The Collette GRAL-25 is a used mixer and blender — sometimes referred to as a high-shear granulator or wet granulator in pharmaceutical and chemical processing circles — designed for intensive mixing, granulating, and blending applications. Collette is a well-established manufacturer of high-shear mixing and granulation equipment, widely recognised in the pharmaceutical, food, and chemical industries for producing robust, hygienic processing machinery.
This 1994 machine is constructed throughout in stainless steel grade 1.4301 (AISI 304), giving it the corrosion resistance expected in cleanroom and production environments. The primary vessel has a capacity of 25 litres, with internal dimensions of 375 mm diameter by 275 mm depth. A second, smaller vessel measuring 245 mm diameter by 200 mm depth is included, and a further additional 10-litre jacketed vessel is also supplied with the unit, making this a particularly versatile package. The jacketed vessel allows temperature-controlled processing, which is relevant for heat-sensitive or moisture-sensitive formulations.
The main drive motor is rated at 4 kW, operating on 400 V at 1,440 rpm. A variable speed drive is fitted, and the rotor runs at two selectable speeds — 1,435 rpm and 2,875 rpm — allowing the operator to adapt the mixing intensity to the product and process requirements. A lump breaker with two speeds is also integrated, supporting effective granule size reduction during processing. An inlet of 50 mm diameter is present, and the machine is equipped with a cover, a timer, and full switchgear, noted as supplied in as-is condition.
The unit is mounted on wheels, making it mobile within a production or warehouse environment. Its footprint measures 1 × 2 metres, with a total height of 1.65 metres. The machine is located in Barneveld, Netherlands, and carries serial number 94GR.
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