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O-Rings are one-piece molded objects often made from elastometric seal with a circular cross-section. They have wide applications in many industrial sectors and are used to prevent fluid movement between mechanical parts by maintaining contact with the inner and outer walls enclosing the ring. They  are often assembled with a resiliency that provides a zero-pressure seal. When pressure is applied, the fluid forces these O-rings across the groove and cause more deformation. This leads to the ring flow up to the fluid passage and seals it against leakage. These seals are self-energize seals and relay pressure inside the container or pipe to give them the pressure necessary to form the seal. They are inserted into cavities called glands used either axial or radial designs. O-rings can be measured by their inner diameter and outer diameter, material hardness and the material composition. A wide range of O-rings is manufactured by a host of manufacturers.
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