Fluororubber O-ring

Fluororubber O-ring is a circular sealing component made of fluororubber as raw material, which is a reliable sealing solution for businesses under harsh working conditions such as high temperature, strong corrosion, and oil resistance.

1、 Core Performance (FKM)

Temperature resistance range

Standard: -20 ℃~+200 ℃ (long-term)

Modified/ternary fluorine adhesive: -40 ℃~+250 ℃ (long-term)

Short term peak: up to 300 ℃

Chemical resistance (advantage of craftsmanship)

Tolerance: Mineral oil, synthetic oil, fuel, diesel, gasoline, hydraulic oil

Tolerance: dilute acid, dilute alkali, most organic (based on actual reports) solvents (aromatic hydrocarbons, fatty hydrocarbons), ozone, ultraviolet radiation

Not resistant to: low molecular weight ketones (acetone), esters, ethers, strong oxidants, fluorinated solvents, steam

mechanical properties

Hardness: 70~90 Shore A (commonly 70/80/90 degrees)

Tensile strength: 10-20 MPa

Long term compression results in minimal deformation, aging resistance, and a long lifespan

shortcoming

Low temperature elasticity difference (brittle below -20 ℃ standard)

Price higher than Nitrile (NBR) and Silicone (VMQ)

2、 Material type

Binary Fluorine Adhesive (F26/Viton A)

Universal type, temperature resistance of 200 ℃, good cost-effectiveness

Ternary Fluorine Adhesive (F246/Viton B)

Resistant to low temperatures up to -40 ℃, with good chemical resistance

Perfluoroether (FFKM/Kalrez)

Excellent temperature resistance of 320 ℃+, resistance to almost all media, high price

3、 Specification standards

National standard (GB/T 3452.1), American standard (AS568A), Japanese standard (JIS B 2401)

Inner diameter x wire diameter (ID x CS)

Common wire diameters: 1.8, 2.4, 3.5, 5.3, 7.0 mm

Color: Common brown, black

4、 Typical applications

Automobiles: engine, turbocharger, fuel system, gearbox

Petrochemical industry: pumps, valves, flanges, reactors, pipeline sealing

Hydraulic and Pneumatic: High Temperature and High Pressure Oil Cylinder, Hydraulic System

Aerospace, Machinery, Semiconductors, Industrial Furnaces

5、 Key selection points

Temperature: below -20 ℃, choose ternary fluorine glue or silicone gel

Medium: Avoid ketones, esters, ethers, fluorocarbons, and high-temperature vapors

Pressure: Choose higher hardness (85-90 Shore A) for high pressure (>10MPa)