**568-283 PTFE ORINGS FDA

This o-ring is supplied in AS568-283 white PTFE (Teflon) 55 Shore D with an inside diameter of 16.955 in (430.66 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 17.233 in (437.72 mm), catalogued under part number TFE283. It creates a positive seal at flange, piston and rod interfaces without added hardware.

PTFE (Teflon) is specified here for one of the lowest coefficients of friction of any solid and excellent dielectric properties. The compound resists oxidizing media, steam, and strong acids and bases. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C). Exposure to elemental fluorine at temperature or molten alkali metals will shorten service life.

Common environments for this compound include aggressive-media pipelines, semiconductor fabrication, and laboratory equipment.

Reference part number TFE283 when ordering; the item is sold individually. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.