Boris floods

Pierre Farrugia · 30th September 2006, 08:53

Hello all,

Lately I hear about Boris floods. Today I read about Iani and last time there was an other one who mentioned this but didn't mention the breather and could also be a Boris. If you own a Boris and had a flood, can you tell us why, faulty equipment or user problems, like maint. or poor checks (just to mention it, not saying anyone of you is a lousy diver)? Does a flood gives you a caustic cocktail?

divetheworld · 30th September 2006, 09:32

Quote: (Originally Posted by Pierre Farrugia)

Hello all,

Lately I hear about Boris floods. Today I read about Iani and last time there was an other one who mentioned this but didn't mention the breather and could also be a Boris. If you own a Boris and had a flood, can you tell us why, faulty equipment or user problems, like maint. or poor checks (just to mention it, not saying anyone of you is a lousy diver)? Does a flood gives you a caustic cocktail?

The scrubber cover (big expensive delrin bit) is quite flexible, I think there has been some development on this?
I didnt pay much attention, ahem.... Mr Cooper?

B.

iani · 30th September 2006, 10:41

The first two batches of units had a scrubber dome that was manufactured by another company, these domes seem to distort and this has led to a number of floods. From the third batch of units the domes have been made in house and supposedly don't distort so much, mine has distorted by 1mm apparently and this is "well within specification".

My flood may be down to the FFM, there is a sliding part on the inner mouthpiece and apparently this can cause a leak if it isn't either fully open or closed, I am yet to test it since I found this out.

In answer to Pierre's query about caustic cocktail, yes, I took a mouthful and lucky managed to avoid swallowing any. On the FFM bailout is achieved by breathing OC through your nose so I switched to that, shut the CC mouthpiece and spat the caustic out. I am taking my unit to Vobster tomorrow and am going to test it with & without the FFM, I have now had two floods on two consecutive dives, one of them ruining my holiday, it's fair to say I'm rather pissed off with the rig at the moment.

Ian

whaam68 · 30th September 2006, 11:22

I'm not a Boris user but we have a couple in our club who have had floods. Watching one on deck strip down it seemed like granules of sorb had lodged under the OPV flapper valve in one of the lungs. The unit had passed the pos/neg.
regards
Mike

iain-hsm · 30th September 2006, 12:07

Quote: (Originally Posted by iani)

The first two batches of units had a scrubber dome that was manufactured by another company, these domes seem to distort and this has led to a number of floods. From the third batch of units the domes have been made in house and supposedly don't distort so much, mine has distorted by 1mm apparently and this is "well within specification".
Ian

In defense of the engineering company who machined the parts. I recall taking with them last year about the poor choice of material.

The material chosen by them and used in production is well known to be prone to dimentional instability and stress concentrations due to loading imbalance and to stress cracking in salt water.
It would be of great interest if as you say that 1mm is within tolerance what they suggest is the maximum allowable tolerance allowed. I trust you get this in writing.

CCR-DIVER · 30th September 2006, 12:31

Hi Guys,

My Boris is nº 36, i never had a leak (caustic cocktail), my dome had a litle expand, but still old negative very well.

Sometimes (if i didn´t check) some small grans of sofnolime could stay under membrane of OP valve, and could leak (after more 90 minutes diving), but not caustick cocktail, just wet sofnolime.

I know it´s not very good, but scrubber still work fantastic even under that situation.

Hidrofobic menbrane help a little.

cheers and safe diving.

José

iani · 30th September 2006, 15:55

Quote: (Originally Posted by whaam68)

I'm not a Boris user but we have a couple in our club who have had floods. Watching one on deck strip down it seemed like granules of sorb had lodged under the OPV flapper valve in one of the lungs. The unit had passed the pos/neg.
regards
Mike

The plastic plate in the OPV has now been replaced by a larger version, supposedly this reduces the likelihood of lime getting stuck, I have certainly found lime in my OPV in the past and it is a good source of problems trying to pull a negative. The OPV seems to work better when wet so I now dampen it before doing a neg test.

