3 replies to this topic

[ramlalithravi]

I need any recommended practise for fixing level setting of 3 phase as well as the 2 phase separator to diffrent level such as HH, H NL L, LL.

generally it is based on the percentage of mean value (low range value and high range value).if any standards is there to follow for more precise value?


Regards,
Ramesh

[Zauberberg]

Look into the attached paper, extracted from a design standard available online. You can use these figures as guidelines for setting LAHH, LAH, NLL, LAL, and the LALL values.

Normally the difference between NLL/LAL, and NLL/LAH, is the hold-up time required for control. The difference between LAH/LAHH and LAL/LALL is the hold-up time required for operator intervention before the system reaches trip conditions.

Attached Files

•  Pages from e-pr-880.pdf   53.44KB   268 downloads

Edited by Zauberberg, 01 July 2010 - 09:24 AM.

[ankur2061]

Ramesh,

Additionally you can have a look at the following link for separtor design, holdup times & low-low/low/high/high-high settings.

http://www.red-bag.c...r-vessel-sizing

Hope this helps.

Regards,
Ankur.

[ramlalithravi]

Thanks for the valuable informaion from both of you!!!

definitely this would give insights about the separator design and control functioning pertains to separate throughly..


Regards,
Ramesh