Jump to content



Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

Vertical Tank Selection

New Blog Entry

Low Flow in Pipes- posted in Ankur's blog

2

Pressure Control Of A Separator

pressure control separator pressure control valve opening control

4 replies to this topic
Share this topic:
| More

#1 james.corrobro@gmail.com

james.corrobro@gmail.com

    Veteran Member

  • Members
  • 35 posts

Posted 07 May 2021 - 07:33 PM

There is a separator with two control valves to maintain pressure of the equipment (separator).
 

The purpose is to maintain 250 psig at separator. For the pressure control valve-1, at what pressure should it start to open ? will it be at 250 psig or higher. What sizing cases should be made for PV-1? Should it be 250 psig at inlet? What will be controller output % at 250 psig pressure?
 

Also for pressure control valve-2 what pressure should it start to open? What sizing cases should be made for PV-2?

 

Attached File  pressure control.jpg   56.19KB   1 downloads



#2 breizh

breizh

    Gold Member

  • Admin
  • 5,118 posts

Posted 07 May 2021 - 10:47 PM

Hi ,

Common sense should prevail!

The controller will do the job , set point  is yours .

Good luck .

Breizh



#3 fallah

fallah

    Gold Member

  • ChE Plus Subscriber
  • 4,789 posts

Posted 08 May 2021 - 12:34 AM

There is a separator with two control valves to maintain pressure of the equipment (separator).
 

The purpose is to maintain 250 psig at separator. For the pressure control valve-1, at what pressure should it start to open ?250 psig will it be at 250 psig or higher. What sizing cases should be made for PV-1? Should it be 250 psig at inlet? Yes What will be controller output % at 250 psig pressure? Normally 50%
 

Also for pressure control valve-2 what pressure should it start to open?250 psig and the controller output goes beyond 50% What sizing cases should be made for PV-2?same flow rate as the valve-1 and pressure drop according to the flare pressure

 

attachicon.gif pressure control.jpg



#4 james.corrobro@gmail.com

james.corrobro@gmail.com

    Veteran Member

  • Members
  • 35 posts

Posted 08 May 2021 - 01:37 AM

fallah- thanks,
what is meant by controller output %
like what is meant by 50% of controller output?
when controller output goes beyond 50%...does it mean pressure is rising much high than 250 psi

 

There is a separator with two control valves to maintain pressure of the equipment (separator).
 

The purpose is to maintain 250 psig at separator. For the pressure control valve-1, at what pressure should it start to open ?250 psig will it be at 250 psig or higher. What sizing cases should be made for PV-1? Should it be 250 psig at inlet? Yes What will be controller output % at 250 psig pressure? Normally 50%
 

Also for pressure control valve-2 what pressure should it start to open?250 psig and the controller output goes beyond 50% What sizing cases should be made for PV-2?same flow rate as the valve-1 and pressure drop according to the flare pressure

 

attachicon.gif pressure control.jpg

 



#5 fallah

fallah

    Gold Member

  • ChE Plus Subscriber
  • 4,789 posts

Posted 08 May 2021 - 01:43 AM

 

what is meant by controller output % In split range control system the controller output splits into 0-50% and 50-100% to manipulate relevant actuator.
like what is meant by 50% of controller output?
when controller output goes beyond 50%...does it mean pressure is rising much high than 250 psi it means the pressure will tend to rise higher than 250 psig

 

 

 

 






Similar Topics