Design & Layout of Water, Wastewater and Residuals Pumping System
Example – Troubleshooting Problems with an Existing Facility
CASE STUDY #1
Problem:
- Premature pump wear and of interior of pump casing
- Pump suction piping arrangement not in accordance with good practice or in accordance with ANSI/HI 9.6.6
Existing Suction Piping – Eccentric Reducer at Pump Suction Nozzle
Solution:
- Move eccentric reducer from pump suction nozzle to upstream location at least as much as HI 9.6.6 recommends
- Conduct physical modeling to confirm
- Model recommended addition of flow straightening grid due to unstable flow patterns in suction piping due to multiple bends and plug valve with rectangular reduced area port opening
