-276 BLACK FKM 70D SQUARE RING

Part number SV70276 is an AS568-276 black Viton® (FKM) 70 Shore A Square-Cut Ring supplied with an inside diameter of 10.984 in (278.99 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 11.262 in (286.05 mm). A square-cut ring resists the spiral failure that affects round rings on long reciprocating strokes.

It resists many acids, aggressive chemicals, and aromatic hydrocarbons. That behavior comes from the compound itself: Viton® (FKM) is valued for very low compression set at elevated temperature, excellent resistance to compression set and permeation. The material carries a published service range of -15°F (-26.1°C) to 400°F (204.4°C). It is not the right choice where low-molecular-weight organic acids or hot water and steam are present. The profile itself contributes greater resistance to extrusion than a round section of the same size and a rectangular section that will not roll in the groove. 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 high-temperature process equipment, aerospace, and semiconductor equipment.

SV70276 ships individually. Nominal inside diameter is listed as 11 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.