Rubber O Ring

Rubber O Ring

The O ring is a type of rings or rubber rings used for various industrial purposes, in the form of mechanical seals or gaskets. Often this O rings are produced using natural or synthetic rubber that is made of elastomeric compounds.

O ring is one of the most popular rubber products in many industries and for many purposes. This type of ring washers can also be used as seals and as circular gaskets in many industrial applications.

 O rings are usually used as a specific purpose for the industry, and it is to seal mechanical parts against air or liquid or any other fluid movement. they have elastomeric loop that are perfectly rounded or o shaped manufactured, and, when fitted between different angles, they seal the equipment and machinery and not allow them to pierce or leak air, gas and liquid.

 In fact, the type of O range structure allows them to be placed in a groove at assembly time to seal them in between two or more parts. He can use the O rings in two ways: one as a seal between the valves as a face seal and the other inside the rotary shaft.

Perhaps most of O ring's application in different industries is to use them in the design of machines, and their main reason is their practicality and their cheap price. O rings are very simple to build, easy to install and very reliable.

 According to Orange experts, they are capable of obstructing and tolerating dozens of mega pressure (thousands of psi).

Types of Rubber used in making O Rings

  • Nitrile rubber
  • Silicone rubber
  • Viton rubber
  • Ethylene Propylene rubber
  • Neoprene rubber
  • Polyurethane rubber and etc.

How does an O Ring works?

In order to attach metal surfaces to each other, in order to seal these surfaces against leakage and exhaust of the air, and ... we used the O-Ring works as a seal between these two metal surfaces through the mechanical twist of the electrometric composite.

 The mechanical pressure, pressing the design of a suitable roller, the selection of materials and the pressure of the system sent by the fluid itself, are of the kind of pressure that drives O ring. By changing the seal, the sealing material will be sealed by installing and media pressure, since it causes the mating process to be closed.

However, sometimes high pressure can cause deformation through the slot, which is called extrusion, when sealing occurs, the seal can be failure.

Types of Rubber O-Rings

In general, there are two types of o rings: Static O rings and Dynamic O rings. For those which does not move, they are called static o rings, except for the pulsation that is not due to the cycle pressure.

 but dynamic o rings are those o rings that are used for movement. In both industries, both types of static and dynamic o rings are used, and both have many applications.

Advantages of using his o rings:

  • Cheap and affordable price
  • High reliability
  • Easy production conditions
  • easy to install and use convenient
  • In many industries and machines, their static and dynamic types are used


O rings application cases

the application of o rings in various industries can be classified into two broad categories:

  • Static O Rings Applications
    • The flat part of the O Rings is centered in a squeezed axially in the groove that is like of flat gasket.
    • The cross part of the ring is mounted radially in the groove between the inside and the outside.
    • Elastic gaskets with flat sides are fitted in places where fitting is needed.
    • From this o rings used to seal the tube fittings.

  • Dynamic O rings Application

Generally, Dynamic O rings are used for places where moving parts are slide back and forth. Because frictions occur during this movement, it is necessary to generate different types of dynamic o rings. This type uses o rings in both rotary and reciprocating movement.

These dynamic o rings uses in parts such as wipers, buffers, driving belts and more

Tips for buying O Rings

When shopping O Rings, check out the following:

  • Compatibility type with chemicals
  • The amount of sealing pressure on O Rings
  • The amount of lubrication of O Rings
  • size of o rings
  • The price and final cost of O Rings
  • structural features of O Rings like:
    • Inner Diameter Size
    • External diameter
    • operating temperature O Rings

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