What Causes Ragging in Sewage Pumps?

[Mohiden]

Hello,

I would like to know what causes a RAGGING in sewage pump?

Here are some causes that I can think of but I need more.

Poor maintenance
Broken seal
Exessive usage
impeller wear-cavitation


Many thanks

 

[Q_Goest]

Hi Mohiden. Pump ragging is the buildup of solids on the impeller, causing the pump to loose efficiency or to become blocked. Ragging refers to rags or other fibrous materials that people might flush down a toilet.
See for instance:
Eng-Tips
Google