Why 300 BAR / 4350 PSI Steel Tanks aren't so popular....? should be a winner - no ?

[yaronad]

I'm about to buy a new/used steel tank.....and was thinking about 300 BAR / 4350 PSI steel tanks.


Have some questions....to the heavy cannons here
and of course to whom that knows:


1. I'm getting the feeling that the 300 BAR / 4350 PSI steel tanks?
are not popular....am I right ? If yes - why is that?


2. I Couldn't find a short 12L(100 HP) 300 BAR / 4350 PSI steel tanks....only the long versions ? is there a technical problem with short 300 BAR / 4350 PSI steel tanks


Thx in advance

 

[kwinter]

One reason they are not popular is because many shops won't fill to those high pressures. Too much wear & tear on the compressor.

 

[Dr. Lecter]

Where are you finding 300 bar tanks? Generally the HP steels in the US are 230 bar with either 230 bar or 300 bar DIN valves--they're 3442psi or maybe the older 3500psi tanks with DIN valves capable of handling higher pressure tanks.

 

[Akimbo]

Depends where you are... are you in Europe? They are pretty rare in North America. My all-time favorites in cold water are the AGA 324s, now Interspiro

324 = 300 Bar, 2 cylinders, 4 Liters each for about 80 Ft³

 

[kwinter]

And of course there are the carbon fiber SCBA tanks at 4500 psi for firefighters that some folks use for rebreathers.

 

[NAM001]

those 4500 psi tanks weigh a ton.

 

[TryOutDive_com]

Here in Germany you find more and more shops with 300bar
300barshop

 

[Vinge86]

In norway there is a lot of 300 bar. My 12 liter 300 bar tangs weigh 18,5 kg empty. If i where to use that tank in warmer waters without a suit, i would be 4-5 kg to heavy in the water without any weights.

 

[yaronad]

Depends where you are... are you in Europe? They are pretty rare in North America.
My all-time favorites in cold water are the AGA 324s, now Interspiro

I'm from Israel....and most tanks here are imported from Europe (Faber make)
Your setup looks amazing

those 4500 psi tanks weigh a ton.

I too thought it is Probably one of the main the reasons ....but actually I doubt that...
It weighs 16Kg~ for a 10L tank and about 18L (with valves) for the 12L tanks.
About 2kg /4p different than the regular ones.


And don't forget that on the other end you use less weights

Here in Germany you find more and more shops with 300bar
300barshop

Thx! looks good ....
I found there a short 12L/300 bar version steel tanks ( I think....it looks like that in the picture)
2 question about those tanks:
>> The manufacture / Brand looks unknown ...no?
>> unlike the long versions Operating pressure 300 bar and test pressure 342 bar the test pressure is 336 bar and not 400 bar? what is the difference? is it because of the Nitrox
> Does "Mono valve according to EN 144, DIN 477, Nitrox M26x2" mean A different Regulator needs? I have the scubapro(Din 300 BAR) mk25/s600



I still think that It should become a standart....the Din 300 Bar regulators are already there

 

[KenGordon]

I have a 12l 300 bar cylinder. It is not very nice to dive, I end up feeling more head heavy than usual and so fear floaty feet. The extra weight and so less lead seems good in theory but doesn't seem to pan out in reality. One day when very bored I will weigh it and a normal 232 bar 12 in the pool.

There are people in our club using twin 300 bar 10s. They need no lead in the sea and are always concerned about wing capacity! Others have claimed that twin 7l 300s are the perfect setup for shallow diving.

Much in diving is great in theory and rubbish in practice....

Ken