O-ring Materials

1、SIL Silicone Rubber Sealing Ring
Exhibits excellent heat resistance, cold resistance, ozone resistance, and atmospheric aging resistance, along with good insulation properties. However, it has lower tensile strength than general rubber and lacks oil resistance. Suitable for household appliances such as water heaters, irons, microwave ovens, and contact products like kettles and water dispensers. Not recommended for most concentrated solvents, oils, strong acids, and sodium hydroxide. Typical service temperature: -55 to 250°C.

2、VITON Fluororubber Sealing Ring
Offers better high-temperature resistance than silicone rubber, with excellent weather resistance, ozone resistance, and chemical resistance, but poor cold resistance. Resistant to most oils and solvents, especially acids, aliphatic hydrocarbons, aromatic hydrocarbons, and animal/vegetable oils. Suitable for diesel engines, fuel systems, and chemical plant sealing. Not recommended for ketones, low-molecular-weight esters, and nitrate-containing mixtures. Typical service temperature: -20 to 250°C.

3、FLS Fluorosilicone Rubber Sealing Ring
Combines advantages of fluororubber and silicone rubber, featuring excellent oil resistance, solvent resistance, fuel oil resistance, and wide temperature tolerance. Resists erosion from oxygen-containing compounds, aromatic solvents, and chlorinated solvents. Typical service temperature: -50 to 200°C.

4、EPDM Ethylene-Propylene-Diene Monomer (EPDM) Sealing Ring
Features good weather resistance, ozone resistance, water resistance, and chemical resistance. Suitable for alcohols, ketones, and high-temperature steam environments. Typical service temperature: -55 to 150°C.

5、CR Chloroprene Rubber Sealing Ring
Excels in sunlight and weather resistance. Resistant to refrigerants like dichlorodifluoromethane and ammonia, dilute acids, and silicone-based lubricants, but swells significantly in mineral oils with low aniline point. Prone to crystallization and hardening at low temperatures. Suitable for environments exposed to air, sunlight, ozone, and flame/chemical corrosion sealing. Not recommended for strong acids, nitrohydrocarbons, esters, chloroform, and ketones. Typical service temperature: -55 to 120°C.

6、ACM Acrylate Rubber Sealing Ring
Shows excellent oil resistance, high-temperature resistance, and weather resistance, but has slightly poorer mechanical strength, compression set, and water resistance. Commonly used in automotive transmission and power steering systems. Unsuitable for hot water, brake fluid, and phosphate esters. Typical service temperature: -25 to 170°C.

7、NR Natural Rubber Sealing Ring
Features good abrasion resistance, elasticity, tensile strength, and elongation. Prone to aging in air, sticky when heated, and swells/dissolves in mineral oil or gasoline. Resistant to alkalis but not strong acids. Suitable for liquids with hydroxide ions like automotive brake fluid and ethanol. Typical service temperature: -20 to 100°C.

8、PU Polyurethane Rubber Sealing Ring
Boasts excellent mechanical properties, with wear resistance and high-pressure resistance far superior to other rubbers. Also has good aging, ozone, and oil resistance but is prone to hydrolysis at high temperatures. Ideal for high-pressure and wear-resistant sealing. Typical service temperature: -45 to 90°C.

9、NBR Nitrile Butadiene Rubber Sealing Ring
Suitable for petroleum-based hydraulic oils, glycol-based hydraulic oils, diester lubricants, gasoline, water, silicone grease, and silicone oils. The most widely used and cost-effective rubber seal. Unsuitable for polar solvents such as ketones, ozone, nitrohydrocarbons, MEK, and chloroform. Typical service temperature: -40 to 120°C.

10、HNBR Hydrogenated Nitrile Butadiene Rubber Sealing Ring
Exhibits excellent corrosion, tear, and compression set resistance, along with good ozone, sunlight, and weather resistance. Offers better abrasion resistance than NBR. Suitable for washing machinery and automotive engine systems. Not recommended for alcohols, esters, or aromatic solutions. Typical service temperature: -40 to 150°C.

11、IIR Butyl Rubber Sealing Ring
Features excellent airtightness, heat resistance, sunlight resistance, ozone resistance, and insulation. Resistant to polar solvents like alcohols, ketones, and esters, and can be exposed to animal/vegetable oils or oxidants. Suitable for chemical-resistant or vacuum equipment. Not recommended for use with petroleum solvents, kerosene, or aromatics. Typical service temperature: -50 to 110°C.