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

Horizontal Check Valve - Ball Type Failure

check valve ball check valve check valve failure

3 replies to this topic
Share this topic:
| More

#1 FDR

FDR

    Brand New Member

  • Members
  • 1 posts

Posted 12 August 2022 - 01:29 PM

Hi everyone!

 

I'm process engineer in an oil refinery. A couple of months ago, we observed backflow in a caustic line due to the failure of a check valve.

 

The check valve was a ball type without spring (you can observe the diagram of this valve below)

 

I didn´t find any special requirements for check valves in caustic services (beside material or tracing requirements). So I suppose that ball types are suitable for caustic solution.

 

Is it possible have a failure (backflow) in an ball type check valve without spring as show in the table below?

 

Thanks!

 

 

 

 

Attached Files



#2 Bobby Strain

Bobby Strain

    Gold Member

  • Members
  • 3,277 posts

Posted 12 August 2022 - 03:22 PM

Seems like you provided the answer in your query.

 

Bobby



#3 breizh

breizh

    Gold Member

  • Admin
  • 5,572 posts

Posted 12 August 2022 - 10:15 PM

Hi,

I had similar issue with a water network  contaminated with caustic due to check valve failure . The objective was to dilute caustic with industrial water but because of the issue we changed  the process , adding a tank to prepare the mixture .

Difficult to rely on a check valve when there is a risk of contamination , sometimes people use 2 check valves .

 

Note : caustic soda is very viscous and tends to crystallize . It's not a good candidate for check valve.

Just my experience .

Breizh 



#4 fallah

fallah

    Gold Member

  • ChE Plus Subscriber
  • 4,847 posts

Posted 12 August 2022 - 11:33 PM

 

Is it possible have a failure (backflow) in an ball type check valve without spring as show in the table below?

 

 

Hi,

 

Yes, it's possible...the ball could be stuck at the top during normal flow then cannot prevent backflow in case of reverse flow...






Similar Topics