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There are two basic types of Fully Lined Tetrafluoro Wafer Butterfly Valve, namely D71F4 and D71F46 (midline) full-lined butterfly-clip valves, which adopt two-piece valve body combination. The valve seat and inner liner are integrated. When the valve works, only the full-plastic seat contacts with the lined butterfly-plate and medium, and the product can follow "except molten alkali metal and elemental fluorine". Any medium corrosion, in which the D71F46 stem and butterfly plate (forged) as a whole, the surface is uniformly coated with a layer of FEP. The inner surface of the valve passage is smooth, the fluid resistance is small, the CV value is small, the circulation ability is strong, and the torque is moderate. The four-stage sealing structure and the elastic cushion seat of SI rubber with temperature resistance and aging resistance are used outside the sealing surface to completely achieve zero leakage of the medium. The expanded D41F4 and D41F46 flanges are connected with the full lining of butterfly valve body, and the butterfly plate is stainless steel semi-lined butterfly valve.
Structural characteristics
Midline butterfly valve is concentric (midline) with the whole butterfly plate and seat in 360 degree circumference. It has two-way sealing function and can adjust pressure and flow freely.
Four-stage loading elastic seal absolutely ensures zero leakage inside and outside the valve.
Special transition curve at the circumferential connection of axle head and butterfly plate and reasonable interference of valve seat;
The combination of color elastic O-ring at the end of axle head and rigid washer and elastic rubber pad at the axle household;
The combination of O-ring and metal cushion is adopted in the radial direction of the shaft.
The seat is mounted in the body groove with elastic strips.
Adjustable elastic bullet positioning, accurate positioning, simple structure.
