APG stocks the E70NSF438, an AS568-438 black EPDM (EPR) 70 Shore A O-Ring supplied with an inside diameter of 6.225 in (158.12 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.775 in (172.09 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.
It resists dilute acids and alkalis, ozone, UV and weathering, and phosphate ester hydraulic fluids. EPDM (EPR) delivers excellent hot water and steam resistance, good electrical insulating characteristics. Continuous operating temperature is published at -65°F (-53.9°C) to 300°F (148.9°C). Verify compatibility before use with petroleum oils and fuels or aromatic hydrocarbons.
This o-ring meets FDA requirements for food contact and carries NSF listing. Typical settings include water and steam systems, HVAC and refrigeration, and brake and phosphate ester systems.
Order part number E70NSF438, sold individually. Unit weight is approximately 22.65 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description -438 BLACK EPDM 70D NSF O-RING
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 6.225 inch (158.12 mm)
Actual Outside Diameter 6.775 inch (172.09 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable