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Sealing Solutions for Use in Hydraulic Applications

Today, hydraulic seals are used in many different hydraulic applications. They perform reliably even under extremely high temperature and pressure requirements and when they come into contact with aggressive hydraulic media. Freudenberg Sealing Technologies (FST) develops seals whose materials and geometries are perfectly matched to the increasingly demanding applications and often harsh ambient conditions in fluid technology. In the animations to follow, we would like to present exemplary seal arrangements for use in specific applications. The pressure ranges shown are application-specific – the maximum pressures for the seals are shown in parentheses.

Please note:
The solutions shown here are assumed to be reliable under the framework parameters stated, however no promises, warranties or guarantees of any kind can be made as to their accuracy or suitability for any specific purpose. Therefore, please contact us directly regarding your individual requirements.

Saeling System 1

Sealing system 1

  • Solution for low and medium loads
  • Pressure range up to 260 bar (400 bar) and temperatures up to +80 °C (+100 °C)
  • Characteristics: good price-performance ratio due to the omission of an upstream seal and the use of injection-molded PA guides, simple assembly
  • Very good drift resistance of the piston seal
  • Application example: cylinders for use in agricultural machinery and mini-excavators
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Saeling System 2

Sealing System 2

  • Suited for high load capacity and short and medium service life
  • Pressure range up to 320 bar (400 bar) and temperatures up to +80 °C (+100 °C)
  • Characteristics: good price-performance ratio because an upstream seal has been omitted
  • Very good drift resistance of the piston seal
  • Application example: cylinders for use in truck-mounted loading cranes
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Saeling System 3

Sealing System 3

  • Friction-optimized solution for high load capacity and a long service life
  • Pressure range up to 320 bar (400 bar) and temperatures up to +80 °C (+100 °C)
  • PTFE seals, low stick-slip tendency
  • Extremely good friction behavior
  • Application example: suspension and lifting cylinders
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Saeling System 4

Sealing System 4

  • Solution for high load capacity and a long service life
  • Pressure range up to 320 bar (400 bar) and temperatures up to +80 °C (+100 °C)
  • Characteristics: very good sealing tightness and very good drift resistance of the piston seal
  • Application example: cylinders for medium-heavy construction machinery
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Saeling System 5

Sealing System 5

  • Suited for very high load capacity with a long service life
  • Pressure range up to 400 bar (600 bar) and temperatures up to +100 °C (+110 °C)
  • Features: Materials with increased temperature and media resistance (AU 30000, PA4112)
  • Application example: Cylinders for heavy construction machinery and mining
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