Sizing of concentric collector for diffuser pump

[BasakAbhishek]

Hello,
Where can I find any thrumbrule for determine the sizing (specifically the cross section area) of a concentric collector in a pump with a diffuser?
Thanks!
Abhishek Basak

 

[BEMPE16524]

"Pump Handbook" by Karassik et al., the information provided aligns primarily with the following chapters and sections:

• Chapter 3: Centrifugal Pump Theory and Practice:
  • Covers fundamental hydraulic design, including diffuser and collector design principles. It discusses velocity recovery, flow transitions, and energy conservation in pump components.
• Chapter 8: Pump Hydraulics and Selection:
  • Focuses on practical considerations for sizing collectors, transitions, and optimizing flow paths to minimize losses and ensure smooth operation.
• Chapter 9: Design of Pump Components:
  • Contains specific guidance on diffuser and volute sizing, including relationships between velocity, area, and flow recovery. This section discusses collector dimensions and their impact on pressure recovery and efficiency.
• Appendices and Design Tables:
  • Provides velocity recommendations and standard thumb rules used in pump designs for various applications.

 

[BasakAbhishek]

Which edition are you refering to? I am having book by Karassik, Messina, Cooper and Heald, 3rd edn..by the same name,,it doesnot have these chapters

 

[Artisi]

What do you mean by concentric collector, are you referring to an inlet or outlet reducer piece?

 

[BasakAbhishek]

I meant the space after the diffuser and before the casing of the pump. This is marked by a red arrow in the attached file.