Self Contained Diving by René Bussoz

[Diver0001]

Uncle Pug once bubbled...
I have several J-valves... one has a pressure indicating rod that gives an indication of the cylinder pressure... just not during the dive.

Pictured is a J-valve that I still use on occassion though the rod is not on the reserve lever either in this picture nor on dives. I use an SPG.

I was surprised to find out recently that Aqualung used to make a regulator with a J valve built right into the first stage. I had only ever seen the ones on the cylinder.

Check out this picture of an old Calypso with the J valve right on the first stage:

R..

 

[Uncle Pug]

... I feel fine. Hope you are well too.

Back to using a J-Valve.

I use one on my little single steel 72 with a plastic backpack.

 

[Uncle Pug]

Diver0001 once bubbled...
a regulator with a J valve built right into the first stage

 

[pipedope]

I own and have owned several J valves.

Just happened to be the best deals at the time.
I did start using SPGs in 1980.

Hmmm I wonder if I can get a DIN J valve????

 

[Bob3]

I wonder if I can get a DIN J valve????

Hey, how many ya want?
You should know better than to ask a question like that, some folks take that as a challenge. :tease:

 

[Uncle Pug]

Bob3 once bubbled...
Hey, how many ya want?

Figures.

 

[Arnaud]

but in 1983, when I was first certified in France, that's all we had. No SPG and no BC either. And a few UW signs that are not taught anymore.

Anyway, regarding the initial discussion, I'm not sure that relying only on an SPG or a J valve for gas management is the way to go. But you guys know that already...

 

[Uncle Pug]

Arnaud once bubbled...
I'm not sure that relying only on an SPG or a J valve for gas management is the way to go. But you guys know that already...

The J-Valve is fine for weenie dives... if well maintained.

For dives that are more substantial it is wise to pre-plan the gas requirements and use an SPG.

 

[quimby]

Pug looks like you have 2 1/2 J's The USD appears to have short stem itis

 

[Uncle Pug]

quimby once bubbled...
The USD appears to have short stem itis

The top of the stem with the wing is broken off... I doubt I'll spend much time looking for a replacement stem.