J valve rated pressures?

[Waterwulf]

I like J valves and use them regularly. But, I've only ever used them on steel 72's with the lower pressures. I just got a brand new Aluminum 80 and want to use a J valve on it too. It's freshly serviced and I have a 5K burst disk to put in it. What are the pressure ratings on J valves? One is a Sportsways and the other is a US Divers. Can I use one of them for the higher 3K pressures? Thanks

 

[James79]

I prefer to run my 72s at 2800 or 3k... No problems with J valves yet. Just looking at how the mechanism works it should be a non issue.

 

[Waterwulf]

Thanks. I was pretty sure it would be fine at 3K psi but wanted to make sure.

 

[rx7diver]

J-valves were still being used when Al 80's began being used.

rx7diver

 

[tursiops]

@Hoyden

 

[Waterwulf]

J-valves were still being used when Al 80's began being used.
rx7diver

Yeah, I remember that but I personally have never used an 80 with a J valve so I wanted to be sure. I have a 5K burst disk on the way for it.

 

[Cthippo]

What is the actual (approximate) burst pressurenonna LP tank? 5k psi is over twice the rated pressure for a LP72. At what point does this actually become dangerous?

 

[happy-diver]

Considering two of my German Double hose regs are rated at 300bar with a din fitting
Having installed a heavy duty yoke on one of them, lets me use it with a Dacor J valve.

 

[James79]

What is the actual (approximate) burst pressurenonna LP tank? 5k psi is over twice the rated pressure for a LP72. At what point does this actually become dangerous?

I presume he means a 5K burst rating on the burst disk. He intends to use the valve on an AL80 (3k working pressure). Hydro testing is done at 5/3 working pressure. He's installing the appropriate burst disk for the tank the valve is going on.... So I'd say not dangerous at all.
Of course, I put 5k burst disks in valves that I put on 72s.... Doesn't mean I fill them to 5k. Just gives me more head room when I fill them to 2800.

Respectfully,

James

 

[Waterwulf]

The 5K psi burst disk is going in the valve for the Aluminum 80 tank because it will be run at 3K psi. The 72 is getting a new 3750 psi burst disk because it will be pressurized to 2250 psi. 5/3 ratio on both of them.