D341F46The worm wheel type fluorine lining flange butterfly valve is suitable for aqua regia, flowing acid, hydrochloric acid, hydrofluoric acid and various organic acids, strong acids and strong oxidants at - 50 ℃ ~ 150 ℃. FEP is also applicable to the pipelines with various concentrations of strong alkali organic solvents and other corrosive gases and liquid media. The driving modes can be divided into electric fluorine lining butterfly valve, pneumatic fluorine lining butterfly valve, handle fluorine lining butterfly valve, and so on Worm gear lining fluorine butterfly valve, etc.
In addition to cut-off and cut-off, the sealing performance of fluorine lined butterfly valve has been regarded as the main evaluation index in recent years, which is favored by the market. In addition, the butterfly valve has the advantages of small volume, light weight and simple structure. Compared with the gate valve with the same parameters, the average weight is reduced by 30-50%, and the opening and closing process can be realized by rotating the butterfly plate 90 degrees, Due to the fact that the butterfly plates on both sides of the shaft are subjected to approximately equal medium forces, the torque is opposite, so the opening and closing torque is small.

1. The center line butterfly valve is that the whole butterfly plate and valve seat are concentric in 360 ° circle (center line), with bidirectional sealing function, and the pressure and flow can be adjusted freely;
2. Eccentric butterfly valve is a two-dimensional direction. The cam effect caused by eccentricity will make the sealing pair produce enough sealing specific pressure. With the increase of working pressure, the sealing pair will produce enough sealing specific pressure, and with the increase of working pressure, the sealing effect will be more ideal
3. Four stage loading elastic seal ensures zero leakage inside and outside the valve;
a. The reasonable interference between the special transition curve of shaft head and butterfly plate circular connection and valve seat;
b. The end face of shaft head is composed of elastic O-ring, rigid washer and elastic rubber pad at shaft shoulder;
c. The radial direction of the shaft adopts the combination of O-ring and metal pad;
d. The valve seat is inlaid in the valve body groove with elastic strip;
4. Adjustable bullet positioning, accurate positioning and simple structure