Ian

Drmike · 30th September 2006, 17:55

Quote: (Originally Posted by iani)

The plastic plate in the OPV has now been replaced by a larger version, supposedly this reduces the likelihood of lime getting stuck, I have certainly found lime in my OPV in the past and it is a good source of problems trying to pull a negative. The OPV seems to work better when wet so I now dampen it before doing a neg test.

Ian

yesterday 350m+ in Russel with new modified OPV had full loop flood and had to come out on OC.

Grain in OPV
btw RMV 35LPM

***jradomski*** · 30th September 2006, 18:06

Quote: (Originally Posted by Drmike)

yesterday 350m+ in Russel with new modified OPV had full loop flood and had to come out on OC.

Grain in OPV
btw RMV 35LPM

sounds like you need to switch to an mk15, inspiration or meg, to get a rig with a longtime reliable loop.

Drmike · 30th September 2006, 18:31

Quote: (Originally Posted by jradomski)

sounds like you need to switch to an mk15, inspiration or meg, to get a rig with a longtime reliable loop.

no i just need a more gunk tolerant opv....i have an idea that should sort it. its not rocket science.

other than 2 floods in two days had a blast in the french caves.

boris took me to 850m in Russel today so i must have faith in her

never had an opv problem if you keep crap out the loop. i just fitted a new lung and the crap came from there (grain of sealant)

from yesterday -
whats wrong with this pic?

