Part number TSP040 is an AS568-040 white PTFE (Teflon) 55 Shore D Back-Up Ring with an inside diameter of 2.864 in (72.75 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.004 in (76.3 mm). A back-up ring bridges the extrusion gap so the primary seal holds its shape under load.
PTFE (Teflon) is specified here for non-stick, non-contaminating surface characteristics and one of the lowest coefficients of friction of any solid. It resists strong acids and bases, oxidizing media, and nearly all industrial chemicals. Rated temperature range runs from -65°F (-53.9°C) to 500°F (260°C) in continuous service. It should not be specified for service in molten alkali metals or service requiring elastic recovery.
Common environments for this compound include food and beverage, semiconductor fabrication, and aggressive-media pipelines.
Order part number TSP040, sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Description **2107-040 TFE SPIRAL B/U FDA
Actual Cross Section 0.07 inch (1.78 mm)
Actual Inside Diameter 2.864 inch (72.75 mm)
Actual Outside Diameter 3.004 inch (76.3 mm)
Measurement System Imperial
Product Category O-Rings - Backup Rings