This back-up ring is supplied in AS568-104 white PTFE (Teflon) 55 Shore D built to an inside diameter of 0.112 in (2.84 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.318 in (8.08 mm), catalogued under part number TST104. It extends o-ring service life by supporting the seal against extrusion under high pressure.
PTFE (Teflon) is specified here for very wide continuous service temperature range and non-stick, non-contaminating surface characteristics. This material stands up to solvents, strong acids and bases, and steam. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service.
Common environments for this compound include pharmaceutical and biotech, chemical processing, and semiconductor fabrication.
Order part number TST104, sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Description 2103-104 PTFE S/T BUP FDA
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 0.112 inch (2.84 mm)
Actual Outside Diameter 0.318 inch (8.08 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings