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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.

 

Additional resources:
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Ultimate Guide to Hydraulic Hose Fittings

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Which is the Best Material for Your Oil Seal?

An oil seal is basically a simple device, which is used to stop dirt, dust, water, and other contaminants from entering the shaft equipment. It is also known by other names like elastomeric lip seal, lip seal, shaft seal, or rotary shaft seal. The seal, while doing its job, helps retain the lubrication of a rotary shaft equipment. These seals are mainly used to protect the bearings used in a rotating shaft.

Materials Used to Make Oil Seals:

Oil seals can be made from a vast range of materials depending upon the application. Some common materials used to manufacture oil seals include:

1. Silicone: The widest range of operating temperature range is provided by silicone compounds. They offer an amazing temperature range from -90°F to 340°F. Nonetheless, in dry running conditions, these compounds do not perform well. It is always advisable to avoid the usage of silicone compounds with oxidized oils and EP (Extreme Pressure) compounds.
2. Viton®: Viton® compounds are said to offer the widest operating temperature range varying from 40°F to 400°F. These are considered as the premium materials for the lip seals. In addition to this, these compounds are highly resistant to chemicals and abrasion. These qualities help Viton® deliver better good performance. Unlike silicone compounds, Viton® performs well in dry running applications.
3. Nitrile Buna-N: Most companies consider Nitrile Buna-N 70 durometer compound to be the perfect material for oil seals. The compound has several benefits, which makes it the first choice of material in a wide range of applications. Oils seals that are made from this material have a wide operating temperature range from -65°F to 250°F. In addition to this, this material is compatible to work with water, as well as common mineral oil and greases.

Above mentioned are some materials used for manufacturing oil seals. Each material has its own set of pros and cons. Therefore, selection of materials should be made on the basis of the application. There are quite a variety of materials to choose from. If you find it tricky to select the right material for oil seals, you can always ask an expert. SSP Manufacturing, Inc. is one such expert in manufacturing oil seals in the USA. Please contact us by : +1-888-238- or with any questions.

The company is the world’s best oil seal custom supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

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