APG stocks the E70284, an AS568-284 black EPDM (EPR) 70 Shore A O-Ring measuring an inside diameter of 17.955 in (456.06 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 18.233 in (463.12 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
EPDM (EPR) is specified here for outstanding weather, ozone and sunlight resistance, excellent hot water and steam resistance. This material stands up to dilute acids and alkalis, ketones, and water and steam. Continuous operating temperature is published at -65°F (-53.9°C) to 300°F (148.9°C). It should not be specified for service in aromatic hydrocarbons or mineral oil-based lubricants.
It sees regular use in solar and roofing assemblies, water and steam systems, and potable water applications.
E70284 ships individually. Unit weight is approximately 0.0156 g. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description -284 BLACK EPDM 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 17.955 inch (456.06 mm)
Actual Outside Diameter 18.233 inch (463.12 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity