• Welcome to ScubaBoard


  1. Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

    Benefits of registering include

    • Ability to post and comment on topics and discussions.
    • A Free photo gallery to share your dive photos with the world.
    • You can make this box go away

    Joining is quick and easy. Login or Register now by clicking on the button

Poseidon O-Ring Types and Size info

Discussion in 'Poseidon' started by Caveeagle, Jun 5, 2016.

  1. Caveeagle

    Caveeagle Rebreather Pilot

    # of Dives: 500 - 999
    Location: High Springs, FL
    1,464
    949
    113
    Looking for some info on Poseidon O-Ring types and sizes. I have a couple 2940 1st stages I want to clean and service and want to use O2 compatible Viton (or better) O-rings. It looks like most of the O-rings from the 3872(Viton) kit will work, but the HPseat and the diaphragm are different, So I need to either just combine two kits, or order the Individual Viton parts to upgrade the 3886 kit.

    My other option is to figure out the O-ring sizes and types and just stock up on the bulk bags.
    a)Can anyone confirm if the Viton(Green) O-Rings supplied by Poseidon are 70, 75 or 90 hardness? Or some of each? I assumed the HP parts should be 90, but some seem softer and I am guessing 70/75.
    b) I have the metric sizes for some of the parts, but they seem to be odd sizes. Are the standard sizes? anyone have a list or conversion chart? (and willing to share?)
    c)Best source for stock Metric O-rings? I have been using the O-Ring store, but they don't seem to have a lot of metric sizes in 90 hardness.

    [​IMG]
     
  2. Caveeagle

    Caveeagle Rebreather Pilot

    # of Dives: 500 - 999
    Location: High Springs, FL
    1,464
    949
    113
    Bump.... no love for Poseidon this week?
     
  3. tbone1004

    tbone1004 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    15,693
    7,022
    113
    are you using them for O2 service?

    I think the best way to tackle this one is going to be with the micrometers and spec them out. Do a rough "feel" comparison against known 70/90 duro o-rings and bulk order them
     
  4. Caveeagle

    Caveeagle Rebreather Pilot

    # of Dives: 500 - 999
    Location: High Springs, FL
    1,464
    949
    113
    I am planning to take an advance Nitrox class and/or Deco class at some point this year. I have not decided which route to go, so I want to be able to use a couple 2940 1st stages I have for ~50% and possible 100% at some point.

    I know I can just pull Viton parts from the 3872 kits I have, but I was not sure if the black rubber (1189) Diaphragm was safe for 02 use. I am pretty sure others have used these 1st stages for deco, but I like to double check stuff like this.

    I do like the idea of getting the actual sizes and ordering in bulk. I am slowly working on this too. It seems that I have ended up with a lot of odd-ball spare stuff, including HP seats and Cup filters, so it would really figure out the other O-rings needed.
     
  5. tbone1004

    tbone1004 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    15,693
    7,022
    113
    I'd love to have some of those that I could O2 clean, but alas, I've settled on cheap pistons from Piranha. Work well, cheap to buy, cheap to maintain
     
  6. tbone1004

    tbone1004 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    15,693
    7,022
    113
    Compiling this information right now, will have it published on this thread once it's done, but I have all of the o-ring sizes!
     
  7. davetowz

    davetowz Dive Shop

    # of Dives: 2,500 - 4,999
    Location: usa, Ohio
    648
    93
    28
    A plus marine sells oring kits for the poseidons. Seats and diaphragms.. got me. I don't know of a good source other than Poseidon.
     
  8. Poiret

    Poiret Garibaldi

    # of Dives: 200 - 499
    Location:
    2
    0
    1
    Did you ever get all this information together? It would be good to see :)
     
  9. tbone1004

    tbone1004 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    15,693
    7,022
    113
     

    Attached Files:

    AFdivedoc likes this.
  10. Poiret

    Poiret Garibaldi

    # of Dives: 200 - 499
    Location:
    2
    0
    1
    Cheers. Much appreciated
     

Share This Page