2400psi yokes... 3000psi fills?

[oldschoolto]

14 yes's and 7 pizzas sounds like a great pole...

Jim...

 

[Couv]

I voted "vehement yes" for reasons given by the Masters. However, I feel somewhat shortchanged as there was no option of "vehement yes-with pizza!"

 

[John C. Ratliff]

We were using these yolks (the 2400 yolks) on 3000 psig cylinders in the U.S. Navy School for Underwater Swimmers in 1967.

SeaRat

 

[northernone]

We were using these yolks (the 2400 yolks) on 3000 psig cylinders in the U.S. Navy School for Underwater Swimmers in 1967.

SeaRat

Thank you. Great photo as well.

Cameron

 

[John C. Ratliff]

Here's another from the U.S. Navy Underwater Swimmers School, in 1967, of Harry Krause, an Air Force Pararescue Trainee surfacing after our deep dive to 120 or so feet. This was our last qualification dive, and you'll note that we are using the DA Aquamaster on the twin 90 aluminum Navy tanks. Since we were diving to 120 feet, they had a full charge this time. But my notes from the U.S. Navy School for Underwater Swimmers on these tanks are:

HP Cylinder and manifold maintenance nomencloture

1. Aluminum Cylinder
   1. 170 cu ft of air at 3000 psi
   2. Weighs 84 lbs when changed to 3000 psi (twin 90's)
      1. "O"-ring seal from manifold to bottle, with straight machine thread
      2. Working pressure--3000 psi
         Charged here to 2150 psi
         
      3. Test pressure 5000 psi
      4. No hydrostatic test date (test to 5000 psi every 3 years)
      5. Secured together by two aluminum bands, 11 inches apart (standard, can be adjusted)
      6. Rockwell hardness test stamped on bottle, rolled & cleaned & tested to 5000 psi (tested to month & year)
2. Steel cylinder
   1. 120 cu ft of air at 2150 psi
   2. Weighs 72 3/4 lbs at 2150 psi
   3. A 1/2" pipe thread from manifold to cylinder with no O-ring seal
   4. Working press 2150 psi
   5. Last 4 digits of stamp is ICC number
   6. 3585 psi test press.
   7. Secured together by 2 steel bands.
3. Safety precautions & proper methods of handling HP cylinders.
   1. Use HP Air in HP bottles, never oxygen
   2. Know your source of air
   3. Always leave 200-500 psi of air in cylinder to prevent condensation
   4. Never leave against the bulkhead; leave flat w/ straps up.
   5. Steel cylinders tested every 5 years to the month
   6. Never drop HP cylinders
4. Nomenclature of cylinder manifold
   1. J-1 manifold w/ 450 psi reserve
   2. J-2 manifold w/ 500 psi reserve
   3. J-3 manifold w/ 750 psi reserve
   4. K valve has no reserve
   5. Safety plug made out of lead with copper disc & washer, tested or babbet_______at 3900 lbs AL, 3200 steel; melts at 156 degrees F
5. On-OFF Valves
   1. Two bonnet nuts and a nipple
   2. O-ring seal from manifold to regulator
   3. Air reserve on left-hand bottle, slide lever control valve, allowing air to bleed to the left cylinder to right cylinder
   4. 2 1/2 to 3 inch dry pipe (1/4" wide) [I don't know what this one means--jcr]

So those are my notes from 1967. I think the J-1 manifold w/ 450 psi reserve is not correct--that should be 300 psi, but that was then, this is now. The safety plug of lead is no longer allowed too. But I thought you'd like to see those notes of mine.

SeaRat

 

[Bob DBF]

14 yes's and 7 pizzas sounds like a great pole...

Jim...

Pizzas are making a comeback at 12, with yes only going up to 15.


Bob

 

[oldschoolto]

Pizzas are making a comeback at 12, with yes only going up to 15.


Bob

It was working out great at 4 slices each.. Now we're going to have leftovers for the surface interval...

Jim..