![](https://tiimg.tistatic.com/eseller-catalogs/images/template130879/theme130879/phone-icon.png)
The butterfly valve gets its name from how the movement is similar to a wing for flight. The rod is analogous to a butterfly's body, while the disc moves like a butterfly wing. A butterfly valve's motion is similar to that of a butterfly that has landed with the wings moved up and down with a 90-degree motion.