Paladin
Contributor
I would like to replace the K valve on my AL80 with a J valve and I've found a few on Ebay. My question is this: Do all 3/4" J valves handle 3000 PSI or not?
J valve
- Thread starter Paladin
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mike_s
Contributor
no..... the valve is rated for the burst disc installed. Often it's 3000psi based, but it might be otherwise... like 2400psi or 2250psi, etc.
post your EBAY links here and we'll take a look at them.
EDIT: why do you want a J valve? with modern pressure gauges, J valve requirements are a thing of the past.
post your EBAY links here and we'll take a look at them.
EDIT: why do you want a J valve? with modern pressure gauges, J valve requirements are a thing of the past.
One way of telling is that the majority of 3000 psi J valves have the J in plastic. If it's steel, it's a good chance that it's old and intended for a 2250 71.2 cu.ft. tank. You can always ask the owner. 
OP
Paladin
Contributor
I like J valves. I learned to dive using them and, when using my single hose regs with SPGs, I like the backup. Also, I just bought a DA Aquamaster and I want to dive it the way I did in the old days. I have a Healthways steel 72 with a Sherwood J valve and it has served me well for over 30 years.
Nice reg. I started with a Healthways double hose, single stage in 1964. No SPG and a K valve. Back then we had a different level of appreciation for our Buddy.
captain
Contributor
Any of the J valves will handle 3000 psi, it just a matter of putting in the correcr pressure burst disc. That is the only difference. You might want to consider the Dacor valve as they also have an HP port which is only pressurized when the valve is open so you can remove the plug and install an SPG with the tank full. A J valve is a good back up to an SPG failure.
OP
Paladin
Contributor
wondercheese
Guest
I have an aluminum 80 with a J-valve that I want to replace with a K-valve. Trade? PM me.
wondercheese
wondercheese
DaleC
Contributor
If Paladin doesn't trade I will.
I'll mail mine to you and you mail yours to me (I'll go first).
PM if you are interested.
Dale.
Gilldiver
Contributor
If you have a dive shop that has been around for a while ask if they have one. I bet they have at least a few in a box or on a condemed tank waiting for the scrap drive.
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