136 PTFE SOLID BACKUP RING FDA

Part number TST136SO is an AS568-136 white PTFE (Teflon) 55 Shore D Back-Up Ring with an inside diameter of 1.987 in (50.47 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.193 in (55.7 mm). A back-up ring installs on the low-pressure side of an o-ring to prevent extrusion into the clearance gap at elevated pressure.

The compound resists oxidizing media, steam, and strong acids and bases. That behavior comes from the compound itself: PTFE (Teflon) is specified for near-universal chemical inertness and excellent dielectric properties. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C).

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

Reference part number TST136SO when ordering; the item is sold individually. Nominal inside diameter is listed as 2 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.