Operating principle of an industrial mixer

From a process engineering standpoint, an industrial mixer is a system that transfers mechanical energy to the fluid to establish the required flow regime—axial, radial or mixed—to disperse, emulsify or homogenise liquid components and/or fine solids.

The outcome depends on three variables:

  • Impeller/head geometry

  • Rotational regime (rpm and torque)

  • Operating conditions (viscosity, temperature, vacuum/pressure)

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At InoxMIM we apply these principles in hygienic equipment built in AISI 316L, with single or double mechanical seals (double seals can be thermosiphon-cooled where needed) and full CIP/SIP compatibility for in-place cleaning.

What happens inside the tank or the line during mixing?

The motor converts electrical power into torque, which is transmitted through the shaft to the impeller or rotor–stator head. This generates tip speed and a defined shear field in the fluid. The specific energy input (kJ/kg) applied at this stage governs drop/aggregate break-up and the time to homogenise.

A turbine or rotor–stator induces axial/radial circulation that sweeps the useful volume and eliminates dead zones. The shear gradient breaks agglomerates and reduces droplet size, while bulk circulation renews the boundary layer on walls and coils, improving heat transfer. With the right rpm and impeller type you can control air entrainment and stabilise apparent viscosity in non-Newtonian blends.

A head installed at the base of the reactor creates the shear zone where deposits typically form. Flow rises along the tank axis and returns down the periphery, cleaning the bottom, reducing sediment build-up and improving drainability. This architecture shortens cycle times on viscous batches and enhances thermal uniformity by eliminating hot/cold spots.

The machine operates as a pump plus emulsifier: it draws in product, processes it through the multi-tooth head, and discharges it. This enables reactor recirculation (a recirculation loop) or continuous production, delivering consistent quality batch after batch. The renewal rate (flow/volume) and the number of passes determine the final particle size and stability.

Droplet/particle size is governed by the combination of rpm (tip speed), head geometry and residence time. Rotor–stator systems (EMV/EM/EMF/EML/EMLT) apply high shear and routinely achieve sub-10 μm results; MICRO can push sizes even lower where the formulation allows. Architecture and speed dictate air entrainment: correctly sized TURBINE and EMF minimise it; in-line operation virtually eliminates it.

Effective mixing renews the boundary layer and improves the overall heat-transfer coefficient, reducing heating/cooling times. Energy draw is optimised by adjusting rpm, impeller diameter and the target viscosity; excessive speed may increase air entrainment without improving particle size if the head is not appropriate.

For vacuum or overpressure service, use double, pressurised mechanical seals (with thermosiphon) to ensure tightness and protect the product. All architectures described can be supplied CIP/SIP-ready, with drains and sanitary surfaces to minimise downtime and the risk of cross-contamination.

Selecting vertical, bottom-mounted or in-line depends on your objective: low-air homogenisation (TURBINE), in-tank emulsification/particle-size reduction (EMV/EM), bottom sweeping and full drainability (EMF) or continuous production/recirculation (EML/EMLT). For scale-up, maintaining comparable Froude/Reynolds numbers, renewal rate and specific energy input ensures reproducibility from pilot to production.

Which industrial mixer models are in our range?

Below are six core machines that address most scenarios in food & beverage, cosmetics, pharmaceuticals and fine chemicals. The aim is not to list catalogues, but to explain when each architecture is the right fit and what a plant engineer can expect in terms of result and operability.

TURBINE Vertical Mixer

agitador para tanques

A low-to-medium shear vertical mixer that generates strong axial suction and a stable tank circulation without the need for baffles. Its channelled design prevents bulk swirling and minimises air entrainment—critical for sauces, food bases, cosmetic pre-mixes and additive solutions. In small to medium vessels it delivers rapid, repeatable homogenisation with very simple maintenance.

EMV Vertical Emulsifier

emulsionador industrial

The EMV employs a rotor–stator head (one or two stages) to produce fine emulsions and uniform dispersions up to medium–high viscosities. It can operate under vacuum or overpressure and is fully CIP/SIP sanitiseable. Choose EMV when you need a step-change versus conventional mixing: smaller droplet size, no lumps and long-term stability in creams, gels, emulsified sauces, or when dissolving gums and resins.

EM Vertical Emulsifier

emulasionador agitadores industriales tipos Inoxmim

Also based on the rotor–stator principle, the EM provides a multi-stage configuration with interchangeable heads (slotted, perforated, toothed) to tune shear intensity. It is the right choice when the recipe demands intense dispersion or tighter particle-size targets than a single-stage vertical can achieve. It balances installed power, process control and emulsion quality.

EMF Bottom Entry Emulsifier

Emulsionador de fondo con cuchillas de corte fabricantes de maquinaria para hosteleria en Espana InoxMiM

Installed at the base of the reactor, the EMF creates a controlled shear zone that drives recirculation from the bottom upwards. This eliminates dead zones and product build-up and improves heat transfer by sweeping the tank bottom. With single or pressurised double seals, it handles high viscosities, shortens cycle times, and excels in cosmetics and pharmaceutical reactors where drainability and CIP cleanliness are essential.

EML/EMLT Inline Emulsifier

eml

These units process while they pump, enabling recirculation or continuous production with consistent results batch after batch. The EMLT, with multi-tooth heads, delivers higher shear for more viscous or demanding formulations. Preferred when scaling throughput without compromising quality: installed in a bypass or recirculation loop, they accommodate flow/temperature instrumentation and simplify CIP/SIP.

Microniser MICRO

mezclador industrial Micro

A high-shear machine operating at high rpm, capable of achieving sub-10 μm particle sizes and, in suitable formulations, below 1 μm. Its double, cooled mechanical seal and sanitary connections support heat-sensitive products and repeated cleaning cycles. Specify MICRO when final texture and stability depend directly on particle finish: fine suspensions, micro-encapsulates, premium pharma/cosmetic emulsions and technical bases.

How do I choose between vertical, bottom-mounted or in-line?

If your goal is low-air homogenisation in small to medium vessels, a TURBINE vertical is efficient and robust. When the formulation requires a true emulsion and droplet-size reduction, an EMV/EM vertical delivers the necessary in-tank shear.

If the bottleneck is dead zones, drainability or bottom sweeping, the EMF solves it by architecture. For continuous production, fewer batch changeovers and tight quality control via recirculation, an EML/EMLT in-line unit is the direct route. And where the specification calls for a very fine, stable particle size, MICRO is the natural candidate.

What does InoxMIM offer in integration and maintenance?

All wetted parts are AISI 316L, with industrial, food-grade or sanitary finishes as required. Equipment is supplied with single or double mechanical seals (cartridge, with pressurised options), VFDs for speed control, and sanitary connections (DIN/CLAMP/SMS). Designs are modular and accessible, reducing MTTR, and our engineering support covers sizing to target viscosity/flow, CIP/SIP validation, and commissioning.

Frequently asked questions about our industrial mixers

As a rule of thumb, TURBINE is comfortable with pre-mixes and bases of low–medium viscosity. EMV/EM extend the range into medium–high viscosities thanks to the rotor–stator head. With EMF, denser products are handled effectively in the reactor due to bottom-up recirculation. Where the line must run continuously with high viscosities or difficult formulations, EMLT is preferable because of its multi-tooth head. For very fine particle-size targets, MICRO is selected for its shear capability, not merely viscosity handling.

Choose in-tank when the recipe requires direct control over air entrainment, vacuum/pressure and reactor heat transfer. In-line proves advantageous for continuous production, for closing quality via a recirculation loop, or when discharging/filtering while emulsifying. Many plants combine both: pre-mix in tank and finish in-line to ensure reproducibility.

A correctly sized EMV/EM delivers fine, stable emulsions typically in the 5–10 μm range (formulation and head dependent). MICRO can achieve sub-10 μm and reach significantly lower micrometre ranges where the matrix allows. Head selection and specific energy input (rpm and time) are decisive.

Yes. Vertical, bottom-mounted and in-line families are available CIP/SIP-ready. Pressurised double mechanical seals with thermosiphon enable operation under vacuum or overpressure with controlled tightness. Sanitary finish, connections and drainability are specified to the customer’s standard (food, pharma or chemical).

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