568-171 FEP ENCAPSULATED SILICONE

Part number TES70171 is an AS568-171 red PTFE-Encapsulated Silicone 70 Shore A O-Ring built to an inside diameter of 7.987 in (202.87 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 8.193 in (208.1 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. The catalog record notes: ORING 70 Durometer.

The compound resists steam, strong acids and solvents, and wide temperature swings. That behavior comes from the compound itself: PTFE-Encapsulated Silicone delivers strong resistance to permeation 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). It is not the right choice where tight-radius dynamic flexing or installation over sharp edges are present.

Maintenance and OEM teams specify it across cryogenic and high-temperature equipment, chemical processing, and pharmaceutical manufacturing.

Order part number TES70171, sold individually. Nominal inside diameter is listed as 8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.