By: Afromix  05-18-2015
Keywords: Impeller, Agitator

Mixing Technology represents a balance between the requirements of the process and the output efficiency of the impeller. Impellers used in agitation systems are required to produce three basic fluid regimes: Flow Shear Pressure Or a combination of these 3 Agitator impellers all obey the relationship P = Q x H (where Q = Flow and H = Head (Shear) Thus, all impellers are selected for their ability to produce various combinations of the variables of Power, Flow and Head (Shear). The main impellers used by AFROMIX in the selection and manufacture of their high technology agitators are: AFROMIX Type F3 impeller for high flow production Afromix impellerEquipment2 new logo This 3 bladed, high efficiency impeller is specifically designed to produce high flow velocity at low installed power. These low solidity impellers are usually selected for the following duties: Leaching , CIP, Neutralisation, Lime Make and Storage, Water Treatment, Chemical Reaction, Pulp Mixing, Flocculation, and similar applications where the generation of flow drives the agitator selection. AFROMIX Type P4 Pressure Impeller for Gas dispersion. Afromix ImpellerEquipment3 new logo These 4 bladed, high solidity impellers are specifically designed for applications involving the introduction of high volumes of gas. With a solidity ratio of greater than 90%, the gas introduced is unable to bypass the impeller. This results in an increase of power under gassed conditions (unlike 6 bladed Rushton impellers which reduce in power under gassed conditions), eliminating the need for variable speed or 2 speed motors to allow for the increased power when gas is reduced or shut down.These high efficiency axial gas dispersions are normally used on the following processes :- High pressure autoclaves BIO-Oxidation reactors Bacterial leaching Fermentation and Hydrogenation Iron Removal Cyanide Detox AFROMIX Type P 3 impeller for High viscosity applications P328 IMPELLERIn high viscosity applications, there is a need for an impeller to produce flow in viscous, low Reynolds number fluids. Normal low solidity impellers do not produce macro flow and high solidity impellers draw excess power. The compromise is the AFROMIX P3 impeller. This 3 bladed impeller has a solidity ratio of approximately 70%, allowing the production of macro flow in duties with a Reynolds number of 200-300, or effective maximum viscosity of 40 000cps. These impellers bridge the gap between low solidity aerofoils, and close clearance impellers like gates, spirals and anchors, which would have, traditionally, been used for applications in excess of 15000cps. The AFROMIX FS 4 impeller Afromix ImpellerEquipment1 new logo The AFROMIX FS4 impeller is used extensively for applications requiring high flow. however,despite its high efficiency,its limitations are its inability to produce sufficient shear for applications other than its designed purpose. PxQxH-Where Q = Flow and H=Head(shear) So, impellers producing high flow(Q), provide reduced Shear(S). For these applications,the tried and tested Pitched Blade impeller still has advantages,despite its relatively high power draw and low efficiency. This standard impeller,usually pitched at 45° or a convenient angle,is named the AFROMIX FS 4. Whilst rarely used it is still an important weapon in the mixing artillery. The AFROMIX R6 impeller pump mixer Afromix impellerEquipment0 new logoThe AFROMIX R6 radial flow impeller is a unique impeller designed for pump mixer applications such as solvent extraction or thickener dilution systems. The impeller is designed to advance flow, maximise dispersion and provide specified head generation. These curved blade pump turbines offer maximized head and flow while reducing power consumption, minimum shear generation and turbulence.

Keywords: Agitator, Impeller

Other products and services from Afromix



The 'Heart' Of The Pump A carefully designed and manufactured hose element is the single most vital component for the


Peristaltic Pumps

Simple in design – simple in operation Building upon the already well proven peristaltic pumping concept, AFROMIX has brought a



Pedestals and Mounting Bases Pedestals Mounting BasesWhere a processing plant is experiencing problems with gearbox cracking or other failure, the


Side Entry Mixers

This particular type of mixer is typically found in the petrochemical industry; crude oil and petroleum storage tanks, and some


In Line Mixers

Specially designed mixers to suit applications where traditional larger scale mixers cannot be utilised. This may be due to space


Pedestal Mounted Mixers

The design of large top entry agitators is often driven more by the requirement for the gearboxes to withstand high


Large Top Entry Mixers

As the processing demands of industry are increasing, the requirement for large Top entry agitators is becoming the norm, rather


Small Top Entry Fixed Mount and Portable Mixers

Afromix’s main market is the supply of large agitators for a variety of processing duties, in a wide range of


Top Entry Mixers

In applications where bending moment does not dominate the design of the agitators, gearboxes are selected to withstand the Torque,


Gas Dispersion

Gas dispersion applications include BIO-oxidation processes (Bacterial Leaching), Fermentation and Hydrogenation, Iron Removal and Cyanide Detox.


Autoclaves and High Pressure Units

The design of Autoclave agitators requires knowledge of the operating condition of the autoclave, the production rate, calculation of the extreme forces acting on the agitator and drive, the limits and tolerances of high pressure mechanical seals, the design of high pressure flanges and the requirements for materials of construction.


Fluid mixing applications

Fluid mixing applications are primarily divided into 3 main categories: Flow sensitive applications, Gas Dispersions and Chemical Reactions.