568-439 FEP ENCAPSULATED SILICONE

APG stocks the TES70439, an AS568-439 red PTFE-Encapsulated Silicone 70 Shore A O-Ring measuring an inside diameter of 6.475 in (164.47 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.025 in (178.44 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. This item is further identified as ORING 70 Durometer.

PTFE-Encapsulated Silicone is specified here for chemical inertness of PTFE with the wide temperature range of silicone and strong resistance to permeation. The compound resists wide temperature swings, nearly all process chemicals, and strong acids and solvents. Published continuous service range is -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.

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

Stocked as TES70439 and sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.