134 PTFE SOLID BACKUP RING FDA

Ordered as TST134SO, this is an AS568-134 white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 1.862 in (47.29 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.068 in (52.53 mm). The back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.

Expect good resistance to nearly all industrial chemicals, strong acids and bases, and steam. That behavior comes from the compound itself: PTFE (Teflon) is widely chosen for non-stick, non-contaminating surface characteristics and excellent dielectric properties. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C). Verify compatibility before use with molten alkali metals or elemental fluorine at temperature.

Typical settings include aggressive-media pipelines, semiconductor fabrication, and chemical processing.

Order part number TST134SO, sold individually. Nominal inside diameter is listed as 1 7/8 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.