2016-03-14
Fluorine-lined globe valve has the dual functions of switch and flow regulation, which can easily open and close the air circuit without affecting the no-flow and ensure the repeatability of flow. Starting slowly reduces the impact of instantaneous pipeline pressure on the instrument.A damper is added, which greatly improves the service life of needle valves. The fluorine-lined cut-off valve is specially designed for controlling corrosive or strongly corrosive medium. The inner surface of the valve body is covered with various fluoroplastics which can be selected. It is suitable for different working temperatures and fluid pipelines. It has the characteristics of high strength and good corrosion resistance. The high-performance fluorine-lined cut-off valve is characterized by: the seat seal ring is composed of multi-layer stainless steel sheets on both sides of the soft T-shaped seal ring. Therefore, unlike the existing technology, the utility model does not install a soft or hard multi-layer sealing ring on the valve plate, but directly mounts the ring on the valve body, and adds a regulating ring between the pressure plate and the valve seat is an ideal two-way hard sealing method. The structure of fluorine lined globe valve effectively compensates the tolerance zone between sleeve and valve body and the elastic deformation of valve stem under medium pressure, and solves the sealing problem of valve in the process of two-way interchangeable medium transmission.
The sealing surface of the valve plate and the valve seat is an oblique conical structure, and the temperature-resistant and corrosion-resistant alloy material is welded on the inclined conical surface of the valve plate; the spring fixed between the adjusting ring pressing plates and the adjusting bolt assembly on the pressure plate are assembled. When in the countercurrent state, the seal between the valve plate and the valve seat of the fluorine-lined shutoff valve is pressed against the torque of the drive device to press the valve plate against the valve seat. It will replace the gate valve and the ball valve. With the increase of the pressure of the reverse medium, when the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, the deformation of the spring of the adjusting ring after the load is loaded can compensate the tightness of the valve plate and the valve seat and the sealing surface. The pressure acts as an automatic compensation.