The same designer who invented and patented the four offset butterfly valve in 2008 is introducing now the newest evolution in butterfly valve design. The first butterfly valve in the world which is not using a regular cone for it’s seat design. In the newly designed V-AXX® valve, the seat shape can be changed around the whole seat without restrictions. If necessary, the angle of the seat, even in the shaft area, can be 25° or more, without changing the angle in other areas. This is only possible due to the unique seat design, which is not formed by a simple cone but by a much more complex figure, not yet named in geometry.