BOV Gas Supply

***diverklondike*** · 2nd April 2006, 04:37

With all of the interest in BOV's I was wondering what people were thinking about when it comes to the gas source for the BOV.

Here are a couple options that come to mind...

1) Off board supply only via Swagelok or other quick connect

2) On board supply with off board piped into on board via Swagelok or other quick connect

3) Some combination of the above via a switchable gas block with applicable Swagelok or other quick connect

At this point I am leaning towards option "3".

Dive Safe....

Mark

***caveseeker7*** · 2nd April 2006, 08:57

I gather that largely depends on dives and needed bailout you carry.
For my level of diving (single gas bailout) I like the way Simon set up
his gas supply. I guess it would be

1 1/2) Onboard or offboard via Swagelock QC

**nigelh** · 2nd April 2006, 11:37

Quote: (Originally Posted by diverklondike)

With all of the interest in BOV's I was wondering what people were thinking about when it comes to the gas source for the BOV.

I run mine straight off the DIL.

Rather than faffing about with quick connects or switches I can swap a reg. I only need the BOV to get me off the loop in a snap before a wrong gas does something nasty to me. Once I have a couple of breaths of safe gas in me I can reassess what is available.

OK I might have to revise this if my DIL is unbreathable on my shallowest stop but that is so far beyond my current range it's not a problem.

pchanning · 2nd April 2006, 11:47

Hi Mark,

Personally I opt for:

ADV for inboard
BOV direct from offboard only

This maximises my options whilst minimising common failure paths. Of course if the mouthpiece explodes, then I'm stuffed. LOL!

Regards
Paul

EDIT: trimix dils/ bail-out are minimum 15% o2 so everything is breathable at the surface.

Drmike · 2nd April 2006, 12:01

Quote: (Originally Posted by diverklondike)

With all of the interest in BOV's I was wondering what people were thinking about when it comes to the gas source for the BOV.

Here are a couple options that come to mind...

1) Off board supply only via Swagelok or other quick connect

2) On board supply with off board piped into on board via Swagelok or other quick connect

3) Some combination of the above via a switchable gas block with applicable Swagelok or other quick connect

At this point I am leaning towards option "3".

Dive Safe....

Mark

I would avoid 3) as a mistake with a switchblock could kill you.

Im curious why do you feel you need a switchblock? Is there a need for high speed switching? OC guys dont seem to have a problem with swapping regs.
Personnaly I dont see the benefit of a switchblock and I do see potential for possibly fatal mistakes (switching to the wrong gas)

Another safety benefit of not using a switchblock is that a buddy can easily see what gas you are switching to and at all times what gas you are breathing from just by looking at what tank the hose you have connected your BOV leads to. Just like the DIR boys do a buddy can help verify a switch

Drmike · 2nd April 2006, 12:03

Quote: (Originally Posted by pchanning)

Hi Mark,

Personally I opt for:

ADV for inboard
BOV direct from offboard only

This maximises my options whilst minimising common failure paths. Of course if the mouthpiece explodes, then I'm stuffed. LOL!

Regards
Paul

EDIT: trimix dils/ bail-out are minimum 15% o2 so everything is breathable at the surface.

This is the configuration I settled on after a lot of trial and testing.
If the BOV explodes you still have the 2nd stages on your offboards to use.

**trob09** · 2nd April 2006, 13:03

Mark,

We are definitely dancing around the same concepts here. I spent an hour or so yesterday looking at this and my meg trying to determine the best configuration.

T

pchanning · 2nd April 2006, 14:20

Quote: (Originally Posted by Drmike)

This is the configuration I settled on after a lot of trial and testing.
If the BOV explodes you still have the 2nd stages on your offboards to use.

The 2nd stages can also be given to someone else without compromising my access.

Currently, I only have a GCS whip off my bottom mix stage, hard-wiring it to the BOV, but if I put a GCS whip on the deco stage, then that is accessible to me also without the need for buddy breathing. I know it all seems a bit like everything has gone wrong to get to such a point. But for the sake of 1 o-ring, the benefit vs the gain is probably worth it. Thoughts..??

SimonK · 2nd April 2006, 18:09

Quote: (Originally Posted by pchanning)

Currently, I only have a GCS whip off my bottom mix stage, hard-wiring it to the BOV, but if I put a GCS whip on the deco stage, then that is accessible to me also without the need for buddy breathing. I know it all seems a bit like everything has gone wrong to get to such a point. But for the sake of 1 o-ring, the benefit vs the gain is probably worth it. Thoughts..??

I have seen a buddys GCS jam open and free flow gas when he made a mess of changing a reg between two supplies. He lost 100 Bar of dil very quickly. I like Padowan's solution of setting it up before the dive and leaving it.

Simon

Skipbreather · 2nd April 2006, 18:58

I feed my BOV from off board via QD so I can pass off stage if buddy needs it. Stage also has conventional 2nd on 7 ft hose. I have access to breath my dil directly via open loop- works well on Meg- and via Zeagle Octo+ inflator for wings.

Ken

2nd April 2006, 04:37	#1 (permalink)
*diverklondike* Moderator Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Oct 2005 Location: Delaware, USA Posts: 1,552	BOV Gas Supply With all of the interest in BOV's I was wondering what people were thinking about when it comes to the gas source for the BOV. Here are a couple options that come to mind... 1) Off board supply only via Swagelok or other quick connect 2) On board supply with off board piped into on board via Swagelok or other quick connect 3) Some combination of the above via a switchable gas block with applicable Swagelok or other quick connect At this point I am leaning towards option "3". Dive Safe.... Mark
(Online)

2nd April 2006, 08:57	#2 (permalink)
*caveseeker7* Who loves ya, baby Current Rebreather/s: Sport Kiss Other Rebreather/s: Prism Topaz Join Date: Jan 2005 Location: Too far from Neverland Posts: 5,419	Re: BOV Gas Supply I gather that largely depends on dives and needed bailout you carry. For my level of diving (single gas bailout) I like the way Simon set up his gas supply. I guess it would be 1 1/2) Onboard or offboard via Swagelock QC __________________ Cheers Stefan "Political Correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.'!"
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2nd April 2006, 11:37	#3 (permalink)
nigelh New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 821	Re: BOV Gas Supply Quote: (Originally Posted by diverklondike) With all of the interest in BOV's I was wondering what people were thinking about when it comes to the gas source for the BOV. I run mine straight off the DIL. Rather than faffing about with quick connects or switches I can swap a reg. I only need the BOV to get me off the loop in a snap before a wrong gas does something nasty to me. Once I have a couple of breaths of safe gas in me I can reassess what is available. OK I might have to revise this if my DIL is unbreathable on my shallowest stop but that is so far beyond my current range it's not a problem. __________________ nigelh
(Online)

2nd April 2006, 11:47	#4 (permalink)
pchanning PFO free :) Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: fixed! Posts: 454	Re: BOV Gas Supply Hi Mark, Personally I opt for: ADV for inboard BOV direct from offboard only This maximises my options whilst minimising common failure paths. Of course if the mouthpiece explodes, then I'm stuffed. LOL! Regards Paul EDIT: trimix dils/ bail-out are minimum 15% o2 so everything is breathable at the surface. __________________ Cheers Paul The key to enlightenment... is survival.
(Offline)

2nd April 2006, 12:01	#5 (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: 3,128	Re: BOV Gas Supply Quote: (Originally Posted by diverklondike) With all of the interest in BOV's I was wondering what people were thinking about when it comes to the gas source for the BOV. Here are a couple options that come to mind... 1) Off board supply only via Swagelok or other quick connect 2) On board supply with off board piped into on board via Swagelok or other quick connect 3) Some combination of the above via a switchable gas block with applicable Swagelok or other quick connect At this point I am leaning towards option "3". Dive Safe.... Mark I would avoid 3) as a mistake with a switchblock could kill you. Im curious why do you feel you need a switchblock? Is there a need for high speed switching? OC guys dont seem to have a problem with swapping regs. Personnaly I dont see the benefit of a switchblock and I do see potential for possibly fatal mistakes (switching to the wrong gas) Another safety benefit of not using a switchblock is that a buddy can easily see what gas you are switching to and at all times what gas you are breathing from just by looking at what tank the hose you have connected your BOV leads to. Just like the DIR boys do a buddy can help verify a switch __________________ 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 Last edited by Drmike : 2nd April 2006 at 13:29.
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2nd April 2006, 12:03	#6 (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: 3,128	Re: BOV Gas Supply Quote: (Originally Posted by pchanning) Hi Mark, Personally I opt for: ADV for inboard BOV direct from offboard only This maximises my options whilst minimising common failure paths. Of course if the mouthpiece explodes, then I'm stuffed. LOL! Regards Paul EDIT: trimix dils/ bail-out are minimum 15% o2 so everything is breathable at the surface. This is the configuration I settled on after a lot of trial and testing. If the BOV explodes you still have the 2nd stages on your offboards to use. __________________ 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
(Offline)

2nd April 2006, 13:03	#7 (permalink)
trob09 . Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Feb 2005 Posts: 696	Re: BOV Gas Supply Mark, We are definitely dancing around the same concepts here. I spent an hour or so yesterday looking at this and my meg trying to determine the best configuration. T
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2nd April 2006, 14:20	#8 (permalink)
pchanning PFO free :) Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: fixed! Posts: 454	Re: BOV Gas Supply Quote: (Originally Posted by Drmike) This is the configuration I settled on after a lot of trial and testing. If the BOV explodes you still have the 2nd stages on your offboards to use. The 2nd stages can also be given to someone else without compromising my access. Currently, I only have a GCS whip off my bottom mix stage, hard-wiring it to the BOV, but if I put a GCS whip on the deco stage, then that is accessible to me also without the need for buddy breathing. I know it all seems a bit like everything has gone wrong to get to such a point. But for the sake of 1 o-ring, the benefit vs the gain is probably worth it. Thoughts..?? __________________ Cheers Paul The key to enlightenment... is survival.
(Offline)

2nd April 2006, 18:09	#9 (permalink)
SimonK Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Oct 2005 Location: Cumbria UK Posts: 231	Re: BOV Gas Supply Quote: (Originally Posted by pchanning) Currently, I only have a GCS whip off my bottom mix stage, hard-wiring it to the BOV, but if I put a GCS whip on the deco stage, then that is accessible to me also without the need for buddy breathing. I know it all seems a bit like everything has gone wrong to get to such a point. But for the sake of 1 o-ring, the benefit vs the gain is probably worth it. Thoughts..?? I have seen a buddys GCS jam open and free flow gas when he made a mess of changing a reg between two supplies. He lost 100 Bar of dil very quickly. I like Padowan's solution of setting it up before the dive and leaving it. Simon
(Offline)

2nd April 2006, 18:58	#10 (permalink)
Skipbreather Reads the fine print Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet MK 15.X Home Build Join Date: Mar 2005 Location: Chicago, Illinois, USA Posts: 540	Re: BOV Gas Supply I feed my BOV from off board via QD so I can pass off stage if buddy needs it. Stage also has conventional 2nd on 7 ft hose. I have access to breath my dil directly via open loop- works well on Meg- and via Zeagle Octo+ inflator for wings. Ken
(Offline)

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