發布時間：2022-01-04瀏覽量：2002
The size of the friction force of the high platform ball valve depends not only on the working pressure of the medium and the diameter of the valve, but also on the form of the ball valve, the structure of the sealing and supporting parts and the properties of the sealing material, as well as each specific structure, the sealing seat The friction force on the ball valve depends on the rotation angle of the ball valve.
The torque of the high-platform ball valve under normal differential pressure: when the high-pressure ball valve is rotated and opened to 30°, the upper limit appears, and when it is fully opened (90°), it is zero. In fact, when the ball valve is turned to 80°, the pressure The difference is usually much smaller than the upper limit. When the ball valve is closed, the pressure difference is very large, and it gradually decreases as its opening degree increases. Therefore, when the pressure is constant, when the torque is rotated to 30° to 40°, the friction force is often small, so In this case, it is often better to open and close the high platform ball valve, and it will not damage the valve.
The friction force of the high platform ball valve mainly depends on the above factors. We can pay attention to the above factors to avoid some unnecessary factors.
