The large-diameter butterfly valve is a fluid switch that uses a disc-type opening and closing member to reciprocate about 90 degrees. It is usually used as a blocking opening, flow regulating valve and damping valve in liquid, gas, and other fluid pipeline systems. Large-diameter butterfly valve refers to a valve with a diameter greater than 100cm.

 

The original butterfly valve is a simple, loosely closed flapper valve, simple fluid adjustment switch

 

With the advancement of scientific and technological civilization, butterfly valves are now not only simple in structure, small in size, light in weight, saving in material consumption, small in installation size, but also in small driving torque, easy and fast to operate, and can also have a good flow rate at the same time. The joint function and closing and sealing characteristics are one of the fastest-growing valve varieties in the past ten years. Especially in developed countries such as the United States, Japan, Germany, France, and Italy, butterfly valves are widely used. The variety and number of its use continue to expand, and it is developing towards acid and alkali resistance, high temperature, high pressure, large diameter, high sealing performance, long life, excellent adjustment characteristics, and one valve with multiple functions. Its reliability and other performance indicators All have reached a high level, and have partially replaced the globe valve, gate valve and ball valve. With the advancement of butterfly valve technology. In the foreseeable short period of time, especially in the use of large and medium calibers and medium and low pressures, butterfly valves will become the dominant valve form.