041 PTFE SOLID BACKUP RING FDA

This back-up ring is supplied in AS568-041 white PTFE (Teflon) 55 Shore D measuring an inside diameter of 2.989 in (75.92 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.129 in (79.48 mm), catalogued under part number TST041SO. It bridges the extrusion gap so the primary seal holds its shape under load.

As a material, PTFE (Teflon) is specified for one of the lowest coefficients of friction of any solid and near-universal chemical inertness. This material stands up to nearly all industrial chemicals, steam, and solvents. 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.

It sees regular use in food and beverage, aggressive-media pipelines, and laboratory equipment.

Order part number TST041SO, sold individually. Nominal inside diameter is listed as 3 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.