Old PST 96 info?

[wedivebc]

I recently rented a tank that was suppose to be a steel 96. When I looked at it I saw what appeared to be an old 72 until I looked at the pressure rating of 3000psi. The owner said they were available for a short time but discontinued. I took out my trusty calculator (I'm on vacation remember) and low and behold a 2250/72 pumped up to 3000psi yields a 96 cuft tank. It was a great tank and I for one would like to find one. Anyone have some more info on these tanks?

 

[David Thiesfeld]

Here you go:

95.25 CF @10% overfill
length 25.00 inches
diameter 7.00 inches
empty weight 39 lbs.
bouyancy empty -6 lbs.
bouyancy full -13.3 lbs

Regards

 

[wedivebc]

Here you go:

95.25 CF @10% overfill
length 25.00 inches
diameter 7.00 inches
empty weight 39 lbs.
bouyancy empty -6 lbs.
bouyancy full -13.3 lbs

Regards

Great thanks, so how come they don't make them anymore?

 

[Ray2]

Wedivebc,
I have one too and love but can,t find another one anywhere.I believe it was made for Sherwood back in the 70's,its only a 95 if you pump it to 3300 psig which should'nt be a problem.I'll try and find the chart with all the specs.
Diverlink.com list it near the bottom of the tank spec. listing.
Ray

 

[montyb]

All:
So what would it be if it was just pumped to 3000psi. (ray2 - I sent you a pm)
I also have one, I'm pretty sure.
Montyb

**Found the answer on diverlink.com - at 3000 psi it would hold 88+ cf

 

[Rred]

At this late date...
I have a Pressed Steel (PST mark on tank, although they are often called PSI) 96.2 cf tank, US DOT 3AA rated at 3000psi with a + rating. They were never popular (~1985) because they COST MORE and they WEIGHTED MORE although a diver who knew how to do math would realize they actually let you take about 10# off your weight belt compared to an Alu80, so the "heavier" tank requires actually less weight because it is not positively buoyant when empty.
Between the cost and the industry attitude of "Oh, steel, that rusts" which was only seen as a problem until they found aluminum tank necks with stress cracks to condemn...ooops...they were simply ahead of their time. You'll still see them come up for sale as used tanks from time to time but by now, a modern HP steel (like Faber) can do a slightly better job. Smaller, lighter, same advantages.