Results 1 to 5 of 5

Thread: What is this Tank?

  1. #1
    Grouper
    Join Date
    04/05/2009
    Location
    United States
    Age
    41
    Posts
    274
    Images
    1

    What is this Tank?

    Hi, I got a couple steel tanks recently, and don't know what exactly I have. Stickers on the side say Aqua Lung and HP 3.5. They seem to be a little heavier, a couple inches shorter and a little narrower than my AL 80's.

    Here's the info from the side of one of them:

    DOT E9791-3500 TP5250 4-98
    14636547
    81

    This would make them HP 3500's made in 98. What I want to know, however, is what "size" they are in cubic feet. Can anyone help?

    Ted

  2. #2
    Megalodon
    Join Date
    11/12/2007
    Location
    Wichita, KS
    Age
    58
    Posts
    14,155
    Images
    13
    The actual tank dimensions would give a good starting point.

    http://www.huronscuba.com/equipment/scubaCylinderSpecification.html is a good reference to help too. I’m kinda guessing it’s a PST given they’re the only listed 3500 psi tanks.

    I ruled out the European tanks as they’re rated in BAR and yours is a DOT stamped tank.

    Since you said that it’s a couple inches shorter than an AL80 (26.06”), my top choice would be: PST HP100 (23.94”) Given it’s about 2” shorter.



    I once saved a man in Wichita just to watch him dive...(inventor)

  3. #3
    Shark
    Join Date
    03/05/2008
    Location
    United States
    Posts
    2,004
    Is PST still in business? Their website looks weird.

    pstscuba.com
    "Time's fun when you're having flies." -Kermit the Frog

  4. #4
    Grouper
    Join Date
    04/05/2009
    Location
    United States
    Age
    41
    Posts
    274
    Images
    1
    Nice chart, I was looking for something like that. Yes, the measurements match the PST 100. Thanks so much for your help!

  5. #5
    Megalodon
    Join Date
    11/12/2007
    Location
    Wichita, KS
    Age
    58
    Posts
    14,155
    Images
    13
    Quote Originally Posted by Largo View Post
    Is PST still in business? Their website looks weird.

    pstscuba.com


    Pressed Steel Tanks is still in business, but I recall that a number of years ago they quit making dive tanks, concentrating on more industrial tanks. For some reason, I’m thinking that Worthington bought out their dive tank production. I could be wrong, but that’s what I recall.

    Paperdesk: PST are good tanks with a few drawbacks, mainly the 3500psi working pressure. It’s hard to get a full fill as even today, most shops will have trouble getting 3500 psi in the fill station or even if they do a slow fill there will be a lot of heat generation during the fill, especially if the tank was nearly empty.

    Another issue to be aware of, especially if it’s the same alloy as the Worthington’s is with getting a new hydro. The tank is a great tank, but doesn’t like the hydro process, especially the drying portion. If the tank isn’t dried with hot air blowing, is gets a lot of flash rust that will need a tumble to clean it up. One shop likened to giving a cat a bath: When it’s all done you got a nice clean critter but you definitely paid for the process.

    All that said, they are great tanks, especially is your diving a dry suit. Have some great dives!

    I once saved a man in Wichita just to watch him dive...(inventor)

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 11
    Last Post: 12-13-2010, 18:45
  2. Tank to Tank Equalizer Din
    By ScubaToys Larry in forum New Product RSS
    Replies: 2
    Last Post: 05-15-2010, 17:48
  3. Tank to Tank Equalizer Din With Gauge
    By ScubaToys Larry in forum New Product RSS
    Replies: 0
    Last Post: 05-14-2010, 18:10
  4. Replies: 76
    Last Post: 08-20-2009, 17:36
  5. why does one tank make my mouth so dry, but a different tank doesn't?
    By Ladyvalea in forum General Scuba Training Questions
    Replies: 7
    Last Post: 10-28-2008, 22:05

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •