430 PTFE SOLID BACKUP RING FDA

Ordered as TST430SO, this is an AS568-430 white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 5.1 in (129.54 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.65 in (143.51 mm). The back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

The compound resists strong acids and bases, solvents, and nearly all industrial chemicals. That behavior comes from the compound itself: PTFE (Teflon) is known for near-universal chemical inertness and a very wide continuous service temperature range. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C). Exposure to service requiring elastic recovery or elemental fluorine at temperature will shorten service life.

Typical settings include semiconductor fabrication, pharmaceutical and biotech, and aggressive-media pipelines.

Reference part number TST430SO when ordering; the item is sold individually. Nominal inside diameter is listed as 5 1/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.