What is the Advantage and Disadvantage of Oil Seal Material

The most important component of an oil seal is the clastomer material.
To consider the environmental conditions, the following properties
are important:

• Good chemical resistance
• Good resistance to heat and low temperature
• Good resistance to ozone and weather aging
• Good elasticity
• High resistance to water
• Low compression set
• Raw material cost

In order to satisfy various sealing conditions, AAI has many compounds available for your choice.

If you are looking for more details, kindly visit NNK.

• TABLE 1

* maximum temperature limits depend on other operating conditions.

• TABLE 2

• TABLE 3 Fluid Compatibility

LIP MATERIAL TYPE OF FLUID TO BE SEALED NITRILE POLYACRYLATE SILICONE FLUOROELASTOMER Engine Oil E E G E Gear Oil G G X E Turbine Oil No.2 G G G E Machine Oil No.2 G G F E Automatic Transmission Fluid E E F E Petroleum Base Lubricating Oil E E F E Gasoline F X X E Light Oil / Kerosene F X X G Cutting Oil E G F E Grease E E E E E.P. Lubricants G E X E Water - Glycol E X G G Alcohol E X G F 20 % Hydrochloric Acid Solution F F F E 30% Sulfuric Acid Solution F F X E

• E Excellent
  G Good for most applications.
  F Fair, can be used if no other materials available.
  X Not recommended.
• Phosphate Easter and Water Glycol hydraulic fluids are
  not included in the table.
• Water resistance includes steam. No material is ideally
  compatible as lubricity of water is very poor.
• PTFE, Ethylane Acrylate, and other elastomars are available.

NNK-CN Facrory

FKM/FPM(fluoroelastomer)

Advantage:

1. Excellent Resistance to High Temperatures

2. Excellent Resistance to Abrasion

3, Outstanding Oil Resistance

4. Outstanding Weather Resistance

5. Outstanding Ozone Resistance

6. Outstanding Water Resistance

Disadvantage:
   1.Poor Low Temperature Resistance
   2.Poor Oxygenated-Solvent Resistance

Temperature : -20ºC~230ºC , -40ºC~250ºC(special formula)

Application:
  1.For Auto
  2.For Aerospace
  3.For Electronic Products

NNK-CN Facrory

Material    SIL(Silicone Rubber)

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Advantage:
1,Excellent Rebound Resistance
2,Excellent Oxygen and Ozone Resistance
3,Excellent Weathering and Heat Resistance
4,Excellent Heat and Low Temperature Resistance
5,Good heat insulation and heat dissipation.
6,Good electrical insulation

Disadvantage:
1,Poor Aliphatic-solvent Resistance                         
2,Poor Alkaline Resistance

Temperature : -50ºC-220ºC, -60ºC-300ºC(special formula) NNK-CN Facrory

NNK-CN Facrory

Material    NBR(Nitrile Rubber/Buna-N)

Advantages    

1. Outstanding Abrasion Resistance and Good Rebound Resistance

2, Good Elongation and Tensile Strength

3, Outstanding Vegetable and Animal Oil Resistance

4, Strong Resistance to Fuel and Oil

5 Excellent Water Resistance

Disadvantage    
1.Poor Oxygenated-Solvent Resistance
2.Poor Ozone Resistance

Temperature:  -40ºC-100ºC, -55ºC-120ºC(special formula) NNK-CN Facrory

Material    EPDM

Advantage    
1,Excellent Weathering Resistance
2,Excellent Ozone Resistance
3,Excellent Flame Resistance
4,Excellent Heat Resistance
5,Excellent Water Resistance
6,Excellent Oxygenated-Solvent Resistance

Disadvantage    
1,Poor Oxygenated-Solvent Resistance
2,Poor Oil and Fuel Resistance