APG stocks the TSP142, an AS568-142 white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 2.362 in (59.99 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.568 in (65.23 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.
PTFE (Teflon) is specified here for very wide continuous service temperature range and excellent dielectric properties. The compound resists strong acids and bases, oxidizing media, and solvents. Published continuous service range is -65°F (-53.9°C) to 500°F (260°C). Verify compatibility before use with service requiring elastic recovery or elemental fluorine at temperature.
Typical settings include semiconductor fabrication, laboratory equipment, and food and beverage.
Order part number TSP142, sold individually. Nominal inside diameter is listed as 2 3/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description *2107-142 PTFE SPIRAL B/U FDA
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 2.362 inch (59.99 mm)
Actual Outside Diameter 2.568 inch (65.23 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings