Partial Flood on the rEvo

divernate · 20th June 2008, 01:26

Let me first start off by saying the rEvo is a pleasure to dive and I'm super happy with it. Today my rEvo was partially flooded at 100fsw. I got a mouth full of saltwater with no cocktail. I bailed out and continued my ascend and tried the loop again around 40fsw. By now I worked all the water back to the bottom of the inhalation lung and was able to regain the loop for the rest of the ascent. Back at the jeep, I was astonished to find that the inhalation scrubber looked like a slurpie! There was white residue on all of the sealing surfaces as well as a pint of saltwater in the inhalation lung(my chamois just couldn't absorb it all!). Upon further investigation, the center posts on both sorb cassettes were adjusted in a way which made them too tall. My cover sealed before and I was able to pull a neg. just fine, but once we adjusted the posts on the cassettes so that they matched the other rEvos in the shop, the cover sealed much easier and the neg. was a lot crisper. Just thought I'd throw this out there! Check to make sure your posts are not preventing the lid from COMPLETELY sealing!!! My lid looked normal until you got real close. I dived it for 7 hours with no problem, so, check those lids!!!

zoo_diver · 20th June 2008, 01:51

Quote: (Originally Posted by divernate)

Let me first start off by saying the rEvo is a pleasure to dive and I'm super happy with it. Today my rEvo was partially flooded at 100fsw. I got a mouth full of saltwater with no cocktail. I bailed out and continued my ascend and tried the loop again around 40fsw. By now I worked all the water back to the bottom of the inhalation lung and was able to regain the loop for the rest of the ascent. Back at the jeep, I was astonished to find that the inhalation scrubber looked like a slurpie! There was white residue on all of the sealing surfaces as well as a pint of saltwater in the inhalation lung(my chamois just couldn't absorb it all!). Upon further investigation, the center posts on both sorb cassettes were adjusted in a way which made them too tall. My cover sealed before and I was able to pull a neg. just fine, but once we adjusted the posts on the cassettes so that they matched the other rEvos in the shop, the cover sealed much easier and the neg. was a lot crisper. Just thought I'd throw this out there! Check to make sure your posts are not preventing the lid from COMPLETELY sealing!!! My lid looked normal until you got real close. I dived it for 7 hours with no problem, so, check those lids!!!

interesting that you were still able to pull a negative. i am not familiar with the revo but you are dawg-on lucky that your mouth full of water wasn't a cocktail!

glad that everything worked out okay.

paulraymaekers · 20th June 2008, 05:21

Quote: (Originally Posted by divernate)

Let me first start off by saying the rEvo is a pleasure to dive and I'm super happy with it. Today my rEvo was partially flooded at 100fsw. I got a mouth full of saltwater with no cocktail. I bailed out and continued my ascend and tried the loop again around 40fsw. By now I worked all the water back to the bottom of the inhalation lung and was able to regain the loop for the rest of the ascent. Back at the jeep, I was astonished to find that the inhalation scrubber looked like a slurpie! There was white residue on all of the sealing surfaces as well as a pint of saltwater in the inhalation lung(my chamois just couldn't absorb it all!). Upon further investigation, the center posts on both sorb cassettes were adjusted in a way which made them too tall. My cover sealed before and I was able to pull a neg. just fine, but once we adjusted the posts on the cassettes so that they matched the other rEvos in the shop, the cover sealed much easier and the neg. was a lot crisper. Just thought I'd throw this out there! Check to make sure your posts are not preventing the lid from COMPLETELY sealing!!! My lid looked normal until you got real close. I dived it for 7 hours with no problem, so, check those lids!!!

hello Nate, I can't understand where the problem came from: what do you mean by 'the posts on the casettes' ?

paul

divernate · 20th June 2008, 05:33

Quote: (Originally Posted by paulraymaekers)

hello Nate, I can't understand where the problem came from: what do you mean by 'the posts on the casettes' ?

paul

the threaded rod that is in the center of each cassette (scrubber canisters) was adjusted so it was sticking too high and preventing the lid from sealing completely at the top and bottom of the lid. Robin undid the two nuts that secure the rod and measured another cassette and adjusted mine to the same height. The lid secures super nicely now. What's weird is that I have had no problem pulling a neg. and have dived your rEvo for 7 hours without incident! Anyways, I'm still here and still really happy with the unit. I'll be taking it back out tomorrow for a 120min dive, so I'll respond with my results!

**kybrt** · 20th June 2008, 14:45

paul,

he means the nut on the bottom of the cassettes, if i remember you had to adjust mine, you said 1mm below the bottom and no more and to watch for the cassettes not seating fully.<?>

i got the latest revo flash and will be sending you a note soon.

marv

paulraymaekers · 20th June 2008, 15:10

Quote: (Originally Posted by divernate)

the threaded rod that is in the center of each cassette (scrubber canisters) was adjusted so it was sticking too high and preventing the lid from sealing completely at the top and bottom of the lid. Robin undid the two nuts that secure the rod and measured another cassette and adjusted mine to the same height. The lid secures super nicely now. What's weird is that I have had no problem pulling a neg. and have dived your rEvo for 7 hours without incident! Anyways, I'm still here and still really happy with the unit. I'll be taking it back out tomorrow for a 120min dive, so I'll respond with my results!

ok, I see... but I have doubths that that was the reason

normally water in the inhale, but not very caustic, meaning it did not pass the canister, is either a leak in the inhale hose, or a leaking OPV

salt or a smal grain of sand, in the membrane of the OPV, means slowly leaking water inside

that's why we advice, when rincing the lungs (cell grid out, water in lung), push the OPV (or pull if it's a mini) a few times so water flows trough the OPV and takes away any dirt that would have accumulated there

give it a try Nad :-)

regards

paul

Hanssing · 20th June 2008, 15:17

Pheew, one of my fears - a caustic. Glad youre well and not scared off.

I on purpose go heads down once in a while and breathe in very carefully to try and catch any flooding before it surprises me.
Have never had one yet :-)

I do however allways have a very wet moisture pad, but its allways fresh-water so its form the sorb-reaction and condensation. It may sound weird but I allways carefully taste the water from each lung to detect any salt-traces. Again none yet.

Get back on the rig, and enjoy.

Nicolai

**wedivebc** · 20th June 2008, 15:23

Is a positive test not part of a predive? Would that not reveal the problem?

paulraymaekers · 20th June 2008, 16:40

Quote: (Originally Posted by wedivebc)

Is a positive test not part of a predive? Would that not reveal the problem?

would not always reveal a problem: with hard negative or positive pretest you can sometimes 'close' a leak and not detect it, but with very little pressure difference it can leak again...

paul

Amphibiman · 20th June 2008, 18:38

When Nate came back to the shop we re-adjusted both posts in the cassettes and did 2 negative pressure tests for 2 minutes. I think this solved the problem.

When I first saw the amount of water; I also thought it was a hose / mouthpiece leak; but after very close inspection the cover seal is the only thing that made sense, we could see the lower o-ring visibly with the cover on tight.

