Check Valves Factory introduces the principle and structure of ball valves:
1. The principle of ball valve
In the pipeline or waterway, the ball valve can play the role of controlling the internal isolation or connection of the pipeline. It can effectively control the flow of liquid and gas. It only needs to turn the valve stem gently to control the flow, and the ball valve has good airtightness, so it is very convenient to use. The sphere of the ball valve also reflects its working principle. The ball surface of the ball valve will be covered with a layer of colloidal film. Whenever the switch needs to be closed, this film will play a very good sealing effect, which can fill the gap between the ball and the valve wall to prevent water leakage. Therefore, the ball valve has very good tightness.
2. Ball valve structure
The sealing performance is good, but the load of the sphere bearing the working medium is all transferred to the outlet sealing ring. Therefore, it is necessary to consider whether the material of the sealing ring can withstand the working load of the sphere medium. When subjected to high-pressure shock, the sphere may shift. . This structure is generally used for medium and low-pressure ball valves. Valve-fixed ball valve The ball of the ball valve is fixed and does not move after being pressurized. The fixed ball valve has a floating valve seat. After being pressurized by the medium, the valve seat moves, so that the sealing ring is tightly pressed on the ball to ensure the sealing. Bearings are usually installed on the upper and lower shafts with the ball, and the operating torque is small, which is suitable for high-pressure and large-diameter valves.