This back-up ring is supplied in AS568-150 white PTFE (Teflon) 55 Shore D measuring an inside diameter of 2.862 in (72.69 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 3.068 in (77.93 mm), catalogued under part number TSP150. It bridges the extrusion gap so the primary seal holds its shape under load.
As a material, PTFE (Teflon) delivers a very wide continuous service temperature range and excellent dielectric properties. The material holds up against steam, oxidizing media, and strong acids and bases. Published continuous service range is -65°F (-53.9°C) to 500°F (260°C). It should not be specified for service in service requiring elastic recovery or elemental fluorine at temperature.
Maintenance and OEM teams specify it across aggressive-media pipelines, chemical processing, and semiconductor fabrication.
Order part number TSP150, sold individually. Nominal inside diameter is listed as 2 7/8 inch. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Description 2107-150 PTFE SPIRAL B/U FDA
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 2.862 inch (72.69 mm)
Actual Outside Diameter 3.068 inch (77.93 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings