This o-ring is supplied in AS568-243 white PTFE (Teflon) 55 Shore D supplied with an inside diameter of 4.109 in (104.37 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.387 in (111.43 mm), catalogued under part number TFE243. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
It resists solvents, steam, and nearly all industrial chemicals. PTFE (Teflon) is known for a very wide continuous service temperature range and near-universal chemical inertness. Continuous operating temperature is published at -65°F (-53.9°C) to 500°F (260°C). It should not be specified for service in service requiring elastic recovery or elemental fluorine at temperature.
Common environments for this compound include pharmaceutical and biotech, laboratory equipment, and aggressive-media pipelines.
Order part number TFE243, sold individually. Nominal inside diameter is listed as 4 1/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description 568-243 PTFE ORINGS FDA
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 4.109 inch (104.37 mm)
Actual Outside Diameter 4.387 inch (111.43 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium