4 replies to this topic

[abinai]

Dear all,
A 3-phase separator is operating at a maximum pressure of 800KPa and minimum pressure of 400 KPa .The gas from the
separator is further treated in a scrubber operating at 300KPa.A pressure control valve is placed in this gas line. This is the process condition.

Now my doubt is how the pressure control valve operates and controls the pressure at both maximum and minimum condition(ie at 800 & 400 KPa)?
Thanks in advance,
With regards
abinai

[fallah]

Please send a simple sketch to give better assistance.

With the above limited information, it seems that the PCV would control its downstream pressure (scrubber inlet) against a pressure fluctuation (800-400 kpa) in the upstream.

[abinai]

Dear fallah,

You are correct. The PCV control the downstream pressure to scrubber. But my doubt is how it control the pressure fluctuation between 400-800 KPa.

Thanks in advance,
With regaards,
Abinai

[kasri]

Dear Abinai,
If my understanding is correct, there will be two different volumetric flows according to your different pressure scenarios.Based on that, flow co-efficient will be calculated and during valve selection it will be considered for both cases.According to that conditions percentage valve openings will be set.
Hope it will clear your basic doubts. If you give further details on that ,it will be easier to answer your exact requirements.Feel free to upload a sketch which will easy to understand for us.
Regards,
Kasri

[abinai]

Dear Kasri,
Thank you for your valuable response.
Regards,
Abinai