Freudenberg Sealing Technologies
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The Challenge: Hygienic Design

Product quality and safety for the consumer are essential for the production of sensitive goods, such as foods, beverages and pharmaceuticals. In order to fulfill these strict purity demands, it is one of the most important challenges for food and beverage companies to identify seals that comply with the so-called Hygienic Design Standards.

These include different aspects, such as industry- and country-specific legal regulations (FDA, NSF 51, 3-A® Sanitary Standards, GB 4806 & GB 9685, EU (Reg.) 1935/2004 etc.), the prevention of dead spaces, a comprehensive cleaning of the application and plant and many more.

Our Hygienic Product Line

Hygienic Pressure Seal

Hygienic Pressure Seal

  • Unique and innovative combination of premium elastomers Fluoroprene® XP or EPDM and high-performance PTFE Quantum®
  • Flat contact surface to the process medium prevents dead spaces
  • Secure fit and minimum contact surface with the medium
  • Low friction, reduced wear and increased service life
  • Suitable for high pressures up to 150 bar
  • Good dry running properties
  • High media and temperature resistance
  • Sealing materials have all key approvals for the food and beverage industry, like for example FDA or EU (Reg.) 1935/2004 and 10/2011
Hygienic Forseal

Hygienic Forseal

  • Combination of a groove ring made of PTFE Quantum® , which is activated by a pressure ring made of Fluoroprene® XP or EPDM
  • Replacement of the conventional stainless steel spring with resulting dead space by an elastomeric contact pressure element
  • Flat contact surface to the process medium
  • Good dry running properties
  • High media and temperature resistance
  • Mounting in undivided installation space possible
  • Customized variants available, for example a double seal and an anti-rotation device
  • Seal materials have all key certifications for the food and beverage industry
Hygienic Usit

Hygienic Usit®

  • Suited for screw connections with direct product contact in open and closed manufacturing processes
  • Prevention of germ formation and contamination under the screw head
  • EHEDG certified (Type EL Class I AUX)
  • Optimally matched screw, cap nut and usit composite
  • Elastomer bead made of premium sealing materials (70 EPDM 291, 75 Fluoroprene® XP 45 or 70 EPDM 253815) that have all key approvals for the food and beverage sector, such as FDA or 3-A® Sanitary Standards
Radiamatic® HTS II 9539 VL

Radiamatic® HTS II 9539 VL

  • Specially developed radial shaft seal for applications in the process industry made of high-performance PTFE
  • Dead space free version
  • Advanced sealing lip enables hygiene and purity
  • Clamping ring technology makes secure fit possible
  • Good dry running properties
  • Good wear resistance and low friction
  • High media and temperature resistance
  • Sealing materials that come into direct contact with the process medium have all key certifications for the food and beverage sector, e.g. FDA, EU (Reg.) 10/2011 or 3-A® Sanitary Standards
Shaft Seal

Shaft Seal

  • Specially developed customized designs for the strict demands of the process industry
  • Easy assembly in the application
  • Durability, low friction and high temperature resistance
  • Premium seal materials that comply with the industry-specific legal requirements, e.g. FDA, 3-A® Sanitary Standards or EU (Reg.) 1935/2004
Radial Seal for Seat Valves

Radial Seal for Seat Valves

  • Sealing of two process media from each other
  • Separation of the dynamic and static functions and thus independent and optimal adjustment of the sealing function
  • Reduced volume of the elastomer and displacement spaces minimize the temperature dependence of the seal
  • Good wear resistance and low friction
  • Sealing materials comply with the relevant industry-specific legal regulations
Butterfly Valve Seal

Butterfly Valve Seal

  • Compression only in the areas required for sealing
  • Reduced mechanical stress in the seal
  • Better hygienic behavior, as fewer cracks occur
  • Longer service life
  • Excellent resistance to aggressive media and extreme temperatures
  • Wide range of materials (e.g. HNBR, EPDM or Fluoroprene® XP) that comply with the industry-specific legal requirements, such as FDA or EU (Reg.) 1935/2004
Clamp Seal with Support Ring

Clamp Seal with Support Ring

  • Designed for flanges according to ISO 2852 and DIN 32676
  • Defined compression during installation due to the integrated support ring
  • Prevents destruction of the sealing ring by overpressure
  • No projections or recesses, but a surface flush with the product to avoid dead spaces
  • Different sealing materials available (e.g. VMQ, EPDM or Fluoroprene® XP) that have the industry-specific approvals, like for example FDA, 3-A® Sanitary Standards or EU (Reg.) 1935/2004
Aseptic O-Ring

Aseptic O-Ring

  • Available for aseptic flange connections according to DIN 11864
  • Dead space free
  • Precise customized O-Ring calculation possible
  • Flush termination with the inside pipe diameter
  • Easy assembly in the application
  • Wide range of materials that offer very good chemical resistance and comply with the relevant industry-specific legal regulations

What Makes Us the Right Partner for You

Our Competences at a Glance

  • Development expertise for premium elastomers and plastics with the relevant approvals and according to the market requirements as well as in-house test laboratories as part of our Material Competence
  • Partnership developments, comprehensive product- and material-know-how, logistic services as well as market-specific online tools as part of our consulting and Service Competence
  • Customer-specific and hygienic seals and FEM-Analysis as part of our Design Competence
  • Worldwide production possibilities and our Freudenberg Xpress® service as part of our Manufacturing Competence
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