Part number TSP254 is an AS568-254 white PTFE (Teflon) 55 Shore D Back-Up Ring built to an inside diameter of 5.484 in (139.29 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.762 in (146.35 mm). A back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.
Expect good resistance to nearly all industrial chemicals, solvents, and oxidizing media. PTFE (Teflon) is valued for non-stick, non-contaminating surface characteristics and a very wide continuous service temperature range. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C).
You will find this material specified across pharmaceutical and biotech, semiconductor fabrication, and laboratory equipment.
Order part number TSP254, sold individually. 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 **2107-254 PTFE SPIRAL B/U FDA
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 5.484 inch (139.29 mm)
Actual Outside Diameter 5.762 inch (146.35 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings