Ordered as TST460, this is an AS568-460 white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 15.475 in (393.07 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 16.025 in (407.04 mm). The back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.
PTFE (Teflon) is specified here for excellent dielectric properties and very wide continuous service temperature range. Expect good resistance to solvents, nearly all industrial chemicals, and steam. Published continuous service range is -65°F (-53.9°C) to 500°F (260°C).
It sees regular use in laboratory equipment, semiconductor fabrication, and chemical processing.
Order part number TST460, sold individually. Nominal inside diameter is listed as 15 1/2 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Description 2103-460 PTFE S/T BUP FDA
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 15.475 inch (393.07 mm)
Actual Outside Diameter 16.025 inch (407.04 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings