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

How To Estimate Hydrodynamic Seal Leaks?

How To Estimate Hydrodynamic Seal Leaks?

How To Estimate Hydrodynamic Seal Leaks?

I am trying to estimate the amount of HC's that leaks out of a hydrodynamic seal on a large gas compressor.  The seal has two sealing faces and two buffer gas purges, JC Type 28AT.  It is assumed that both the primary and secondary faces failed and opened completely.  How should the environmental release be estimated?

RE: How To Estimate Hydrodynamic Seal Leaks?

Just as you would think.
If the seals have failed, then you must discount them. You need to look at the three entry areas and pressures, and the combined exit area and pressure. It is most likely that the purge supplies cannot keep up with the leakage flows and can possibly be ignored.
A series of choked flow orificies is probably a good way to start this exercise.


Steve McKenzie

RE: How To Estimate Hydrodynamic Seal Leaks?


If both faces opened completely, then each seal acts like a bushing.  So with this 28AT, 2 bushings for the faces plus a secondary containment or segmented bushing for the second buffer gas purge (1 purge between the two sets of seals).  

If you still have the seal parts you may want to call in your seal rep to perform a failure analysis.  

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


Research Report - How Engineers are Using Remote Access
Remote access enables engineers to work from anywhere provided they have an internet connection. We surveyed our audience of engineers, designers and product managers to learn how they use remote access within their organizations. We wanted to know which industries have adopted remote access, which software they are using, and what features matter most. Download Now
eBook - Managing the Context of Product Complexity Using the Digital Twin
Keeping track of changes to complex products is difficult—think Aerospace & Defense equipment, new generations of commercial aircraft, and software-based automobiles. A new way to managing the digital context of the physical product is required and the answer is the Digital Twin. This ebook explores the opportunity available for Operations and Maintenance for the Digital Twin. Download Now
White Paper - Trends in Industrial Filtration
Substantial progress has been made in filtration technologies in recent years. New filter media materials, designs and processes have led to filters that are more efficient, reliable, compact and longer lasting. This white paper will discuss the various trends that are impacting operational responsibilities of MROs today and the resources that are available for staying up-to-date on the latest filtration solutions. Download Now

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