Material Chart for Oil Seals

Oil Seals are also known as a Rotary Shaft Seal, shaft seal, lip seal, elastomeric lip seal or any variation of these. It is a simple device for excluding dust, dirt, water or any other contaminant whilst retaining lubricant in rotary shaft equipment. Generally, it has been developed as a means of protecting the bearings of rotating shafts.

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Below is the chart for Oil Seal Materials selection:

Temperature range: between -10°C and +205°C (intermittent/compound specific between -20°C and +250°C)

Applications: Aflas® are created from an exceptional Fluoroelastomer (FKM), which is resistant to steam, petroleum oils, amine corrosion inhibitors, and hydrogen sulphide.

Resistant to: Steam, Petroleum Oils, H2S

Temperature range: between -55°C and +135°C

Applications: Carboxylated Nitrile (XNBR) oil seals are created from a low-temperature tolerant compound, also has an excellent abrasion resistance.

Resistant to: Water, Petroleum Oils

Temperature range: between -20°C and +205°C or between -45°C and +230°C (intermittent/compound-specific)

Applications: FKM Fluorocarbon oil seals distinguish a great resistance to solvents and petroleum oils. They are, therefore, great for high-temperature installations and have present low compression set attributes. Additionally, they are adapted for use with large chemical exposure and hard vacuum applications.

Resistant to: Transmission Fluids, Gasoline, Petroleum Oils

Temperature range: between -55°C and +205°C (dependant on core material)

Applications: FEP oil seals are an excellent option for static and slow intermittent dynamic applications. FEP is interfered by a poor memory at low temperatures. FEP is, however, very tough, a chemically inert polymer that has a spectacular working scope.

Resistant to: Majority of chemicals

Temperature range: between -60°C and +180°C (intermittent/compound specific up to +200°C)

Applications: Fluorosilicone (FVMQ) oil seals incorporate a good low and high-temperature persistence of Silicone (VMQ) and Fluorocarbon&#;s resistance to solvents, oil, and fuel. It also presents great resistance to gasoline and petroleum oils.

Resistant to: Gasoline, Petroleum Oils

Temperature range: between -30°C and +170°C (intermittent/compound specific up to +190°C)

Applications: Oil seals produced from Hydrogenated Nitrile (HNBR) present superior sour gas and petroleum oils resistance. Due to an extensive temperature range of Highly Saturated Nitrile, it happens to be most preferable material in Oil Industries.

Resistant to: H2S, CO2, Petroleum Oils

Temperature range: Buna-N between -40°C and +135°C (intermittent up to +150°C); Low-Temp between -65°C and +120°C

Applications: Nitrile (NBR) is currently the most extensively used elastomer in the Fluid Seal Industry. Furthermore, Nitrile oil seals incorporate exquisite reluctance to hydraulic oils, water, silicone greases, petroleum-based oils and fluids, and alcohols. Nitrile presents great stability of working attributes such as high tensile strength, high abrasion resistance, and low compression set combined with low cost.

Resistant to: Water, Petroleum Oils & Fluids, Hydraulic Oils

Temperature range: between -20°C and +150°C

Applications: Polyacrylate oil seals have superior high-temperature resistance than that of Nitrile. Therefore, they are ideal for high surface speed oil applications.

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Resistant to: Freon, Petroleum Oils

Temperature range: between -15°C and +85°C (intermittent/compound specific between -50°C and +100°C)

Applications: Polyurethane oil seals are used in high-stress hydraulic applications, in which highly pressured compounds are exposed to wear. Polyurethane, however,  presents a great high abrasion resistance qualities and high tensile strength.

Resistant to: Hydraulic Oils, Petroleum Oils

Temperature range: between -60°C and 250°C (special grades up to +300°C)

Applications: Silicone (VMQ) oil seals present a high lubricant absorbency. It minimizes wear and friction in certain applications.

Resistant to: Number of Acids, Petroleum Oils

Temperature range: between -50°C and +327°C (intermittent up to +350°C; compound specific)

Applications: Simriz® oil seals are created of an elastomer, which has the widest chemical resistance our of all elastomer materials. They incorporate all the elasticity and sealing strength of an elastomer and chemical resistance similar to that of FEP (Fluorinated Ethylene Propylene).

Resistant to: Majority of chemicals

The above information had been derived from numerous sources and the ratings are therefore intended as a guide only. Users must test under their own operating conditions to determine the suitability of any compound in a particular application and temperature.

M Barnwell Services is the UK&#;s largest independent stockist, manufacturer, and distributor of fluid sealing products and services. For more information about Barnwell O Rings click here, or to download a brochure click here.
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E & OE. M Barnwell Services endeavours to make sure all the content is correct. Information has been gained from manufacturing partners.

Oil-Seal-Materials

Materials and Oil-seal Compounds 

This page contains information about Oil-seal Materials.

Acrylate natural rubber (ACM)

Acrylate-natural rubber is its excellent heat and hot oil resistance. ACM is resistant to motor oils with modern additives, gearbox oil, lubricants etc. In addition there is the high oxidation and ozone resistance of a saturated polymer chain. Temperature range from -20 °C to +175°C.

Acrylonitrile-buta-diene natural rubber (NBR - Nitrile)

NBR rubber is above all resistant to oils, especially hydraulic oils, lubricants, petrol and other aliphatic hydrocarbons, diluted acids and lyes. Good physical values such as high friction resistance and ruggedness and good temperature resistance (-25 °C up to +120 °C, in part to -40 °C) give this natural rubber a wide range of uses.

Ethylen-Propylen-Dien-Kautschuk (EPDM)

The range of uses of peroxydically cross-linked EPDM includes in hot water and steam seals. EPDM is also very resistant to ageing and ozone. Compared with the usual types of synthesis natural rubber it has good resistance to cold temperatures. EPDM is not resistant to aliphatic or aromatic hydrocarbons or mineral oil products. Resistance to chemicals, and also to oxidising agents, is very good. Temperature range from -50 °C to +140 °C depending on type.

Fluoro natural rubber (FPM - FKM - Viton)

Outstanding resistance to mineral oils, aliphatic and aromatic hydrocarbons, as well as CHCs, concentrated and diluted acids, and weak alkalis. Excellent resistance to high temperatures (up to 200 °C) and a low temperature resistance down to -40 °C depending on the type used as well as good mechanical attributes and an exceptionally good ageing resistance make FPM a cut well above the usual synthesis natural rubbers.

Hydrogenated nitrile natural rubber (HNBR)

Oil seals made of HNBR are characterised by excellent properties that include high resistance to mineral oils with additives, low steam and gas permeability, good cold flexibility down to -30 °C depending on type, good ozone resistance and friction resistance. HNBR seals withstand heat up to 150°C.

Polytetrafluoro-ethylene (PTFE - Teflon)

Broad chemical resistance, except against liquid alkaline metals and fluorine gas under pressure. Good sliding qualities, low wear and tear. Temperature range from -200 °C to +260°C. PTFE has hardness of approximately 95 °Shore and installing these O-rings in split grooves is recommended or alternatively the use slit or sheathed types due to the low elasticity.

Silicone rubber (VMQ)

Areas of application of this rubber are suggested by its outstanding temperature resistance (-55 °C to +200 °C), although this must not be applied to hot water or steam. Although silicone rubber almost matches NBR in oil resistance, it does not match the latter's physical and mechanical properties.  

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Are you looking for more information about the different materials, or do you have questions about which type of material you need, feel free to contact us.

Contact us to discuss your requirements of oil seal custom. Our experienced sales team can help you identify the options that best suit your needs.