**568-178 PTFE ORINGS FDA

TFE178 is an AS568-178 white PTFE (Teflon) 55 Shore D O-Ring with an inside diameter of 9.737 in (247.32 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 9.943 in (252.55 mm). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, PTFE (Teflon) is widely chosen for one of the lowest coefficients of friction of any solid and near-universal chemical inertness. This material stands up to steam, strong acids and bases, and oxidizing media. 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.

It sees regular use in pharmaceutical and biotech, food and beverage, and chemical processing.

Stocked as TFE178 and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.