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Valves are usually chosen for economic reasons. This is especially true for butterfly valves. One of the reasons for choosing butterfly valves is that they offer lower installation costs. Installation costs are lower because reducers are not usually required because butterfly valves tend to be pipe sizes. In addition, butterfly valves use less metal in the manufacturing process, which makes them cheaper to buy and means they weigh less, reducing the need for support. Another reason people choose butterfly valves is that they can be more compact. This is especially important for packaging plant suppliers, who are always trying to reduce the overall casing size of their equipment.

Typically, butterfly valves are installed in the secondary loop, where the adjustment position is not critical, or in the loop where the pressure drop of the system must be limited, or the designer needs a valve of the same size as the line with few obstructions in the flow path. The use of butterfly valves in these applications may not present any problems. But problems often arise, and that's when the end user faces tough choices. Butterfly valves are linear in nature, with the range of control available in most applications ranging from 25% to 50% of valve strok.