Aug. 09, 2020
In the 1930s, the United States invented the butterfly valve. It was introduced to Japan in the 1950s, and it was only widely used in Japan in the 1960s. However, it was promoted in China after the 1970s. In the world, gate valves generally above DN300 mm have been replaced by butterfly valves. Compared with the gate valve, the butterfly valve has the advantages of short opening and closing time, small operation moment, small installation space and light weight.Compared with gate valves, butterfly valves have short opening and closing time, small operating torque, small installation space and light weight. The disadvantage of the rubber soft-seal butterfly valve is that when used for throttling, cavitation will occur due to improper use, causing the rubber seat to peel off and damage. Therefore, metal hard-sealed butterfly valves have been developed internationally, and the cavitation area has been reduced. In recent years, China has also developed metal hard-sealed butterfly valves. In recent years, Japan has also developed a new generation of cavitation-resistant, low-vibration, and low-noise Comb-tooth butterfly valve.In recent years, Japan has also developed a new generation of comb-tooth butterfly valves that are resistant to cavitation, low vibration and low noise.