-407 RED SILICONE 70D O-RING

Ordered as S70MD407, this is an AS568-407 red Silicone 70 Shore A O-Ring with an inside diameter of 2.225 in (56.52 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 2.775 in (70.49 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint.

Expect good resistance to dry heat, weathering, and ozone and UV exposure. That behavior comes from the compound itself: Silicone is valued for very good compression set resistance across its range, physiological inertness and low toxicity. The material carries a published service range of -80°F (-62.2°C) to 450°F (232.2°C). It should not be specified for service in concentrated acids or hydrocarbon fuels and oils.

The compound is metal detectable for HACCP and foreign-body control programs. Typical settings include medical devices, sanitary process lines, and pharmaceutical manufacturing.

Reference part number S70MD407 when ordering; the item is sold individually. Nominal inside diameter is listed as 2 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.