O type rubber ring is a circular cross section of the rubber ring, because of its cross section is O, it is called O type rubber ring. Is one of the most widely used in hydraulic and pneumatic transmission systems. Usually in Taiwan enterprises, Japanese companies called Ring O.

Rubber O-ring is with circular cross section of the circular rubber ring, is mainly used for mechanical components under static conditions to prevent the leakage of liquid and gaseous media. In some cases, it can also used to do axial reciprocating motion and low speed rotary motion of the dynamic sealing element. According to different conditions, were chosen different materials and adapt. Usually used in rubber O-ring to try to use a large section of the O ring. In case the same clearance, rubber O-ring is squeezed into the interstitial volume should be less than the maximum permissible value of the squeeze. For different kinds of stationary seal or seals for dynamic application occasions, rubber O - rings for the designer provides an effective and economical sealing element. O-ring is a bidirectional sealing element. When installing the initial radial or axial compression, given its initial O-ring sealing ability. The seal force generated by the system pressure and the initial sealing force synthesis, which increases with the increase of the pressure of the system. O-ring in static sealing occasions, display a prominent role. However, in appropriate cases in the dynamic, O-rings are commonly used, but it is the speed and pressure at the seal of the limit.