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

High pressure window sealing

High pressure window sealing

High pressure window sealing

Im looking at a deep sea underwater camera housing, with a conical acrylic window.
At first I thought I would go for place the O-ring grooves on the conical part of the contact face(A), as this would lead to a tight fit, and minimum extrusion risk.

I was worried about the contact pressure between the metal and acrylic, as I would expect a bit of plastic to creep inside the groove and hinder the window from moving "freely".
I therefor went for a standard radial design (B).

However, doing a simple analysis shows that the window will contract about over a millimeter in radial direction (80 MPa pressure)

Do you have any input or experience with a conical o-ring mount? Any other input?

Thanks alot!

RE: High pressure window sealing

I would just say the obvious, make sure you check the differential thermal expansion.

RE: High pressure window sealing

The force on the window due to pressure is the differential pressure times the area. You can't change the pressure differential but you can change the area. Is there any need to seal on the OD (or toward the OD) of the window? Why not put the seal on the conical surface like you wanted to initially, but put it down on the small end where the area is minimized?

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


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