568-327 FEP ENCAPSULATED SILICONE

This o-ring is supplied in AS568-327 red PTFE-Encapsulated Silicone 70 Shore A supplied with an inside diameter of 1.725 in (43.82 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.145 in (54.48 mm), catalogued under part number TES70327. It compresses into its gland to block fluid or gas migration across a joint. Supplementary detail from the product record: ORING 70 Durometer.

The compound resists nearly all process chemicals, wide temperature swings, and steam. PTFE-Encapsulated Silicone is widely chosen for chemical inertness of PTFE with the wide temperature range of silicone and a non-contaminating, non-stick sealing surface. The material carries a published service range of -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, pharmaceutical manufacturing, and chemical processing.

Stocked as TES70327 and sold individually. Nominal inside diameter is listed as 1 3/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.