2107-238 PTFE SPIRAL B/U FDA

Part number TSP238 is an AS568-238 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 3.484 in (88.49 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.762 in (95.55 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

PTFE (Teflon) is widely chosen for one of the lowest coefficients of friction of any solid and non-stick, non-contaminating surface characteristics. It resists steam, oxidizing media, and strong acids and bases. Continuous operating temperature is published at -65°F (-53.9°C) to 500°F (260°C). Verify compatibility before use with molten alkali metals or elemental fluorine at temperature.

Typical settings include food and beverage, semiconductor fabrication, and aggressive-media pipelines.

Reference part number TSP238 when ordering; the item is sold individually. Nominal inside diameter is listed as 3 1/2 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.