How to use fluorine lined DC globe valve

      Fluorine lined DC globe valve It is a type of fluorine lined globe valve. The opening and closing component of the fluorine lined DC globe valve is a plug shaped valve disc, with a flat or conical sealing surface, and the valve disc moves linearly along the centerline of the fluid. One thing to note is that fluorine lined DC globe valves are only suitable for fully open and fully closed, so it is not allowed to use fluorine lined DC globe valves for regulating and throttling purposes. Compared to other valves, fluorine lined DC globe valves have a simple structure and are relatively easy to manufacture and maintain. In addition, the friction between the sealing surfaces of the fluorine lined DC globe valve is small, which makes the sealing performance of the fluorine lined globe valve good and greatly extends the service life of the fluorine lined DC globe valve; However, fluorine lined DC globe valves have relatively high requirements for conveying media and are not suitable for media with particles, high viscosity, and easy coking.
Fluorine lined DC globe valves belong to forced sealing valves, so when closing the valve, pressure must be applied to the valve disc at the same time to ensure that the sealing surface does not leak. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the frictional force between the valve stem and packing and the thrust generated by the pressure of the medium, resulting in a greater force to close the valve than to open it. Therefore, the diameter of the valve stem of a fluorine lined DC globe valve is larger than that of a regular globe valve, otherwise the valve stem will bend at the top. After the emergence of self sealing valves, the flow of the medium in the shut-off valve is changed to enter the valve chamber from above the valve disc. At this time, under the pressure of the medium, the force to close the valve is small, while the force to open the valve is large, and the diameter of the valve stem can be correspondingly reduced. Meanwhile, under the influence of the medium, this type of valve is also relatively tight. The "Three Modernizations" of valves in our country once stipulated that the flow direction of globe valves should be from top to bottom. About Fluorine lined DC globe valve During use, it is important to note that the handwheel and handle are not allowed to be used for lifting purposes. In addition, during installation, it should be noted that the flow direction of the medium should be consistent with the direction indicated by the arrow on the valve body.