568-443 PTFE ORINGS FDA

TFE443 is an AS568-443 white PTFE (Teflon) 55 Shore D O-Ring built to an inside diameter of 7.475 in (189.87 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.025 in (203.84 mm). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.

As a material, PTFE (Teflon) delivers non-stick, non-contaminating surface characteristics and near-universal chemical inertness. This material stands up to solvents, steam, and oxidizing media. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service. It is not the right choice where elemental fluorine at temperature or service requiring elastic recovery are present.

Typical settings include chemical processing, laboratory equipment, and semiconductor fabrication.

Reference part number TFE443 when ordering; the item is sold individually. 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.