Pump Performance Curve: Shutoff Head
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Shutoff Head
Shutoff Head
Flow Rate (Q)
Head (H)
Shutoff Head Characteristics
Definition
Maximum pressure generated when discharge valve is closed (zero flow condition)
Why It Occurs
- Impeller spinning without fluid movement
- Energy converted entirely to pressure
- No flow resistance
Effects on Pump
- ✅ High Pressure
- ❌ Low Efficiency
- ❌ Overheating Risk
- ❌ Component Damage Risk
Applications
- Maximum pressure verification
- System design limit testing