×
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

Shut-off pressure of pump

Shut-off pressure of pump

Shut-off pressure of pump

(OP)
What is the disadvantage of running pump at shut-off head, zero flow rate?

RE: Shut-off pressure of pump

(OP)
I can't see any information from your link. Please help answer.

RE: Shut-off pressure of pump

last time this issue was discussed in thread 'pump cavitation' started by airbus a few days ago.

RE: Shut-off pressure of pump


The discussion in your own thread407-136129 is quite explicit. Anyway quoting Sulzer on minimum (>zero) flow rates of centrifugal pumps:

Quote:

Minimum flow rate of centrifugal pumps is determined by the following criteria:
-temperature rise due to internal energy loss.
-internal recirculation in the impeller (with large  
 impeller inlet diameter compared with outside diameter,
 the NPSH rises in the part-load range).
-increased vibration due to greater flow separation.
-increased pressure fluctuation at part load.
-increased axial thrust at low flow rates.
-increased radial thrust (especially with single-volute
 pumps).

Most of these conditions worsen at no flow.

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