Rotary Clearner - PR Series


The rotary cleaner is a grain pre-cleaning system consisting of a central body containing a rotating drum formed by an inclined drive shaft, connected to spoked wheels that act as a support for the various perforated sheets.
Product is fed into the machine through an in-feed pipe connected to a spout that carries it into the rotating drum. The material is kept in the centre of the drum by two shakers and passes through the various sheets, before exiting through a discharge hopper. At the end of the machine is another hopper which is used to collect waste deriving from the cleaning cycle.

Metalmont PR Series cleaners are suitable for cleaning granular materials, particularly cereals, seeds and their derivatives. In designing these products, Metalmont has scrupulously applied the latest and most stringent standards with regard to operator safety, reliability in the most arduous working conditions and construction quality, with the aim of reducing energy consumption and maintenance costs.

Metalmont PR Series cleaners are also available on request with ATEX 22 certification. The standard operating temperature range is 0 to 40 °C.

Information on our past installations and customer portfolio is available on request.


The range of Metalmont PR Series cleaners comprises 5 models, differentiated by their typical load capacity. The typical nominal load capacity is calculated based on wheat with volumetric mass 0.78 t/m3, moisture content 16%, max. impurity 2%. With reference to the various models, the indicative characteristics are:
Model Load capacities Power Drum ΓΈ Grids surface area N°  of Gridsstrong>
  t/h kW mm m^2  
PR 9/3 60 2,2 900 6,80 3
PR 9/4 75 2,2 900 9,50 4
PR 12/3 120 3,0 1200 11,25 3
PR 12/4 150 4,0 1200 15,00 4
PR 12/5 200 5,5 1200 18,75 5
Metalmont PR Series cleaners can be customised on request:
  • Grid perforations
  • Galvanised or powder coated frame
  • Stainless steel frame


Metalmont PR Series cleaners are available with a series of accessories that facilitate their effective installation in the plant.

Loading and discharge: for both loading and discharge various hoppers are available for connection to the machine. The in-feed sections are always quadrangular whereas the out-feed sections can be round, with or without trim, or square according to need, in different thicknesses.

Mezzanine platforms: at the customer’s request, Metalmont can build intermediate floors for ideal positioning of the cleaner inside the plant, accompanied if necessary by other machines such as PA series aspirator cleaners.

Metal joinery components: in addition to specific accessories for the correct installation of its machines, Metalmont is also a long-standing supplier of more general but equally useful plant access and structural solutions such as staircases, rest platforms, inspection platforms, walkways, frameworks and bracketing of all kinds, from simple brackets to backstays for supporting long sections of piping, shelves and stands.

Product Detail

Rotary Clearner - PR Series

Machine conformity certification

Metalmont PR Series cleaners conform to current legislative requirements and in particular:
  • Machinery Directive 2006/42/EC
  • Low Voltage Directive 2006/95/EC
  • Electromagnetic Compatibility Directive 2004/108/EC
On request, Metalmont can supply the same machine suitable for zone 22 in accordance with ATEX Directory 99/92/EC. Phonometric risk analysis tests demonstrate that the noise generated by the machine during normal operation is lower than 80 dB(A).
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