The TST433 is an AS568-433 white PTFE (Teflon) 55 Shore D Back-Up Ring supplied with an inside diameter of 5.475 in (139.07 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.025 in (153.04 mm). This back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.
PTFE (Teflon) offers a very wide continuous service temperature range and non-stick, non-contaminating surface characteristics. This material stands up to solvents, strong acids and bases, and steam. The material carries a published service range of -65°F (-53.9°C) to 500°F (260°C). It should not be specified for service in molten alkali metals or elemental fluorine at temperature.
Typical settings include chemical processing, aggressive-media pipelines, and semiconductor fabrication.
Order part number TST433, sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Description 2103-433 PTFE S/T BUP FDA
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 5.475 inch (139.07 mm)
Actual Outside Diameter 6.025 inch (153.04 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings