​ This article is about some of the newer technology on the market for butterfly valves. What we have see traditionally in butterfly valves is a severe lack of control outside of the "sweet spot", which is between about 20% and 60% of rated Cv. The curve, instead of being the ideal equal percentage, looks considerably more like a linear line. This becomes an issue if the valve will ever need to effeciently control media. It makes operators and technicians have a difficult tim