×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

False Load on Centrifugal Compressor

False Load on Centrifugal Compressor

False Load on Centrifugal Compressor

(OP)
Can the False Load control valve activate the suction drum safety valve when the compressor is running ?? I have seen numerous analysis saying control valve failure directly activates the suction drum PSV - he required flow being control valve "blow thru" rate. It appears to me to be a double contingency. i.e control valve failure & blocked suction drum outlet. What am I missing ??

FOR EXAMPLE: suction pressure = 40 psig
           suction drum safety valve = 75-psig
           compressor discharge = 100-psig.
           false load control vave = fail open

RE: False Load on Centrifugal Compressor

what if the compressor discharge is connect to a surge drum 10 times bigger than the suction drum.  Of course you would have a check valve between the compressor and surge drum?

RE: False Load on Centrifugal Compressor

If the recycle valve (I assume this is the "false load" valve, right?) fails it should fail open, and this flow should be accounted for by the suction/inlet drum PSV.  It may not be the controlling case, depending on the size of the inlet drum and amount of expected liquid in the drum (fire case) or if the suction control valve fails (if you're controlling suction pressure on a PD compressor).

No, it's not automatic, but it should be taken into consideration.

With a centrifugal I would be more concerned about stonewalling the unit.

Onwards,

Matt

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources