*2107-458 PTFE SPIRAL B/U FDA

This back-up ring is supplied in AS568-458 white PTFE (Teflon) 55 Shore D measuring an inside diameter of 14.475 in (367.67 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 15.025 in (381.64 mm), catalogued under part number TSP458. It installs on the low-pressure side of an o-ring to prevent extrusion into the clearance gap at elevated pressure.

As a material, PTFE (Teflon) offers non-stick, non-contaminating surface characteristics and near-universal chemical inertness. This material stands up to nearly all industrial chemicals, strong acids and bases, and oxidizing media. The material carries a published service range of -65°F (-53.9°C) to 500°F (260°C). Applications involving elemental fluorine at temperature or service requiring elastic recovery call for a different compound.

Typical settings include pharmaceutical and biotech, semiconductor fabrication, and food and beverage.

This item is sold individually under part number TSP458. Nominal inside diameter is listed as 14 1/2 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.