No 300 bar DIN valve for LP tank?

[Juris Diver]

After reading all the posts on this board recommending LP 104s, I decided to look into it. My LDS (Sport Chalet) says 300 bar DIN valves are NOT available for LP tanks. They say you have to go with a 200 bar DIN valve. Is this a bunch of crap?

:newbie:

P.S. On this upcoming Memorial Day, let's not forget to remember Sept. 11.

:tribute:

 

[metridium]

Originally posted by Juris Diver
After reading all the posts on this board recommending LP 104s, I decided to look into it. My LDS (Sport Chalet) says 300 bar DIN valves are NOT available for LP tanks. They say you have to go with a 200 bar DIN valve. Is this a bunch of crap?

Lemme put it this way: they definitely need breath mints....lots and lots of strong breath mints.

I have 300 bar DIN valves on my PST LP104s. No worries.

 

[WreckWriter]

I think Sherwood makes a 300 in 3/4 inch. If not, go with a Scubapro 200, you won't notice the difference. I use Scubapro 200s on both my stage bottles, they're rock solid valves.

Tom

 

[metridium]

Another option is to buy the 104s without valves, then order modular K-valves or H-valves and/or manifold from another source.

Check out the offerings from Dive-Rite, Halcyon, and Sea-Elite.

 

[Uncle Pug]

Originally posted by Juris Diver
Is this a bunch of crap?

Yes...
Time for a new LDS...

 

[Scubaroo]

I've been doing some hunting around on an Australian dive board - a 2400psi LP tank is very rare down under. Apparently the norm for a "LP" steel tank is 207 bar, which is 3000psi, and a "HP" tank is 228 bar, which is 3300psi. Tech divers use 3/4" NPSM (same as 3/4"-14NGS) 300 bar DIN valves on both. A 232 bar valve is also available, presumably the same thread depth as a 200 bar DIN valve you would see stateside.

A number of people have come to this board with "advice" from that particular LDS that they've had to question... and have answered correctly.

 

[The Chairman]

There are no 200 bar valves that will fit a 300 bar tank. (Safety concern!)

There are plenty of 300 bar valves that will fit a 200 bar tank.

Except maybe for aesthetics, 200 bar DIN or yoke valves are perfectly serviceable on a 200 bar tank. There is no added safety value in having a 300 bar valve on a 200 bar tank. There is no additional danger of the Din becoming unscrewed under pressure, and there are other weaker points in the reg if it sustains a hit (the shorter DIN fitting will probably not break first).

That being said, it is possible that your LDS does not have access to a 3/4" 300 bar DIN. OR, they don't see the need to stock it. Or... well there are just TOO many "or"s to get them all into the water.

 

[Juris Diver]

The manager of the shop says he teaches technical diving, yet he says he's never heard of ANYONE requesting a 300 bar DIN valve on an LP tank. I told him to check out this board!

This is the same guy who, when I asked him what his setup is, couldn't remember his tank manufacturer or the type of first stage he uses. All he kept talking about was how he uses a long hose a wraps it several times around his head. <shrugs>

Anyway, he says his "supplier" can't get 300 bar DIN because they don't "fit" on LP tanks. He says he can "put a 200 bar DIN on if you want." Said something about how even if 300 bar DIN was available for an LP, the burst disk in a 300 bar DIN valve is unsafe to put on it.

Whatever.

 

[roakey]

Originally posted by Juris Diver
I told him to check out this board!

Better yet, have him check out:

http://www.cpostores.com/diverssupply/search.htm?step=2&viewfrom=1&numresults=10&searchterm=manifold

(I hope that isn't a page that times out).

Note that both the 200 BAR and 300 BAR vales are available in 3/4 thread.

Show him the page, and then order from that page since your LDS appears unable/unwilling to get one for you. The SeaElite is an excellent manifold.

Roak

Ps. I have 300 BAR DIN on my doubles (low pressure 104s) as well as all my stage/deco bottles (AL80s & AL40s).

 

[Uncle Pug]

Originally posted by roakey
I have 300 BAR DIN on my doubles (low pressure 104s) as well as all my stage/deco bottles (AL80s & AL40s).

Me too....
Shoot... I even have 'em on the 6 cf argon bottles...
Standardization ya know...