Butterfly valve development process and the use of knowledge

The butterfly valve invented by the United States in the 1930s, China's promotion after 70 years. The butterfly valve has a good fitness
And reliability, widely used in the production and living, this article describes the butterfly valve the course of development, and use precautions
.
, Butterfly valve development:
In the 1930s, the United States invented the butterfly valve, was introduced into Japan in the 1950s and 1960s, is commonly used in Japan,
And promotion in China after 70 years. The world generally DN300 mm butterfly valve has been gradually
Instead of the gate valve. Compared to the butterfly valve and gate valve opening and closing time is short, small moments, small installation space and light weight
. Example, dn1000 about 2T butterfly valve, gate valve 3.5t, and the butterfly valve is easy with a variety of drive unit combination,
Good durability and reliability.

air cylinder manufacturers

Rubber sealing butterfly valve shortcomings throttle, cavitation due to improper use, peel the rubber seat
Fall, injury happens. To this end, the international development of metal sealing butterfly valve, cavitation zone is decreased in recent
Years, China has also developed a metal sealing butterfly valve in Japan in recent years has also developed resistance to cavitation, low vibration, low noise
Comb-shaped butterfly valve. Usually the life of the seal seat in the normal circumstances, the rubber 15, -20, 80 metal
-90 Years. But how correct selection depends on the conditions required.

pilot valves