568-390 URETHANE 70 DURO ORINGS

Ordered as U70390, this is an AS568-390 clear Polyurethane (AU/EU) 70 Shore A O-Ring measuring an inside diameter of 20.953 in (532.21 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 21.373 in (542.87 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Polyurethane (AU/EU) delivers long wear life in dynamic reciprocating service and exceptional abrasion resistance. The compound resists petroleum oils, abrasion and wear, and impact and shock loading. Service temperature is rated from -65°F (-53.9°C) through 200°F (93.3°C). Applications involving prolonged humidity at elevated temperature or hot water and steam call for a different compound.

You will find this material specified across off-highway equipment, mining and heavy equipment, and construction machinery.

Order part number U70390, sold individually. Nominal inside diameter is listed as 21 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.