The manual flanged butterfly valve is of simple structure, little space and light weight. It can be turned on or off in a short time just by rotating the lever 90°, which is very simple and convenient in operation. Also, it is of excellent function of controlling fluid. When it's fully opened, the thickness of the disc becomes the main obstacle to the passage of the medium, which means small pressure of valve and great feature of controlling flows.
Manual flanged butterfly valves can be used in widely range as the above characteristics, such as oil, gas, chemical, water treatment and other fields. In addition, it also plays an unique role in cooling water system at thermal power station. It is more suitable to produce large-diameter valve so that it can control flow better.