VACCUM RINGS O-rings can be used in vacuum applications as they are capable of providing a reliable seal against air and other gases. However, not all types of O-rings are suitable for vacuum applications. O-rings made of materials such AS FKM are commonly used in vacuum applications because they have low outgassing properties, which means that they release very little gas or vapor when exposed to a vacuum environment. It is important to note that O-rings used in vacuum applications should be properly designed and installed to ensure a proper seal. The O-ring material, size, and cross-section should be carefully selected based on the specific vacuum application requirements. Additionally, it is important to consider factors such as temperature, pressure, and the type of gas or vapor present in the vacuum environment when selecting an O-ring for vacuum applications.