O-rings sealing for static and dynamic applications.

O-rings are independent, double effects sealing systems, used in static applications. The initial radial or axial compression at installation gives the O-ring its primary sealing capacity. This combined with the pressure of the system allows for a sealing capacity that increases with increasing pressure. O-rings are generally used as primary sealing rings or as energizing elements (combined with PTFE slippers or scrapers) and cover a variety of applications.
O-rings are commonly used in static systems for radial or axial applications. There are several advantages to O-rings:

  • inexpensive solutions;
  • require a simple single groove design (lower design costs);
  • easily installed;
  • come in a variety of material to be easily adapted to the majority of fluids;
  • are widely available due to their large range of applications;

Back-up rings

Back-up rings have no sealing properties. They are supportive protection systems to avoid extrusion of the sealing element under pressure. They are generally inserted in the groove with elastomeric gaskets (typically O-rings or X-rings). Extrusion resistant rings have a rectangular crosssection.

Coated O-ring FEP-PFA

The O-Rings Viton Silicone EPDM, lined with FEP (Fluorinated Ethylene Propylene) or PFA (Perfluoroalkoxy), are suitable for high level performance. The FEP O-Rings are encapsulated in a gasket of FEP or PFA which has high malleable and thermoplastic characteristics and covers the elastomeric material hermetically and continuously.

  • Highly resistant to break
  • High melting point
  • Low friction coefficient
  • Temperatures range from -195° to 260°
  • According to FDA 21 CRF. 177.15550

Fridle Group: italian leader in the distribution of sealing solutions. For more informations, see our O-Rings catalogue.