What is the difference between butt and skive cut rings?

A butt cut joint is typically a straight on a piece of packing when the ends are joined.These cuts or joints are primarily used in rotating applications. Skive cut ring joints are cut at a 45 degree angle, these ends will meet up and lay over each other tightly. These type of ring joints are used mostly in valve applications.

Read more about the Compression Packing installation @ How to install compression packing