Seal lip &
Seal materials |
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MSO Seals and Gaskets can
custom machine Oil seals as well as mold any oil seal you may require,
Metric or Standard or special. |
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SEALING LIP MATERIALS |
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The sealing lips are made of a compound consisting of one or more basic
elastomers and a series of ingredients such as reinforcing fillets,
plasticisers, antioxidants, accelerators, etc. which provide the product
with specific properties. |
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Compound formulations are aimed at providing the |
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material with the following properties: |
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Stability when in contact with the fluid the
seal is designed |
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for stability at operating temperatures. |
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High elasticity modulus |
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Wear resistance |
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Low friction coefficient |
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Rubber grade used include: |
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Nitrile rubber |
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Silicone rubber |
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Fluorinated rubber |
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Nitrile Rubber |
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This is the most widely used
elastomer in current applications. More specifically, it is suitable for
ensuring |
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sealing in the presence of: |
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Petroleum derivatives ( petrol, diesel oil) |
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Petroleum oils and greases (oils for engines,
gear boxes, |
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differential gears,etc.) |
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Fuel oils |
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Animal and vegetable oils and fats |
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Water and aqueous solutions (lyes) |
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The temperature can vary from
-40 C to +120 C |
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Nitrile rubber is NOT
RECOMMENDED for: |
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Oils and greases containing aggressive
additives |
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Aromatic hydrocarbons (benzol) |
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Chlorinated solvents (Tri, Per, Tetra) |
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Ketones |
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Hydraulic phosphoric esters |
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SILICONE RUBBERS |
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It is particularly resistant
to atmospheric agents, light and ozone. It has a good resistance to high-aniline content and petroleum
oils; it can be also used with sulphur-containing oils. |
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Among currently used rubbers
it features the lowest friction coefficient. |
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In spite of lower tear
resistance and tensile strength, silicone rubber is often used due to
the consistency of the characteristics at both low and high
temperatures. |
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The temperature can vary from
-50 C to +180 C |
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Silicone rubber is NOT
RECOMMENDED for seals in the presence of acids, alkalis, high-pressure
steam and boiling water (hydrolysis), petrols, aromatic hydrocarbons and
chlorinated solvents |
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FLUORINATED RUBBER (Viton®) |
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This rubber is characterized
by an excellent heat resistance. In fact its elastic properties remain unaltered permanently up to
200 C |
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for 3000 hours up to 230 C |
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for 1000 hours up to 260 C |
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for 240
hours up to 290 C |
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for 18
hours up to 316 C |
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Moreover, this rubber offers
unequalled performances in contact with : |
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Aliphatic hydrocarbons |
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Aromatic hydrocarbons (toluol,
benzol and xylol) |
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Vegetable oils and fats as
well as petroleum oils and greases |
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even containing additives |
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Chlorinated solvents |
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Acids and chemical agents |
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Ozone |
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Light and atmospheric agents |
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The temperature can vary from
-30 C to +200 C |
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It is NOT RECOMMENDED for use
in the presence of : |
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Low molecular weight esters
and ethers |
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Ketones |
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Some amines |
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Hot anhydrous hydrofluoric
acid |
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Chlorosulphonic acids |
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Viton®)
updated to read viton® is a registered trademark of DuPont Dow Elastomers. |
Teflon