How do you use your OPV?

lof · 6th January 2009, 03:00

Seeing that OR is arguing for a placement of an OPV into an inhalation counterlung, i'd like to know how or if people use their OPV.
I personally never use it to dump gas (nose/loose lips give much finer control) on any of my rigs (except RB80 obviously)
The only use I have for it is to evacuate water from the loop and that could be batter served by a simple dump valve.
How do YOU use your OPV?

**diverklondike** · 6th January 2009, 03:11

Personally I can not remember the last time that I vented via the OPV versus mouth/nose as you mentioned. With that I can see a need for it in the case of an ascent on OC.

M

kwinter · 6th January 2009, 03:16

I'll be adding my full face mask soon and plan to try using the OPV for venting on ascent. For now, I use it when doing a dil flush.

lof · 6th January 2009, 03:21

I do not use it even with the FFM. Still easier to use nose on Drager Panorama (clears water from the mask too :)).
Same for the ascent on OC, rahter than leaving the loop go so big that the OPV must trigger, I open the moutpiece periodically, better buoyancy control IMHO.

cramerdn · 6th January 2009, 06:35

Quote: (Originally Posted by kwinter)

For now, I use it when doing a dil flush.

me too is that #1, #2, #3 or #4 on the poll?

scunick · 6th January 2009, 06:46

Quote: (Originally Posted by lof)

I personally never use it to dump gas (nose/loose lips give much finer control) on any of my rigs (except RB80 obviously)
The only use I have for it is to evacuate water from the loop and that could be batter served by a simple dump valve.

Ditto

ATB

Nick

paulraymaekers · 6th January 2009, 07:31

Quote: (Originally Posted by scunick)

Ditto

ATB

Nick

only in emergency, meaning when I have to bail-out in oc, ... and even then I dump the loop by opening/closing the DSV above head.

Having said that, it's 4 years ago I had to bail out to OC, on a test-rig

.... but the issue about OPV on inhale versus exhale... IMHO is a 'non-issue'...

paul

Chris · 6th January 2009, 07:44

Only time I use mine on the Meg is to drain out any lung butter between dives. Rest of the time it is shut tight.

Usually just vent through mouth or nose during ascent and flushes.

Cheers
Chris

lizardland · 6th January 2009, 08:01

On the KISS... never. I had mine shimmed up tight so that it wouldn't really dump anyway (even considered epoxying it shut).

On the Mk15, I'm a bit more aware of the OPV firing on ascent which is usually combined with the solenoid firing more often which generally acts as a slap round the head to get my lung volume down.

**PhilSiswick** · 6th January 2009, 08:30

Quote: (Originally Posted by cramerdn)

me too is that #1, #2, #3 or #4 on the poll?

Ditto to your ditto - I selected 3, as I'm firmly of the opinion that a dil flush is an emergency (or response to one)

View Poll Results: Do you use your OPV to dump gas?
Always or most of the time	7	7.14%
Sometimes	21	21.43%
Only in emergency	32	32.65%
Never	38	38.78%
Voters: 98. You may not vote on this poll

6th January 2009, 03:00	#1 (permalink)
lof RBW Master Plumber Current Rebreather/s: Megalodon Prism Topaz Sport Kiss Classic Kiss MK 15.X Other CCR RB80 / Clone Other SCR Home Build Other Rebreather/s: Other CCR RB80 / Clone Other SCR Home Build Join Date: Jun 2005 Location: USA Posts: 679	How do you use your OPV? Seeing that OR is arguing for a placement of an OPV into an inhalation counterlung, i'd like to know how or if people use their OPV. I personally never use it to dump gas (nose/loose lips give much finer control) on any of my rigs (except RB80 obviously) The only use I have for it is to evacuate water from the loop and that could be batter served by a simple dump valve. How do YOU use your OPV? __________________ Jakub Golem Gear ShopKeeper www.golemgear.com
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6th January 2009, 03:11	#2 (permalink)
diverklondike Hammerhead CCR Current Rebreather/s: Other Rebreather/s: Inspiration Classic Join Date: Oct 2005 Location: Delaware, USA Posts: 1,999	Re: How do you use your OPV? Personally I can not remember the last time that I vented via the OPV versus mouth/nose as you mentioned. With that I can see a need for it in the case of an ascent on OC. M
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6th January 2009, 03:16	#3 (permalink)
kwinter Down to no good Current Rebreather/s: Optima Other Rebreather/s: Join Date: Sep 2005 Location: NJ Posts: 257	Re: How do you use your OPV? I'll be adding my full face mask soon and plan to try using the OPV for venting on ascent. For now, I use it when doing a dil flush.
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6th January 2009, 03:21	#4 (permalink)
lof RBW Master Plumber Current Rebreather/s: Megalodon Prism Topaz Sport Kiss Classic Kiss MK 15.X Other CCR RB80 / Clone Other SCR Home Build Other Rebreather/s: Other CCR RB80 / Clone Other SCR Home Build Join Date: Jun 2005 Location: USA Posts: 679	Re: How do you use your OPV? I do not use it even with the FFM. Still easier to use nose on Drager Panorama (clears water from the mask too :)). Same for the ascent on OC, rahter than leaving the loop go so big that the OPV must trigger, I open the moutpiece periodically, better buoyancy control IMHO. __________________ Jakub Golem Gear ShopKeeper www.golemgear.com
(Offline)

6th January 2009, 06:35	#5 (permalink)
cramerdn Dumb Sudditeologist Current Rebreather/s: Evolution Dolphin Other Rebreather/s: Dolphin Join Date: Dec 2006 Location: Townsville QLD Posts: 1,107	Re: How do you use your OPV? Quote: (Originally Posted by kwinter) For now, I use it when doing a dil flush. me too is that #1, #2, #3 or #4 on the poll?
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6th January 2009, 06:46	#6 (permalink)
scunick Nick Cunningham-Moorat Current Rebreather/s: Other CCR Other Rebreather/s: Inspiration Classic Inspiration Vision Other CCR Join Date: Jun 2005 Location: South Africa - Cape Town Posts: 124	Re: How do you use your OPV? Quote: (Originally Posted by lof) I personally never use it to dump gas (nose/loose lips give much finer control) on any of my rigs (except RB80 obviously) The only use I have for it is to evacuate water from the loop and that could be batter served by a simple dump valve. Ditto ATB Nick
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6th January 2009, 07:31	#7 (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: 1,997	Re: How do you use your OPV? Quote: (Originally Posted by scunick) Ditto ATB Nick only in emergency, meaning when I have to bail-out in oc, ... and even then I dump the loop by opening/closing the DSV above head. Having said that, it's 4 years ago I had to bail out to OC, on a test-rig .... but the issue about OPV on inhale versus exhale... IMHO is a 'non-issue'... paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
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6th January 2009, 07:44	#8 (permalink)
Chris Go Nude Or Go Home Current Rebreather/s: Megalodon Other Rebreather/s: Inspiration Classic Megalodon Prism Topaz Sport Kiss Join Date: Feb 2005 Location: Perth, Western Australia Posts: 636	Re: How do you use your OPV? Only time I use mine on the Meg is to drain out any lung butter between dives. Rest of the time it is shut tight. Usually just vent through mouth or nose during ascent and flushes. Cheers Chris
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6th January 2009, 08:01	#9 (permalink)
lizardland Yak Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Classic Kiss Home Build Join Date: Mar 2005 Location: North... Posts: 1,643	Re: How do you use your OPV? On the KISS... never. I had mine shimmed up tight so that it wouldn't really dump anyway (even considered epoxying it shut). On the Mk15, I'm a bit more aware of the OPV firing on ascent which is usually combined with the solenoid firing more often which generally acts as a slap round the head to get my lung volume down.
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6th January 2009, 08:30	#10 (permalink)
PhilSiswick Phil Siswick, Tango Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Vision Join Date: Apr 2006 Location: Oxford, UK Posts: 1,284	Re: How do you use your OPV? Quote: (Originally Posted by cramerdn) me too is that #1, #2, #3 or #4 on the poll? Ditto to your ditto - I selected 3, as I'm firmly of the opinion that a dil flush is an emergency (or response to one) __________________ Phil (WSKD 0001) I have always felt that the dive I am on is not nearly important as the dives I plan to be on the rest of my life. Tom Rose, 2007 The person who gets the farthest is generally the one who is willing to do and dare. The sure thing boat never gets far from shore. Charles A. Lindbergh www.hugsac.org.uk
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