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Tip: Materials Chart for Oil Seals

Some of the most common materials used for oil seals are nitrile, highly saturated nitrile, Viton®, FEP, silicone and polyacrylate.

 Materials & Temperature

 Applications

 Use With These Fluids

Simriz®
-10 C to +305 C Compound Specific
Simriz® oil seals are molded of an elastomer that has the broadest chemical resistance of any elastomeric material. They combine all the resilience and sealing force of an elastomer with a chemical resistance approaching that of FEP. most chemicals Aflas®
-10 C to +204 C Compound Specific
Aflas® oil seals are made from a unique fluoroelastomer that is resistant to petroleum oils, steam, hydrogen sulfide and amine corrosion inhibitors. petroleum oils, H2S, steam Carboxilated Nitrile
-54°C to 135°C Nitrile oil seals are made from a compound that tolerates low temperatures and has excellent abrasion resistance. petroleum oils, water FKM Fluorocarbon
-40 C to +204 C Compound Specific FKM Fluorocarbon oil seals feature excellent resistance to petroleum products and solvents. They have good high temperature and low compression set characteristics. They are suited for use with wide chemical exposure situations and for hard vacuum service. petroleum oils, gasoline, transmission fluid Fluorosilicone
-56°C to 204°C A fluorosilicone oil seal combines the good high and low temperature stability of silicone with the fuel, oil, and solvent resistance of fluorocarbon. This oil seal is resistant to petroleum oils and gasoline. petroleum oils, gasoline Highly Saturated Nitrile (HSN, HNBR)
-26°C to 160°C Oil seals made from highly saturated nitrile have excellent resistance to petroleum oils and sour gas. Because of the extended temperature range of highly saturated nitrile, it is becoming a preferred compound in the oil patch. petroleum oils, H2S, CO2 Nitrile (Buna-N)
-40°C to 135°C
Nitrile (Low-Temp)
-65°C to 120°C Nitrile is presently the seal industry's most widely used elastomer. Nitrile oil seals combine excellent resistance to petroleum based oils and fuels, silicone greases, hydraulic fluids, water and alcohols. Nitrile has a good balance of working properties such as low compression set, high tensile strength, high abrasion resistance, combined with a low cost. petroleum oils,
water, hydraulic oils Polyurethane
-40°C to 105°C Polyurethane is an excellent material with high abrasion resistance characteristics and high tensile strength. Polyurethane oil seals are used in high pressure hydraulic systems where highly stressed parts are subject to wear. These seals are resistant to petroleum oils and hydraulic oils. petroleum oils,
hydraulic oils FEP
-20°C to 204°C FEP is a tough, chemically inert polymer possessing an incredible working range. Oil seals from this material are for static and slow intermittent dynamic situations. FEP is hampered by a poor memory at low temperature. most chemicals Polyacrylate
-20°C to 170°C Polyacrylate has better heat resistance than Nitrile. It works well in high surface speed oil seals. petroleum oils, Freon Silicone
-60°C to 200°C Silicone oil seals have a high lubricant absorbency which minimizes friction and wear. petroleum oils, some acids

Data is presented for use only as a general guide and should not be the basis for design decisions. If you are designing oil seals and need help choosing the right material, just give us a call.

Next tip: Oil Seal Basics.

 

 

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In oil and gas applications, sealing devices are critical to prevent unwanted dirt, water, dust or other debris from contaminating products. When it comes to finding the right seal for these applications, material selection is key. Every rubber material has unique benefits that must align with the requirements in oil applications, such as chemical compatibility, temperature and pressure ranges.

Apple Rubber recommends the following rubber materials for oil applications. For more information about each material, visit our Material Selection Guide. 

Nitrile (Buna-N)

Nitrile is the sealing industries most economical and widely used material. It&#;s most commonly used in a wide range of oil applications, as well as automotive, marine, aircraft fuel and military applications. The most notable benefits of Nitrile for oil seals include: 

• Resistance to petroleum-based oil and fuel, silicone greases, hydraulic fluid and water

• Low compression set

• High tensile strength

• Excellent abrasion resistance

• Standard temperatures range from -40°F to 257°F

Fluorocarbon (Viton®)

Viton® is a synthetic rubber typically used in o-rings, gaskets, lip seals and other molded sealing devices for oil applications. High fluorine grades of Viton® offer excellent resistance to swell in high octane and oxygenated fuel blends, making it the ideal sealing material for ethanol/methanol blended gasoline. Other important benefits of Viton® include: 

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• Standard temperatures range from -13°F to 446°F

• High temperature resistance

• Chemical resistance to transmission fluid, gasoline and petroleum oils

Silicone

Silicone offers one of the widest working temperature ranges of all elastomers. Silicone is most known for its flexibility and low compression set characteristics, making it an optimal choice for o-rings and other molded seals. The most important benefits of silicone in oil applications include: 

• Standard temperatures range from -85°F to 400°F

• Phenyl (PVMQ) based silicones can perform to -148°F

• Resistant to ozone, sun and weather conditions

• Flexibility allows Silicone to be a great option for electrical insulation

Fluorosilicone

Fluorosilicone combines the temperature stability of silicone with resistance to fuels, oils and solvents. Fluorosilicone is most often used in aerospace fuel applications and automotive fuel emission control, however it is becoming increasingly popular in a wider range of oil applications. Some of the unique characteristics of fluorosilicone include: 

• Standard temperatures range from 75°F to 400°F.

• Excellent high temperature resistance

• Offers good compression set properties

• Withstands exposure to sun, air and ozone

• Resistant to chlorinated and aromatic hydrocarbons

 

Want to talk more about sealing materials for oil applications?

Contact an engineer today. 

The Best Sealing Materials for Oil Applications

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