Sealing Tecnologies Dichtomatik
Piston Seals
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Piston Seals

Dynamic and Static Sealing of the Piston Against the Cylinder Barrel

To build up pressure in the piston chamber, piston seals seal the piston against the cylinder barrel. Due to the wide range of requirements in hydraulic applications (such as pressure, pressure peaks, sliding speeds, temperatures, and process media) choosing the right piston seal is very important. The Dichtomatik product brand portfolio offers a wide range of elastomer and thermoplastic seals, such as the K, KK, KNA, KPOR, or N series. The piston seals are used for hydraulic cylinders in mobile hydraulics, agricultural machinery, construction machinery and presses.

Benefits at a Glance

  • Broad range of product types and materials
  • Temperature and media resistant
  • Very good wear behavior by reduced friction and therefore good lifetime
  • No stick-slip effect
  • Single- and double-acting piston seal types
  • Symmetrical and asymmetrical piston seal designs
  • Product types for especially high loads
  • Very good price-performance ratio
  • Suitable for many industrial applications

Important note: Dichtomatik products comply with common industrial standards and therefore are suitable for many applications excluding safety-critical ones like Automotive. Premium Freudenberg products are the right choice for all applications ensuring highest quality and safety standards and therefore optimal total cost of ownership.

Piston Seals

Choose the Right Product

Out of Six Types

  • KNA series: asymmetrical U-ring for one-sided pressure load
  • N series: symmetrical U-ring being suitable for one-sided pressure load (can also be used as a rod seal)
  • KPOR series: combination of a PTFE-bronze sealing element and an O-ring (NBR) that serves as a pre-tensioning element
  • KK series: compact seal consisting of a sealing element combined with a backup ring and a guide element
  • KDS01: three-part sealing system for one-sided pressure load with pressure- and back-up ring as well as V-packing made of NBR fabric
  • K series: double-acting piston seals made of TPU and an elastomeric pre-tensioning element. (K70 with an O-ring and K84 with a rectangular ring)

Please note that resistances, pressures and temperatures are mutually influenced by various parameters.

Related Documents

Product Portfolio

Freudenberg
Sealing products setting benchmarks

Premium products and individual sealing solutions of the Freudenberg brand are the perfect choice for any application. Uncompromising quality (0-defect strategy) and excellent performance ensure full safety and optimized total cost of ownership (TCO).

Freudenberg Piston Seals

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Do you have any questions? Would you like a regional expert consultation on the sealing solution that best meets your requirements? We look forward to assisting you with your inquiry.

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