×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

O-ring groove too deep - options

O-ring groove too deep - options

O-ring groove too deep - options

(OP)
We may have a situation where an o-ring groove is so deep the o-ring will not be squeezed at all at installation.0.25" Ø section. Low pressure oil seal.

I think I've seen instances where a second, very small section o-ring was installed first to provide a seal.
I was surprised when I found nothing in all my o-ring information.

Does anyone know of an "official" fix?

RE: O-ring groove too deep - options

Have you looked at going with a fatter o-ring?
You may have to open the with of your o-ring groove.

RE: O-ring groove too deep - options

I would not trust 2 o-rings, seems entirely hit or miss. Sounds like a one off problem so a custom shape seal is probably out of the picture. I would go with either reworking the part if possible or a bigger o-ring cross section which may require cutting a wider groove as monkeydog noted.

----------------------------------------

The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

RE: O-ring groove too deep - options

Can you get a weird profile (X section) O-ring of a larger size into the existing groove? Far from official but it might work.

Or maybe try to cut a thin garlock or similar gasket to drop into the groove and take up some space? Like a backing ring?

RE: O-ring groove too deep - options

You may contact Parker O-Rings. I can't think of the name of the seal to save my life right now, but a few years back we used them in tools that had worn O-ring grooves and they solved our issues on tools pressure up to 30ksi. Worst case you can do like our technicians did and wrap the grove about 30 times with plumbers tape....

RE: O-ring groove too deep - options

(OP)
The part was assembled and pressure tested OK.
The assembly specialist said the o-ring looked barely flush in the groove, and the cover assembled "too easy", kind of confirming the measurement was correct.

Thanks for the suggestions.

RE: O-ring groove too deep - options

You may find that on a cold day that o-ring does not seal at all. Try putting your assembly in a freezer and then test it again.

RE: O-ring groove too deep - options

So, after the suggestions provided on this site, what approach did you use?

RE: O-ring groove too deep - options

(OP)
For various reasons the component was used with the 0-ring groove depth neither confirmed, nor corrected.
The part was assembled and pressure tested fine.
The assembly specialist said the o-ring looked barely flush in the groove, and the cover assembled "too easy", in my mind confirming the "too shallow" measurement was likely correct.

That particular O-ring is not likely to get very cold, very often.
https://c2.staticflickr.com/4/3697/9271989530_b002...

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close