*334 PTFE SOLID BACKUP RING FDA

Part number TST334SO is an AS568-334 white PTFE (Teflon) 55 Shore D Back-Up Ring supplied with an inside diameter of 2.6 in (66.04 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.02 in (76.71 mm). A back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.

PTFE (Teflon) delivers a very wide continuous service temperature range and non-stick, non-contaminating surface characteristics. The material holds up against strong acids and bases, solvents, and nearly all industrial chemicals. Published continuous service range is -65°F (-53.9°C) to 500°F (260°C). It is not the right choice where elemental fluorine at temperature or molten alkali metals are present.

Common environments for this compound include laboratory equipment, aggressive-media pipelines, and chemical processing.

TST334SO ships individually. Nominal inside diameter is listed as 2 5/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.