273 PTFE SOLID BACKUP RING FDA

APG stocks the TST273SO, an AS568-273 white PTFE (Teflon) 55 Shore D Back-Up Ring supplied with an inside diameter of 9.734 in (247.24 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 10.012 in (254.3 mm). A back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.

PTFE (Teflon) delivers near-universal chemical inertness and non-stick, non-contaminating surface characteristics. It resists oxidizing media, steam, and solvents. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service. Verify compatibility before use with elemental fluorine at temperature or service requiring elastic recovery.

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

Stocked as TST273SO and sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.