-228 BLACK FKM 70D SQUARE RING

The SV70228 is an AS568-228 black Viton® (FKM) 70 Shore A Square-Cut Ring with an inside diameter of 2.234 in (56.74 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.512 in (63.8 mm). This square-cut ring offers greater contact area against the gland wall than an equivalent o-ring.

It resists aggressive chemicals, many acids, and engine and transmission fluids. That behavior comes from the compound itself: Viton® (FKM) is known for the industry benchmark where nitrile reaches its thermal limit and very low compression set at elevated temperature. Continuous operating temperature is published at -15°F (-26.1°C) to 400°F (204.4°C). It should not be specified for service in low-molecular-weight organic acids or amines. The profile itself contributes a flat contact band that spreads sealing load across a wider area and greater resistance to extrusion than a round section of the same size. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

Maintenance and OEM teams specify it across aerospace, chemical processing, and semiconductor equipment.

Stocked as SV70228 and sold individually. Nominal inside diameter is listed as 2 1/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.