EPDM o-rings (also known as EPR o-rings or Ethylene Propylene o-Rings) are made of EPDM rubber, and their most important feature is their excellent resistance to oxidation, ozone, and corrosion.
EPDM rubber is a terpolymer of ethylene, propylene, and non-conjugated dienes. Since EPDM rubber belongs to the polyolefin (PO) family, it has excellent vulcanization characteristics. Among all rubbers, EPDM rubber has the lowest specific gravity and can absorb a large number of fillers and oils without much impact on properties.
- Material: EPDM / EPR / Ethylene Propylene Diene Monomer
- Temperature Range / Rating: -50 °C (-58 °F) to 150°C (302 °F)
- Low Operating Temperature Limit: -50 °C (-58 °F)
- High Operating Temperature Limit: 150°C (302 °F)
- Durometer Hardness Range: Shore A 40-90
- Standard Durometer Hardness: Shore A 70
- Color: Black (standard), custom color is available
- Outline: Round, square, rectangular, custom
- Cross Section Shape: Round
- Cross Section Width (CS): 0.5 to 20 mm (0.020 to 0.787 inch)
- Inside Diameter (ID): 0.7 to 2965 mm (0.028 to 116.732 inch)
- Standard Size: AS 568, BS 1806, ISO 3601, DIN 3771, JIS B 2401
- Shelf Life: 5 – 10 years
- Price Level: Common
EPDM o-rings have excellent weather resistance, aging resistance, ozone resistance, and chemical stability, and they are resistant to Freon and a variety of refrigerants. EPDM o-ring seals also have good compatibility with glycol-based brake fluid.
Chemical Resistance Properties
Commonly used in high-temperature water vapor environment seals, sanitary equipment seals or parts, as well as refrigerators and refrigeration equipment seals, etc.