Compared with other types of valves, pneumatic ball valves have angular stroke output torque, quick opening, stable and reliable, wide application, and some of the following advantages:
The thrust bearing reduces the frictional torque of the valve stem, which can make the valve stem operate smoothly and flexibly; anti-static function: a spring is set between the ball, the valve stem and the valve body, which can lead out the static electricity generated during the switching process; due to PTFE Other materials have good self-lubricity and small friction loss with the ball, so the pneumatic ball valve has a long service life; the fluid resistance is small: the pneumatic ball valve is the one with the smaller fluid resistance in all valve categories, even the reduced diameter pneumatic ball valve, Its fluid resistance is also quite small; the valve stem seal is reliable: because the valve stem only rotates and does not move up and down, the packing seal of the valve stem is not easy to break, and the sealing capacity increases with the increase of medium pressure; the sealing performance of the valve seat Good: The sealing ring made of elastic materials such as polytetrafluoroethylene, the structure is easy to seal, and the valve sealing ability of the pneumatic ball valve increases with the increase of the medium pressure; the fluid resistance is small, and the full-diameter ball valve basically has no flow resistance .
Simple structure, small size, light weight; compact and reliable. It has two sealing surfaces, and the sealing surface materials of the ball valve are widely used in various plastics, which have good sealing performance and can realize sealing. It has also been widely used in vacuum systems; it is easy to operate and open and close quickly. The ball valve only needs to be rotated 90° from fully open to fully closed, which is convenient for remote control; easy maintenance, simple structure of the ball valve, and the sealing ring is generally movable, disassembly It is more convenient to replace; when fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and the medium will not cause erosion of the valve sealing surface when the medium passes through; it has a wide range of applications, with a diameter ranging from a few millimeters to a large A few meters, it can be applied from high vacuum to high pressure; because the ball valve is wiped during the opening and closing process, it can be used in the medium with suspended solid particles; the processing accuracy is high, the cost is expensive, and it is not suitable for use at high temperatures, such as impurities in the pipeline , It is easy to be blocked by impurities, causing the valve to be unable to open.
