374 PTFE SOLID BACKUP RING FDA

Part number TST374SO is an AS568-374 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 9.225 in (234.32 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 9.645 in (244.98 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

PTFE (Teflon) is known for a very wide continuous service temperature range and one of the lowest coefficients of friction of any solid. It resists steam, solvents, and oxidizing media. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service. Exposure to molten alkali metals or service requiring elastic recovery will shorten service life.

You will find this material specified across pharmaceutical and biotech, aggressive-media pipelines, and food and beverage.

Stocked as TST374SO and sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.