×
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.

Students Click Here

Kw backpressure correction factor for liquid PSVs

Kw backpressure correction factor for liquid PSVs

Kw backpressure correction factor for liquid PSVs

(OP)
Regarding the backpressure correction factor for balanced bellows PSVs in liquid service, Kw:

Has anyone seen values for Kw for backpressure/setpressure ratios greater than 80%?

I have a situation where I have a ratio greater than 80%, but I have never seen Kw values published for this range.
Replies continue below

Recommended for you

RE: Kw backpressure correction factor for liquid PSVs

I have not and you shouldn't either. Your tail pipe (and downstream header, if applicable) is way too small. If this is a new design, increase your pipe size. You may want to re-evaluate your credible scenarios. You may also want to check if you bought (or are going to buy) too big of a relief valve or are buying the wrong type of valve. Bigger valves mean larger rated (capacity) flows.

If this is a check for an existing system, again, re-evaluate your scenarios. Check to see if your relief valve is the correct size (too large?) or type. You may have to improve your piping.

Check with the vendor you are interested in. They may be able to advise further.

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