Question / Valves on a PST 100??

[wheezy]

Just wondering.... I'm just beginning my homework of researching a tank for myself. Sick of waiting for the shop to open to rent a tank, or showing up too late and driving back home.

Anyhow... looking at the Faber 100 and the PST 100 based on numbers.... however it just donned on me that both of these are HP tanks and I found myself questioning my own SCUBA knowledge. Stumped myself. Do ALL HP tanks come with a DIN valve or is it possible to get either the PST or Faber with a traditional yoke???

or I could wait til tomorrow and call my LDS.....

thanks

 

[jonnythan]

"Standard" yoke valves can only be used for service pressures of 3000 psi or less. An HP tank, with a typical working pressure of 3500 psi requires a DIN.

 

[Spectre]

jonnythan once bubbled...
"Standard" yoke valves can only be used for service pressures of 3000 psi or less.

Actually it's 3300. AL 100s have a working pressure of 3300. There is also a 3300 PSI steel 120 I saw at a local shop. It had a K valve, and I'm not sure the vendor...

 

[thethumper]

Spectre once bubbled...


Actually it's 3300. AL 100s have a working pressure of 3300. There is also a 3300 PSI steel 120 I saw at a local shop. It had a K valve, and I'm not sure the vendor...

Actually Spectre my Catalina AL 80's are 3300psi w/3300psi Catalina standard K valves. My LDS will normally pop 'em to 3600psi.

 

[mer]

I just bought tanks and went through the K-valve (AKA Yoke) vs. DIN value debate. My tanks are steel 80s with a working pressure of 3180, the 10% overfill brings me up to almost 3500. From my training I though this would require a DIN valve, but my LDS said that I could get away with a yoke.

The dealer/instructor I've been working with has the same set up with a yoke and they pulled many examples off the service rack of tanks with pressures such as this. The warning they gave me was to be careful to not bang the first stage for the first couple of minutes of the dive. The point of the DIN valve is a more secure connection between the first stage and the tank valve. After the first couple of minutes (or just from cooling down to water temperature) the tank pressure is below 3300 psi.

I went with the K-valve because
1) it doesn't trap water, therefore is less likely to force water into the tank during a fill
2) it is more universal, therefore I don't have to convert my reg back over from DIN when travelling
3) it isn't a significant sacrifice in safety

Just my 2 cents.
Mer

 

[thethumper]

lets throw a wrench into this discussion. There are also LP DIN valves that have a screw in adaptor (included) that allows for the option of DIN or Yoke. I dive w/Poseidon Odins & they are a DIN regulator w/a A clamp (yoke) adaptor. I like the DIN connection for the simple reason I dive in overhead environments (ie cave/caverns) & I have seen people hit the overhead & actually bend the Yoke or get the tension knob get entangled in the reel line.

Just my thoughts on the matter.

 

[mer]

I didn't mention it before, but I did explore getting DINs and using a yoke converter on vacation. The problem is that it puts the first stage 1 - 1.5 inches closer to the back of your head/neck. If you're small like me, that becomes a problem. That's another reason I went for the yoke set-up.

But then again, my set-up is not for overhead environments b/c it is a yoke with potential for high pressure. But I don't plan on ever doing overhead environment diving.... but that's another story for another day.

 

[thethumper]

mer once bubbled...
I didn't mention it before, but I did explore getting DINs and using a yoke converter on vacation. The problem is that it puts the first stage 1 - 1.5 inches closer to the back of your head/neck. If you're small like me, that becomes a problem. That's another reason I went for the yoke set-up.

But then again, my set-up is not for overhead environments b/c it is a yoke with potential for high pressure. But I don't plan on ever doing overhead environment diving.... but that's another story for another day.

should clarify myself. When I say the DIN/Yoke valve has an adaptor, I mean the adaptor is like a theaded plug that srews into the DIN valve & effectively turns the DIN valve into a regular Yoke style valve. OMS is set up like this. check this link for visual.
http://www.omsdive.com/valves.html#VALVE

 

[roakey]

thethumper once bubbled...
should clarify myself. When I say the DIN/Yoke valve has an adaptor, I mean the adaptor is like a theaded plug that srews into the DIN valve & effectively turns the DIN valve into a regular Yoke style valve. OMS is set up like this. check this link for visual.
http://www.omsdive.com/valves.html#VALVE

Only true for 200 BAR DIN valves. 300 BAR DIN valves are deliberately too deep for the “donut” to make a seal.

Roak

 

[thethumper]

roakey once bubbled...

Only true for 200 BAR DIN valves. 300 BAR DIN valves are deliberately too deep for the “donut” to make a seal.

Roak

Roak I think the aim was for a LP tank.