What is Lug type butterfly valve?

Butterfly valve is a type of valve which can be used in a variety of chemical services. They are available with small dimensions allowing for use in areas where space is limited, and they allow a high coefficient of flow.
Lug type butterfly valve is one kind of butterfly valve. It also has a variety of the specified types in order to meet the generally increasing specifications. Those types vary in the sizes, materials, connecting ways and manufacturing standards and so on. And they are manufactured to withstand the wide range of the temperature and pressure, together with the expectation to hole reliable tightness.