O-rings are rubber sealing rings with a circular cross-section. Because the cross-section is O-shaped, they are called O-rings, also called O-rings. It began to appear in the middle of the 19th century, when it was used as a sealing element for steam engine cylinders.
Because of its low price, simple manufacturing, reliable function, and simple installation requirements, O-rings are the most common mechanical design for sealing. The O-ring bears a pressure of tens of megapascals (thousand pounds). O-rings can be used in static applications as well as in dynamic applications where there is relative movement between components, such as the shaft of a rotary pump and the piston of a hydraulic cylinder.
