hydrogenated acrylonitrile butadiene rubber (H-NBR) H
GN 5435 Stainless Steel-Star knobs are intended for use in hygiene areas. The sealed mounting surface enables fastening without dead spaces. The high quality finish and the large corner radii prevent adherence of dirt and facilitate cleaning.
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 manufacture of products with a long shelf life, which are free from preservatives.
Less and shorter cleaning work (this can be up to 25 % of the production time), therefore
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
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
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
3-A Sanitary Standard, Inc.
For the standard parts which are listed in Hygienic Design, 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 pressing 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 moving seals:
Is the static seal, application examples shown below 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 al least Ra 0.8 µm.
The moving seals 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. With these too, 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, Elesa+Ganter supplies the relevant seals as spare parts or offers these under GN 7600 as standard parts for spare parts.
Don’t delay, give OIC a call and talk to us about your industrial application. Our aim is to help your business choose the right Elesa+Ganter element for the function you need. Whether you need to clamp, close, connect, control, level, manoeuvre, measure or set. OIC has an Elesa+Ganter machine element to fit your need.
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