Rubber seals vs metal seals: Which is better for sealing hydraulic systems?

In industrial and mechanical equipment, the sealing performance of the hydraulic system is crucial to the reliable operation of the equipment. Choosing the right seal has an important impact on the efficiency and life of the hydraulic system. This article will compare the characteristics and advantages and disadvantages of rubber seals and metal seals in sealed hydraulic systems to help you make a more informed choice.

Advantages of rubber seals in hydraulic systems

Good sealing performance: Rubber seals can effectively prevent the leakage of liquid media, maintain the sealing performance of the system, and are suitable for sealing needs of low to medium pressures.

Elasticity and adaptability: Rubber materials have good elasticity and softness, can adapt to the slight unevenness of the shaft surface, improve the sealing effect, and are particularly suitable for dynamic sealing.

Cost-effectiveness: Compared with metal seals, rubber seals have lower manufacturing costs, are easier to mass produce and replace, and are conducive to reducing equipment maintenance costs.

Vibration absorption and noise reduction: Rubber seals can effectively absorb vibration and impact, reduce noise during system operation, and improve operating comfort.

Advantages of metal seals in hydraulic systems

Resistant to high pressure and high temperature: Due to the hardness and strength of the material itself, metal seals can withstand high pressure and high temperature environments, maintain a stable sealing effect, and are suitable for high-pressure hydraulic systems.

Wear resistance and long life: Metal seals have excellent wear resistance and are not easily affected by mechanical wear. They can maintain the sealing effect for a long time and extend the service life of the equipment.

Chemical stability: For special liquid media or harsh working environments, metal seals can provide better chemical stability and corrosion resistance, and have wider adaptability.

How to choose a suitable seal?

According to the working environment and requirements: When selecting a seal, factors such as the working pressure, temperature range, medium type, and movement type (static or dynamic sealing) of the hydraulic system need to be considered.

Economic and maintenance cost: Consider the purchase cost, replacement cycle, and system maintenance cost of the seal, and choose a sealing solution that meets economic benefits.

In summary, rubber seals and metal seals each have their own unique advantages and applicable scenarios. Rubber seals are suitable for sealing requirements under low to medium pressure and general temperature range, while metal seals are suitable for sealing requirements under high pressure, high temperature, and special media environments. The selection of suitable sealing rings needs to be weighed and selected based on the specific technical requirements and application environment to ensure the reliable operation and long-term stability of the system.

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