131 PTFE SOLID BACKUP RING FDA

TST131SO is an AS568-131 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 1.674 in (42.52 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.88 in (47.75 mm). In service, this back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

As a material, PTFE (Teflon) delivers one of the lowest coefficients of friction of any solid and non-stick, non-contaminating surface characteristics. Expect good resistance to strong acids and bases, steam, and nearly all industrial chemicals. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C). Applications involving elemental fluorine at temperature or molten alkali metals call for a different compound.

You will find this material specified across food and beverage, pharmaceutical and biotech, and laboratory equipment.

This item is sold individually under part number TST131SO. 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.