APG stocks the TST124SO, an AS568-124 white PTFE (Teflon) 55 Shore D Back-Up Ring supplied with an inside diameter of 1.237 in (31.42 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.443 in (36.65 mm). A back-up ring allows a standard o-ring to operate at higher pressures than it could unsupported.
The compound resists nearly all industrial chemicals, steam, and solvents. PTFE (Teflon) delivers excellent dielectric properties and one of the lowest coefficients of friction of any solid. Continuous operating temperature is published at -65°F (-53.9°C) to 500°F (260°C). It is not the right choice where service requiring elastic recovery or molten alkali metals are present.
Common environments for this compound include food and beverage, chemical processing, and semiconductor fabrication.
Order part number TST124SO, sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Description 124 PTFE SOLID BACKUP RING FDA
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 1.237 inch (31.42 mm)
Actual Outside Diameter 1.443 inch (36.65 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings