-448 BLACK FKM 70D SQUARE RING

Ordered as SV70448, this is an AS568-448 black Viton® (FKM) 70 Shore A Square-Cut Ring built to an inside diameter of 9.475 in (240.67 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 10.025 in (254.64 mm). The square-cut ring seals with a broad flat contact band instead of the line contact of a round-section ring.

Expect good resistance to petroleum oils and fuels, aromatic hydrocarbons, and many acids. That behavior comes from the compound itself: Viton® (FKM) is widely chosen for the industry benchmark where nitrile reaches its thermal limit and outstanding high-temperature capability. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). Applications involving low-molecular-weight organic acids or amines call for a different compound. The profile itself contributes simple lathe-cut manufacture at low tooling cost and a flat contact band that spreads sealing load across a wider area. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

You will find this material specified across semiconductor equipment, oil and gas, and chemical processing.

Stocked as SV70448 and sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.