Tank Valve Leak.....?

[grf88]

If it is a casting flaw I would be more concerned about the fact that there was a potential fragmentation grenade at the back of my head than the potential for air loss.

 

[eeel]

The manufacturing process for older Sano-Sub (OMS) valves had the gas passages drilled out of the original casting right down through the top of the valve. The hole in the top was then brazed over once the machining process was complete. The brazed area is usually visible as a small circular flaw in the chrome plating. These tiny leaks were rare, but enough that Sano-Sub did change the machining process and newer valves are no longer drilled down through the top.
I have seen several of these valves leak over the years, but never heard of one actually cause any problems. That said I had the opportunity to buy at a very good deal an old OMS manifold very that the owner disclosed had this flaw, and although tempted, I passed.

 

[Agility]

200 bar and leaking right behind my head, I'd be scared to use it.

 

[Bob DBF]

If I have a leak in a tank valve, I fix it. If it can't be fixed I replace it, 2250 to 3445# of air pressure has my respect. Besides, it is my gas that is being wasted.



Bob
-------------------------------------
There is no problem that can't be solved with a liberal application of sex, tequila, money, duct tape, or high explosives, not necessarily in that order.

 

[PfcAJ]

trash can.

sorry

 

[Dr. Lecter]

JB Weld?

Just kidding, trash can for sure.

 

[ermaclob]

Yea, ima get a new one.... Any one got one ?

---------- Post added November 19th, 2013 at 05:35 PM ----------

The manufacturing process for older Sano-Sub (OMS) valves had the gas passages drilled out of the original casting right down through the top of the valve. The hole in the top was then brazed over once the machining process was complete. The brazed area is usually visible as a small circular flaw in the chrome plating. These tiny leaks were rare, but enough that Sano-Sub did change the machining process and newer valves are no longer drilled down through the top.
I have seen several of these valves leak over the years, but never heard of one actually cause any problems. That said I had the opportunity to buy at a very good deal an old OMS manifold very that the owner disclosed had this flaw, and although tempted, I passed.

pretty much whats happening, the ding ends right at the edge of that imperfection, so it spews a little bit of gas from the edge.