Oil Seal : An introduction

Oil seal is a component of the machinery that is used to seal lubricants or seal . Lubricants are used in the part of the machine that contact to ensure that they are moving evenly and last longer. Oil seals are used to prevent fluid from leaking through "The gap of bearings" of the machine. With the advancement of engineering thus not only necessary to prevent the leakage of the lubricant but to prevent the water chemicals or dust into the machine. Oil seal is used to serve both these respects. O-rings have a mechanism of action similar to the oil seals. Oil seal is used mainly in applications with rotating shaft.

Structural components of the oil seals consist of three parts.
   1 Elastomeric Sealing Matterial (rubber seal)
   2. Metal Case (sealing frame).
   3. Gartor Spring (Spring Press).

The materials used to produce the rubber seal. The materials used to manufacture rubber seals used in the manufacture oil seals are many different types but the most widely used in mechanical parts common to have a few species. The species that need very special will be produced and used locally, but the price will be higher as well. Popular materials are summarized as follows.

1. Nitrile (NBR)
  Nitrile rubber is a common group of acrylonitrile terpolymer Butadiene by arylonitrile nitrile compound is a major component (18% to 50%), affecting the physical properties of the material. Impact resistance and heat the oil in a temperature range of -40 ° C to 120 ° C (oil) or 90 ° C (water) while also having the flexibility and resistance to compression force. Nitrile rubber has better mechanical properties compared to other types of rubber and a high wear resistance. It is commonly used in the oil seals.

2. EPDM (Ethylene Propylene)
   EPDM is polyethylene (ethylene) and polypropylene (propylene), which Ehylenepropylene diene- (EPDM) are produced using monomers III and is particularly useful for sealants in hydraulic fluids. Spring Cleaning The broad operating temperature range -65 ° F to 300 ° F (-55 ° C to 150 ° C) In addition, the use of steam and temperatures below the normal temperature applications as well.

3. Viton® or Fluorocarbon (FKM)
  Viton® (fluorocarbon rubber) has many great features that have been developed to produce a rubber seal. The property unprotected in high temperature in every condition, air, fuel, hydraulic devices, fuels, solvents, or chemical solvents are some tons of material that is chosen. rubber Seal (Seal rubber) Viton® is capable of a temperature range of -15 ° F to 450 ° F (-26 ° C to 232 ° C).

Viton Oil Seals for Motor Hydrolic and gear box

Viton Oil Seals  for Motor Hydrolic and Gear box