Reasons For The Top Bending Of The Stem Of The Fluorine-lined Dc Stop Valve

Lined Globe Valve is a common fluorine-lined valve. Its opening and closing parts are plug-shaped valve discs, and the sealing surface is flat or conical. The valve disc moves linearly along the center line of the fluid. The movement of the valve stem of the fluorine-lined DC stop valve includes lifting rod type and lifting and rotating rod type. The fluorine-lined DC stop valve is different from other fluorine-lined valves in that it is only suitable for full opening and full closing, and cannot be used for regulation and throttling.
The fluorine-lined DC stop valve is a forced sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage. When the medium enters the valve from under the valve disc, the resistance that the operating force has to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the fluorine-lined DC stop valve should be large, otherwise the valve stem will bend.