568-153 FKM 75 SQUARE CUT RINGS

The SV70153 is an AS568-153 black Viton® (FKM) 70 Shore A Square-Cut Ring built to an inside diameter of 3.487 in (88.57 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 3.693 in (93.8 mm). This square-cut ring seals with a broad flat contact band instead of the line contact of a round-section ring.

The compound resists aromatic hydrocarbons, petroleum oils and fuels, and aggressive chemicals. That behavior comes from the compound itself: Viton® (FKM) delivers 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). Exposure to hot water and steam or amines will shorten service life. The profile itself contributes a rectangular section that will not roll in the groove and simple lathe-cut manufacture at low tooling cost. 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 automotive fuel systems, chemical processing, and high-temperature process equipment.

Reference part number SV70153 when ordering; the item is sold individually. Review your operating media and conditions against this specification before installation.