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.
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
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