JW Wincois a standard parts expert and has worked diligently to bring you a line of衛生產品. What goes into hygienic design? In this post, JW Winco goes over the features, standards, and advantages of hygienic design.
Hygienic Design includes the design principles for the avoidance of design weaknesses, which could favor hygiene-related hazards. The cleaning capability of materials, surfaces, and structural elements are regarded as the central points of Hygienic Design. No dirt of any kind may accumulate or be permanently deposited or must be easily removed.
Reasons for Hygienic Design
在食品工業，醫療技術和製藥行業，產品安全和消費者保護正變得越來越重要。由於其特定的性質，衛生設計中的標準部件可以幫助這些敏感區域的生產過程，並促進製造沒有具有長保質期的防腐劑的產品。
衛生設計的優點
Minimized and reduced cleaning process (this can be up to 25% of the production time), therefore:
- 更多時間可供生產
- Less freshwater consumption
- 降低能耗
- Less cleaning agent required
- 少量生產廢水
- 降低總成本和資源的節省
Legal Basis of Hygienic Design
EN 1672-2：2009“食品機械”
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
Food machinery – General design principles – Part 2
衛生設計的設計要求
材料
- 非生鏽的不鏽鋼
- FDA and EU compliant plastics and elastomers
Surfaces
- Surfaces must be able to be cleaned
- 必須避免由於未對齊的設備配置而導致的步驟
- 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
- 角部應優選地具有6mm或更大的半徑
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易於清潔粗糙度Ra <0.8μm
衛生設計設計原則
ehedg.
- European Hygienic Engineering & Design Group
- A non-profit European consortium of machine and food manufacturers as well their suppliers, research institutes, universities, and government health agencies
- 大約45個指導方針
- Examination of products and issue of certificates
3-A Sanitary Standard, Inc.
- 美國非營利性和獨立協會
- Three interest groups: public and governmental health agencies, machine and food manufacturers
- Over 70 Sanitary Standards
- 檢查設計和流程，證書問題
Seals
Seals have the central function of protecting dead spaces, gaps, and cracks from the penetration of cleaning fluids or product residues.
For this, a defined pre-tension or compression of the seals and wipers is necessary for a reliable and permanent seal in the installed condition. Within the Hygienic Design product family, seal installation spaces and seal cross sections are calculated and designed with simulation software so that the necessary surface compression is achieved on installation and the seal material is not subjected to excess pressure.
A fundamental differentiation can be made between static and dynamic seals (moveable): The static seal, application examples below, show the top faces the mounting surface (sealing ring) and the bottom faces the contact surface (bottom seal) so that the corresponding pressure is achieved by tightening. It should be ensured that all surfaces which make contact with the seal have a surface finish of at least Ra 0.8 µm.
The dynamic seals (moveable) on the adjustable sleeve (wiper) and the ball joint (joint sealing ring) of the foot are designed so that they allow adjustment in both height and angle. Because of this design, the installation space together with the cross-section of the seal ensures a gap-free, pre-tensioned seal. Depending on the version and the type of use, it may be the case that seals may need to be replaced in case of damage or for preventative maintenance. For this, JW Winco supplies the relevant seals as spare parts or offers these under GN 7600 as standard parts for spare parts.
三角現在提供JW Winco的衛生行you can explore這裏. Check out JW Winco’s cleanability test video below.
