O-ring is a circular rubber ring with a circular cross-section, mainly used for mechanical components in static conditions to prevent leakage of liquid and gaseous media. In some cases, it can also be used as a dynamic sealing element for axial reciprocating motion and low-speed rotary motion. According to different conditions, different materials can be selected to adapt to them. O-ring rubber ring is usually selected to try to use a large cross-section of the O-ring. In the case of the same clearance, the volume of the O-ring being squeezed into the gap should be less than the maximum allowable value of its squeeze.
for different types of fixed seals or dynamic sealing applications, o-ring provides designers with an effective and economical sealing element. O-ring is a two-way action sealing element.
the initial compression in the radial or axial direction during installation gives the o-ring its own initial sealing capability. the sealing force generated by the system pressure and the initial sealing force form the total sealing force, which increases with the system pressure. O-rings show a prominent role in static sealing situations. however, in dynamic and appropriate situations, o-rings are also often used, but it is limited by the speed and pressure at the seal.