Core Working Principle
Axial Flow Pump: Flow moves parallel to the pump shaft (straight through). Works like a propeller - pushes liquid forward.
Mixed Flow Pump: Combines axial and centrifugal action: Flow enters axially, exits diagonally (between axial and radial).
1. Head & Flow Characteristics
| Axial Flow | Mixed Flow |
| * Very high flow rate * Low head * Typical head: 2–5 m * Used for large-volume, low-lift applications. |
* High flow (less than axial) * Medium head (higher than axial) * Typical head: 5–15 m * Balances flow and head. |
2. Specific Speed
Axial Flow: High specific speed
Mixed Flow: Medium–high specific speed
Axial flow is designed for maximum flow, mixed flow for balanced performance.
3. Efficiency & Best Efficiency Point (BEP)
Axial Flow:
Efficient at very low head, high flow;
Efficiency drops quickly if head increases.
Mixed Flow:
Wider efficient range;
More stable under varying head/flow conditions.
4. Typical Applications
| Axial Flow Pump | * Large drainage & irrigation * Flood control * Circulation in large basins * Power plant cooling water |
| Mixed Flow Pump | * Industrial circulating water * Water supply & distribution * Wastewater treatment (MBBR, aeration tanks, lift stations) * Medium-flow, medium-head drainage |
5. Impeller Shape
Axial Flow: Propeller-like, few blades, open design.
Mixed Flow: Blades are curved & inclined, mixed centrifugal-axial structure.
6. Installation & Operation
Axial Flow:
Often installed vertically;
Good for large sump/drainage.
Mixed Flow:
Can be vertical or horizontal;
More versatile for industrial systems.
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