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!

*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.

Jobs

Seal selection.

Seal selection.

(OP)
As per API 682 , In seal Types A,B,C. Type B flexible element normally rotates.and in Type C flexible element is normally stationary.

As I understand - if seal seal-face surface speed is below 23 m/s than flexible element rotates and if seal- face surface speed is more than 23 m/s than flexible element is stationary.

I have 2 question regarding this,
1) Is my understanding is OK? is this only criteria to choose seal type?
2) How can i calculate seal-face surface speed?

Thank you in advance.

RE: Seal selection.

Well, I should start by saying that the 23 m/s (~75 ft/s) is not TOTAL gospel with regards to seal design. Some seal designs have a lower surface speed threshold, while there are others (such as sundyne seals) that are far greater. I will say that we tend to be concerned in certain applications around 18-20 m/s. It just depends on a lot of different factors.

Calculating seal face surface speed is relatively simple. A good explanation is given in this article from Texas A&M's Turbo Lab. It's old, but the information is still relevant for the purposes of this conversation. http://turbolab.tamu.edu/proc/turboproc/T12/T129-1...

v = (η * π * D) / 60,000

For D, use the seal face diameter (or simply the published seal size for a quick and easy evaluation).
η is your shaft speed

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


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