2103-319 PTFE S/T BUP FDA

This back-up ring is supplied in AS568-319 white PTFE (Teflon) 55 Shore D with an inside diameter of 1.037 in (26.34 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 1.457 in (37.01 mm), catalogued under part number TST319. It bridges the extrusion gap so the primary seal holds its shape under load.

The material holds up against strong acids and bases, solvents, and oxidizing media. That behavior comes from the compound itself: PTFE (Teflon) is known for one of the lowest coefficients of friction of any solid and non-stick, non-contaminating surface characteristics. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service. Exposure to molten alkali metals or elemental fluorine at temperature will shorten service life.

Common environments for this compound include food and beverage, aggressive-media pipelines, and laboratory equipment.

Reference part number TST319 when ordering; the item is sold individually. Nominal inside diameter is listed as 1 1/16 inch. Review your operating media and conditions against this specification before installation.