J-Valve to an Al80

[Wetsuit 4 life]

I want to change the valve on my Al80 from its K-Valve to a J-Valve, how before I go and find the J-Valve I want to know if this will work or not or should I just get a steel 72 and save myself the time and trouble? My real problem would be can a J-Valve support a 3000psi tank or not?

Thanks

 

[mike_s]

Some J-vavles might support it while others won't.

the pressure rating is also not just the valve but the 'burst disc' that is in the valve.

If you've got an older valve with the 2250psi burst disc in it, you should be able to change it out with a 3000psi burst disc. (someone please correct me if I'm wrong).

 

[herman]

I have a couple of 80s with J valves. As long as the burst disks are correctly rated, it's a simple screw one out and another in change.

 

[DoubleHoseDiver]

What herman said. very easy to change the burst disk and valve out. Tim

 

[Nemrod]

Look for a later model Sherwood or Dacor J valve. The Dacor type show up regular enough. I would change the burst disc, also adjust the "come in" pressure for the reserve to a higher value.

Yeah, really, just find yourself a steel 72, to go with the 80.

N

 

[widget]

Theres no problem changing out the valve as has been suggested. I also concur, change out the burst disc and you should be set.

..........but I am just wondering, "Why do you want to change the K valve out with a J valve" - Maybe I am missing something, (its late ) but if you dive with an SPG, I cant see any advantage in the swop.?

 

[dpbishop]

..........but I am just wondering, "Why do you want to change the K valve out with a J valve" - Maybe I am missing something, (its late ) but if you dive with an SPG, I cant see any advantage in the swop.?

The advantage is that a J valve lets you experience all the thrills and excitement of a OOA event without the inherent danger.

 

[Wetsuit 4 life]

I don't plan to use a SPG, the J-valve is for when I have my double hose regulator working

 

[billsreef]

The advantage is that a J valve lets you experience all the thrills and excitement of a OOA event without the inherent danger.

I remember those days It was quite common to get to that hard breathing low on air point, reach back to open the J valve and find it was already open on it's own :amazed:

 

[captain]

I remember those days It was quite common to get to that hard breathing low on air point, reach back to open the J valve and find it was already open on it's own :amazed:

J valves opening on their own is like a gun firing for no reason. If you had checked the J valve as often then as as you check an SPG now there should be no surprises.