the idea. Cheers Frankie
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4th February 2007, 11:27	#7 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,062	Re: Sealing Hydrophobic membrane to canister Been using this method since I bought the membrane and found out it didnt make the scrubber hydrophobic! I joined the ends of the o-ring toghether (to form a ring) with a drop of superglue. I suggested to the factory they put a flat rubber 'o-ring' into the bottom of the groves that hold the membrane as that would be a proper fix. But heard they are using silicon. I didnt like the idea of gluing the membrane in. __________________ Get a girlfriend you sad twat - a Rebreather is an unfaithful mistress - dont blind yourself to her faults just because she goes down on you
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4th February 2007, 12:38	#8 (permalink)
fireman rEvo combat swimmer Current Rebreather/s: rEvo Other CCR Other Rebreather/s: rEvo Other CCR Join Date: Nov 2006 Location: chicago Posts: 420	Re: Sealing Hydrophobic membrane to canister What is the membrane made of and who makes it?
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4th February 2007, 14:08	#9 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,062	Re: Sealing Hydrophobic membrane to canister Quote: (Originally Posted by fireman) What is the membrane made of and who makes it? its porex __________________ Get a girlfriend you sad twat - a Rebreather is an unfaithful mistress - dont blind yourself to her faults just because she goes down on you
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5th February 2007, 12:33	#10 (permalink)
Frankie Pellegrino Custom Title Allowed! Current Rebreather/s: Classic Kiss Ouroboros Other Rebreather/s: Inspiration Classic Join Date: Jan 2006 Location: NYC New York Posts: 133	Re: Sealing Hydrophobic membrane to canister Quote: (Originally Posted by Drmike) Been using this method since I bought the membrane and found out it didnt make the scrubber hydrophobic! I suggested to the factory they put a flat rubber 'o-ring' into the bottom of the groves that hold the membrane as that would be a proper fix. But heard they are using silicon. I didnt like the idea of gluing the membrane in. Mike I'm not sure I understand what your writing. (so please correct me if I'm wrong) If a flat o-ring was sandwiched on the top and bottom of the membrane it isn't making any more of a seal then if it's sandwiched on the side's . The porex is very hydrophobic not water proof. In my opinion the o-ring or silicone would only stop a easy water flow under or over the membrane regardless of were it's installed. So if water got into the loop you wouldn't get a caustic drink from the inhalation side of the kit. Then you can clear the water from the exhalation counter lung. We agree the canister will work with a good amount of water in it. And that if it was flooded you could recover and stay on the loop. (WOB wouldn't be the best or if it came through the exhalation side thats another problem) What I'm not understanding is if you installed a flat o-ring like you stated it wouldn't make any difference then if it was installed on the side of the membrane. Cheers Frankie
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