BOV-less rEvo

tony13

Taking a quick poll. Don't know if it's taboo to admit it and I know alot of people would never dive a Rebreather without one, BUT how many of you rEvo divers dive without a BOV? And I'd be interested in hearing your thoughts about why and why not.
Thanks,
Tony

silentscuba

Hi Tony- I have been diving a KISS Classic for four years now and have very much liked the BOV.

I just became a rEvo diver and was thinking about putting a BOV on that unit also.

However, after using the rEvo for awhile and seeing how you can do a really good, quick Dil flush with the Dil button located on the bottom left side of the case, I am not sure if you really need one.

On most all the other units out there, when you are doing a Dil flush, you have to move the freshly added Dil through the loop by breathing in and out a few times, and in some cases activating an ADV.

With the rEvo, you just loosen you lips, push the button and you have fresh instant Dil ready for you to breath and it pushes itself through the loop.

Just my thoughts.

__________________
Curt McNamee
rEvo CCR Diver
KISS CCR Diver
www.silentscuba.com

Gilles

The only disadvantge a BOV brings is a marginal amount of extra kit and plumbing.

When CO2 induced fear, confusion, and resulting incompetence sets in, the simplicity of a valve twist, under all scenarios and circumstances is a god send.

You'll also make your own rescue much more simple, with much improved success chances, when all a would be rescuer needs to do is twist a knob for you (assuming you are using a FFM or a good neckstrap).

There's been too many accident reports lately to consider not using a safety feature that has near unanimous support from the Rebreather community.

IMVHO, the value of this peice of kit is greater than its cost and complication. This especially if you are new to Rebreather.

__________________
Gilles
http://www.dirrebreather.com

Tyler S.

I did about 50 dives on my rEvo without a BOV, recently I added a Golem BOV and have been very happy with it. As Curt said, a dil flush is easy and quick. I would still dive the rEvo without a BOV but I think the BOV makes a bail out pretty smooth.

tony13

Good info everyone. I know your life is worth more than the cost but sometime you have to make a decision and draw the line. If (read as when) I go with a rEvo the cost of everything is quite large, and while I personal want a BOV on my unit I need to wait to get one. So diving without one for a while is what I'll be doing. Hopefully Paul comes up with some new sleek design by the time I'm ready.

paulraymaekers

as stated above, you can do a full dill flush in 2/3 seconds

due to the position and form of the counterlung, you go vertical in the water and just push the dill button, and let it leek at your lips

in this position, the counterlung is vertical, and the waterpressure drives out all the gas from the inhale lung in seconds

I'm not convinced the BOV is an absolute must on a rEvo, but sometimes market decides different...

btw, a good standard DSV often breaths better than a BOV...

paul

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.... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...

Mark Chase

BOVs make bailout easy fast and reliable. They encourage sanity breaths, they allow you to easily add off board diluent into the loop, They allow you to run your bailout as semi closed. They allow the use of large off board tanks for deep diluent flushes if required.

The only down side is the weight in the mouth and the cost. Neither issue being life threatening I see it as a no contest.

I would no longer choose to dive a unit without a BOV and a HUD.

My old V4Tec and my current Golum both breath well enough for me to stay on them rather than switch to an OC off board reg.

An ultra light compact BOV would be nice.

ATB

Mark

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RAL

2 to 3 seconds can be an eternity. Why not add a BOV as an option? If you do not wish to make them in house you likely could work out a deal with Golum gear, everyone seems to like that unit.

RAL

__________________
The sea does not care about you.

paulraymaekers

and that breaths perfect in both CC and OC..

the closer we come to this, the more I would consider it eventually..

for real dives, more taskloading, I prefer a FFM over a BOV,

I have a panorama, with the OC on my right input, with a shut-off valve

if I want to take a fresh breath, I inhale by nose

but for small dives, or teaching, FFM is not a valid option, to much hassle

paul

__________________
www.rEvo-rebreathers.com

.... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...

paulraymaekers

you COULD be right :-), but first try it on a rEvo, or ask people that did it on a rEvo: it really goes like nothing..

adding a BOV also complicates your setup a bit, the breathing hose is a bit less flexible, do you connect it to in- or outboard gas, do you switch the gas of your BOV when you go down with hypoxic gas or not..

conc inhouse or third party, drawings are in the computer, but Jakub knows I'm waiting to test the new small BOV, once it's available

paul

__________________
www.rEvo-rebreathers.com

.... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...