Rubber O-ring is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a round cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface. Rubber O-ring may be used in static applications or in dynamic applications where there is relative motion between the parts and the O-ring. Rubber O-rings are one of the most common seals used in machine design because they are inexpensive, easy to make, reliable and have simple mounting requirements.
There are a variety of elastomers that are used to support the function of rubber O-ring in a particular application. The most popular types of elastomers are Buna N and Nitrile. They are known for their toughness, flexibility, and ready availability with suppliers. Other elastomer types are specifically chosen to create custom O-rings for specialized applications. For example, elastomers like Viton and Fluorosilicone are chosen to create O-rings for aerospace and semiconductor applications. The elastomer neoprene is selected for O-rings as it provides good chemical stability and flexibility even in extreme temperatures. Neoprene O-rings can be found in petroleum, refrigeration, and automotive applications. Likewise, silicone is used for applications that utilize high amounts of compressed air.
If you are on the lookout for high quality custom industrial custom O-rings, then take a look at Chien Chie Rubber Technology Company.