**2107-029 PTFE SPIRAL B/U FDA

Part number TSP029 is an AS568-029 white PTFE (Teflon) 55 Shore D Back-Up Ring supplied with an inside diameter of 1.489 in (37.82 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.629 in (41.38 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.

Expect good resistance to nearly all industrial chemicals, solvents, and steam. PTFE (Teflon) delivers near-universal chemical inertness and one of the lowest coefficients of friction of any solid. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C). It should not be specified for service in elemental fluorine at temperature or service requiring elastic recovery.

You will find this material specified across laboratory equipment, food and beverage, and semiconductor fabrication.

TSP029 ships individually. Nominal inside diameter is listed as 1 1/2 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.