Part number TST346SO is an AS568-346 white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 4.1 in (104.14 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.52 in (114.81 mm). A back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.
Expect good resistance to nearly all industrial chemicals, strong acids and bases, and solvents. PTFE (Teflon) is known for non-stick, non-contaminating surface characteristics and excellent dielectric properties. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service.
Typical settings include laboratory equipment, semiconductor fabrication, and aggressive-media pipelines.
Order part number TST346SO, sold individually. Check the compound against your process media, pressure and temperature before committing to a design.
Description 346 PTFE SOLID BACKUP RING FDA
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 4.1 inch (104.14 mm)
Actual Outside Diameter 4.52 inch (114.81 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings