Results 1 to 8 of 8
  1. #1
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,328
    +1
    29

    How do you properly measure O rings?

    I need 3 different sized (Viton) O rings for the PSI cooker heads. How do I accurately measure them so I get the correct replacements?
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	ebay.jpg 
Views:	5114 
Size:	1.38 MB 
ID:	26000  


  2. #2
    Connecticut CrazyA's Avatar
    Join Date
    Nov 2005
    Location
    CT.
    Posts
    8,134
    +1
    1,050
    http://www.satoriseal.com/Technical/...to_o-rings.htm

    edit: I don't know if this really helps you!!!!


    .

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,328
    +1
    29
    That helped greatly CrazyA, thanks. Now what material should I use for the inner head gasket? I chose EPDM for the outer head and O rings for the head bolts. +212 F heat range with excellent water resistance. I was thinking Viton for the inner b/c of the +400 F heat range and oil resistance, but it is poorly rated for water. Any suggestions on material to use?

  4. #4
    Banned User
    Join Date
    Aug 2006
    Posts
    1,236
    Hope this helps some:
    When working as a pump builder for water and waste water, I would do this: Take your dial calipers and stretch the I.D. of the o-ring, multiply by 2, then divide by Pi (3.1416). That'll give you the I.D.

    For O.D. Measure the thickness of the ring, multiply by 2, and add to the inner diameter.

    So:
    I.D.= L x 2 / 3.1416
    O.D= Th x 2 + I.D

    Oh, and I stayed at a Holiday Inn express last nite.

  5. #5
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,328
    +1
    29
    Quote Originally Posted by wetherby View Post
    Hope this helps some:
    When working as a pump builder for water and waste water, I would do this: Take your dial calipers and stretch the I.D. of the o-ring, multiply by 2, then divide by Pi (3.1416). That'll give you the I.D.

    For O.D. Measure the thickness of the ring, multiply by 2, and add to the inner diameter.

    So:
    I.D.= L x 2 / 3.1416
    O.D= Th x 2 + I.D

    Oh, and I stayed at a Holiday Inn express last nite.
    ???????????????????????? Are you for real? I finally figured out I could just measure the innermost part of the O ring grooves on the cylinders. And caliper the thickness of the O ring. That coupled with McMaster Carr's tremendous inventory, I came up with the right stuff. Talking to a former PSI guy, I found they did use Viton for the inner ring. Thanks for the help guys. There will be a new thread in the projects section before long.

  6. #6
    Banned User
    Join Date
    Aug 2006
    Posts
    1,236
    Quote Originally Posted by xlint89 View Post
    ???????????????????????? Are you for real?
    Was it too complicated?
    Unless you have a solvent streched o-ring, this simple math works every time. It's never failed me.

    If one wasn't available, I kept a kit on the truck to make my own from straight stock.

  7. #7
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,328
    +1
    29
    Sure was. I haven't had to do that much math in a long time. I wasn't sure how far I should stretch the ring either.

  8. #8
    Banned User
    Join Date
    Aug 2006
    Posts
    1,236
    Oh, Sorry buddy.

    This is almost everyday math to me.
    Kinda makes me feel like a geek now.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. How do you get wear ring out of plactic pump
    By 111toybox in forum 4-Tec Performance
    Replies: 5
    Last Post: 08-06-2012, 07:14 PM
  2. how do you measure the steering nozzle for neutral from the pump?
    By jetdave56 in forum Yamaha PWC Performance (2-stroke)
    Replies: 10
    Last Post: 10-31-2011, 09:24 PM
  3. how do you compress rings?
    By xplayer2885 in forum Polaris Open Discussion
    Replies: 8
    Last Post: 08-24-2007, 02:04 PM
  4. How do you replace/ Flip wear ring
    By TroyRXP15 in forum 4-Tec Performance
    Replies: 32
    Last Post: 05-25-2007, 12:21 PM
  5. How do you get stainless wear ring out?
    By Pale Rider in forum 4-Tec Performance
    Replies: 9
    Last Post: 04-29-2007, 03:08 PM

Posting Permissions

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