EPDM (Ethylene Propylene Diene Monomer)
EPDM is frequently utilized in applications involving brake fluids, AS1241 phosphate ester fluids, glycol-based fluids, and hot water. EPDM materials give good heat, ozone, and aging resistance. They also have high levels of flexibility, good low temperature performance, and good insulating qualities. EPDM materials operate at temperatures ranging from -65°F (-54°C) to +302°F (+150°C). For short periods of time, they can withstand up to +347°F (+175°C). Newer lower temperature EPDM polymers can seal at temperatures as low as -75°F (-60°C).
Many CDI seal designs are composite seals with an elastomer element as an integral part of the seal. For this reason, it is crucial to control seal design parameters such as elastomer expansion, molding shrinkage, compression set, fluid compatibility, and tolerances. Through extensive and rigorous testing in our test laboratory, we ensure that our compounds are manufactured to our specifications. Several of our compounds are pending QPL approval as part of the NADCAP/PRI program.
The selection of an elastomer material for a hydraulic fluid is crucial because elastomers are more fluid-sensitive than other materials. If the incorrect material is selected, chemical reactions and physical behavior can be extremely harmful or catastrophic.
Even though industry standards ensure compatibility, the number and type of additives used in hydraulic oils can result in different behaviors. It may be necessary to conduct fluid exposure testing at elevated temperatures to verify the performance for critical applications.
