568-337 FKM 75 SQUARE CUT RINGS

APG stocks the SV70337, an AS568-337 black Viton® (FKM) 70 Shore A Square-Cut Ring built to an inside diameter of 2.975 in (75.57 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.395 in (86.23 mm). A square-cut ring presents a flat rectangular section that cannot roll or twist in its groove, making it a dependable static seal.

The material holds up against many acids, aggressive chemicals, and aromatic hydrocarbons. That behavior comes from the compound itself: Viton® (FKM) delivers long service life in hot, chemically aggressive environments, excellent resistance to compression set and permeation. Rated temperature range runs from -15°F (-26.1°C) to 400°F (204.4°C) in continuous service. Exposure to amines or low-molecular-weight organic acids will shorten service life. 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.

Common environments for this compound include chemical processing, automotive fuel systems, and oil and gas.

Reference part number SV70337 when ordering; the item is sold individually. Nominal inside diameter is listed as 3 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.