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Anillos de Seguridad

Protecting non-metallic sealing rings

  • Protection of non-metallic sealing rings from extruding
  • Allows the use of PTFE as a sealing ring at high pressures
  • Materials available for all fields of applications

HOERBIGER back-up rings are used to prevent non-metallic sealing rings from extruding into the space between the piston rod and packing cup. Back-up rings, which are typically made of cast iron or bronze material, seal only the end face of the packing case cup. The bore hole has a small clearance from the piston rod. They are suitable for all fields of application in the process, natural gas, or food industry.

Technical data

Back-up rings from to
Piston rod diameter 20 mm (0.78 inches) 200 mm (7.8 inches)
Pressure 3 bar 1,000 bar