133 PTFE SOLID BACKUP RING FDA

Part number TST133SO is an AS568-133 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 1.799 in (45.69 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.005 in (50.93 mm). A back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.

Expect good resistance to steam, solvents, and strong acids and bases. PTFE (Teflon) offers near-universal chemical inertness and non-stick, non-contaminating surface characteristics. Continuous operating temperature is published at -65°F (-53.9°C) to 500°F (260°C). Applications involving elemental fluorine at temperature or service requiring elastic recovery call for a different compound.

You will find this material specified across pharmaceutical and biotech, semiconductor fabrication, and aggressive-media pipelines.

Stocked as TST133SO and sold individually. Nominal inside diameter is listed as 1 13/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.