×
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

Centrifugal Pump Testing

Centrifugal Pump Testing

Centrifugal Pump Testing

(OP)

Next week I will be participating the tests of a centrifugal pump, which my company has ordered, at pump manufacturer's site. What would you expect at this type of test?

RE: Centrifugal Pump Testing

A pump test whitness opportunity is a great time to check for a lot of things.  Obviously, recording actual head-flow relationships is the most important so that a real pump curve can be developed. Other things are important too, like if you plan to VFD the pump, checking for vibration along the shaft speeds anticipated is important.  Also, leaks can be identified and and punch list items can be compiled for repair before the pump is shipped.  As for the driver, you want to have full access to what is going on with the power and its relationship to head-flow, motor operating temp, current draw, power factor, vibration. etc.  In essence, you want to take all the measurements necessary to recreat the manufacturers pump curve for that model of pump so that it is specific to your pump.  Last but not least, you want to physically mark the pump so that when it arrives on site, it can be determined that that is the pump that you tested.  This may seem like overkill, but believe me, I have seen stranger things happen when you go home and wait for the pump to arrive.

I hope this helped.....

RE: Centrifugal Pump Testing

If you are the cognizant (responsible)engineer for this pump or series of pumps of the same design, you should have obtained from the manufacturer a test specification detailing exactly what tests will be run to determine full-range normal pump performance head-flow, motor pumpdriver input power , running current and power factor, bearing temperatures and , if specified by your company, shaft radial and axial loads to verify bearing integrity. If abnormal operations like reverse rotation, reverse flow are expected and pre-specified, then these should be addressed in a full engineering test of the design. Test loop layout (especially inlet piping run),instrumentation types, ranges and locations to measure pump and driver performace should have been approved by your company prior to the test so there will be assurance of correct measurements in accordance with any pre-specified codes or standards.
   If you are not responsible for the outcome of the test and are merely an invited bystander, don't worry about a thing. Just sit back and enjoy the action or chaos as the case may be.             vanstoja

RE: Centrifugal Pump Testing

DOn't forget to request up-to-date instrument calibration certificates...HI specifies calibration intervals of various test instruments.

RE: Centrifugal Pump Testing

John/vanstoja is correct that a written test plan is ideal and should be agreed upon well in advance.

Also I would recommend checking vibration at various flows.

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! Already a Member? Login


Resources

White Paper - A Guide to 3D Printing Materials
When it comes to using an FDM 3D printer effectively and efficiently, choosing the right material at the right time is essential. This 3D Printing Materials Guide will help give you and your team a basic understanding of some FDM 3D printing polymers and composites, their strengths and weaknesses, and when to use them. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close