The butterfly valve is simple in structure, small in size and light in weight, and only consists of a few parts. Moreover, it can be opened and closed quickly only by rotating 90 °, which is simple to operate. At the same time, the electric valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics. Butterfly valve has two sealing types: elastic seal and metal seal. For elastic sealing valve, the sealing ring can be embedded on the valve body or attached to the periphery of the butterfly plate???

Looking at the development in recent years, the domestic pneumatic butterfly valve is developing very rapidly, and more and more manufacturers are optimistic about the valve market. Many years ago, the products were basically introduced from abroad, such as the products in the hardware market, mainly Taiwan products. With the continuous development of domestic production technology, many manufacturers have launched a variety of models of valves to achieve "make in China".