APG stocks the TSP031, an AS568-031 white PTFE (Teflon) 55 Shore D Back-Up Ring measuring an inside diameter of 1.739 in (44.17 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 1.879 in (47.73 mm). A back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.
As a material, PTFE (Teflon) delivers one of the lowest coefficients of friction of any solid and a very wide continuous service temperature range. This material stands up to oxidizing media, steam, and strong acids and bases. Published continuous service range is -65°F (-53.9°C) to 500°F (260°C).
Common environments for this compound include semiconductor fabrication, laboratory equipment, and food and beverage.
This item is sold individually under part number TSP031. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Description 2107-031 PTFE SPIRAL B/U FDA
Actual Cross Section 0.07 inch (1.78 mm)
Actual Inside Diameter 1.739 inch (44.17 mm)
Actual Outside Diameter 1.879 inch (47.73 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings