The three losses
- Oversizing — a pump selected for a duty the system never reaches
- Throttling — head artificially added at a control valve to match flow
- Drift — wear and system change moving operation away from best efficiency
What a performance assessment measures
- Flow using a clamp-on ultrasonic flow meter, without breaking the line
- Suction and discharge pressure to establish actual developed head
- Electrical input power at the motor terminals
- Computed pump and system efficiency against the manufacturer curve
Typical outcomes
Assessments commonly point to impeller trimming, correct re-sizing, variable speed operation where the load profile justifies it, or simply removing an unnecessary throttle. Each option should reach the client with an investment figure and a payback period attached.