APG stocks the TST1.498X.119X.062, a white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 119 mm (4.685 in), a cross section of 1.5 mm (0.059 in), and an outside diameter of 122 mm (4.8 in). A back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.
Expect good resistance to steam, solvents, and oxidizing media. PTFE (Teflon) is known for excellent dielectric properties and near-universal chemical inertness. Continuous operating temperature is published at -65°F (-53.9°C) to 500°F (260°C). Exposure to elemental fluorine at temperature or service requiring elastic recovery will shorten service life.
It sees regular use in aggressive-media pipelines, laboratory equipment, and pharmaceutical and biotech.
Stocked as TST1.498X.119X.062 and sold individually. Review your operating media and conditions against this specification before installation.
Description *SPLIT PTFE B/U 1.498X.119X.062” HT FDA
Actual Outside Diameter 122 mm (4.8 inch)
Actual Cross Section 1.5 mm (0.059 inch)
Actual Inside Diameter 119 mm (4.685 inch)
Measurement System Metric
Product Category O-Rings - Backup Rings