O-rings are suitable for installation on various mechanical equipment, and they play a sealing role in a static or moving state at specified temperatures, pressures, and in different liquid and gas media. Various types of sealing elements are widely used in machine tools, ships, automobiles, aerospace equipment, metallurgical machinery, chemical machinery, engineering machinery, construction machinery, mining machinery, petroleum machinery, plastic machinery, agricultural machinery, and various instruments and meters. O-rings are mainly used for static sealing and reciprocating motion sealing. When used for rotary motion sealing, they are limited to low-speed rotary sealing devices. O-rings are generally installed in grooves with rectangular cross-sections on the outer circle or inner circle to play a sealing role. O-rings still play a good sealing and shock-absorbing role in environments such as oil resistance, acid and alkali resistance, abrasion, and chemical erosion. Therefore, O-rings are the most widely used seals in hydraulic and pneumatic transmission systems.
