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How would you do it? Cascade System.....

Discussion in 'Compressors, Boosters and Blending Systems' started by Gdaaym8z, Apr 17, 2013.

  1. Gdaaym8z

    Gdaaym8z Dive Shop

    # of Dives:
    Location: Scottsdale, Arizona, United States
    241
    2
    18
    Okay, so I am wanting to maximize my fill station.....I currently have 9 "J" bottles 3500psi (Probably the wrong term for the bottles....please see photo below) that are plumbed into three storage banks (3,3,3) and I have a 4 whip fill station. I just recently purchased a Buaer K-20 compressor and I'm going to add 4 more fill whips for a total of 8.

    I am wondering how you would set up a system with the components I listed???

    One large cascade?

    I'm filling on average 60 AL80 bottles a week....

    I'm interested to hear your ideas.......

    Thanks.

    photo.JPG
     
  2. Akimbo

    Akimbo ScubaBoard Supporter ScubaBoard Supporter

    # of Dives:
    Location: Mendocino, California
    5,377
    3,161
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    Define optimize. Optimized labor? Optimized wear and tear on hands? Optimized fill time? Cascading from every bottle that is at a higher pressure than the tank you fill will minimize the number of times you run the compressor.
     
  3. KD8NPB

    KD8NPB Solo Diver

    # of Dives: 100 - 199
    Location: Hartford, MI
    778
    158
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    Why aren't you using copper pigtails?

    Also, have you considered adding some el-cheapo 2400 psi T-cylinders as a "low pressure" cascade? They're a dime a dozen, and take a lot of wear & tear off your compressor.
     
  4. Gdaaym8z

    Gdaaym8z Dive Shop

    # of Dives:
    Location: Scottsdale, Arizona, United States
    241
    2
    18
    I want to be able to get the most fills without running the compressor all the time.....

    So would I be better off with more individual bottles than the three banks of three that I have now? or one larger bank (say 3 bottles to fill majority of volume) then a three two bottle banks?

    Hopefully I'm not coming across like a complete idiot....I assure you I'm just your average idiot. LOL
     
  5. Superlyte27

    Superlyte27 Captain

    # of Dives:
    Location: Florida
    2,739
    1,493
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    Forget the 2400 lb bottles, that's just goofy talk. He's right about the wear and tear on the compressor, but phooey on taking up space with lower capacity bottles. :)

    I'm guessing most of your scuba tanks are going to be filled to 3200'ish psi. I'd make three banks of 3 bottles. So, when you start the week, you can hook up 8 bottles and open bank one. If I do the math, I'm guessing Bank 1 at 3600'ish PSI starting pressure will just about fill all 8 tanks. Unhook and hook up the next 8 tanks. Fill until you equalize Bank 1 then close Bank 1 and open Bank 2. Bank 2 will certainly fill all 8 tanks. Close all banks, hook up 8 more tanks. Open Bank 1, equalize. Open Bank 2, equalize. Open Bank 3, equalize. Wash, rinse, repeat. I could do the math, but I'm guessing you could probably fill 30-40 tanks without ever starting the compressor.
     
  6. KD8NPB

    KD8NPB Solo Diver

    # of Dives: 100 - 199
    Location: Hartford, MI
    778
    158
    0
    We have our cascade in a 20 ft shipping container. 12 x 3500, 24 x 2400. Guess how many times I run the compressor in a month? 12 cfm compressor too, so it doesn't take very long when I do...

    Not to mention that the owner is addicted to store buyouts and surplus auctions. We have a backup compressor next to our primary service compressor, plus a backup for the backup.
     
  7. Superlyte27

    Superlyte27 Captain

    # of Dives:
    Location: Florida
    2,739
    1,493
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    I'd prefer to just have 3 sub ballast bottles.
     
  8. superspeed

    superspeed Instructor, Scuba

    # of Dives: 200 - 499
    Location: Texas
    200
    23
    18
    The more you separate them the more fills you will get....but the more work opening and closing valves. I would do 3x3 and be happy, maybe add some more bottles and do 3 banks of 4 tanks. Million ways to do it really, but for what you have now, 3x3 would be the way I would do it.
     
  9. Farback

    Farback Regular of the Pub

    # of Dives: 200 - 499
    Location: Nova Scotia , Canada
    672
    1,317
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    From a fire department fill operator, I agree with this suggestion.
     
  10. Pedro Burrito

    Pedro Burrito Moderator Staff Member

    1,155
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    What are the hydro dates on all of those bottles? Can you actually see the stamps for all of the bottles? How are you going to get the one in the back out when it is due for hydro? Must you bleed the system every time one of the bottles needs to be pulled out? Oftentimes this isn't thought about until the bottle in the back has to be sent out for hydro.
     

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