Is a butterfly valve just a butterfly valve?

摘要

In the world of valves, it is common for many to categorise valves and have the perception that they are all created equal and/or share the same performance characteristics. The category of 'butterfly valves' is a good example of this belief. The term 'butterfly valve' has been applied to this design due to the internal modifier, the disc, and the shaft, which closely mirror a butterfly's wings and body.