My Offboard Bailout Kit - Page 3

cys · 22nd January 2010, 19:38

Quote: (Originally Posted by Lancer4545)

I have breathed from the BOV at 80m without any issues and it worked well.

Leon said an easy flow check with his new BOV was to see if it would free flow. If it does the volume would be ok. It free flows so that's good enough for me!!

Regards,

Lance

Hi Lance,

Thanks much for posting this info.

Chris

divingabe · 22nd January 2010, 21:18

Lance,
I like your set up, it is almost identical to the way I set up the manifold ( I omitted the flow stop on the BOV feed) which I received from you a couple of years ago. Your thought processes for the bail out scenario is very workable.

Gabe

robinfante · 22nd February 2010, 21:24

For those who are thinking about doing an offboard system, and through a search found this thread:

Right around 49:20 Dave describes various facets of an offboard bailout system. My preference was simplicity, his is towards capability. I'm posting this in particular (starting around 1h10m) about the interchangeability of different fittings (starting around 1h10m.) I think his point is valid, and if I had to do it again I would follow his recommendation for a more universally-usable female fitting.

YouTube- 2010 Workshop \| Dave Sutton

robinfante · 22nd February 2010, 21:33

One other follow-up on the thread:

I haven't had a check valve on the BOV side of my setup, meaning that if I disconnect underwater, water can flow up the hose to the BOV. I tested it recently to see how much water would actually enter the system, and the answer was: not much. There definitely was some there, but a tap of the purge button cleared it out before I took a breath. I'm still going to put a check valve on there though, since my goal is to have a dry system to bailout onto in the event of worst-case eye-popping hyperventilation.

**NEDIVER** · 23rd February 2010, 00:02

Here is my new Off board schematic set up. Enjoy!

**kevin stone** · 23rd February 2010, 00:21

Quote: (Originally Posted by NEDIVER)

Here is my new Off board schematic set up. Enjoy!

Alex Diaz's newest design?

Deep Smeg · 23rd September 2010, 09:30

My direct enquiries to Omniswivel about flow data always went unanswered

Many thanks to Miflex UK for getting me the following PDF's.

The flow does seem incredible. Maybe I'm reading it wrong.

What does everyone think?

Seb

steve6690 · 12th September 2011, 00:48

Quote: (Originally Posted by Deep Smeg)

My direct enquiries to Omniswivel about flow data always went unanswered

Many thanks to Miflex UK for getting me the following PDF's.

The flow does seem incredible. Maybe I'm reading it wrong.

What does everyone think?

Seb

Apologies for resurrecting this thread but I'm going down the route of QD's on my soon-to-be acquired BOV. Regarding the above question, I don't see how a CEJN 221 with a 5mm bore diameter could only be rated to 580 lpm, IF the Omniswivel apparently can deliver 1274 lpm through a 4.8mm bore size, assuming the valves open fully when connected. However, in another thread here, M&J quote the Cv of their QD as being the same as CEJN 221 at approximately 0.8.
M&J's figures for their QD mean that it will deliver more flow than the CEJN 345 with a 6.2mm bore diameter (1100 lpm, 38.8 CFM).
To the unqualified (ie me) their figures don't seem to stack up but I'm sure there's more to this. What am I missing ?

**OceanOpportunity** · 13th September 2011, 14:24

Quote: (Originally Posted by steve6690)

Apologies for resurrecting this thread but I'm going down the route of QD's on my soon-to-be acquired BOV. Regarding the above question, I don't see how a CEJN 221 with a 5mm bore diameter could only be rated to 580 lpm, IF the Omniswivel apparently can deliver 1274 lpm through a 4.8mm bore size, assuming the valves open fully when connected. However, in another thread here, M&J quote the Cv of their QD as being the same as CEJN 221 at approximately 0.8.
M&J's figures for their QD mean that it will deliver more flow than the CEJN 345 with a 6.2mm bore diameter (1100 lpm, 38.8 CFM).
To the unqualified (ie me) their figures don't seem to stack up but I'm sure there's more to this. What am I missing ?

cross check inlet pressures and ambient pressure change (if any)

steve6690 · 13th September 2011, 15:10

All but Omni use an IP of 6 bar with a drop of 0.5 bar which appears to be a commonly used standard. Omni use 100 psi IP (6.85) bar but don't specify the drop.

Sent from my GT-I9000 using Tapatalk

22nd January 2010, 19:38	#21 (permalink)
cys Dive different. mk15.5, mk15 classic KISS Join Date: Feb 2005 Location: S. California Posts: 499	Re: My Offboard Bailout Kit Quote: (Originally Posted by Lancer4545) I have breathed from the BOV at 80m without any issues and it worked well. Leon said an easy flow check with his new BOV was to see if it would free flow. If it does the volume would be ok. It free flows so that's good enough for me!! Regards, Lance Hi Lance, Thanks much for posting this info. Chris
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22nd January 2010, 21:18	#22 (permalink)
divingabe Hammermeg, Copis2, Kiss Hammermeg, copis meg Kiss Sport, Draeger dolphin Join Date: Oct 2005 Location: Sag Harbor Posts: 498	Re: My Offboard Bailout Kit Lance, I like your set up, it is almost identical to the way I set up the manifold ( I omitted the flow stop on the BOV feed) which I received from you a couple of years ago. Your thought processes for the bail out scenario is very workable. Gabe
(Online)

22nd February 2010, 21:33	#24 (permalink)
robinfante I have a smoking gun HammerMeg, Sidemount Prism, HammerMk15, LARV, Kiss Join Date: Nov 2005 Location: mountain lakes nj Posts: 338	Re: My Offboard Bailout Kit One other follow-up on the thread: I haven't had a check valve on the BOV side of my setup, meaning that if I disconnect underwater, water can flow up the hose to the BOV. I tested it recently to see how much water would actually enter the system, and the answer was: not much. There definitely was some there, but a tap of the purge button cleared it out before I took a breath. I'm still going to put a check valve on there though, since my goal is to have a dry system to bailout onto in the event of worst-case eye-popping hyperventilation.
(Offline)

23rd February 2010, 00:02	#25 (permalink)
NEDIVER Sic Semper Tyrannis Join Date: Jan 2008 Location: back in the Northeast! Posts: 770	Re: My Offboard Bailout Kit Here is my new Off board schematic set up. Enjoy! __________________ .Tom. "slow is smooth, and smooth is fast" TM "Insanity is repeating the same thing over and over again, expecting different results" Albert Einstein Avatar Photo courtesy of: Curt Bowen
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23rd February 2010, 00:21	#26 (permalink)
kevin stone Supporting Member Classic Kiss Hammerhead Sport Kiss Hammerhead Join Date: Jun 2005 Location: us ct. Posts: 649	Re: My Offboard Bailout Kit Quote: (Originally Posted by NEDIVER) Here is my new Off board schematic set up. Enjoy! Alex Diaz's newest design?
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12th September 2011, 00:48	#28 (permalink)
steve6690 RBW Member AP Inspiration Vision Join Date: Mar 2007 Location: Worcester, UK Posts: 108	Re: My Offboard Bailout Kit Quote: (Originally Posted by Deep Smeg) My direct enquiries to Omniswivel about flow data always went unanswered Many thanks to Miflex UK for getting me the following PDF's. The flow does seem incredible. Maybe I'm reading it wrong. What does everyone think? Seb Apologies for resurrecting this thread but I'm going down the route of QD's on my soon-to-be acquired BOV. Regarding the above question, I don't see how a CEJN 221 with a 5mm bore diameter could only be rated to 580 lpm, IF the Omniswivel apparently can deliver 1274 lpm through a 4.8mm bore size, assuming the valves open fully when connected. However, in another thread here, M&J quote the Cv of their QD as being the same as CEJN 221 at approximately 0.8. M&J's figures for their QD mean that it will deliver more flow than the CEJN 345 with a 6.2mm bore diameter (1100 lpm, 38.8 CFM). To the unqualified (ie me) their figures don't seem to stack up but I'm sure there's more to this. What am I missing ? Last edited by steve6690; 12th September 2011 at 00:55..
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13th September 2011, 14:24	#29 (permalink)
OceanOpportunity for a world of water rEvo II mCCR/SW Predator Join Date: Nov 2006 Location: Providence, RI USA Posts: 1,309	Re: My Offboard Bailout Kit Quote: (Originally Posted by steve6690) Apologies for resurrecting this thread but I'm going down the route of QD's on my soon-to-be acquired BOV. Regarding the above question, I don't see how a CEJN 221 with a 5mm bore diameter could only be rated to 580 lpm, IF the Omniswivel apparently can deliver 1274 lpm through a 4.8mm bore size, assuming the valves open fully when connected. However, in another thread here, M&J quote the Cv of their QD as being the same as CEJN 221 at approximately 0.8. M&J's figures for their QD mean that it will deliver more flow than the CEJN 345 with a 6.2mm bore diameter (1100 lpm, 38.8 CFM). To the unqualified (ie me) their figures don't seem to stack up but I'm sure there's more to this. What am I missing ? cross check inlet pressures and ambient pressure change (if any) __________________ Michael Lombardi .: bringing you an Ocean of Opportunity .: Undersea Resource Center \| Ocean State .: Blog \| A New Life in the Sea .: Diving Safety Officer \| American Museum of Natural History ------------------------------- *proud supporter* Ocean Opportunity Inc. \| a 501(c)3 not for profit organization Add your support with every purchase when you use the Ocean Opportunity Platinum® Visa Rewards card
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13th September 2011, 15:10	#30 (permalink)
steve6690 RBW Member AP Inspiration Vision Join Date: Mar 2007 Location: Worcester, UK Posts: 108	All but Omni use an IP of 6 bar with a drop of 0.5 bar which appears to be a commonly used standard. Omni use 100 psi IP (6.85) bar but don't specify the drop. Sent from my GT-I9000 using Tapatalk
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