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The STB09 profile is an endless / solid back-up ring design that is precision machined and used to protect O-Rings and other dynamic seals where system pressures are greater than the capabilities of the seal alone or where high temperatures and excessive clearance / extrusion gaps are present.

The STB09 is available to suit the following standard O-Ring gland sizes including BS1806, BS4518, AS568, ISO3601 and almost any custom sizes you may require.

This back-up ring is often used in the oil and gas industry where high pressure / high temperature (HPHT) applications exist.

This part is available in many of our PTFE, Fluoropolymer, thermoplastic and thermoplastic elastomer materials to suit every application, talk to our technical team to discuss your requirements.