Green HNBR O-Rings

About Green HNBR O-Rings 

HNBR O-rings, also known as Highly Saturated Nitrile (HSN), are made of a synthetic polymer that is obtained by saturating the double bonds in nitrile butadiene segments with hydrogen. This special hydrogenation process reduces many double bonds in the main chains of NBR polymers. This process results in the superior heat, ozone, chemical resistance, and mechanical characteristics of HNBR over standard Nitrile. HNBR o-rings are available in 70 durometers, 80 durometers, and 90 durometers.

Advantages of Green HNBR O-Rings

Green Hydrogenated Nitrile Butadiene Rubber (HNBR) O-rings offer several advantages over traditional O-ring materials. Here are some of the key advantages:

■ Chemical Resistance: Green HNBR O-rings exhibit excellent resistance to a wide range of chemicals, oils, fuels, and hydraulic fluids. They can withstand exposure to aggressive fluids and maintain their integrity, making them suitable for use in various industries, including automotive, oil and gas, and chemical processing.

■ Temperature Resistance: HNBR O-rings can withstand a wide temperature range, from extremely low temperatures to high temperatures. They have excellent heat resistance, typically functioning well in temperatures ranging from -40°C to 150°C (-40°F to 302°F), making them suitable for demanding applications.

■ Compression Set Resistance: Green HNBR O-ring have low compression set properties, meaning they can maintain their shape and sealing performance over extended periods of compression or deformation. This property ensures reliable and long-lasting sealing, even under high-pressure conditions.

■ Wear and Abrasion Resistance: HNBR O-ring is highly resistant to wear and abrasion, making them suitable for dynamic sealing applications. They can withstand repeated movement and friction without significant degradation, ensuring a longer service life.

■ Resistance to Swelling: Some rubber materials tend to swell when exposed to certain fluids or chemicals, which can lead to compromised sealing performance. Green HNBR O-rings exhibit minimal swelling, even when in contact with aggressive fluids, making them suitable for applications where chemical compatibility is crucial.

■ Low Gas Permeability: HNBR Rubber O-rings have low gas permeability, meaning they offer effective sealing against gas leakage. This property is particularly important in applications where gas tightness is critical, such as in automotive fuel systems or refrigeration systems.

■ Environmental Benefits: “Green” HNBR refers to a formulation that is more environmentally friendly than traditional HNBR compounds. It typically exhibits reduced levels of harmful additives and has a lower impact on the environment during production and disposal.

HNBR Rubber Benefits

HNBR rubber components fulfill the gap between Nitrile (NBR) as well as Viton (FKM) simply because of their great resistance to motor oil, ATF, oxidized fuels, and also lubricating oils when high temp conditions need higher tensile strength.

The vehicle market is the largest client of HNBR. They use it for many dynamic and static seals, hoses, and belts.

For over 40 years, we have served the increasing as well as changing demands of industry. Our professional crew can suggest and provide the right product for your program.

At LINDE, our commitment to the highest standard of customer service will help you solve your sealing challenges.

Application and Industries of HNBR O-rings

Green HNBR O-rings for Gasoline have excellent resistance to most commonly encountered automotive fluids like engine oil, coolant as well as fuel, together with quite a few commercial chemical compounds. HNBR has been widely used in motor vehicles, industrial, and some performance-demanding purposes because of its exceptional properties and bigger temp rating.

1. Automotive industry: HNBR rubber O-ring is often used in sealing applications in the automotive industry. They can be used to seal critical components such as engine systems, fuel systems, braking systems, air conditioning systems and cooling systems because of their excellent resistance to oil, heat and chemicals.

2. Oil and natural gas industry: HNBR rubber O-rings play an important role in the oil and natural gas industry. They can be used in applications such as well equipment, pipe connections, valves and seals because of their excellent resistance to chemicals and high temperatures.

3. Chemical Industry: Due to the excellent chemical resistance properties of rubber O-rings, they are often used in sealing applications in the chemical industry. They can be used to seal equipment such as tanks, pipes, pumps and valves to ensure resistance to corrosion and chemicals.

4. Pharmaceutical and food industry: HNBR rubber O-rings are also used in the pharmaceutical and food industry. They can be used in applications such as pharmaceutical production equipment, food handling equipment and sealed containers because they meet hygienic requirements and are resistant to chemicals and high temperatures.

5. Compressor and pump industry: HNBR rubber O-rings are widely used in the compressor and pump fields. They can be used to seal equipment such as air compressors, liquid pumps, vacuum pumps and gas compressors because they are resistant to wear, high temperatures and chemicals.

These are just some examples of applications for HNBR O-rings, in fact they are widely used in many other industries and applications as their excellent performance makes them ideal for many sealing needs.

Standard HNBR O-Ring Material Applications

• HNBRs are often internally lubricated to improve ease of installation or reduce friction for dynamic applications.
• HNBRs can be formulated with only “white list” ingredients as specified in 21.CFR 177.2600 for use in applications where the elastomer will be in contact with food or beverages.
• HNBRs are usually used in automotive air conditioning system where R134a refrigerant gas or new refrigerant for environment protection like R401a, R404a, R410a, R507 and R744 is used.
• HNBRs are also used in automotive shaft systems because of their excellent abrasion resistance.
• In deeper oil wells, it requires material resistance to heat, crude oil, hydrogen sulfide, steam, and explosive decompression, etc. Special compounds of HNBR can be available for this application.

Other HNBR Rubber Compounds

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