3442 PSI Tanks

[seansrs36]

I just recently purchased a 3442 psi tank. I was told that I could use my yoke regulator on this tank. I went to get it filled at a different dive shop the other day and they would only fill it to 3000 PSI. Can the scuba gods out there please enlighten me..should I switch from Yoke to DIN?

Thanks,

Sean

 

[The Kraken]

Just for strength and intergrity sake I'd make the switch, but a LDS of mine regularly fills my E7-80's to 3700 psi.

the Kraken

 

[bradshsi]

I went to get it filled at a different dive shop the other day and they would only fill it to 3000 PSI. Can the scuba gods out there please enlighten me..should I switch from Yoke to DIN?

As the Kraken says the switch to DIN is up to you (personally I use DIN). However provided your yoke and 1st stage equipment is rated for 3442 there is no mandatory reason why you would have to switch.

However the same holds true for the dive shop. It could be that their equipment is only rated to 3000psi and so they cannot or will not fill to more than this.

 

[SharkRider]

Manufacturers of HP tanks (any tank over 3000 PSI) recommend using DIN only. This means that all tanks with a PSI rating above 3000 should only have DIN valves in them.

With that said, I have AL92's that shipped with standard K valves in them. These tanks are rated to 3200 PSI. Generally speaking, most tanks have a +10% overfill rating... meaning a 3000 can go to 3300, a 3200 to 3520 etc... all with standard valves.

The new HP tanks, the 3442's are not much different. A shop that only fills to 3000 is being run by morons... because a 3442 is no different than a 10% overfill on a 3200.

With all of that said, there must be a reason that HP tanks have manufacturer recommendations for DIN. I just can't fathom what they are. In theory the higher PSI causes more wear and tear on the valves, but I haven't seen this cause a problem yet.

Ken

 

[seansrs36]

The dive shop told me that the Yoke is only suppose to go to 3000 lbs and would only fill it to this..from what I have been reading and so forth you do not need to go to DIN until 3500 is this correct?

Thanks

 

[jonnythan]

Their connector may only be rated for 3000 psi.

The majority of 3442 psi tanks ship with a convertible DIN/Yoke valve that can be used with either connection, and it is rated to the full 3442 psi.

However, lots of people seem to think that anything over 3000 psi requires DIN, which is simply not the case.

 

[Warren_L]

If you have a DIN convertible valve, just take the insert out and have them fill it. Shouldn't be an issue if that's all it is.

 

[rhlee]

Clearly this claim is false; my reg has "4000 psi" cast right onto the yoke:

http://www.xsscuba.com/news_testers_choice.html

"... a yoke rated for 4,000-psi cylinders"

 

[jonnythan]

Clearly this claim is false; my reg has "4000 psi" cast right onto the yoke:

http://www.xsscuba.com/news_testers_choice.html

"... a yoke rated for 4,000-psi cylinders"

Some, but not many, yokes say "3000 psi" on them.. those at my LDS included.

 

[Spratman]

I agree with Jonnythan. All the yokes I've seen are rated in BARS, not PSI.

I just purchased a Tri-Metal reg, that you are talking about. I'm not exactly sure how they come to that (4000psi rating), since the yoke valve is stamped 232 bar, which equates out to 3442psi. I think it's some slight of hand in the advertising perhaps.

I'll check again at home, but I bought the DIN adapter for it, so it pretty much makes the yoke a non-issue for me. I do have an older Genesis E-7 120 3500psi tank with a DIN valve and am trying to will be buying new tanks in the future with with DIN/yoke capability.