48 PTFE SOLID BACKUP RING FDA

Part number TST048SO is an AS568-048 white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 4.739 in (120.37 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 4.879 in (123.93 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

PTFE (Teflon) is valued for a very wide continuous service temperature range and one of the lowest coefficients of friction of any solid. The compound resists strong acids and bases, oxidizing media, and nearly all industrial chemicals. The material carries a published service range of -65°F (-53.9°C) to 500°F (260°C). Exposure to elemental fluorine at temperature or service requiring elastic recovery will shorten service life.

Typical settings include pharmaceutical and biotech, laboratory equipment, and chemical processing.

Order part number TST048SO, sold individually. Nominal inside diameter is listed as 4 3/4 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.