The advantages of butterfly valves are simple structure and good sealing effect; the disadvantage is that there is some disturbance to the water flow when the butterfly valve is fully open.

Structural Characteristics

The basic structural forms of butterfly valves are double offset and triple offset butterfly valves. The operating mechanisms of butterfly valves are usually manual, worm gear, electric, pneumatic, etc. Butterfly valves mainly consist of valve body, disc, shaft, sealing device, bracket, and control device.

Manufacturing Guidelines

The main function of butterfly valves is to seal water, steam, oil, etc. Therefore, the manufacturing guidelines for butterfly valves are to ensure reliable sealing, accurate and flexible operation. The sealing of butterfly valves mainly includes the main sealing between the valve body and the disc, the bearing composite sealing at the shaft part, and the sealing at the joints of various components. To ensure reliable sealing of butterfly valves, it is necessary to ensure that the dimensions, surface roughness, and positional tolerances of these parts meet the requirements of the drawings. It is also important to ensure that the dimensions, surface roughness, positional tolerances, etc. of all components meet the requirements of the drawings.

The application range of butterfly valves is also quite wide. If they are used to control the flow rate, different types and valve body sizes need to be selected. Butterfly valves are widely used not only in general industries such as petroleum, gas, chemical, and water treatment, but also in cooling water systems of thermal power plants.