TST103SO is an AS568-103 white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 0.081 in (2.06 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.287 in (7.29 mm). In service, this back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.
The compound resists solvents, oxidizing media, and strong acids and bases. PTFE (Teflon) is specified for near-universal chemical inertness and a very wide continuous service temperature range. The material carries a published service range of -65°F (-53.9°C) to 500°F (260°C).
You will find this material specified across chemical processing, food and beverage, and semiconductor fabrication.
TST103SO ships individually. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Description 103 PTFE SOLID BACKUP RING FDA
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 0.081 inch (2.06 mm)
Actual Outside Diameter 0.287 inch (7.29 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings