365 PTFE SOLID BACKUP RING FDA

The TST365SO is an AS568-365 white PTFE (Teflon) 55 Shore D Back-Up Ring with an inside diameter of 6.975 in (177.17 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 7.395 in (187.83 mm). This back-up ring installs on the low-pressure side of an o-ring to prevent extrusion into the clearance gap at elevated pressure.

This material stands up to strong acids and bases, nearly all industrial chemicals, and oxidizing media. That behavior comes from the compound itself: PTFE (Teflon) offers one of the lowest coefficients of friction of any solid and non-stick, non-contaminating surface characteristics. Published continuous service range is -65°F (-53.9°C) to 500°F (260°C). Applications involving molten alkali metals or service requiring elastic recovery call for a different compound.

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

This item is sold individually under part number TST365SO. Nominal inside diameter is listed as 7 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.