The TST011SO is an AS568-011 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 0.301 in (7.65 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 0.441 in (11.2 mm). This back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.
PTFE (Teflon) delivers near-universal chemical inertness and excellent dielectric properties. Expect good resistance to strong acids and bases, nearly all industrial chemicals, and solvents. The material carries a published service range of -65°F (-53.9°C) to 500°F (260°C). Verify compatibility before use with elemental fluorine at temperature or service requiring elastic recovery.
It sees regular use in food and beverage, laboratory equipment, and chemical processing.
Order part number TST011SO, sold individually. Nominal inside diameter is listed as 5/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Description 011 PTFE SOLID BACKUP RING FDA
Actual Cross Section 0.07 inch (1.78 mm)
Actual Inside Diameter 0.301 inch (7.65 mm)
Actual Outside Diameter 0.441 inch (11.2 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings