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


Liquid Critical Pressure Ratio Factor Ff

No replies to this topic
Share this topic:
| More

#1 Bodhisatya


    Gold Member

  • Members
  • 154 posts

Posted 27 February 2019 - 10:32 AM

Hello All
The textbook definition of Liquid Critical Factor used in sizing control valve is 
"The coefficient FF is the ratio between the apparent pressure in vena contracta in choked condition and the vapour pressure of the liquid at inlet temperature"
The equation used to find the factor is :
FF = 0.96 - 0.28*(sqrt(Pv/Pc)) {where pc is the critical thermodynamic pressure.}
Esteemed Members, requesting insight on how this final equation has been derived.

Similar Topics