The development history of butterfly valve and advantages

30 s, the United States invented the butterfly valve, was introduced into Japan, 50 s and 60 s was widely used in Japan, while in China after the 70 s. At present, the general in the world is more than 12 mm butterfly valve has gradually replaced the gate valve. Compared with the butterfly valve and gate valve opening and closing time is short, small operation torque, small installation space and light weight. About 2 t DN1000, for example, butterfly valves, gate valves and about 3. 5 t, and butterfly valves easily combined with various drive, good durability and reliability. Butterfly valve open/close convenient rapidly, energy saving, small fluid resistance, can often operate. Simple structure, small volume, light weight. At least can transport the mud in the apertures accumulated liquid. Under low pressure, can achieve good sealing. Adjust the good performance.