This back-up ring is supplied in AS568-332 white PTFE (Teflon) 55 Shore D built to an inside diameter of 2.35 in (59.69 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.77 in (70.36 mm), catalogued under part number TST332SO. It allows a standard o-ring to operate at higher pressures than it could unsupported.
The material holds up against steam, strong acids and bases, and oxidizing media. PTFE (Teflon) is specified for a very wide continuous service temperature range and non-stick, non-contaminating surface characteristics. Continuous operating temperature is published at -65°F (-53.9°C) to 500°F (260°C). Exposure to elemental fluorine at temperature or service requiring elastic recovery will shorten service life.
Maintenance and OEM teams specify it across chemical processing, food and beverage, and pharmaceutical and biotech.
Order part number TST332SO, sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Description 332 PTFE SOLID BACKUP RING FDA
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 2.35 inch (59.69 mm)
Actual Outside Diameter 2.77 inch (70.36 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings