×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Metal-to-Metal Radial Seal I nee

Metal-to-Metal Radial Seal I nee

Metal-to-Metal Radial Seal I nee

(OP)
Metal-to-Metal Radial Seal

I need a metal-to-metal, static, 10000-psi, radial seal. I have control over the OD dimensions but the 7” ID may vary +/- 1% on diameter, may be out of round +/- 1%, and may be slightly off centre.  Has anyone ever seen anything that might work in an application like this?

RE: Metal-to-Metal Radial Seal I nee

I am not sure of your full application but the link below is for a company which has supplied dedicated seals to high pressure applications

http://www.vectorint.co.uk/

RE: Metal-to-Metal Radial Seal I nee

I have designed radial seals up to 60,00 PSI.  We could go higher but have never had the need.

We use a close toleranced metal ring with o-rings.  The o-rings seal up to 1500 PSI.  You must design the ring so that it will expand and fill the gap, creating a metal seal, before you reach the limits of the o-ring.

The equations for the ring are easy to develop and can also be found in any Strength of Materials Text.

RE: Metal-to-Metal Radial Seal I nee

(OP)
JamesBarlow,

The close tolerance of the seal you're describing won't work for me in this case but the o-ring assist sounds promising. Maybe something along the line of a pressure energized U-cup using an o-ring for the initial seal.

Much appreciated.

RE: Metal-to-Metal Radial Seal I nee

U cups can take a lot of punishment, but you're talking about a +/- 1% on 7 inches!!! I don't know of any available piston cup or u-cup that can stand against a potential 140/1000 gap under 10,000 psi. Yikes! Good luck. You really do need a custom seal, or tighten tolerances.

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!


Resources