In the food industry, medical technology and the pharmaceutical industry, product safety and consumer protection are becoming increasingly important. Due to their specific properties, standard parts in Hygienic Design can assist the production process in these sensitive areas and facilitate the manufacturing of products free from preservatives that have long shelf life.
Advantages of Hygienic Design
Minimized and reduced cleaning process (this can be up to 25% of the production time), therefore
- More time available for production
- Less fresh water consumption
- Lower energy consumption
- Less cleaning agent required
- Less production of waste water
- Lower total costs and saving of resources
Legal Basis of Hygienic Design
EN 1672-2:2009 “Food machinery”
- Machines must be able to be cleaned, i.e. they must be designed and constructed so that dirt can be removed with the recommended cleaning methods.
Machinery directive 2006/42/EC
- Machines must be designed so that
- materials can be easily and fully cleaned before each use and no risk of infections or illness is created.
DIN EN ISO 14519:2008-07
- Hygiene requirements for the design of machines
DIN EN 1672:2009-07
Design Requirements for Hygienic Design
Material
- Non-rusting Stainless Steels
- FDA and EU compliant plastics and elastomers
Surfaces
- Surfaces must be able to be cleaned
- Steps due to appliance configurations which are not aligned must be avoided
- Seals must be designed so that no gaps occur
- O-ring grooves must be hygienically designed
- Contact with the product to be manufactured must be ruled out
- Corners should preferably have a radius of 6 mm or more
Design / Geometry
- The interior and exterior areas of all appliances, components or piping must be self-draining or be able to be drained and easy to clean.
Surface properties and roughness
- Easy to clean with Ra < 0.8 μm
Design Principles for Hygienic Design
- European Hygienic Engineering & Design Group
- Non-profit European consortium of machine and food manufacturers as well their suppliers, research institutes, universities and government health agencies
- Approximately 45 guidelines
- Examination of products and issue of certificates
- Non profit and independent association in the USA
- Three interest groups: public and governmental health agencies, machine and food manufacturers
- Over 70 Sanitary Standards
- Examination of designs and processes, issue of certificates
