458 PTFE SOLID BACKUP RING FDA

Part number TST458SO is an AS568-458 white PTFE (Teflon) 55 Shore D Back-Up Ring with an inside diameter of 14.475 in (367.67 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 15.025 in (381.64 mm). A back-up ring 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 excellent dielectric properties. Expect good resistance to steam, strong acids and bases, and oxidizing media. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C). Verify compatibility before use with elemental fluorine at temperature or molten alkali metals.

Common environments for this compound include chemical processing, aggressive-media pipelines, and semiconductor fabrication.

TST458SO ships individually. Nominal inside diameter is listed as 14 1/2 inch. Check the compound against your process media, pressure and temperature before committing to a design.