-221 BLACK EPDM 70D NSF O-RING

This o-ring is supplied in AS568-221 black EPDM (EPR) 70 Shore A supplied with an inside diameter of 1.421 in (36.09 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.699 in (43.15 mm), catalogued under part number E70NSF221. It remains the most cost-effective sealing element available for pressurized assemblies.

The material holds up against ketones, water and steam, and phosphate ester hydraulic fluids. That behavior comes from the compound itself: EPDM (EPR) delivers outstanding weather, ozone and sunlight resistance, very good flexibility at low temperature. Rated temperature range runs from -65°F (-53.9°C) to 300°F (148.9°C) in continuous service. It should not be specified for service in petroleum oils and fuels or aromatic hydrocarbons.

The compound meets FDA requirements for food contact and carries NSF listing. It sees regular use in potable water applications, water and steam systems, and outdoor equipment.

E70NSF221 ships individually. Unit weight is approximately 1.41 g and nominal inside diameter is listed as 1 7/16 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.