×
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

Siphon break query

Siphon break query

Siphon break query

(OP)
Dear Sir


I got some trivial question about siphon break.
(Attached drawing).

Case 1. The line 1 ( no siphon break),
As delta P(B-A) < s.g.*h1, the liquid could flow down.
but as delta P(B-A) > s.g.*h1, the liquid will hold up and
not flow down, and gas in drum B may flush back to drum A.
Case 2. The line 2 (siphon beak).
As delta P(B-A) < s.g.*h1, the liquid could flow down.but as delta P(B-A) > s.g.*h2,
the liquid will hold up and
not flow down, and gas in drum B may flush back to drum A.

If s.g. * h1 < delta P (B-A) < s.g.*h2, the liquid won't flow down, and gas will not flush back.
Anyone can tell what is difference between case 1 and case 2 design.

Could any pro help me out?

Thank you very much.

RE: Siphon break query

A syphon break usually creates an air gap at the high point of the overflow connecting line. This air gap is to prevent liquid from flowing through discharge piping that runs above the source liquid level, which it can do in a liquid full piping system.

Neither of what you drew is what I would consider a syphon break and (because the piping is running liquid full), there is essentually no difference in the two configurations.

best wishes,
sshep

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