The common sealing ring generally has two kinds of silicone and rubber, the sealing ring is a ring seal, and its cross-section is circular, so it is named “O-ring”. Depending on the application’s requirements, they can be constructed with unique cross sections, such as T-shaped, L-shaped, etc. The primary function of the sealing ring is to fill the groove or groove between the two parts to achieve a static or dynamic sealing effect.

Silicone sealing ring

Property:

High temperature and low temperature resistance, good weather resistance, ozone resistance, and UV resistance.Good electrical insulation performance, with low moisture absorption, non-toxic and tasteless.

Application：

Silicone O-rings are mainly used in high temperature sealing, mechanical equipment, electronic and electrical equipment, and aerospace industry, because of its non-toxic and tasteless and high temperature resistance characteristics are also used in the food and pharmaceutical industry, silicone material is also biocompatible, so silicone O-rings are also used in medical equipment.

Rubber seal ring

Rubber seals are made of different rubber materials according to different application requirements.  The following are some common rubber seal materials.

Nitrile seal ring

Property:

It has excellent oil resistance and can be used in an oily environment for a long time without degradation. High temperature resistance, NBR seals can be used continuously at high temperatures up to 120℃ (248 ℉), and can even reach 150℃ (302℉) in hot oil environments. Good mechanical properties, high wear resistance.

Applications:

In the automotive industry, the excellent oil resistance of nitrile seals makes them ideal for fuel and oil systems. Used in the oil and gas industry for pumps, valves, drilling equipment, etc., nitrile seals are also found in the aerospace industry, whose resistance to aircraft fuels, lubricants, etc., ensures a tight seal.

Neoprene seal ring

Property:

Good flame retardant, solvent resistance and oil resistance, excellent acid and alkali resistance, excellent weather aging resistance, ozone resistance, crystallization, and good water resistance.

Applications:

Neoprene’s sealing properties and resistance to oils, fuels, and chemicals make it suitable for use in the automotive, manufacturing, and engineering industries, as well as as a sealing ring for aircraft engines. Neoprene is resistant to salt water, weathering, and ultraviolet radiation, making it a popular choice for Marine applications. It is used for sealing of Marine components.

EPDM seal ring

Property:

Excellent aging resistance, is the best existing general rubber, excellent electrical insulation performance, more than butyl rubber, good heat resistance, generally can be used at 150℃ (302 ℉) for a long time, has good low temperature elasticity, and has good electrical insulation.

Applications:

EPDM rubber seals are commonly used in automotive manufacturing, medical equipment, household appliances, water and wastewater systems, air conditioning systems, and places that are exposed to weather conditions for a long time.

Fluorine seal ring

Property:

Fluorine rubber plate has excellent high temperature stability and can be comparable to silicone, but better than other rubber. High corrosion resistance, better than other rubbers in terms of stability against organic liquids, concentrated acids, high concentrations of hydrogen peroxide, and other strong oxidants. It has good weather resistance, a stable effect on ultraviolet rays, ozone, and climate, and excellent anti-aging performance. Durability and stability in a vacuum environment are also excellent.

Applications:

Due to its excellent performance, FKM O-rings are commonly used in automotive parts, equipment sealing, aerospace, the oil and gas industry, and semiconductor manufacturing.

In short, the choice between silicone and rubber seals ultimately depends on the specific needs and requirements of your application. Both of these materials have their own unique advantages for different industries. A suitable sealing ring is not just a round piece of material; It is the cornerstone of efficiency, safety, and innovation in countless industries around the world.

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