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Double eccentric butterfly valve, also called high performance butterfly valve, is further improved on the basis of single eccentric butterfly valve, its structural characteristics of the butterfly plate rotary axis (i.e., stem axis) and butterfly plate sealing cross-section offset by one size, and with the valve body channel axis offset by one size. Compared with the centerline butterfly valve, the effect of double eccentricity makes the valve open and the butterfly plate can be quickly separated from the valve seat, greatly eliminating the unnecessary excessive squeezing and scraping phenomenon between the butterfly plate and the valve seat, reducing the opening torque, lowering the wear and tear, and improving the life of the valve seat.

1、Simple structure, good general interchangeability, low price. 2、Stem seal is not easy to deform so as to avoid the stem leakage phenomenon, the overall support performance is good, stable and firm. 3、The amount of seat rubber is small, the potential impact of expansion is small, easy to control the torque in the appropriate range.

Three eccentric metal sealed butterfly valve is a new generation of butterfly valve products developed by introducing German technology. Product performance has been better than the leading level at home and abroad, widely used in metallurgy, petroleum, chemical industry, electric power, municipal construction and other industrial pipelines for cutting off or regulating the flow of media.

Butterfly valve is a kind of valve that uses disc type opening and closing parts to turn back and forth about 90° to open, close or regulate the flow of medium. It not only has the advantages of simple structure, small volume, light weight, material consumption, small installation size, small driving torque, easy to operate, rapid, and can also have a good flow regulation and closing sealing characteristics, is one of the fastest growing valve varieties in recent years. Butterfly valve is easy to combine with various driving devices, has good durability and reliability. Its use in a wide range of fields, the use of varieties and the number of rising trend, and to high temperature, high pressure, large diameter, high sealing, long life, excellent regulating characteristics, as well as a multi-functional development of the valve, its reliability and other performance indicators have reached a high level.

The centreline double flange butterfly valve is designed according to the requirements of large pipeline network and belongs to mesh valve.

Butterfly valve is a kind of valve that uses disc type opening and closing parts to reciprocate about 90° to open, close or regulate the flow of medium. It not only has the advantages of simple structure, small size, light weight, material consumption, small installation size, small driving torque, easy to operate, rapid, and can also have a good flow control function and close the sealing characteristics, is one of the fastest-growing valve varieties in recent years. Butterfly valve is easy to combine with various driving devices, has good durability and reliability. Its use in a wide range of fields, the use of varieties and the number of rising trend, and to high temperature, high pressure, large diameter, high sealing, long life, excellent regulating characteristics, as well as a multi-functional development of the valve, its reliability and other performance indicators have reached a high level.