EPDM O-rings for the tank lids are the original material designed for use in the food & beverage industry. We recommend this material in certain instances where Viton® may not hold up.
This material is defined as: EPDM rubber (ethylene propylene diene Monomer (M-class) rubber), a type of synthetic rubber, is an elastomer which is characterized by wide range of applications.The E refers to Ethylene, P to Propylene, D to diene and M refers to its classification in ASTM standard D-1418.
ADVANTAGES: Excellent resistance to water, steam and polar solvents, as well as ozone and sunlight. Also resistant to alcohols, glycol engine coolants and SKY-DROL (phosphate ester hydraulic fluid).
LIMITATIONS: Avoid non-polar solvents, petroleum oils, and aromatic fuels.