Yes, it can be done, but there's absolutely no reason to do so.
How does a J-valve work?
- Thread starter jpsexton
- Start date
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Ed Palma
Contributor
Surprisingly, while perusing revision 5 of the US Navy Dive Manual (2005), in chapter 7, regarding pressure gauge requirements, it states that "A cylinder with an air reserve (J-valve) is preferred." In the absence of such, that's when an SPG is required.
At any rate, since filling requires the reserve to be left open - a step that might be overlooked by the filling stations - I just took the pressure mechanism from out of the valve on my J-valve - just leaving the spring to provide tension on the stem to provide a good seal.
Otherwise, a J-valve is just as good as any other.
At any rate, since filling requires the reserve to be left open - a step that might be overlooked by the filling stations - I just took the pressure mechanism from out of the valve on my J-valve - just leaving the spring to provide tension on the stem to provide a good seal.
Otherwise, a J-valve is just as good as any other.
You ruined it. (15 character minimum is a PITA)
captain
Contributor
To good thing about a J valve is it is like someone tapping you on the shoulder and saying "You have 500psi left" if you are not watching your SPG like you should and from some of the OOA post I read that seems to be a common occurance.
jamiep3
Contributor
captain:
Even more important if your regulator dosen't have a SPG, or an octopus, or a BC inflator...
Oh no! The PADI Police are at my door!:no
james croft
Contributor
Or even, God forbid, No BC.jamiep3:
jpsexton:Thanks, it sounds like if I can find a used K-valve somwhere I'd be better off just replacing it.
Anyone have a K-valve they'd like to trade for a J-valve?
Seriously though Herman, if I don't trade it and wind up buying a K-valve your welcome to it.
I would like them, I have a steel 72 than I am reworking for my double hose reg and I would like to put a J on it. If you decide to replace them let me know.
OP
jpsexton
Contributor
Thanks for all the replies, I just dropped the tanks off for hydro/vis. I decided to just keep the J-valve and use it in the down position.
Ed Palma
Contributor
Walter:
Well, I should've also stated that the stem on the valve was so worn away that turning the handle sometimes did not turn the valve open... wouldn't want to get it stuck in the closed position... So rather than replace the stem, i just took the assembly out!
OP
jpsexton
Contributor
OK I just got my tanks back from Hydro. The J valve says Off in the up position and On in the down position. I know you guys said just leave it down but I gotta know what Off/On means. It seems backwards to me. Apparently it dose'nt mean reserve on or off.
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