E70231 is an AS568-231 black EPDM (EPR) 70 Shore A O-Ring supplied with an inside diameter of 2.609 in (66.27 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.887 in (73.33 mm). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
It resists ozone, UV and weathering, brake fluid, and dilute acids and alkalis. That behavior comes from the compound itself: EPDM (EPR) delivers excellent hot water and steam resistance, good electrical insulating characteristics. Rated temperature range runs from -65°F (-53.9°C) to 300°F (148.9°C) in continuous service. Applications involving mineral oil-based lubricants or aromatic hydrocarbons call for a different compound.
Common environments for this compound include solar and roofing assemblies, HVAC and refrigeration, and water and steam systems.
Order part number E70231, sold individually. Unit weight is approximately 2.55 g. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Description -231 BLACK EPDM 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 2.609 inch (66.27 mm)
Actual Outside Diameter 2.887 inch (73.33 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity