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2024-05-24 JOINTEFLON

An O-ring, also known as a packing or a toric joint, is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a round cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, forming a seal at the interface.

The O-ring may be used in static applications or in dynamic applications where there is relative motion between the parts and the O-ring. Dynamic examples include rotating pump shafts and hydraulic cylinder pistons. Static applications of O-rings may include fluid or gas sealing applications in which:

(1)the O-ring is compressed resulting in zero clearance, 

(2)the O-ring material is vulcanized solid such that it is impermeable to the fluid or gas

 (3) the O-ring material is resistant to degradation by the fluid or gas.The wide range of potential liquids and gases that need to be sealed has necessitated the development of a wide range of O-ring materials.