30th September 2006, 08:53	#1 (permalink)
Pierre Farrugia Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: Malta Posts: 636	Boris floods Hello all, Lately I hear about Boris floods. Today I read about Iani and last time there was an other one who mentioned this but didn't mention the breather and could also be a Boris. If you own a Boris and had a flood, can you tell us why, faulty equipment or user problems, like maint. or poor checks (just to mention it, not saying anyone of you is a lousy diver)? Does a flood gives you a caustic cocktail? __________________ Pierre Farrugia My wife told me " If you don't quit diving I'm going to leave you" My reply " God, I'll miss you" www.atlam.org www.divemed.com
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30th September 2006, 09:32	#2 (permalink)
divetheworld Dive porn pimp Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Classic Kiss Other CCR Join Date: Mar 2005 Location: Leeds, England Posts: 1,507	Re: Boris floods Quote: (Originally Posted by Pierre Farrugia) Hello all, Lately I hear about Boris floods. Today I read about Iani and last time there was an other one who mentioned this but didn't mention the breather and could also be a Boris. If you own a Boris and had a flood, can you tell us why, faulty equipment or user problems, like maint. or poor checks (just to mention it, not saying anyone of you is a lousy diver)? Does a flood gives you a caustic cocktail? The scrubber cover (big expensive delrin bit) is quite flexible, I think there has been some development on this? I didnt pay much attention, ahem.... Mr Cooper? B. __________________ Self praise is no reccomendation. Dont try to be a great man, just be a man and let history be the judge of you. CHECK OUT OUR INTERWEBS FOR CUSTOM REBREATHER UPGRADES *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe
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30th September 2006, 10:41	#3 (permalink)
iani Nefarious Activist Current Rebreather/s: Ouroboros Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: Middlesex, UK Posts: 334	Re: Boris floods The first two batches of units had a scrubber dome that was manufactured by another company, these domes seem to distort and this has led to a number of floods. From the third batch of units the domes have been made in house and supposedly don't distort so much, mine has distorted by 1mm apparently and this is "well within specification". My flood may be down to the FFM, there is a sliding part on the inner mouthpiece and apparently this can cause a leak if it isn't either fully open or closed, I am yet to test it since I found this out. In answer to Pierre's query about caustic cocktail, yes, I took a mouthful and lucky managed to avoid swallowing any. On the FFM bailout is achieved by breathing OC through your nose so I switched to that, shut the CC mouthpiece and spat the caustic out. I am taking my unit to Vobster tomorrow and am going to test it with & without the FFM, I have now had two floods on two consecutive dives, one of them ruining my holiday, it's fair to say I'm rather pissed off with the rig at the moment. Ian
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30th September 2006, 11:22	#4 (permalink)
whaam68 CK#121 Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: May 2005 Location: UK not so sunny Luton Posts: 81	Re: Boris floods I'm not a Boris user but we have a couple in our club who have had floods. Watching one on deck strip down it seemed like granules of sorb had lodged under the OPV flapper valve in one of the lungs. The unit had passed the pos/neg. regards Mike
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30th September 2006, 12:07	#5 (permalink)
iain-hsm Custom Title Allowed! Current Rebreather/s: MK 15.X Other CCR Other SCR Other Rebreather/s: Other CCR Other SCR Join Date: Mar 2005 Location: Loughborough England uk Posts: 345	Re: Boris floods Quote: (Originally Posted by iani) The first two batches of units had a scrubber dome that was manufactured by another company, these domes seem to distort and this has led to a number of floods. From the third batch of units the domes have been made in house and supposedly don't distort so much, mine has distorted by 1mm apparently and this is "well within specification". Ian In defense of the engineering company who machined the parts. I recall taking with them last year about the poor choice of material. The material chosen by them and used in production is well known to be prone to dimentional instability and stress concentrations due to loading imbalance and to stress cracking in salt water. It would be of great interest if as you say that 1mm is within tolerance what they suggest is the maximum allowable tolerance allowed. I trust you get this in writing.
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30th September 2006, 12:31	#6 (permalink)
CCR-DIVER New Member Current Rebreather/s: Inspiration Classic Ouroboros Other Rebreather/s: Inspiration Classic Join Date: Jun 2005 Location: Portugal Posts: 72	Re: Boris floods Hi Guys, My Boris is nº 36, i never had a leak (caustic cocktail), my dome had a litle expand, but still old negative very well. Sometimes (if i didn´t check) some small grans of sofnolime could stay under membrane of OP valve, and could leak (after more 90 minutes diving), but not caustick cocktail, just wet sofnolime. I know it´s not very good, but scrubber still work fantastic even under that situation. Hidrofobic menbrane help a little. cheers and safe diving. José __________________ *José Marques* *www.in-silence.com*
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30th September 2006, 15:55	#7 (permalink)
iani Nefarious Activist Current Rebreather/s: Ouroboros Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: Middlesex, UK Posts: 334	Re: Boris floods Quote: (Originally Posted by whaam68) I'm not a Boris user but we have a couple in our club who have had floods. Watching one on deck strip down it seemed like granules of sorb had lodged under the OPV flapper valve in one of the lungs. The unit had passed the pos/neg. regards Mike The plastic plate in the OPV has now been replaced by a larger version, supposedly this reduces the likelihood of lime getting stuck, I have certainly found lime in my OPV in the past and it is a good source of problems trying to pull a negative. The OPV seems to work better when wet so I now dampen it before doing a neg test. Ian
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30th September 2006, 17:55	#8 (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: Boris floods Quote: (Originally Posted by iani) The plastic plate in the OPV has now been replaced by a larger version, supposedly this reduces the likelihood of lime getting stuck, I have certainly found lime in my OPV in the past and it is a good source of problems trying to pull a negative. The OPV seems to work better when wet so I now dampen it before doing a neg test. Ian yesterday 350m+ in Russel with new modified OPV had full loop flood and had to come out on OC. Grain in OPV btw RMV 35LPM __________________ 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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30th September 2006, 18:06	#9 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Home Build Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Home Build Join Date: Mar 2005 Location: "Da" Bronx Posts: 2,795	Re: Boris floods Quote: (Originally Posted by Drmike) yesterday 350m+ in Russel with new modified OPV had full loop flood and had to come out on OC. Grain in OPV btw RMV 35LPM sounds like you need to switch to an mk15, inspiration or meg, to get a rig with a longtime reliable loop. __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.
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