TST034SO is an AS568-034 white PTFE (Teflon) 55 Shore D Back-Up Ring supplied with an inside diameter of 2.114 in (53.7 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 2.254 in (57.25 mm). In service, this back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.
PTFE (Teflon) is specified here for near-universal chemical inertness and excellent dielectric properties. It resists solvents, strong acids and bases, and nearly all industrial chemicals. Continuous operating temperature is published at -65°F (-53.9°C) to 500°F (260°C). It is not the right choice where molten alkali metals or service requiring elastic recovery are present.
It sees regular use in pharmaceutical and biotech, laboratory equipment, and food and beverage.
TST034SO ships individually. Nominal inside diameter is listed as 2 1/8 inch. Check the compound against your process media, pressure and temperature before committing to a design.
Description 34 PTFE SOLID BACKUP RING FDA
Actual Cross Section 0.07 inch (1.78 mm)
Actual Inside Diameter 2.114 inch (53.7 mm)
Actual Outside Diameter 2.254 inch (57.25 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings