APG stocks the TSP329, an AS568-329 white PTFE (Teflon) 55 Shore D Back-Up Ring supplied with an inside diameter of 1.975 in (50.17 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.395 in (60.83 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.
PTFE (Teflon) offers one of the lowest coefficients of friction of any solid and excellent dielectric properties. It resists solvents, steam, and oxidizing media. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service.
Common environments for this compound include laboratory equipment, chemical processing, and semiconductor fabrication.
Stocked as TSP329 and sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description 2107-329 PTFE SPIRAL B/U FDA
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 1.975 inch (50.17 mm)
Actual Outside Diameter 2.395 inch (60.83 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings