Ordered as E2.5X31, this is a black EPDM (EPR) 70 Shore A O-Ring built to an inside diameter of 31 mm (1.22 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 36 mm (1.42 in). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.
It resists dilute acids and alkalis, ketones, and phosphate ester hydraulic fluids. EPDM (EPR) is widely chosen for strong performance in outdoor and exposed installations, excellent hot water and steam resistance. Published continuous service range is -65°F (-53.9°C) to 300°F (148.9°C). Applications involving petroleum oils and fuels or aromatic hydrocarbons call for a different compound.
Common environments for this compound include potable water applications, HVAC and refrigeration, and outdoor equipment.
Stocked as E2.5X31 and sold individually. 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.
Description 2.5MM CS X 31MM ID BLACK EPDM 70D
Actual Outside Diameter 36 mm (1.42 inch)
Actual Cross Section 2.5 mm (0.098 inch)
Actual Inside Diameter 31 mm (1.22 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity