What type of seals are typically used with petroleum-based hydraulic fluids?

The use of synthetic rubber seals with petroleum-based hydraulic fluids is preferred due to their compatibility with the chemical properties of such fluids. Synthetic rubber is designed to resist degradation and maintain flexibility in various temperature ranges, making it suitable for the demanding conditions often encountered in hydraulic systems.

These seals provide excellent sealing capabilities, ensuring they can withstand high pressures and prevent leaks in hydraulic circuits. Additionally, synthetic rubber has good resistance to the effects of oil and can retain its mechanical properties over time when exposed to petroleum-based substances, reducing the risk of seal failure.

Other types of seals, such as silicone or plastic seals, may not have the same level of resistance to petroleum products, potentially leading to swelling, hardening, or other forms of degradation. Metal seals, while durable, do not provide the same level of flexibility and adaptability as synthetic rubber, making them less suitable for general hydraulic applications. Therefore, synthetic rubber seals are the most reliable option for use with petroleum-based hydraulic fluids.