Overview of Fluorine-Lined Ball Valves

by:Lianke Valve     2022-08-27
The fluorine-lined ball valve manufacturer's overview of the fluorine-lined ball valve The fluorine-lined ball valve is evolved from a cock. Its opening and closing parts are used as a sphere, and the sphere is rotated 90o around the axis of the valve stem to achieve the purpose of opening and closing. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium on the pipeline. The ball valve designed with V-shaped opening also has a good flow adjustment function. The ball valve is not only simple in structure and good in sealing performance, but also small in volume, light in weight, low in material consumption, small in installation size, small in driving torque, easy to operate and easy to open and close quickly within a certain nominal diameter range. One of the valve varieties that has developed rapidly in the past ten years. Especially in industrialized developed countries such as the United States, Japan, Germany, France, Italy, Spain, and the United Kingdom, the use of ball valves is very extensive, and the variety and quantity of the ball valve are still expanding. Its reliability and other performance indicators have reached a high level, and it has partially replaced gate valves, globe valves and throttle valves. With the technological advancement of ball valves, it will be widely used in oil and gas pipelines, oil refining crackers and the nuclear industry in the foreseeable short term. In addition, ball valves will also become one of the dominant valve types in the fields of large and medium calibers and medium and low pressures in other industries. The ball valve is a kind of valve that came out in the 1950s. In half a century, the ball valve has developed into a major valve type. The ball valve is mainly used to cut off or connect the medium, and can also be used for the regulation and control of the fluid. The V-shaped ball valve can carry out relatively accurate flow regulation and control, while the three-way ball valve is used to distribute the medium and change the flow direction of the medium. The fluorine-lined ball valve has the following advantages: 1. The fluorine-lined ball valve has low fluid resistance. The ball valve is the one with the smallest fluid resistance among all valves. Even the reduced-diameter ball valve, its fluid resistance is quite small. 2. The switch of the fluorine-lined ball valve is quick and convenient. As long as the valve stem rotates 90°, the ball valve completes the full opening or full closing action, and it is easy to realize rapid opening and closing. 3. The ball valve has good sealing performance. The sealing ring of the ball valve seat is generally made of elastic materials such as PTFE, which is easy to ensure the sealing, and the sealing force of the ball valve increases with the increase of the medium pressure. 4. The stem of the fluorine-lined ball valve has reliable sealing. When the ball valve is opened and closed, the valve stem only rotates, so the packing seal of the valve stem is not easy to be damaged, and the sealing force of the reverse seal of the valve stem increases with the increase of the medium pressure. 5. The opening and closing of the ball valve only rotates 90°, so it is easy to realize automatic control and remote control. The ball valve can be equipped with pneumatic devices, electric devices, hydraulic devices, gas-liquid linkage devices or electro-hydraulic linkage devices. Installation instructions for fluorine-lined ball valve of Gaojing valve: 1. The front and rear pipelines of the fluorine-lined ball valve are ready. The front and rear pipes should be coaxial, and the sealing surfaces of the two flanges should be parallel. The pipeline should be able to bear the weight of the ball valve, otherwise there must be proper supports on the pipeline. 2. Purge the pipelines before and after the valve to remove oil, welding slag and all other impurities in the pipeline. 3. Check the mark of the ball valve to find out that the ball valve is intact. Open and close the valve several times to verify that it is working properly. 4. Remove the protective pieces on the connecting flanges at both ends of the ball valve. 5. Check the valve hole to remove possible dirt, and then clean the valve hole. Even small particles of foreign matter between the seat and the ball can damage the seat sealing surface. 6. Install the valve on the pipeline. Either end of the valve can be installed on the upstream end. The handle-actuated valve can be installed anywhere on the pipeline. However, ball valves with gearboxes or pneumatic drives should be installed upright, i.e. on a horizontal pipeline, with the drive above the pipeline. 7. Install a gasket between the valve flange and the pipeline flange according to the pipeline design requirements. 8. The bolts on the flange should be tightened symmetrically, sequentially and evenly. 9. Connect the pneumatic pipeline (when using the pneumatic driver). 10. The fluorine-lined ball valve operates the driver to open and close the ball valve several times, and it should be flexible and not stagnant, confirming that it works normally. 11. Check the sealing performance of the flange joint surface between the pipeline and the ball valve according to the pipeline design requirements.
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