O-rings are rubber seals with a circular cross section. They are called O-rings because of their O-shaped cross section.
O-rings are the most common sealing products due to their simple manufacturing, affordable price, reliable functions, and simple installation requirements. O-rings can withstand pressures of tens of megapascals. They are mainly used for static and reciprocating seals. When used for rotary motion sealing, they are limited to low-speed rotary sealing devices.