Regards,

Robin

20th June 2008, 01:26	#1 (permalink)
divernate New Member Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Apr 2008 Location: San Diego Posts: 21	Partial Flood on the rEvo Let me first start off by saying the rEvo is a pleasure to dive and I'm super happy with it. Today my rEvo was partially flooded at 100fsw. I got a mouth full of saltwater with no cocktail. I bailed out and continued my ascend and tried the loop again around 40fsw. By now I worked all the water back to the bottom of the inhalation lung and was able to regain the loop for the rest of the ascent. Back at the jeep, I was astonished to find that the inhalation scrubber looked like a slurpie! There was white residue on all of the sealing surfaces as well as a pint of saltwater in the inhalation lung(my chamois just couldn't absorb it all!). Upon further investigation, the center posts on both sorb cassettes were adjusted in a way which made them too tall. My cover sealed before and I was able to pull a neg. just fine, but once we adjusted the posts on the cassettes so that they matched the other rEvos in the shop, the cover sealed much easier and the neg. was a lot crisper. Just thought I'd throw this out there! Check to make sure your posts are not preventing the lid from COMPLETELY sealing!!! My lid looked normal until you got real close. I dived it for 7 hours with no problem, so, check those lids!!!
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20th June 2008, 01:51	#2 (permalink)
zoo_diver Is it snack time yet? Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Megalodon Join Date: Jun 2007 Location: Suffolk, VA Posts: 267	Re: Partial Flood on the rEvo Quote: (Originally Posted by divernate) Let me first start off by saying the rEvo is a pleasure to dive and I'm super happy with it. Today my rEvo was partially flooded at 100fsw. I got a mouth full of saltwater with no cocktail. I bailed out and continued my ascend and tried the loop again around 40fsw. By now I worked all the water back to the bottom of the inhalation lung and was able to regain the loop for the rest of the ascent. Back at the jeep, I was astonished to find that the inhalation scrubber looked like a slurpie! There was white residue on all of the sealing surfaces as well as a pint of saltwater in the inhalation lung(my chamois just couldn't absorb it all!). Upon further investigation, the center posts on both sorb cassettes were adjusted in a way which made them too tall. My cover sealed before and I was able to pull a neg. just fine, but once we adjusted the posts on the cassettes so that they matched the other rEvos in the shop, the cover sealed much easier and the neg. was a lot crisper. Just thought I'd throw this out there! Check to make sure your posts are not preventing the lid from COMPLETELY sealing!!! My lid looked normal until you got real close. I dived it for 7 hours with no problem, so, check those lids!!! interesting that you were still able to pull a negative. i am not familiar with the revo but you are dawg-on lucky that your mouth full of water wasn't a cocktail! glad that everything worked out okay.
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20th June 2008, 05:21	#3 (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: 1,432	Re: Partial Flood on the rEvo Quote: (Originally Posted by divernate) Let me first start off by saying the rEvo is a pleasure to dive and I'm super happy with it. Today my rEvo was partially flooded at 100fsw. I got a mouth full of saltwater with no cocktail. I bailed out and continued my ascend and tried the loop again around 40fsw. By now I worked all the water back to the bottom of the inhalation lung and was able to regain the loop for the rest of the ascent. Back at the jeep, I was astonished to find that the inhalation scrubber looked like a slurpie! There was white residue on all of the sealing surfaces as well as a pint of saltwater in the inhalation lung(my chamois just couldn't absorb it all!). Upon further investigation, the center posts on both sorb cassettes were adjusted in a way which made them too tall. My cover sealed before and I was able to pull a neg. just fine, but once we adjusted the posts on the cassettes so that they matched the other rEvos in the shop, the cover sealed much easier and the neg. was a lot crisper. Just thought I'd throw this out there! Check to make sure your posts are not preventing the lid from COMPLETELY sealing!!! My lid looked normal until you got real close. I dived it for 7 hours with no problem, so, check those lids!!! hello Nate, I can't understand where the problem came from: what do you mean by 'the posts on the casettes' ? paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
(Online)

