Ordered as TSP045, this is an AS568-045 white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 3.989 in (101.32 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 4.129 in (104.88 mm). The back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.
As a material, PTFE (Teflon) delivers excellent dielectric properties and near-universal chemical inertness. It resists strong acids and bases, nearly all industrial chemicals, and solvents. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service. Exposure to service requiring elastic recovery or molten alkali metals will shorten service life.
You will find this material specified across chemical processing, semiconductor fabrication, and laboratory equipment.
TSP045 ships individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Description **2107-045 PTFE SPIRAL B/U FDA
Actual Cross Section 0.07 inch (1.78 mm)
Actual Inside Diameter 3.989 inch (101.32 mm)
Actual Outside Diameter 4.129 inch (104.88 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings