The opening and closing part of the ball valve is a ball with a circular channel, rotating around the axis perpendicular to the channel, the ball rotates with the stem to achieve the purpose of opening and closing the channel. Ball valves require only a 90 degree rotation and a small torque to close tightly. According to the needs of working conditions, the assembly of different driving devices to form a variety of different control methods of the ball valve, such as electric ball valve, pneumatic ball valve, hydraulic ball valve and so on.
Ball valve working principle:
When the ball valve rotates 90 degrees, the inlet and outlet should be all spherical, so as to close the valve and cut off the flow of the medium.When the ball valve turns 90 degrees, the inlet and outlet should all present the ball mouth, so as to open the flow, and basically no flow resistance.
Ball valve structure principle:
1 ball valve is not limited by the installation direction, the flow of the medium can be arbitrary. Fluid resistance is small, full diameter ball valve basically no flow resistance.
2. Ball valve simple structure, relatively small size, light weight, easy maintenance.
3. Tight and reliable. It has two sealing surface, and the sealing surface material of the ball valve is widely used in various plastics, good sealing, can achieve complete sealing. It has also been widely used in vacuum systems.
4. Ball valve is suitable for frequent operation, opening and closing quickly, lightweight. Easy to operate, open and close quickly, from fully open to fully closed as long as the rotation of 90 degrees, convenient for remote control.
5. Convenient maintenance, ball valve structure is simple, the sealing ring is generally mobile, disassembly and replacement are more convenient.
6. Ball valve seal performance is good. In full open or full close, sphere and valve seat sealing surface and the dielectric isolation, medium through, will not bring | valve I door sealing surface erosion.
7. Wide application range, small to a few millimeters, large to a few meters, from high vacuum to high pressure can be applied.
8. Ball valve can be used in medium with suspended solid particles because of its wipeability during opening and closing.
9, ball valve fluid resistance is small, no vibration, small noise.