*2107-256 PTFE SPIRAL B/U FDA

Part number TSP256 is an AS568-256 white PTFE (Teflon) 55 Shore D Back-Up Ring supplied with an inside diameter of 5.734 in (145.64 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.012 in (152.7 mm). A back-up ring extends o-ring service life by supporting the seal against extrusion under high pressure.

PTFE (Teflon) is known for a very wide continuous service temperature range and non-stick, non-contaminating surface characteristics. This material stands up to nearly all industrial chemicals, solvents, and oxidizing media. The material carries a published service range of -65°F (-53.9°C) to 500°F (260°C). Applications involving elemental fluorine at temperature or molten alkali metals call for a different compound.

It sees regular use in aggressive-media pipelines, laboratory equipment, and food and beverage.

Reference part number TSP256 when ordering; the item is sold individually. Nominal inside diameter is listed as 5 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.