2107-268 PTFE SPIRAL B/U FDA

APG stocks the TSP268, an AS568-268 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 8.484 in (215.49 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 8.762 in (222.55 mm). A back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.

Expect good resistance to solvents, steam, and nearly all industrial chemicals. That behavior comes from the compound itself: PTFE (Teflon) delivers a very wide continuous service temperature range and one of the lowest coefficients of friction of any solid. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service.

You will find this material specified across food and beverage, pharmaceutical and biotech, and chemical processing.

Reference part number TSP268 when ordering; the item is sold individually. Nominal inside diameter is listed as 8 1/2 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.