Exploring The Material Selection of O-rings in Hydraulic Valves

The material of O-rings in hydraulic valves largely determines their applicability in various scenarios. Common materials for O-rings include:

1. 1)       Nitrile rubber (NBR): Resistant to oil, heat, and wear, suitable for automotive and industrial applications.

2. 2)       Fluoro rubber (FKM): Withstands high temperatures, chemicals, and fuels, commonly used in aerospace and industrial applications.

3. 3)       Silicone rubber (VMQ): Heat-resistant, cold-resistant, and ozone-resistant, suitable for food and medical applications.

4. 4)       Ethylene-propylene rubber (EPDM): Weather-resistant, ozone-resistant, and chemical-resistant, used extensively in automotive and industrial applications.

5. 5)       Polyurethane (PU): Wear-resistant, tear-resistant, and impact-resistant, suitable for high-pressure and high-speed hydraulic and pneumatic applications.

6. 6)       Chloroprene rubber (CR): Oil-resistant, fuel-resistant, and chemical-resistant, with ozone and weather resistance.

7. 7)       Natural rubber (NR): With good elasticity, tensile strength, and tear resistance, suitable for low-temperature environments.

8. 8)       Hydrogenated nitrile rubber (HNBR): Resistant to low and high temperatures, with excellent mechanical properties.

Additionally, there are other materials such as butadiene rubber, styrene-butadiene rubber, and butyl rubber. Each material has its own advantages and disadvantages, suitable for different working environments and requirements.