Advantages and disadvantages of various valves—butterfly valve

Butterfly valve: butterfly valve is a kind of valve that uses the disc type hoist to rotate back and forth about 90 ° to open, close and adjust the fluid channel.

advantage:

① The utility model has the advantages of simple structure, small volume, light weight and less consumables, and is not used in large-diameter valves;

② Quick opening and closing and small flow resistance;

③ It can be used for media with suspended solid particles, and can also be used for powdery and granular media according to the strength of the sealing surface. It can be applied to the two-way opening, closing and adjustment of ventilation and dust removal pipeline. It is widely used in gas pipeline and water channel of metallurgy, light industry, electric power and petrochemical system.

Disadvantages:

① The flow regulation range is not large. When it is opened to 30%, the flow will be more than 95%;

② Due to the limitation of butterfly valve structure and sealing materials, it is not suitable for high temperature and high pressure pipeline system. The general working temperature is below 300 ℃ and below PN40;

③ The sealing performance is worse than that of ball valve and stop valve, so it is used where the sealing requirements are not very high.