Design & Layout of Water, Wastewater and Residuals Pumping System
Example – Troubleshooting Problems with an Existing Facility
CASE STUDY #2
Common Problems in Pump Systems and Effective TroubleshootingProblem:
- Premature pump wear and damage to interior of pump casing
- Pump suction piping arrangement not in accordance with good practice and ANSI/HI 9.6.6
- Pumps: 7400 gpm each
Physical Modeling of Pump Intake
Solution:
- Keep suction piping header and pump in as installed configuration
- Eliminate eccentric reducer at pump suction nozzle
- Revise suction elbow to reducing elbow with a ratio of 1.6 in/out
- Add flow straightening grid
- Conduct physical modeling to confirm
Results:
- Modeling with subsequent field testing confirming model results
- Improved pump performance
- Increased pumping capacity approximately 1 mgd/pump
- Premature wear mitigated
Modified Suction Piping