Mixed Flow Pump

Efficient Fluid Handling Solutions

• Model AHW pump is a horizontal single stage single suction volute mixed flow pump and suitable for transporting pure water or the  other liquid with both physical and chemical natures  similar to those  of  water,  with the temperature of the  liquid to be transported not  over 50 
• Cut the impeller's outer diameter or replace it with an impeller of different performance
• Suitable for electric motor or diesel engine drives

Specification

• Capacities: up to 3400 m³/h
• Head: up to 22 m
• Discharge: up to 24 inch
• HP: up to 110 kw

Material

• Cast iron
• Ductile cast iron
• Bronze
• Stainless steel
• Super duplex stainless steel

Application

• Drinking water
• Sewage water
• Cooling water
• Sea water
• Irrigation
• Drainage
• Desalination

AHW Mixed Flow Pump

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FAQ About mixed flow pumps

What is a Mixed Flow Pump?

A mixed flow pump is a specialty pump that exhibits characteristics of both radial flow centrifugal pumps and axial flow pumps. As the name suggests, the impeller imparts velocity to the fluid both radially and axially. However, the dominant flow remains in the radial direction.

The impeller configuration in a mixed flow pump is different from that in centrifugal and axial pumps. Here, the impeller blades are oriented at an angle to the shaft. The angle varies from 30 degrees to 60 degrees in different designs. This angular orientation generates both radial and axial velocity components to the fluid. However, the radial component is higher which classifies these pumps under radial flow category.

Working Principle of Mixed Flow Pumps

The working principle of mixed flow pumps involves the rotating impeller imparting momentum on the fluid by accelerating it radially and axially. The fluid enters the suction nozzle of the pump and flows into the impeller eye. As the impeller rotates, the angled blades push the fluid outwards radially via centrifugal action.

At the same time, the angled blades also provide an axial thrust to the fluid generating flow parallel to the impeller shaft. So the fluid velocity gets a radial as well as axial component. However, the radial component dominates as these pumps are categorized under radial flow.

The velocity imparted converts the mechanical energy provided by the shaft rotation into fluid kinetic energy. As the fluid exits the impeller into the casing, the velocity head converts into pressure head as the fluid gets decelerated. The fluid exits the pump through the discharge nozzle at a higher pressure.

Key Components of a Mixed Flow Pump

The main components of a mixed flow pump include:

- Impeller: The rotating component with angled blades that imparts velocity to the fluid.

- Casing: The outer housing that encloses the impeller and guides the fluid.

- Suction Nozzle: The inlet of the pump that directs fluid into the impeller.

- Discharge Nozzle: The outlet of the pump from where high pressure fluid exits.

- Shaft: The rotating shaft connected to the drive that turns the impeller.

- Seals: Prevent leakage along the shaft.

- Bearings: Support the shaft and allow smooth rotation.

- Baseplate: A plate that provides support to the pump components.

Advantages of Mixed Flow Pumps

Some of the major advantages of mixed flow pumps include:

- Higher heads: Mixed flow pumps can generate reasonably higher heads compared to axial and radial pumps of same size. The combined radial and axial flow allows operating at higher heads.

- Higher discharge: For same head, the mixed flow pumps can provide higher discharge than radial pumps due to the axial flow component.

- Compact size: These pumps tend to be more compact compared to radial pumps for same head and discharge resulting in lower space requirements.

- Better solids handling: The axial flow component allows them to handle small solids better than radial pumps.

- Quieter operation: Due to lower velocities, these pumps operate more quietly compared to radial pumps.

- Better efficiency: The angular orientation of blades provides higher hydraulic efficiencies.

- Lower NPSH requirements: Mixed flow pumps require lower NPSH than centrifugal pumps making them more suitable for high suction lifts.