Introduction to the basic structure of the vacuum ball valve

The sealing is good, but the load of the ball receiving the working medium is completely transmitted to the outlet sealing ring. Therefore, it is necessary to consider whether the sealing ring data can withstand the working load of the spherical medium, and the ball may be biased when subjected to a high pressure impact. shift. This structure is generally used for medium and low pressure ball valves.

The ball of the ball valve is fixed and does not move after being pressed. The fixed ball valve has a floating valve seat. After the medium pressure, the valve seat moves and the sealing ring is pressed against the ball to ensure the seal. Usually mounted on the upper and lower shafts of the ball, the operating torque is small, suitable for high pressure and large diameter valves.

In order to reduce the operating torque of the ball valve and the firmness of adding the seal, an oil seal ball valve is formed, and a special lubricating oil is injected between the sealing faces to form an oil film, which enhances the sealing property and reduces the operating torque. Suitable for high pressure and large diameter ball valves.