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New hygienic design gearboxes for food, beverage, packaging and pharmaceutical manufacturing

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Treotham introduces a new range of gearboxes designed to meet stringent requirements of the food and pharmaceutical packaging industries.

Certified according to EHEDG (European Hygienic Engineering & Design Group) rules to ensure optimal material resistance and cleanability, the new hygienic design gearboxes feature a housing, which is completely free of edges, dead spaces and gaps that could provide a breeding ground for bacteria and microorganisms or act as dirt traps.

The gearboxes feature coaxial, dynamic planetary gearheads in several different performance classes to provide robustness, resistance and cleanability – the three key elements when determining the housing design, choice of materials and processing techniques for any hygienic gearboxes. 

Just like its adapter plate, the gearbox housing is manufactured from stainless steel 1.4404 / AISI 316L – a low carbon steel approved by the US FDA for food contact that offers high resistance to cleaning and washdown fluids such as disinfectants containing hypochlorite or chlorinated alkaline foam cleaners.

All stainless steel surfaces of the hygienic design gearboxes are electro-polished with a roughness of either 0.8 µm Ra as stipulated for food processing applications, or 0.4 µm Ra, which is the accepted standard for the pharmaceutical industry. 

This special surface treatment minimises the risk of product residue adhesion and helps disinfectants or cleaning materials drain off after the allocated exposure time without leaving any residues.

The hygienic design extends to the seals on both the motor and the output side of the gearbox. The seals are made from PTFE, better known as Teflon, a chemically inert material that is resistant to heat as well as a wide range of media.

Owing to its hygienic surface properties and non-stick effect, PTFE also conforms to the requirements of the US FDA and is suitable wherever hygienic cleaning is a legal requirement in the manufacturing process.

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