2 replies to this topic

[Abdessamed1961]

Hello everyone!

I'm currently working on a project in which i want to reduce the pressure of a gas that has the followng properties ( T= 80 - 120 °C ; P1 = 350 - 260 bar.a; the flow varies between 1 to 10 Millions Sm3/day), i want to reduce it to achieve P2= 240 bar.a (as shown in the scheme attached).

My question is :

1- Can i control the pressure and the flow at the same time for example, i want to transfer 1 Millions Sm3/day and setting the pressure at 240 bar and then switch to another flow 5 Millions Sm3/day and keeping the same set pressure at 240 bar.a.

2- Installing  FCV + PCV close to each other is it feasible, they won't affect each other?

 

Thanks in advance for your help.

Attached Files

•  Scheme control valves.jpg   49.28KB   1 downloads

Edited by Abdessamed1961, Today, 04:30 AM.

[Pilesar]

I do not understand the diagram with the arrow from the PCV pointing to the FCV, but I don't see a problem with the proposed scheme of FCV upstream of PCV. You should have other similar pipeline control systems to use as a go-by. The choice of valves will make a difference. I have usually left the specific valve details to the instrument engineer since they rarely make the choice I would have made yet they keep their jobs so must know what they are doing.

[Abdessamed1961]

I do not understand the diagram with the arrow from the PCV pointing to the FCV, but I don't see a problem with the proposed scheme of FCV upstream of PCV. You should have other similar pipeline control systems to use as a go-by. The choice of valves will make a difference. I have usually left the specific valve details to the instrument engineer since they rarely make the choice I would have made yet they keep their jobs so must know what they are doing.

thanks for your answer, the objective of making those arrows is to set a cascade or override control, i was trying to put the PCV as Inactive as long as the downstream pressure doesn't exceed 240 bar.a.