262 PTFE SOLID BACKUP RING FDA

Ordered as TST262SO, this is an AS568-262 white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 6.984 in (177.39 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 7.262 in (184.45 mm). The back-up ring installs on the low-pressure side of an o-ring to prevent extrusion into the clearance gap at elevated pressure.

PTFE (Teflon) is specified here for non-stick, non-contaminating surface characteristics and very wide continuous service temperature range. It resists oxidizing media, solvents, and strong acids and bases. 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 semiconductor fabrication, laboratory equipment, and chemical processing.

Reference part number TST262SO when ordering; the item is sold individually. Nominal inside diameter is listed as 7 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.