568-449 PTFE ORINGS FDA

Part number TFE449 is an AS568-449 white PTFE (Teflon) 55 Shore D O-Ring measuring an inside diameter of 9.975 in (253.37 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 10.525 in (267.34 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Expect good resistance to solvents, strong acids and bases, and nearly all industrial chemicals. That behavior comes from the compound itself: PTFE (Teflon) is widely chosen for a very wide continuous service temperature range and near-universal chemical inertness. Published continuous service range is -65°F (-53.9°C) to 500°F (260°C). Applications involving molten alkali metals or elemental fluorine at temperature call for a different compound.

You will find this material specified across semiconductor fabrication, chemical processing, and laboratory equipment.

Reference part number TFE449 when ordering; the item is sold individually. Nominal inside diameter is listed as 10 inch. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.