By definition, an O-ring is technically a gasket, but not all gaskets are O-rings. What is a Gasket?Ī gasket is a mechanical seal consisting of a flat piece of material. This circular shape allows O-rings to fit over cylindrical-shaped components, such as pipes and hoses. They consist of a looped piece of elastomer material with a hollow center. Even when exposed to severe pressure, O-rings will maintain their integrity while preventing liquids, gas or air from escaping the respective components with which they are used.Īlthough they are available in a variety of sizes, all O-rings have the same shape. Some O-rings, in fact, can withstand pressure in excess of 5,000 pounds per square inch (PSI). They are designed to create a sealed mating surface that’s resistant to pressure. What Is an O-Ring?Īlso known as a packing joint, an O-ring is a type of mechanical seal consisting of a circular-shaped piece of elastomer material. While both O-rings and gaskets offer a sealed mating surface, though, they aren’t necessarily the same. Once installed, the respective component will seal the components so that they don’t leak. When multiple components are joined together, an O-ring or gasket may be installed at the area where they meet. They are found in everything from machines and motors to plumbing fixtures and gas pipelines. O-rings and gaskets are commonly used to create a sealed mating surface between two or more components.
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