TST432SO is an AS568-432 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 5.35 in (135.89 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.9 in (149.86 mm). In service, this back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.
The compound resists steam, oxidizing media, and solvents. PTFE (Teflon) is known for excellent dielectric properties and non-stick, non-contaminating surface characteristics. Published continuous service range is -65°F (-53.9°C) to 500°F (260°C).
It sees regular use in aggressive-media pipelines, laboratory equipment, and semiconductor fabrication.
Stocked as TST432SO and sold individually. Nominal inside diameter is listed as 5 3/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Description 432 PTFE SOLID BACKUP RING FDA
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 5.35 inch (135.89 mm)
Actual Outside Diameter 5.9 inch (149.86 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings