Scubapro chrome plated brass regulators...

[Umuntu]

But what is very nice is the extremely smooth progression between closed and fully open valve you perceive breathing. No "woosh" effect or on-off effect. It is this perfect proportionality which I love more in these regs, it invites you to breath properly.

I know that whether a person likes how a regulator breathes is very subjective ... and sometimes it takes getting used to and also adjusting the way one breathes. I remember that the first time I tried a Poseidon upstream valve regulator I really didn't like it. The whoosh of air rushing into the lungs was a big surprise. I had to change the way I breathed in order to appreciate it.

Personally I like the way the Apeks XTX breathes more than my SP 600. And both are a little better than my 156, but I still enjoy diving with the 156 and 109BA. They are also good.

 

[Open Ocean Diver]

Installed plastic vane, 10mm inside mouthpiece, 15mm angled in the case over the air tube.

Cracking .7, flow .5 lpm, difference of .2 H2O
@10 SCFM .2 H2O difference of .7 H2O from last experiment.

 

[Umuntu]

Installed plastic vane, 10mm inside mouthpiece, 15mm angled in the case over the air tube.

Cracking .7, flow .5 lpm, difference of .2 H2O
@10 SCFM .2 H2O difference of .7 H2O from last experiment.

Now those are interesting !I!

The H2O is going down at higher air flow, so the venturi is working.

What about its tendency to free flow ?

Have you tried breathing it to see how it feels to breathe?
But please only do this if your vane is very secure. You don't want that piece of plastic at the entrance to your lungs !

I can't wait for that sheet of thin brass I ordered to arrive

 

[Open Ocean Diver]

Oh cool brass see if you can make it adjustable.

I’ll install the mouth adapter and try subjective breathing.

 

[Umuntu]

Oh cool brass see if you can make it adjustable.

I’ll install the mouth adapter and try subjective breathing.

My intention is just a simple venturi vane, similar to the Apeks design.

And then I will have a "156V"

 

[Open Ocean Diver]

Love that 156V

Still no free flow after pushing in the purge.

 

[Umuntu]

Love that 156V

Still no free flow after pushing in the purge.

Then it's definitely an improvement worth pursuing

 

[Angelo Farina]

Then it's definitely an improvement worth pursuing

This mod was first introduced in the sixties by Raimondo Bucher, who started modifying standard regulators inserting a vane, creating the Venturi effect.
This idea was later exploited by Luigi Ferraro and Jacques Cousteau in the Inject regulator, manufactured by Technisub, the company they founded together. Probably in the US this regulator was commercialised by La Spirotechnique (also owned by Jacques Cousteau).

 

[lexvil]

Next if you could get the vane so you can adjust it via a little protrusion, say near the mouthpiece, so it can be tuned as needed. Since brass is thin sealing the protrusion may be difficult, maybe maybe make the case out of some reinforced synthetic material then you can do away with the clamp and do a direct threading of the cover...

Maybe come up with a catchy name like G as in WOW and add a number, something like “250”...

Now we need to figure out how to move heavy things along a pathway.

 

[Open Ocean Diver]

Like the Venturi, we have that too.