HP vs LP

[Bobby]

Do 300 bar tanks actually exist?

I wouldn't call 232 bar "low pressure" either..

Yes they exist and the funny thing is that the steel tanks that are LP in the US are 300 bar in europe (actually just below). The Fabers are rated to 4K over there and 2640 here. That is why a lot of people don't have an issue with over filling the LP tanks.

 

[mweitz]

A high pressure steel tank (PST E7-80), at nominal pressure, holds approximately 80 cu. ft. of air. This tank is 8.00" in diameter and approximately 20" long.

Actually I think the E7 series tanks are 7.25" dia. Not exactly the same as the AL80's but very close.

Mark

 

[The Kraken]

8 inches - trust me on this one.

 

[geraldp]

I have yet to find this in a huge range of LDS's in FL i have taken tanks into. They might take a little longer or require them to have a full bank, but they should have that anyway.

I have seen that for some of the super high pressure tanks (my buddy has a 109 @ 4500psi that is fiberglass wrapped) there are many fill stations in Oregon/Washington that can't (or won't?) fill it to capacity.

Jerry

 

[simbrooks]

I have seen that for some of the super high pressure tanks (my buddy has a 109 @ 4500psi that is fiberglass wrapped) there are many fill stations in Oregon/Washington that can't (or won't?) fill it to capacity.

Jerry

I was commenting in response to filling to 3500psi (US HP mark) at LDS's, its not hard and those shops that suggest this as a reason to buy their steel LP tanks are just trying to make a sale. 4500psi is pushing it as that is what most banks seem to be pumped up to.

 

[simbrooks]

8 inches - trust me on this one.

IF you are talking of the E7-80 its 7.25" - DRE specs on PST, if you are talking of the old LP80 they might be 8" dia, but according to Lloyd Bailey (who personally i dont like, but his site has some useful info) they are 7.3" as well and were repackaged as E7-100 tanks.

 

[jonnythan]

8 inches - trust me on this one.

Definitely not 8 inches.

Trust me on this one.

(Hint: ever wonder what the '7' and '8' in E7/E8 mean?)

 

[RDP]

Sometimes near positive, isnt the rated volume (or at least quoted volume by the manufacturers) at the plus rating?

No idea how this comment pertains to what I said. I didn't even mention plus ratings. My answer was general.

I have yet to find this in a huge range of LDS's in FL i have taken tanks into. They might take a little longer or require them to have a full bank, but they should have that anyway. Swapping your connector out to a DIN from a yoke might cost about $50 at most (mostly for parts) and is quite quick. I prefer DIN anyway, but have an adapter for yoke so i can swap back on rental tanks if i am ever away from FL.

The pressure thing at fill stations where I am has been an issue for some. FL is a dive capitol. Also, I agree the usual Din swap is $50, but there is the cost of a din to yoke conversion as well, at least $35. These were only mentioned as things to consider.

 

[jonnythan]

No idea how this comment pertains to what I said. I didn't even mention plus ratings. My answer was general.

You said 2400, when most LP tanks are 2400+ or 2640. PST and Faber LP tanks are rated at 2640, not 2400.

It took me a minute to figure out what he meant too.

 

[The Kraken]

Ooops !!!!
I'll be over there --------------------------------------------->

Mea culpa . . .
The E7-80 is 7.25" in diameter.
I had my E8-119's on the brain.

Johnny-Wan-Kenobee, you are my only hope!!! Please forgive me.

:ignore: