568-388 FEP ENCAPSULATED SILICONE

This o-ring is supplied in AS568-388 red PTFE-Encapsulated Silicone 70 Shore A built to an inside diameter of 18.953 in (481.41 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 19.373 in (492.07 mm), catalogued under part number TES70388. It compresses into its gland to block fluid or gas migration across a joint. This item is further identified as ORING 70 Durometer.

The compound resists wide temperature swings, steam, and strong acids and solvents. That behavior comes from the compound itself: PTFE-Encapsulated Silicone is specified for a seamless PTFE jacket over a resilient silicone core and strong resistance to permeation. Published continuous service range is -75°F (-59.4°C) to 400°F (204.4°C). Exposure to installation over sharp edges or tight-radius dynamic flexing will shorten service life.

You will find this material specified across cryogenic and high-temperature equipment, food and beverage processing, and pharmaceutical manufacturing.

This item is sold individually under part number TES70388. Nominal inside diameter is listed as 19 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.