This back-up ring is supplied in AS568-334 white PTFE (Teflon) 55 Shore D supplied with an inside diameter of 2.6 in (66.04 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.02 in (76.71 mm), catalogued under part number TST334. It allows a standard o-ring to operate at higher pressures than it could unsupported.
PTFE (Teflon) is known for near-universal chemical inertness and one of the lowest coefficients of friction of any solid. The material holds up against solvents, strong acids and bases, and steam. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C). It is not the right choice where service requiring elastic recovery or elemental fluorine at temperature are present.
Common environments for this compound include laboratory equipment, pharmaceutical and biotech, and aggressive-media pipelines.
Order part number TST334, sold individually. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description 2103-334 PTFE S/T BUP FDA
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 2.6 inch (66.04 mm)
Actual Outside Diameter 3.02 inch (76.71 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings