is a 300 bar tank with a 232 bar valve ok?

[DevonDiver]

Ah, it's the whole 'driving on the wrong side of the road' issue again.

 

[Leadking]

I think the big confusion is that the rest of the world has true 300 bar tanks, whereas in North America we dont have 300 bar tanks, but we do use 300 bar valves/regs. Over here, the max pressure of any common tanks is about 240 bar, so we just put whatever valve we want in it, and fill it to the pressure listed on the side of the tank.

We DO have 300 bar tanks. Luxfer makes a fiberwrap aluminium
Luxfer: SCUBA Cylinders

 

[Jimmer]

Good point Lee, I knew about that one actually, but figured it didn't matter much as they are anything but common. Do you happen to know what valve they come with?

 

[Leadking]

Good point Lee, I knew about that one actually, but figured it didn't matter much as they are anything but common. Do you happen to know what valve they come with?

300 bar 7/8 inch thread.

300 bar HAD to be used in anything above 3442, that's why you see them. I used to dive with a Divator in the '70's, which also used a 300 bar valve they were rated at 4350psi and the tanks were made by PST. 300 bar tanks are out there. but they're not common.

 

[Jimmer]

300 bar 7/8 inch thread.

300 bar HAD to be used in anything above 3442, that's why you see them. I used to dive with a Divator in the '70's, which also used a 300 bar valve they were rated at 4350psi and the tanks were made by PST. 300 bar tanks are out there. but they're not common.

I knew it was 7/8" but do you know what brand? I have several friends still using 3500 psi tanks with 7/8" threads and not liking the "slant back" sherwood valve.

 

[Diver0001]

Good point Lee, I knew about that one actually, but figured it didn't matter much as they are anything but common. Do you happen to know what valve they come with?

Well... in Europe I"m pretty sure that a 200 valve won't even screw into the neck of a 300 bar tank. There are good reasons for this. They've even gone so far (thankfully it isn't a law yet) that nitrox regs won't fit on a valves for "air" tanks.

The standards in other places seem to be quite different so I apologise if I got my panties in a bunch for nothing. I assumed that the op wanted to essentially "cross thread" a 200 bar valve into a 300bar tank.

As for DIN, it would appear that that 200 and 300 bar standards are pretty universal.

Regarding Jimmer's assessment (which is better informed than mine, i'm sure), that the proposed stop gap measure would work, I"m sure he's right provided the valve will screw normally into a 300 bar tank and you don't pump it up to it's maximum operating pressure.

R..

 

[myscubastory.com]

Yea those din things tend to be better at higher pressures. Then again the standard was invented by the germans!

 

[Diver0001]

... who also gave you the diesel engine, the Audi, BMW, Mercedes and sausages!

In Europe, the Germans have earned (and rightfully deserve) a reputation for building products that are made to last. The DIN coupling is their invention too.... not because they are german, but because nobody else cared enough to make a standard that could... (to put it in diving terms) ... hold water.

R..

 

[Leadking]

Not to mention WWI and WWII!!!!

... who also gave you the diesel engine, the Audi, BMW, Mercedes and sausages!

In Europe, the Germans have earned (and rightfully deserve) a reputation for building products that are made to last. The DIN coupling is their invention too.... not because they are german, but because nobody else cared enough to make a standard that could... (to put it in diving terms) ... hold water.

R..

 

[Diver0001]

Not to mention WWI and WWII!!!!

Get over it. That was a LONG LONG time ago