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

Isolation Valves Passing Problem


1 reply to this topic
Share this topic:
| More

#1 Jaguar_011

Jaguar_011

    Brand New Member

  • Members
  • 4 posts

Posted 13 April 2021 - 10:43 PM

Hello everyone, 

 

We have 03 No. pump-around (Naphtha/Kero/Gas oil) at our CDU distillation column, each provided with dedicated circulation pumps (for removal of PA heat) and single isolation valves (gate type) at pump suction. Whenever these pumps are switched for maintenance purposes, severe problem of suction valve passing is faced. Rust material has been observed at the valve seat which doesn't allow proper disc settling on the valve seat and hence the passing problem. Since, pump is operating at high temperatures with hydrocarbon service, there is obvious fire hazard if pump is taken out of services with the passing. 

 

What could be the possible solutions? 

 

1) How effective block & bleed valves will be in this case (Due to space constraints, this option is not very endorsing in our case)

2) Is there any special valve available for such services with proven experience? 

3) Can we provide flushing stream from downstream of pump to upstream of isolation valve for valve seat flushing?

 

Any response will be highly appreciated. Thanks


Edited by Jaguar_011, 13 April 2021 - 10:44 PM.


#2 breizh

breizh

    Gold Member

  • Forum Moderator
  • 4,954 posts

Posted 14 April 2021 - 01:07 AM

https://www.mogas.co...tion-guide-(en)

 

Hi ,

Consider the link above and drop them an email to explain your problem .

Good luck

Breizh






Similar Topics