APG stocks the TST007SO, an AS568-007 white PTFE (Teflon) 55 Shore D Back-Up Ring with an inside diameter of 0.145 in (3.68 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.285 in (7.24 mm). A back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.
As a material, PTFE (Teflon) delivers a very wide continuous service temperature range and one of the lowest coefficients of friction of any solid. The compound resists nearly all industrial chemicals, solvents, and steam. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C).
It sees regular use in food and beverage, aggressive-media pipelines, and pharmaceutical and biotech.
Order part number TST007SO, sold individually. Nominal inside diameter is listed as 5/32 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Description 007 PTFE SOLID BACKUP RING FDA
Actual Cross Section 0.07 inch (1.78 mm)
Actual Inside Diameter 0.145 inch (3.68 mm)
Actual Outside Diameter 0.285 inch (7.24 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings