Ordered as TFE428, this is an AS568-428 white PTFE (Teflon) 55 Shore D O-Ring supplied with an inside diameter of 4.85 in (123.19 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.4 in (137.16 mm). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
It resists steam, strong acids and bases, and solvents. PTFE (Teflon) delivers near-universal chemical inertness and a very wide continuous service temperature range. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service. It is not the right choice where molten alkali metals or elemental fluorine at temperature are present.
Typical settings include laboratory equipment, pharmaceutical and biotech, and chemical processing.
Order part number TFE428, sold individually. Check the compound against your process media, pressure and temperature before committing to a design.
Description 568-428 PTFE ORINGS FDA
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 4.85 inch (123.19 mm)
Actual Outside Diameter 5.4 inch (137.16 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium