7 replies to this topic

[ashetty]

Does anyone have a simple diagram for Overhung & Between bearing pumps.The API seal plan 11/52 for the overhung type shows one stuffing box and one reservoir for overhung type and two stuffing boxes and reservoirs for overhung type, im having trouble visualizing it.

A.Shetty

[Art Montemayor]

Shetty:

To answer your question, a sketch is more descriptive and accurate than words. Please refer to the attached workbook. Also,

Go to http://www.gouldspumps.com/cpf_0001.html

This is the Goulds electronic version of what used to be their hardcopy "GPM" Manual Technical Section. I highly recommend it to all engineers as a refresher to centrifugal pump technology and know-how. Under the tag "Pumps", you will find explicit and illustrated examples of all the various types of centrifugal pumps and how they look in real life.

I am currently experiencing problems in uploading files to the Forum. I hope to get Chris Haslego's help in resolving the problem and if I can't upload the file now, I will as soon as the problem is resolved or defined.

Attached Files

•  Centrifugal_Pump_Types.xls   81KB   416 downloads

[ashetty]

Hello Art,

The excel sketch was good enough for me to understand the construction features of both types. The Goulds pumps manual is also a handy reference tool. Thanks for clearing my doubt.

Best Regards,

Ashirwad

[Art Montemayor]

Ashirwad:

I'm glad I succeeded in putting across the difference between both pump mechanical designs. I didn't devote much time to the sketches due to work load, and I apologize for that.

I sense a real interest on your part in determining what are the main positive/negative characteristics or tradeoffs between the two basic designs. And I would encourage you (& all other engineers) to always think along these lines when selecting, applying, and operating centrifugal pumps. There are major mechanical differences between models or types, and these differences can sometimes determine the relative success or failure of an application. Therefore, I consider it vitally important for all chemical engineers to become totally immersed in the mechanical design and features of centrifugal pumps because the wrong pump type in an application can cause operational and maintenance problems, expenses, inefficiencies, and much grief. Some chemical engineers involved only in the design phase of engineering pay little or no attention to these factors - and that is not only a shame, but in some cases it constitutes neglect and professional deficiency. Those of us who have been in operations and production disciplines know fully well how important it is to select and apply the correct pump type to a process.

We could spend a lot of useful, profitable time discussing the pros and cons of all the different models and pump types, but I will leave that subject to another thread and another time - for now.

I am glad you found the Goulds website profitable. There is a virtual gold mine of information there if you take the time to read it and follow it through.

[yousefmech]

thanks for the illustration, simple, yet very useful:P

[daniel1wk]

Have been googling for the definition of between-bearing centrifugal pump. The sketch just solved my prob. Thanks a lot!

Dnaiel

[Manik]

the skecthes were very useful. Its really hard to find the information in a simple form. Thanks for sharing the same.

[GTE]

Hello and happy new year (western calender)
I could not find the "GPM Technical section" on Gould Pumps website.
I am trying to refresh knowledge on different centrifugal pumps.
Many thanks for sending me the link or the document in electronic format
Go to http://www.gouldspum...m/cpf_0001.html

This is the Goulds electronic version of what used to be their hardcopy "GPM" Manual Technical Section. I highly recommend it to all engineers as a refresher to centrifugal pump technology and know-how