20th June 2008, 05:33	#4 (permalink)
divernate New Member Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Apr 2008 Location: San Diego Posts: 21	Re: Partial Flood on the rEvo Quote: (Originally Posted by paulraymaekers) hello Nate, I can't understand where the problem came from: what do you mean by 'the posts on the casettes' ? paul the threaded rod that is in the center of each cassette (scrubber canisters) was adjusted so it was sticking too high and preventing the lid from sealing completely at the top and bottom of the lid. Robin undid the two nuts that secure the rod and measured another cassette and adjusted mine to the same height. The lid secures super nicely now. What's weird is that I have had no problem pulling a neg. and have dived your rEvo for 7 hours without incident! Anyways, I'm still here and still really happy with the unit. I'll be taking it back out tomorrow for a 120min dive, so I'll respond with my results! Last edited by divernate : 20th June 2008 at 05:36.
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20th June 2008, 14:45	#5 (permalink)
kybrt too legit to quit Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Jan 2007 Location: Neuw Yawk Posts: 314	Re: Partial Flood on the rEvo paul, he means the nut on the bottom of the cassettes, if i remember you had to adjust mine, you said 1mm below the bottom and no more and to watch for the cassettes not seating fully.<?> i got the latest revo flash and will be sending you a note soon. marv __________________ Marv Fidelis Ad Mortem www.diveboatkaren.com
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20th June 2008, 15:10	#6 (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: 1,432	Re: Partial Flood on the rEvo Quote: (Originally Posted by divernate) the threaded rod that is in the center of each cassette (scrubber canisters) was adjusted so it was sticking too high and preventing the lid from sealing completely at the top and bottom of the lid. Robin undid the two nuts that secure the rod and measured another cassette and adjusted mine to the same height. The lid secures super nicely now. What's weird is that I have had no problem pulling a neg. and have dived your rEvo for 7 hours without incident! Anyways, I'm still here and still really happy with the unit. I'll be taking it back out tomorrow for a 120min dive, so I'll respond with my results! ok, I see... but I have doubths that that was the reason normally water in the inhale, but not very caustic, meaning it did not pass the canister, is either a leak in the inhale hose, or a leaking OPV salt or a smal grain of sand, in the membrane of the OPV, means slowly leaking water inside that's why we advice, when rincing the lungs (cell grid out, water in lung), push the OPV (or pull if it's a mini) a few times so water flows trough the OPV and takes away any dirt that would have accumulated there give it a try Nad :-) regards paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
(Online)

20th June 2008, 15:17	#7 (permalink)
Hanssing flap-flop ..... flap-flop Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Denmark Posts: 370	Re: Partial Flood on the rEvo Pheew, one of my fears - a caustic. Glad youre well and not scared off. I on purpose go heads down once in a while and breathe in very carefully to try and catch any flooding before it surprises me. Have never had one yet :-) I do however allways have a very wet moisture pad, but its allways fresh-water so its form the sorb-reaction and condensation. It may sound weird but I allways carefully taste the water from each lung to detect any salt-traces. Again none yet. Get back on the rig, and enjoy. Nicolai __________________ Woohooo - I can change my rEvo! Its going to be bitchin' tricked out piece of gear
(Online)

20th June 2008, 15:23	#8 (permalink)
wedivebc FIGJAM Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Other CCR Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,394	Re: Partial Flood on the rEvo Is a positive test not part of a predive? Would that not reveal the problem? __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
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20th June 2008, 16:40	#9 (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: 1,432	Re: Partial Flood on the rEvo Quote: (Originally Posted by wedivebc) Is a positive test not part of a predive? Would that not reveal the problem? would not always reveal a problem: with hard negative or positive pretest you can sometimes 'close' a leak and not detect it, but with very little pressure difference it can leak again... paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
(Online)

20th June 2008, 18:38	#10 (permalink)
Amphibiman New Member Current Rebreather/s: Classic Kiss MK 15.X rEvo Other CCR Other Rebreather/s: rEvo Other CCR Join Date: Jan 2006 Location: San Diego California Posts: 34	Re: Partial Flood on the rEvo When Nate came back to the shop we re-adjusted both posts in the cassettes and did 2 negative pressure tests for 2 minutes. I think this solved the problem. When I first saw the amount of water; I also thought it was a hose / mouthpiece leak; but after very close inspection the cover seal is the only thing that made sense, we could see the lower o-ring visibly with the cover on tight. Regards, Robin
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