In-line mixers were developed to accommodate the requirements of the chemical industries where continuous mixing was required, but there were spatial limitations. In-line mixers were designed to ensure that the continuous mixing was still achieved, as well as taking into account that the mixer more than likely was required to fit into existing pipe work on the site. Using in-line mixers where there are other limitations such as capital investment, and concerns for saving in areas such as operating and maintenance costs, became a most sought after solution, solving many concerns with one application.

There are two types of in-line mixers:

Conventional in-line mixers provide instantaneous mixing, blending or dispersing in a small volume and at a lower horsepower per total process. These types of in-line mixers require an additional power supply in addition to that of the flowing process stream. Using this type of mixer, the retention time is usually in seconds or low minutes, as opposed to in tank mixers, which have higher minutes to hours for retention and blend time to achieve the uniformed concentration throughout.

AFX specializes in the design and manufacture of static in-line mixers. This particular type of mixer is "motionless". This description provides an indication of the elements located within the pipe (conduit) part of the mixer, this, the mixing only occurs from the process stream while passing through the mixer. The in-line mixer is flanged and done so the mixer can be bolted into the existing process pipeline. Each mixer is sized to suit the application requirements, and many vary with some having as many as seven inlets for various probes and technical apparatus, other than the injectors which are used for the addition of particular chemicals or streams. In-Line mixers may also be found in the pulp and paper industry in very shear-sensitive applications.

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Our range of portable top entry mixers suited to smaller mixing and blending applications provides the customer with the freedom to decide how to mount, move or permanently fix the agitator. Portable air or direct drive units are supplied with swivel brackets perfect for mounting at the desired angle. Some small direct and gear drive units can be wall mounted for applications with multiple containers. Angular mounted or angular offset agitators are commonly employed for use in cylindrical mixing vessels which are un-baffled. The portability of our small agitators gives good flexibility, allowing freedom to move from one vessel to another. Our applications engineers are on hand to advise the most suitable configuration for your needs, to ensure these versatile agitators offer the user the most economic mixing solution.

The need for larger mixers has increased in recent years, mainly due to the industry's requirement to expand operations, or to keep production costs as low as possible. At AFX, we customize our top entry mixers to accommodate your process. Our top entry mixers are available in different technical specifications and can be used for specific purposes across different industries. In the past, large top entry units were more commonplace in the mining industry. However, this trend is now changing with other industries now also requesting larger and more specialized mixers.

Having specific applications and duties throughout various industries, side entry mixers are often used where the installation of top entry mixers may not be possible or feasible. This may be due to tank construction and load limitations, or even area limitations overhead. Although the design of the side entry agitator may sometimes call for larger power installations, the impeller to tank ratio to achieve the desired mixing/blending or suspension pattern is substantially smaller. The impeller power number will therefore not be the same for the top entry impeller, resulting in larger power draws with the side entry unit. This is taken into account when compiling the design for the side entry agitator, resulting in most of the larger side entering mixers being belt driven.


This unique radial flow impeller is designed for pumper mixer applications. The impeller is designed to discharge the fluid radially outward to the vessel wall. This particular type of radial impeller provides a more informal radial flow pattern when compared to the radial impellers which do not have a disc. The advanced design ensures advanced flow, maximum dispersion, and provides a specified and desired head generation. The curved blade pump turbines offer maximised head and flow while reducing air entrainment through low power consumption. Radial flow impellers are most commonly used in liquid-liquid dispersion applications.

The impeller used for the Turbine Mixer or Auxiliary Mixer is the AFX F3 Hydrofoil Impeller. These impellers are designed to deliver high pumping velocity at low power. The F3 is a versatile impeller, suitable for high mixing efficiency in high and low viscosities, increased scouring velocity and low shear rate, making it the ideal mixing impeller. The three-ear hub is keyed to the agitator shaft with the blades bolting onto it, together with the shaft in a single element. The adjustment allows for movement of the impeller after installation, to avoid phase separation. This impeller is manufactured from 316 stainless steel.